1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000
4 Free Software Foundation, Inc.
5 Derived from coffread.c, dbxread.c, and a lot of hacking.
6 Contributed by IBM Corporation.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
28 #include <sys/types.h>
31 #include "gdb_string.h"
33 #include <sys/param.h>
39 #include "coff/internal.h"
40 #include "libcoff.h" /* FIXME, internal data from BFD */
41 #include "coff/rs6000.h"
48 #include "stabsread.h"
49 #include "expression.h"
50 #include "language.h" /* Needed inside partial-stab.h */
51 #include "complaints.h"
53 #include "gdb-stabs.h"
55 /* For interface with stabsread.c. */
56 #include "aout/stab_gnu.h"
58 /* For interface with partial-stab.h. */
59 #define N_UNDF 0 /* Undefined symbol */
62 #define N_TEXT 4 /* Text sym -- defined at offset in text seg */
63 #define N_DATA 6 /* Data sym -- defined at offset in data seg */
64 #define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */
65 #define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */
66 #define N_FN 0x1f /* File name of .o file */
67 #define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh) */
68 /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
69 N_DATA, or N_BSS. When the low-order bit of other types is set,
70 (e.g. N_WARNING versus N_FN), they are two different types. */
71 #define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */
74 /* The following symbols refer to set elements.
75 All the N_SET[ATDB] symbols with the same name form one set.
76 Space is allocated for the set in the text section, and each set
77 elements value is stored into one word of the space.
78 The first word of the space is the length of the set (number of elements).
80 The address of the set is made into an N_SETV symbol
81 whose name is the same as the name of the set.
82 This symbol acts like a N_DATA global symbol
83 in that it can satisfy undefined external references. */
85 /* These appear as input to LD, in a .o file. */
86 #define N_SETA 0x14 /* Absolute set element symbol */
87 #define N_SETT 0x16 /* Text set element symbol */
88 #define N_SETD 0x18 /* Data set element symbol */
89 #define N_SETB 0x1A /* Bss set element symbol */
91 /* This is output from LD. */
92 #define N_SETV 0x1C /* Pointer to set vector in data area. */
94 /* We put a pointer to this structure in the read_symtab_private field
100 /* First symbol number for this file. */
104 /* Number of symbols in the section of the symbol table devoted to
105 this file's symbols (actually, the section bracketed may contain
106 more than just this file's symbols). If numsyms is 0, the only
107 reason for this thing's existence is the dependency list. Nothing
108 else will happen when it is read in. */
112 /* Position of the start of the line number information for this psymtab. */
113 unsigned int lineno_off;
116 /* Remember what we deduced to be the source language of this psymtab. */
118 static enum language psymtab_language = language_unknown;
121 /* Simplified internal version of coff symbol table information */
126 int c_symnum; /* symbol number of this entry */
127 int c_naux; /* 0 if syment only, 1 if syment + auxent */
129 unsigned char c_sclass;
134 /* last function's saved coff symbol `cs' */
136 static struct coff_symbol fcn_cs_saved;
138 static bfd *symfile_bfd;
140 /* Core address of start and end of text of current source file.
141 This is calculated from the first function seen after a C_FILE
145 static CORE_ADDR cur_src_end_addr;
147 /* Core address of the end of the first object file. */
149 static CORE_ADDR first_object_file_end;
151 /* initial symbol-table-debug-string vector length */
153 #define INITIAL_STABVECTOR_LENGTH 40
155 /* Nonzero if within a function (so symbols should be local,
156 if nothing says specifically). */
160 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
161 there is any reason not to just use a #define, but might as well
162 ask BFD for the size and store it here, I guess. */
164 static unsigned local_symesz;
166 struct coff_symfile_info
168 file_ptr min_lineno_offset; /* Where in file lowest line#s are */
169 file_ptr max_lineno_offset; /* 1+last byte of line#s in file */
171 /* Pointer to the string table. */
174 /* Pointer to debug section. */
177 /* Pointer to the a.out symbol table. */
180 /* Number of symbols in symtbl. */
183 /* Offset in data section to TOC anchor. */
184 CORE_ADDR toc_offset;
187 static struct complaint storclass_complaint =
188 {"Unexpected storage class: %d", 0, 0};
190 static struct complaint bf_notfound_complaint =
191 {"line numbers off, `.bf' symbol not found", 0, 0};
193 static struct complaint ef_complaint =
194 {"Mismatched .ef symbol ignored starting at symnum %d", 0, 0};
196 static struct complaint eb_complaint =
197 {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0};
199 static void xcoff_initial_scan (struct objfile *, int);
201 static void scan_xcoff_symtab (struct objfile *);
203 static char *xcoff_next_symbol_text (struct objfile *);
205 static void record_include_begin (struct coff_symbol *);
208 enter_line_range (struct subfile *, unsigned, unsigned,
209 CORE_ADDR, CORE_ADDR, unsigned *);
211 static void init_stringtab (bfd *, file_ptr, struct objfile *);
213 static void xcoff_symfile_init (struct objfile *);
215 static void xcoff_new_init (struct objfile *);
217 static void xcoff_symfile_finish (struct objfile *);
220 xcoff_symfile_offsets (struct objfile *, struct section_addr_info *addrs);
222 static void find_linenos (bfd *, sec_ptr, PTR);
224 static char *coff_getfilename (union internal_auxent *, struct objfile *);
226 static void read_symbol (struct internal_syment *, int);
228 static int read_symbol_lineno (int);
230 static CORE_ADDR read_symbol_nvalue (int);
232 static struct symbol *process_xcoff_symbol (struct coff_symbol *,
235 static void read_xcoff_symtab (struct partial_symtab *);
238 static void add_stab_to_list (char *, struct pending_stabs **);
241 static int compare_lte (const void *, const void *);
243 static struct linetable *arrange_linetable (struct linetable *);
245 static void record_include_end (struct coff_symbol *);
247 static void process_linenos (CORE_ADDR, CORE_ADDR);
250 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
252 static int secnum_to_section (int, struct objfile *);
253 static asection *secnum_to_bfd_section (int, struct objfile *);
255 struct find_targ_sec_arg
260 struct objfile *objfile;
263 static void find_targ_sec (bfd *, asection *, void *);
266 find_targ_sec (bfd *abfd, asection *sect, PTR obj)
268 struct find_targ_sec_arg *args = (struct find_targ_sec_arg *) obj;
269 struct objfile *objfile = args->objfile;
270 if (sect->target_index == args->targ_index)
272 /* This is the section. Figure out what SECT_OFF_* code it is. */
273 if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
274 *args->resultp = SECT_OFF_TEXT (objfile);
275 else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
276 *args->resultp = SECT_OFF_DATA (objfile);
278 *args->resultp = sect->index;
279 *args->bfd_sect = sect;
283 /* Return the section number (SECT_OFF_*) that CS points to. */
285 secnum_to_section (int secnum, struct objfile *objfile)
287 int off = SECT_OFF_TEXT (objfile);
288 asection *sect = NULL;
289 struct find_targ_sec_arg args;
290 args.targ_index = secnum;
292 args.bfd_sect = §
293 args.objfile = objfile;
294 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
298 /* Return the BFD section that CS points to. */
300 secnum_to_bfd_section (int secnum, struct objfile *objfile)
302 int off = SECT_OFF_TEXT (objfile);
303 asection *sect = NULL;
304 struct find_targ_sec_arg args;
305 args.targ_index = secnum;
307 args.bfd_sect = §
308 args.objfile = objfile;
309 bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
313 /* add a given stab string into given stab vector. */
318 add_stab_to_list (char *stabname, struct pending_stabs **stabvector)
320 if (*stabvector == NULL)
322 *stabvector = (struct pending_stabs *)
323 xmalloc (sizeof (struct pending_stabs) +
324 INITIAL_STABVECTOR_LENGTH * sizeof (char *));
325 (*stabvector)->count = 0;
326 (*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
328 else if ((*stabvector)->count >= (*stabvector)->length)
330 (*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
331 *stabvector = (struct pending_stabs *)
332 xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
333 (*stabvector)->length * sizeof (char *));
335 (*stabvector)->stab[(*stabvector)->count++] = stabname;
340 /* Linenos are processed on a file-by-file basis.
344 1) xlc (IBM's native c compiler) postpones static function code
345 emission to the end of a compilation unit. This way it can
346 determine if those functions (statics) are needed or not, and
347 can do some garbage collection (I think). This makes line
348 numbers and corresponding addresses unordered, and we end up
349 with a line table like:
366 and that breaks gdb's binary search on line numbers, if the
367 above table is not sorted on line numbers. And that sort
368 should be on function based, since gcc can emit line numbers
371 10 0x100 - for the init/test part of a for stmt.
374 10 0x400 - for the increment part of a for stmt.
376 arrange_linetable() will do this sorting.
378 2) aix symbol table might look like:
380 c_file // beginning of a new file
381 .bi // beginning of include file
382 .ei // end of include file
386 basically, .bi/.ei pairs do not necessarily encapsulate
387 their scope. They need to be recorded, and processed later
388 on when we come the end of the compilation unit.
389 Include table (inclTable) and process_linenos() handle
395 /* compare line table entry addresses. */
398 compare_lte (const void *lte1p, const void *lte2p)
400 struct linetable_entry *lte1 = (struct linetable_entry *) lte1p;
401 struct linetable_entry *lte2 = (struct linetable_entry *) lte2p;
402 return lte1->pc - lte2->pc;
405 /* Given a line table with function entries are marked, arrange its functions
406 in ascending order and strip off function entry markers and return it in
407 a newly created table. If the old one is good enough, return the old one. */
408 /* FIXME: I think all this stuff can be replaced by just passing
409 sort_linevec = 1 to end_symtab. */
411 static struct linetable *
412 arrange_linetable (struct linetable *oldLineTb)
414 int ii, jj, newline, /* new line count */
415 function_count; /* # of functions */
417 struct linetable_entry *fentry; /* function entry vector */
418 int fentry_size; /* # of function entries */
419 struct linetable *newLineTb; /* new line table */
421 #define NUM_OF_FUNCTIONS 20
423 fentry_size = NUM_OF_FUNCTIONS;
424 fentry = (struct linetable_entry *)
425 xmalloc (fentry_size * sizeof (struct linetable_entry));
427 for (function_count = 0, ii = 0; ii < oldLineTb->nitems; ++ii)
430 if (oldLineTb->item[ii].line == 0)
431 { /* function entry found. */
433 if (function_count >= fentry_size)
434 { /* make sure you have room. */
436 fentry = (struct linetable_entry *)
437 xrealloc (fentry, fentry_size * sizeof (struct linetable_entry));
439 fentry[function_count].line = ii;
440 fentry[function_count].pc = oldLineTb->item[ii].pc;
445 if (function_count == 0)
450 else if (function_count > 1)
451 qsort (fentry, function_count, sizeof (struct linetable_entry), compare_lte);
453 /* allocate a new line table. */
454 newLineTb = (struct linetable *)
456 (sizeof (struct linetable) +
457 (oldLineTb->nitems - function_count) * sizeof (struct linetable_entry));
459 /* if line table does not start with a function beginning, copy up until
463 if (oldLineTb->item[0].line != 0)
465 newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
466 newLineTb->item[newline] = oldLineTb->item[newline];
468 /* Now copy function lines one by one. */
470 for (ii = 0; ii < function_count; ++ii)
472 for (jj = fentry[ii].line + 1;
473 jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
475 newLineTb->item[newline] = oldLineTb->item[jj];
478 newLineTb->nitems = oldLineTb->nitems - function_count;
482 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
483 following `IncludeChain'. At the end of each symtab (end_symtab),
484 we will determine if we should create additional symtab's to
485 represent if (the include files. */
488 typedef struct _inclTable
490 char *name; /* include filename */
492 /* Offsets to the line table. end points to the last entry which is
493 part of this include file. */
496 struct subfile *subfile;
497 unsigned funStartLine; /* start line # of its function */
501 #define INITIAL_INCLUDE_TABLE_LENGTH 20
502 static InclTable *inclTable; /* global include table */
503 static int inclIndx; /* last entry to table */
504 static int inclLength; /* table length */
505 static int inclDepth; /* nested include depth */
507 static void allocate_include_entry (void);
510 record_include_begin (struct coff_symbol *cs)
514 /* In xcoff, we assume include files cannot be nested (not in .c files
515 of course, but in corresponding .s files.). */
517 /* This can happen with old versions of GCC.
518 GCC 2.3.3-930426 does not exhibit this on a test case which
519 a user said produced the message for him. */
520 static struct complaint msg =
521 {"Nested C_BINCL symbols", 0, 0};
526 allocate_include_entry ();
528 inclTable[inclIndx].name = cs->c_name;
529 inclTable[inclIndx].begin = cs->c_value;
533 record_include_end (struct coff_symbol *cs)
539 static struct complaint msg =
540 {"Mismatched C_BINCL/C_EINCL pair", 0, 0};
544 allocate_include_entry ();
546 pTbl = &inclTable[inclIndx];
547 pTbl->end = cs->c_value;
554 allocate_include_entry (void)
556 if (inclTable == NULL)
558 inclTable = (InclTable *)
559 xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
561 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
562 inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
565 else if (inclIndx >= inclLength)
567 inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
568 inclTable = (InclTable *)
569 xrealloc (inclTable, sizeof (InclTable) * inclLength);
570 memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
571 '\0', sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
575 /* Global variable to pass the psymtab down to all the routines involved
576 in psymtab to symtab processing. */
577 static struct partial_symtab *this_symtab_psymtab;
579 /* given the start and end addresses of a compilation unit (or a csect,
580 at times) process its lines and create appropriate line vectors. */
583 process_linenos (CORE_ADDR start, CORE_ADDR end)
586 file_ptr max_offset =
587 ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private)
590 /* subfile structure for the main compilation unit. */
591 struct subfile main_subfile;
593 /* In the main source file, any time we see a function entry, we
594 reset this variable to function's absolute starting line number.
595 All the following line numbers in the function are relative to
596 this, and we record absolute line numbers in record_line(). */
598 unsigned int main_source_baseline = 0;
603 ((struct symloc *) this_symtab_psymtab->read_symtab_private)->lineno_off;
605 goto return_after_cleanup;
607 memset (&main_subfile, '\0', sizeof (main_subfile));
610 /* All source lines were in the main source file. None in include files. */
612 enter_line_range (&main_subfile, offset, 0, start, end,
613 &main_source_baseline);
617 /* There was source with line numbers in include files. */
620 coff_data (this_symtab_psymtab->objfile->obfd)->local_linesz;
621 main_source_baseline = 0;
623 for (ii = 0; ii < inclIndx; ++ii)
625 struct subfile *tmpSubfile;
627 /* If there is main file source before include file, enter it. */
628 if (offset < inclTable[ii].begin)
631 (&main_subfile, offset, inclTable[ii].begin - linesz,
632 start, 0, &main_source_baseline);
635 /* Have a new subfile for the include file. */
637 tmpSubfile = inclTable[ii].subfile =
638 (struct subfile *) xmalloc (sizeof (struct subfile));
640 memset (tmpSubfile, '\0', sizeof (struct subfile));
641 firstLine = &(inclTable[ii].funStartLine);
643 /* Enter include file's lines now. */
644 enter_line_range (tmpSubfile, inclTable[ii].begin,
645 inclTable[ii].end, start, 0, firstLine);
647 if (offset <= inclTable[ii].end)
648 offset = inclTable[ii].end + linesz;
651 /* All the include files' line have been processed at this point. Now,
652 enter remaining lines of the main file, if any left. */
653 if (offset < max_offset + 1 - linesz)
655 enter_line_range (&main_subfile, offset, 0, start, end,
656 &main_source_baseline);
660 /* Process main file's line numbers. */
661 if (main_subfile.line_vector)
663 struct linetable *lineTb, *lv;
665 lv = main_subfile.line_vector;
667 /* Line numbers are not necessarily ordered. xlc compilation will
668 put static function to the end. */
670 lineTb = arrange_linetable (lv);
673 current_subfile->line_vector = (struct linetable *)
674 xrealloc (lv, (sizeof (struct linetable)
675 + lv->nitems * sizeof (struct linetable_entry)));
680 current_subfile->line_vector = lineTb;
683 current_subfile->line_vector_length =
684 current_subfile->line_vector->nitems;
687 /* Now, process included files' line numbers. */
689 for (ii = 0; ii < inclIndx; ++ii)
691 if ((inclTable[ii].subfile)->line_vector) /* Useless if!!! FIXMEmgo */
693 struct linetable *lineTb, *lv;
695 lv = (inclTable[ii].subfile)->line_vector;
697 /* Line numbers are not necessarily ordered. xlc compilation will
698 put static function to the end. */
700 lineTb = arrange_linetable (lv);
704 /* For the same include file, we might want to have more than one
705 subfile. This happens if we have something like:
713 while foo.h including code in it. (stupid but possible)
714 Since start_subfile() looks at the name and uses an
715 existing one if finds, we need to provide a fake name and
719 start_subfile (inclTable[ii].name, (char *) 0);
722 /* Pick a fake name that will produce the same results as this
723 one when passed to deduce_language_from_filename. Kludge on
725 char *fakename = strrchr (inclTable[ii].name, '.');
726 if (fakename == NULL)
728 start_subfile (fakename, (char *) 0);
729 xfree (current_subfile->name);
731 current_subfile->name = xstrdup (inclTable[ii].name);
736 current_subfile->line_vector =
737 (struct linetable *) xrealloc
738 (lv, (sizeof (struct linetable)
739 + lv->nitems * sizeof (struct linetable_entry)));
745 current_subfile->line_vector = lineTb;
748 current_subfile->line_vector_length =
749 current_subfile->line_vector->nitems;
750 start_subfile (pop_subfile (), (char *) 0);
754 return_after_cleanup:
756 /* We don't want to keep alloc/free'ing the global include file table. */
759 /* Start with a fresh subfile structure for the next file. */
760 memset (&main_subfile, '\0', sizeof (struct subfile));
764 aix_process_linenos (void)
766 /* process line numbers and enter them into line vector */
767 process_linenos (last_source_start_addr, cur_src_end_addr);
771 /* Enter a given range of lines into the line vector.
772 can be called in the following two ways:
773 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
774 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
776 endoffset points to the last line table entry that we should pay
780 enter_line_range (struct subfile *subfile, unsigned beginoffset, unsigned endoffset, /* offsets to line table */
781 CORE_ADDR startaddr, /* offsets to line table */
782 CORE_ADDR endaddr, unsigned *firstLine)
784 unsigned int curoffset;
787 struct internal_lineno int_lnno;
788 unsigned int limit_offset;
792 if (endoffset == 0 && startaddr == 0 && endaddr == 0)
794 curoffset = beginoffset;
796 ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private)
801 if (endoffset >= limit_offset)
803 static struct complaint msg =
804 {"Bad line table offset in C_EINCL directive", 0, 0};
808 limit_offset = endoffset;
813 abfd = this_symtab_psymtab->objfile->obfd;
814 linesz = coff_data (abfd)->local_linesz;
815 ext_lnno = alloca (linesz);
817 while (curoffset <= limit_offset)
819 bfd_seek (abfd, curoffset, SEEK_SET);
820 bfd_read (ext_lnno, linesz, 1, abfd);
821 bfd_coff_swap_lineno_in (abfd, ext_lnno, &int_lnno);
823 /* Find the address this line represents. */
824 addr = (int_lnno.l_lnno
825 ? int_lnno.l_addr.l_paddr
826 : read_symbol_nvalue (int_lnno.l_addr.l_symndx));
827 addr += ANOFFSET (this_symtab_psymtab->objfile->section_offsets,
828 SECT_OFF_TEXT (this_symtab_psymtab->objfile));
830 if (addr < startaddr || (endaddr && addr >= endaddr))
833 if (int_lnno.l_lnno == 0)
835 *firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
836 record_line (subfile, 0, addr);
840 record_line (subfile, *firstLine + int_lnno.l_lnno, addr);
846 /* Save the vital information for use when closing off the current file.
847 NAME is the file name the symbols came from, START_ADDR is the first
848 text address for the file, and SIZE is the number of bytes of text. */
850 #define complete_symtab(name, start_addr) { \
851 last_source_file = savestring (name, strlen (name)); \
852 last_source_start_addr = start_addr; \
856 /* Refill the symbol table input buffer
857 and set the variables that control fetching entries from it.
858 Reports an error if no data available.
859 This function can read past the end of the symbol table
860 (into the string table) but this does no harm. */
862 /* Reading symbol table has to be fast! Keep the followings as macros, rather
865 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \
869 if (namestr[0] == '.') ++namestr; \
870 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
871 (char *)NULL, (SECTION), (asection *)NULL, (OBJFILE)); \
872 misc_func_recorded = 1; \
876 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
877 nested. At any given time, a symbol can only be in one static block.
878 This is the base address of current static block, zero if non exists. */
880 static int static_block_base = 0;
882 /* Section number for the current static block. */
884 static int static_block_section = -1;
886 /* true if space for symbol name has been allocated. */
888 static int symname_alloced = 0;
890 /* Next symbol to read. Pointer into raw seething symbol table. */
892 static char *raw_symbol;
894 /* This is the function which stabsread.c calls to get symbol
898 xcoff_next_symbol_text (struct objfile *objfile)
900 struct internal_syment symbol;
901 static struct complaint msg =
902 {"Unexpected symbol continuation", 0, 0};
904 /* FIXME: is this the same as the passed arg? */
905 objfile = this_symtab_psymtab->objfile;
907 bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
912 /* Return something which points to '\0' and hope the symbol reading
913 code does something reasonable. */
916 else if (symbol.n_sclass & 0x80)
919 ((struct coff_symfile_info *) objfile->sym_private)->debugsec
922 coff_data (objfile->obfd)->local_symesz;
929 /* Return something which points to '\0' and hope the symbol reading
930 code does something reasonable. */
936 /* Read symbols for a given partial symbol table. */
939 read_xcoff_symtab (struct partial_symtab *pst)
941 struct objfile *objfile = pst->objfile;
942 bfd *abfd = objfile->obfd;
943 char *raw_auxptr; /* Pointer to first raw aux entry for sym */
944 char *strtbl = ((struct coff_symfile_info *) objfile->sym_private)->strtbl;
946 ((struct coff_symfile_info *) objfile->sym_private)->debugsec;
947 char *debugfmt = xcoff_data (abfd)->xcoff64 ? "XCOFF64" : "XCOFF";
949 struct internal_syment symbol[1];
950 union internal_auxent main_aux;
951 struct coff_symbol cs[1];
952 CORE_ADDR file_start_addr = 0;
953 CORE_ADDR file_end_addr = 0;
955 int next_file_symnum = -1;
956 unsigned int max_symnum;
957 int just_started = 1;
959 int fcn_start_addr = 0;
961 struct coff_symbol fcn_stab_saved;
963 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
964 union internal_auxent fcn_aux_saved;
965 struct context_stack *new;
967 char *filestring = " _start_ "; /* Name of the current file. */
969 char *last_csect_name; /* last seen csect's name and value */
970 CORE_ADDR last_csect_val;
973 this_symtab_psymtab = pst;
975 /* Get the appropriate COFF "constants" related to the file we're
977 local_symesz = coff_data (abfd)->local_symesz;
979 last_source_file = NULL;
984 start_symtab (filestring, (char *) NULL, file_start_addr);
985 record_debugformat (debugfmt);
986 symnum = ((struct symloc *) pst->read_symtab_private)->first_symnum;
988 symnum + ((struct symloc *) pst->read_symtab_private)->numsyms;
989 first_object_file_end = 0;
992 ((struct coff_symfile_info *) objfile->sym_private)->symtbl
993 + symnum * local_symesz;
995 while (symnum < max_symnum)
998 QUIT; /* make this command interruptable. */
1000 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1001 /* read one symbol into `cs' structure. After processing the
1002 whole symbol table, only string table will be kept in memory,
1003 symbol table and debug section of xcoff will be freed. Thus
1004 we can mark symbols with names in string table as
1009 /* Swap and align the symbol into a reasonable C structure. */
1010 bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
1012 cs->c_symnum = symnum;
1013 cs->c_naux = symbol->n_numaux;
1014 if (symbol->n_zeroes)
1016 symname_alloced = 0;
1017 /* We must use the original, unswapped, name here so the name field
1018 pointed to by cs->c_name will persist throughout xcoffread. If
1019 we use the new field, it gets overwritten for each symbol. */
1020 cs->c_name = ((struct external_syment *) raw_symbol)->e.e_name;
1021 /* If it's exactly E_SYMNMLEN characters long it isn't
1023 if (cs->c_name[E_SYMNMLEN - 1] != '\0')
1026 p = obstack_alloc (&objfile->symbol_obstack, E_SYMNMLEN + 1);
1027 strncpy (p, cs->c_name, E_SYMNMLEN);
1028 p[E_SYMNMLEN] = '\0';
1030 symname_alloced = 1;
1033 else if (symbol->n_sclass & 0x80)
1035 cs->c_name = debugsec + symbol->n_offset;
1036 symname_alloced = 0;
1040 /* in string table */
1041 cs->c_name = strtbl + (int) symbol->n_offset;
1042 symname_alloced = 1;
1044 cs->c_value = symbol->n_value;
1045 cs->c_sclass = symbol->n_sclass;
1046 cs->c_secnum = symbol->n_scnum;
1047 cs->c_type = (unsigned) symbol->n_type;
1049 raw_symbol += local_symesz;
1052 /* Save addr of first aux entry. */
1053 raw_auxptr = raw_symbol;
1055 /* Skip all the auxents associated with this symbol. */
1056 for (ii = symbol->n_numaux; ii; --ii)
1058 raw_symbol += coff_data (abfd)->local_auxesz;
1063 /* if symbol name starts with ".$" or "$", ignore it. */
1064 if (cs->c_name[0] == '$'
1065 || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
1068 if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE)
1070 if (last_source_file)
1073 end_symtab (cur_src_end_addr, objfile, SECT_OFF_TEXT (objfile));
1078 start_symtab ("_globals_", (char *) NULL, (CORE_ADDR) 0);
1079 record_debugformat (debugfmt);
1080 cur_src_end_addr = first_object_file_end;
1081 /* done with all files, everything from here on is globals */
1084 /* if explicitly specified as a function, treat is as one. */
1085 if (ISFCN (cs->c_type) && cs->c_sclass != C_TPDEF)
1087 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1088 0, cs->c_naux, &main_aux);
1089 goto function_entry_point;
1092 if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
1095 /* Dealing with a symbol with a csect entry. */
1097 #define CSECT(PP) ((PP)->x_csect)
1098 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1099 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1100 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1101 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1103 /* Convert the auxent to something we can access. */
1104 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1105 0, cs->c_naux, &main_aux);
1107 switch (CSECT_SMTYP (&main_aux))
1111 /* Ignore all external references. */
1115 /* A section description. */
1117 switch (CSECT_SCLAS (&main_aux))
1123 /* A program csect is seen. We have to allocate one
1124 symbol table for each program csect. Normally gdb
1125 prefers one symtab for each source file. In case
1126 of AIX, one source file might include more than one
1127 [PR] csect, and they don't have to be adjacent in
1128 terms of the space they occupy in memory. Thus, one
1129 single source file might get fragmented in the
1130 memory and gdb's file start and end address
1131 approach does not work! GCC (and I think xlc) seem
1132 to put all the code in the unnamed program csect. */
1134 if (last_csect_name)
1136 complete_symtab (filestring, file_start_addr);
1137 cur_src_end_addr = file_end_addr;
1138 end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1141 /* Give all csects for this source file the same
1143 start_symtab (filestring, NULL, (CORE_ADDR) 0);
1144 record_debugformat (debugfmt);
1147 /* If this is the very first csect seen,
1148 basically `__start'. */
1151 first_object_file_end
1152 = cs->c_value + CSECT_LEN (&main_aux);
1157 cs->c_value + ANOFFSET (objfile->section_offsets,
1158 SECT_OFF_TEXT (objfile));
1159 file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
1161 if (cs->c_name && cs->c_name[0] == '.')
1163 last_csect_name = cs->c_name;
1164 last_csect_val = cs->c_value;
1165 last_csect_sec = secnum_to_section (cs->c_secnum, objfile);
1170 /* All other symbols are put into the minimal symbol
1183 /* Ignore the symbol. */
1191 switch (CSECT_SCLAS (&main_aux))
1194 /* a function entry point. */
1195 function_entry_point:
1197 fcn_start_addr = cs->c_value;
1199 /* save the function header info, which will be used
1200 when `.bf' is seen. */
1202 fcn_aux_saved = main_aux;
1206 /* shared library function trampoline code entry point. */
1210 /* The symbols often have the same names as debug symbols for
1211 functions, and confuse lookup_symbol. */
1215 /* xlc puts each variable in a separate csect, so we get
1216 an XTY_SD for each variable. But gcc puts several
1217 variables in a csect, so that each variable only gets
1218 an XTY_LD. This will typically be XMC_RW; I suspect
1219 XMC_RO and XMC_BS might be possible too.
1220 These variables are put in the minimal symbol table
1227 /* Common symbols are put into the minimal symbol table only. */
1235 switch (cs->c_sclass)
1240 /* c_value field contains symnum of next .file entry in table
1241 or symnum of first global after last .file. */
1243 next_file_symnum = cs->c_value;
1245 /* Complete symbol table for last object file containing
1246 debugging information. */
1248 /* Whether or not there was a csect in the previous file, we
1249 have to call `end_stabs' and `start_stabs' to reset
1250 type_vector, line_vector, etc. structures. */
1252 complete_symtab (filestring, file_start_addr);
1253 cur_src_end_addr = file_end_addr;
1254 end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1257 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1258 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1259 standard COFF way and put it in the auxent. We use the auxent if
1260 the symbol is ".file" and an auxent exists, otherwise use the symbol
1261 itself. Simple enough. */
1262 if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
1264 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1265 0, cs->c_naux, &main_aux);
1266 filestring = coff_getfilename (&main_aux, objfile);
1269 filestring = cs->c_name;
1272 start_symtab (filestring, (char *) NULL, (CORE_ADDR) 0);
1273 record_debugformat (debugfmt);
1274 last_csect_name = 0;
1276 /* reset file start and end addresses. A compilation unit with no text
1277 (only data) should have zero file boundaries. */
1278 file_start_addr = file_end_addr = 0;
1282 fcn_stab_saved = *cs;
1286 if (STREQ (cs->c_name, ".bf"))
1288 CORE_ADDR off = ANOFFSET (objfile->section_offsets,
1289 SECT_OFF_TEXT (objfile));
1290 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1291 0, cs->c_naux, &main_aux);
1293 within_function = 1;
1295 new = push_context (0, fcn_start_addr + off);
1297 new->name = define_symbol
1298 (fcn_cs_saved.c_value + off,
1299 fcn_stab_saved.c_name, 0, 0, objfile);
1300 if (new->name != NULL)
1301 SYMBOL_SECTION (new->name) = SECT_OFF_TEXT (objfile);
1303 else if (STREQ (cs->c_name, ".ef"))
1306 bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
1307 0, cs->c_naux, &main_aux);
1309 /* The value of .ef is the address of epilogue code;
1310 not useful for gdb. */
1311 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1312 contains number of lines to '}' */
1314 if (context_stack_depth <= 0)
1315 { /* We attempted to pop an empty context stack */
1316 complain (&ef_complaint, cs->c_symnum);
1317 within_function = 0;
1320 new = pop_context ();
1321 /* Stack must be empty now. */
1322 if (context_stack_depth > 0 || new == NULL)
1324 complain (&ef_complaint, cs->c_symnum);
1325 within_function = 0;
1329 finish_block (new->name, &local_symbols, new->old_blocks,
1331 (fcn_cs_saved.c_value
1332 + fcn_aux_saved.x_sym.x_misc.x_fsize
1333 + ANOFFSET (objfile->section_offsets,
1334 SECT_OFF_TEXT (objfile))),
1336 within_function = 0;
1341 /* Begin static block. */
1343 struct internal_syment symbol;
1345 read_symbol (&symbol, cs->c_value);
1346 static_block_base = symbol.n_value;
1347 static_block_section =
1348 secnum_to_section (symbol.n_scnum, objfile);
1353 /* End of static block. */
1354 static_block_base = 0;
1355 static_block_section = -1;
1366 static struct complaint msg =
1367 {"Unrecognized storage class %d.", 0, 0};
1368 complain (&msg, cs->c_sclass);
1382 /* beginning of include file */
1383 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1384 order. Thus, when wee see them, we might not know enough info
1385 to process them. Thus, we'll be saving them into a table
1386 (inclTable) and postpone their processing. */
1388 record_include_begin (cs);
1392 /* End of include file. */
1393 /* See the comment after case C_BINCL. */
1394 record_include_end (cs);
1398 if (STREQ (cs->c_name, ".bb"))
1401 new = push_context (depth,
1403 + ANOFFSET (objfile->section_offsets,
1404 SECT_OFF_TEXT (objfile))));
1406 else if (STREQ (cs->c_name, ".eb"))
1408 if (context_stack_depth <= 0)
1409 { /* We attempted to pop an empty context stack */
1410 complain (&eb_complaint, cs->c_symnum);
1413 new = pop_context ();
1414 if (depth-- != new->depth)
1416 complain (&eb_complaint, cs->c_symnum);
1419 if (local_symbols && context_stack_depth > 0)
1421 /* Make a block for the local symbols within. */
1422 finish_block (new->name, &local_symbols, new->old_blocks,
1425 + ANOFFSET (objfile->section_offsets,
1426 SECT_OFF_TEXT (objfile))),
1429 local_symbols = new->locals;
1434 process_xcoff_symbol (cs, objfile);
1439 if (last_source_file)
1443 complete_symtab (filestring, file_start_addr);
1444 cur_src_end_addr = file_end_addr;
1445 s = end_symtab (file_end_addr, objfile, SECT_OFF_TEXT (objfile));
1446 /* When reading symbols for the last C_FILE of the objfile, try
1447 to make sure that we set pst->symtab to the symtab for the
1448 file, not to the _globals_ symtab. I'm not sure whether this
1449 actually works right or when/if it comes up. */
1450 if (pst->symtab == NULL)
1456 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1457 (SYMBOL2) = (struct symbol *) \
1458 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
1459 *(SYMBOL2) = *(SYMBOL1);
1462 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1463 (ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->symbol_obstack);
1466 static struct type *func_symbol_type;
1467 static struct type *var_symbol_type;
1469 /* process one xcoff symbol. */
1471 static struct symbol *
1472 process_xcoff_symbol (register struct coff_symbol *cs, struct objfile *objfile)
1474 struct symbol onesymbol;
1475 register struct symbol *sym = &onesymbol;
1476 struct symbol *sym2 = NULL;
1482 if (cs->c_secnum < 0)
1484 /* The value is a register number, offset within a frame, etc.,
1485 and does not get relocated. */
1491 sec = secnum_to_section (cs->c_secnum, objfile);
1492 off = ANOFFSET (objfile->section_offsets, sec);
1499 memset (sym, '\0', sizeof (struct symbol));
1501 /* default assumptions */
1502 SYMBOL_VALUE_ADDRESS (sym) = cs->c_value + off;
1503 SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
1504 SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
1506 if (ISFCN (cs->c_type))
1508 /* At this point, we don't know the type of the function. This
1509 will be patched with the type from its stab entry later on in
1510 patch_block_stabs (), unless the file was compiled without -g. */
1512 SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
1513 SYMBOL_TYPE (sym) = func_symbol_type;
1515 SYMBOL_CLASS (sym) = LOC_BLOCK;
1516 SYMBOL_DUP (sym, sym2);
1518 if (cs->c_sclass == C_EXT)
1519 add_symbol_to_list (sym2, &global_symbols);
1520 else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
1521 add_symbol_to_list (sym2, &file_symbols);
1525 /* In case we can't figure out the type, provide default. */
1526 SYMBOL_TYPE (sym) = var_symbol_type;
1528 switch (cs->c_sclass)
1531 /* The values of functions and global symbols are now resolved
1532 via the global_sym_chain in stabsread.c. */
1534 if (fcn_cs_saved.c_sclass == C_EXT)
1535 add_stab_to_list (name, &global_stabs);
1537 add_stab_to_list (name, &file_stabs);
1541 add_stab_to_list (name, &global_stabs);
1546 common_block_start (cs->c_name, objfile);
1550 common_block_end (objfile);
1554 complain (&storclass_complaint, cs->c_sclass);
1566 sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
1569 SYMBOL_SECTION (sym) = sec;
1576 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1577 all statics and we need to distinguish file-scope versus
1578 function-scope using within_function. We do this by
1579 changing the string we pass to define_symbol to use 'S'
1580 where we need to, which is not necessarily super-clean,
1581 but seems workable enough. */
1583 if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL)
1587 if (*pp == 'V' && !within_function)
1589 sym = define_symbol ((cs->c_value
1590 + ANOFFSET (objfile->section_offsets,
1591 static_block_section)),
1592 cs->c_name, 0, 0, objfile);
1595 SYMBOL_VALUE_ADDRESS (sym) += static_block_base;
1596 SYMBOL_SECTION (sym) = static_block_section;
1605 /* Extract the file name from the aux entry of a C_FILE symbol.
1606 Result is in static storage and is only good for temporary use. */
1609 coff_getfilename (union internal_auxent *aux_entry, struct objfile *objfile)
1611 static char buffer[BUFSIZ];
1613 if (aux_entry->x_file.x_n.x_zeroes == 0)
1615 ((struct coff_symfile_info *) objfile->sym_private)->strtbl
1616 + aux_entry->x_file.x_n.x_offset);
1619 strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
1620 buffer[FILNMLEN] = '\0';
1625 /* Set *SYMBOL to symbol number symno in symtbl. */
1627 read_symbol (struct internal_syment *symbol, int symno)
1630 ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private)
1633 ((struct coff_symfile_info *) this_symtab_psymtab->objfile->sym_private)
1635 if (symno < 0 || symno >= nsyms)
1637 static struct complaint msg =
1638 {"Invalid symbol offset", 0, 0};
1640 symbol->n_value = 0;
1641 symbol->n_scnum = -1;
1644 bfd_coff_swap_sym_in (this_symtab_psymtab->objfile->obfd,
1645 stbl + (symno * local_symesz),
1649 /* Get value corresponding to symbol number symno in symtbl. */
1652 read_symbol_nvalue (int symno)
1654 struct internal_syment symbol[1];
1656 read_symbol (symbol, symno);
1657 return symbol->n_value;
1661 /* Find the address of the function corresponding to symno, where
1662 symno is the symbol pointed to by the linetable. */
1665 read_symbol_lineno (int symno)
1667 struct objfile *objfile = this_symtab_psymtab->objfile;
1668 boolean xcoff64 = xcoff_data (objfile->obfd)->xcoff64;
1670 struct coff_symfile_info *info =
1671 (struct coff_symfile_info *)objfile->sym_private;
1672 int nsyms = info->symtbl_num_syms;
1673 char *stbl = info->symtbl;
1674 char *strtbl = info->strtbl;
1676 struct internal_syment symbol[1];
1677 union internal_auxent main_aux[1];
1681 complain (&bf_notfound_complaint);
1685 /* Note that just searching for a short distance (e.g. 50 symbols)
1686 is not enough, at least in the following case.
1689 [many .stabx entries]
1690 [a few functions, referring to foo]
1694 What happens here is that the assembler moves the .stabx entries
1695 to right before the ".bf" for foo, but the symbol for "foo" is before
1696 all the stabx entries. See PR gdb/2222. */
1698 /* Maintaining a table of .bf entries might be preferable to this search.
1699 If I understand things correctly it would need to be done only for
1700 the duration of a single psymtab to symtab conversion. */
1701 while (symno < nsyms)
1703 bfd_coff_swap_sym_in (symfile_bfd,
1704 stbl + (symno * local_symesz), symbol);
1705 if (symbol->n_sclass == C_FCN)
1707 char *name = xcoff64 ? strtbl + symbol->n_offset : symbol->n_name;
1708 if (STREQ (name, ".bf"))
1711 symno += symbol->n_numaux + 1;
1714 complain (&bf_notfound_complaint);
1718 /* take aux entry and return its lineno */
1720 bfd_coff_swap_aux_in (objfile->obfd, stbl + symno * local_symesz,
1721 symbol->n_type, symbol->n_sclass,
1722 0, symbol->n_numaux, main_aux);
1724 return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
1727 /* Support for line number handling */
1729 /* This function is called for every section; it finds the outer limits
1730 * of the line table (minimum and maximum file offset) so that the
1731 * mainline code can read the whole thing for efficiency.
1734 find_linenos (bfd *abfd, sec_ptr asect, PTR vpinfo)
1736 struct coff_symfile_info *info;
1738 file_ptr offset, maxoff;
1740 count = asect->lineno_count;
1742 if (!STREQ (asect->name, ".text") || count == 0)
1745 size = count * coff_data (abfd)->local_linesz;
1746 info = (struct coff_symfile_info *) vpinfo;
1747 offset = asect->line_filepos;
1748 maxoff = offset + size;
1750 if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
1751 info->min_lineno_offset = offset;
1753 if (maxoff > info->max_lineno_offset)
1754 info->max_lineno_offset = maxoff;
1757 static void xcoff_psymtab_to_symtab_1 (struct partial_symtab *);
1760 xcoff_psymtab_to_symtab_1 (struct partial_symtab *pst)
1762 struct cleanup *old_chain;
1771 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1776 /* Read in all partial symtabs on which this one is dependent */
1777 for (i = 0; i < pst->number_of_dependencies; i++)
1778 if (!pst->dependencies[i]->readin)
1780 /* Inform about additional files that need to be read in. */
1783 fputs_filtered (" ", gdb_stdout);
1785 fputs_filtered ("and ", gdb_stdout);
1787 printf_filtered ("%s...", pst->dependencies[i]->filename);
1788 wrap_here (""); /* Flush output */
1789 gdb_flush (gdb_stdout);
1791 xcoff_psymtab_to_symtab_1 (pst->dependencies[i]);
1794 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0)
1796 /* Init stuff necessary for reading in symbols. */
1799 old_chain = make_cleanup (really_free_pendings, 0);
1801 read_xcoff_symtab (pst);
1802 sort_symtab_syms (pst->symtab);
1804 do_cleanups (old_chain);
1810 static void xcoff_psymtab_to_symtab (struct partial_symtab *);
1812 /* Read in all of the symbols for a given psymtab for real.
1813 Be verbose about it if the user wants that. */
1816 xcoff_psymtab_to_symtab (struct partial_symtab *pst)
1826 (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1831 if (((struct symloc *) pst->read_symtab_private)->numsyms != 0
1832 || pst->number_of_dependencies)
1834 /* Print the message now, before reading the string table,
1835 to avoid disconcerting pauses. */
1838 printf_filtered ("Reading in symbols for %s...", pst->filename);
1839 gdb_flush (gdb_stdout);
1842 sym_bfd = pst->objfile->obfd;
1844 next_symbol_text_func = xcoff_next_symbol_text;
1846 xcoff_psymtab_to_symtab_1 (pst);
1848 /* Match with global symbols. This only needs to be done once,
1849 after all of the symtabs and dependencies have been read in. */
1850 scan_file_globals (pst->objfile);
1852 /* Finish up the debug error message. */
1854 printf_filtered ("done.\n");
1859 xcoff_new_init (struct objfile *objfile)
1861 stabsread_new_init ();
1862 buildsym_new_init ();
1865 /* Do initialization in preparation for reading symbols from OBJFILE.
1867 We will only be called if this is an XCOFF or XCOFF-like file.
1868 BFD handles figuring out the format of the file, and code in symfile.c
1869 uses BFD's determination to vector to us. */
1872 xcoff_symfile_init (struct objfile *objfile)
1874 /* Allocate struct to keep track of the symfile */
1875 objfile->sym_private = xmmalloc (objfile->md,
1876 sizeof (struct coff_symfile_info));
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;
1883 init_entry_point_info (objfile);
1886 /* Perform any local cleanups required when we are done with a particular
1887 objfile. I.E, we are in the process of discarding all symbol information
1888 for an objfile, freeing up all memory held for it, and unlinking the
1889 objfile struct from the global list of known objfiles. */
1892 xcoff_symfile_finish (struct objfile *objfile)
1894 if (objfile->sym_private != NULL)
1896 mfree (objfile->md, objfile->sym_private);
1899 /* Start with a fresh include table for the next objfile. */
1905 inclIndx = inclLength = inclDepth = 0;
1910 init_stringtab (bfd *abfd, file_ptr offset, struct objfile *objfile)
1914 unsigned char lengthbuf[4];
1917 ((struct coff_symfile_info *) objfile->sym_private)->strtbl = NULL;
1919 if (bfd_seek (abfd, offset, SEEK_SET) < 0)
1920 error ("cannot seek to string table in %s: %s",
1921 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1923 val = bfd_read ((char *) lengthbuf, 1, sizeof lengthbuf, abfd);
1924 length = bfd_h_get_32 (abfd, lengthbuf);
1926 /* If no string table is needed, then the file may end immediately
1927 after the symbols. Just return with `strtbl' set to NULL. */
1929 if (val != sizeof lengthbuf || length < sizeof lengthbuf)
1932 /* Allocate string table from symbol_obstack. We will need this table
1933 as long as we have its symbol table around. */
1935 strtbl = (char *) obstack_alloc (&objfile->symbol_obstack, length);
1936 ((struct coff_symfile_info *) objfile->sym_private)->strtbl = strtbl;
1938 /* Copy length buffer, the first byte is usually zero and is
1939 used for stabs with a name length of zero. */
1940 memcpy (strtbl, lengthbuf, sizeof lengthbuf);
1941 if (length == sizeof lengthbuf)
1944 val = bfd_read (strtbl + sizeof lengthbuf, 1, length - sizeof lengthbuf,
1947 if (val != length - sizeof lengthbuf)
1948 error ("cannot read string table from %s: %s",
1949 bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
1950 if (strtbl[length - 1] != '\0')
1951 error ("bad symbol file: string table does not end with null character");
1956 /* If we have not yet seen a function for this psymtab, this is 0. If we
1957 have seen one, it is the offset in the line numbers of the line numbers
1959 static unsigned int first_fun_line_offset;
1961 static struct partial_symtab *xcoff_start_psymtab
1962 (struct objfile *, char *, int,
1963 struct partial_symbol **, struct partial_symbol **);
1965 /* Allocate and partially fill a partial symtab. It will be
1966 completely filled at the end of the symbol list.
1968 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1969 is the address relative to which its symbols are (incremental) or 0
1972 static struct partial_symtab *
1973 xcoff_start_psymtab (struct objfile *objfile, char *filename, int first_symnum,
1974 struct partial_symbol **global_syms,
1975 struct partial_symbol **static_syms)
1977 struct partial_symtab *result =
1978 start_psymtab_common (objfile, objfile->section_offsets,
1980 /* We fill in textlow later. */
1982 global_syms, static_syms);
1984 result->read_symtab_private = (char *)
1985 obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc));
1986 ((struct symloc *) result->read_symtab_private)->first_symnum = first_symnum;
1987 result->read_symtab = xcoff_psymtab_to_symtab;
1989 /* Deduce the source language from the filename for this psymtab. */
1990 psymtab_language = deduce_language_from_filename (filename);
1995 static struct partial_symtab *xcoff_end_psymtab
1996 (struct partial_symtab *, char **, int, int,
1997 struct partial_symtab **, int, int);
1999 /* Close off the current usage of PST.
2000 Returns PST, or NULL if the partial symtab was empty and thrown away.
2002 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2004 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2005 are the information for includes and dependencies. */
2007 static struct partial_symtab *
2008 xcoff_end_psymtab (struct partial_symtab *pst, char **include_list,
2009 int num_includes, int capping_symbol_number,
2010 struct partial_symtab **dependency_list,
2011 int number_dependencies, int textlow_not_set)
2014 struct objfile *objfile = pst->objfile;
2016 if (capping_symbol_number != -1)
2017 ((struct symloc *) pst->read_symtab_private)->numsyms =
2018 capping_symbol_number
2019 - ((struct symloc *) pst->read_symtab_private)->first_symnum;
2020 ((struct symloc *) pst->read_symtab_private)->lineno_off =
2021 first_fun_line_offset;
2022 first_fun_line_offset = 0;
2023 pst->n_global_syms =
2024 objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
2025 pst->n_static_syms =
2026 objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
2028 pst->number_of_dependencies = number_dependencies;
2029 if (number_dependencies)
2031 pst->dependencies = (struct partial_symtab **)
2032 obstack_alloc (&objfile->psymbol_obstack,
2033 number_dependencies * sizeof (struct partial_symtab *));
2034 memcpy (pst->dependencies, dependency_list,
2035 number_dependencies * sizeof (struct partial_symtab *));
2038 pst->dependencies = 0;
2040 for (i = 0; i < num_includes; i++)
2042 struct partial_symtab *subpst =
2043 allocate_psymtab (include_list[i], objfile);
2045 subpst->section_offsets = pst->section_offsets;
2046 subpst->read_symtab_private =
2047 (char *) obstack_alloc (&objfile->psymbol_obstack,
2048 sizeof (struct symloc));
2049 ((struct symloc *) subpst->read_symtab_private)->first_symnum = 0;
2050 ((struct symloc *) subpst->read_symtab_private)->numsyms = 0;
2051 subpst->textlow = 0;
2052 subpst->texthigh = 0;
2054 /* We could save slight bits of space by only making one of these,
2055 shared by the entire set of include files. FIXME-someday. */
2056 subpst->dependencies = (struct partial_symtab **)
2057 obstack_alloc (&objfile->psymbol_obstack,
2058 sizeof (struct partial_symtab *));
2059 subpst->dependencies[0] = pst;
2060 subpst->number_of_dependencies = 1;
2062 subpst->globals_offset =
2063 subpst->n_global_syms =
2064 subpst->statics_offset =
2065 subpst->n_static_syms = 0;
2069 subpst->read_symtab = pst->read_symtab;
2072 sort_pst_symbols (pst);
2074 /* If there is already a psymtab or symtab for a file of this name,
2075 remove it. (If there is a symtab, more drastic things also
2076 happen.) This happens in VxWorks. */
2077 free_named_symtabs (pst->filename);
2079 if (num_includes == 0
2080 && number_dependencies == 0
2081 && pst->n_global_syms == 0
2082 && pst->n_static_syms == 0)
2084 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2085 it is on the obstack, but we can forget to chain it on the list. */
2086 /* Empty psymtabs happen as a result of header files which don't have
2087 any symbols in them. There can be a lot of them. */
2089 discard_psymtab (pst);
2091 /* Indicate that psymtab was thrown away. */
2092 pst = (struct partial_symtab *) NULL;
2097 static void swap_sym (struct internal_syment *,
2098 union internal_auxent *, char **, char **,
2099 unsigned int *, struct objfile *);
2101 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2102 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2103 the symbol and its auxents. */
2106 swap_sym (struct internal_syment *symbol, union internal_auxent *aux,
2107 char **name, char **raw, unsigned int *symnump,
2108 struct objfile *objfile)
2110 bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
2111 if (symbol->n_zeroes)
2113 /* If it's exactly E_SYMNMLEN characters long it isn't
2115 if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
2117 /* FIXME: wastes memory for symbols which we don't end up putting
2118 into the minimal symbols. */
2120 p = obstack_alloc (&objfile->psymbol_obstack, E_SYMNMLEN + 1);
2121 strncpy (p, symbol->n_name, E_SYMNMLEN);
2122 p[E_SYMNMLEN] = '\0';
2126 /* Point to the unswapped name as that persists as long as the
2128 *name = ((struct external_syment *) *raw)->e.e_name;
2130 else if (symbol->n_sclass & 0x80)
2132 *name = ((struct coff_symfile_info *) objfile->sym_private)->debugsec
2137 *name = ((struct coff_symfile_info *) objfile->sym_private)->strtbl
2141 *raw += coff_data (objfile->obfd)->local_symesz;
2142 if (symbol->n_numaux > 0)
2144 bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
2145 symbol->n_sclass, 0, symbol->n_numaux, aux);
2147 *symnump += symbol->n_numaux;
2148 *raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
2153 scan_xcoff_symtab (struct objfile *objfile)
2155 CORE_ADDR toc_offset = 0; /* toc offset value in data section. */
2156 char *filestring = NULL;
2159 int past_first_source_file = 0;
2164 /* Current partial symtab */
2165 struct partial_symtab *pst;
2167 /* List of current psymtab's include files */
2168 char **psymtab_include_list;
2169 int includes_allocated;
2172 /* Index within current psymtab dependency list */
2173 struct partial_symtab **dependency_list;
2174 int dependencies_used, dependencies_allocated;
2177 struct internal_syment symbol;
2178 union internal_auxent main_aux[5];
2179 unsigned int ssymnum;
2181 char *last_csect_name = NULL; /* last seen csect's name and value */
2182 CORE_ADDR last_csect_val = 0;
2183 int last_csect_sec = 0;
2184 int misc_func_recorded = 0; /* true if any misc. function */
2185 int textlow_not_set = 1;
2187 pst = (struct partial_symtab *) 0;
2189 includes_allocated = 30;
2191 psymtab_include_list = (char **) alloca (includes_allocated *
2194 dependencies_allocated = 30;
2195 dependencies_used = 0;
2197 (struct partial_symtab **) alloca (dependencies_allocated *
2198 sizeof (struct partial_symtab *));
2200 last_source_file = NULL;
2202 abfd = objfile->obfd;
2204 sraw_symbol = ((struct coff_symfile_info *) objfile->sym_private)->symtbl;
2205 nsyms = ((struct coff_symfile_info *) objfile->sym_private)->symtbl_num_syms;
2207 while (ssymnum < nsyms)
2210 /* This is the type we pass to partial-stab.h. A less kludgy solution
2211 would be to break out partial-stab.h into its various parts--shuffle
2212 off the DBXREAD_ONLY stuff to dbxread.c, and make separate
2213 pstab-norm.h (for most types), pstab-sol.h (for N_SOL), etc. */
2218 bfd_coff_swap_sym_in (abfd, sraw_symbol, &symbol);
2219 sclass = symbol.n_sclass;
2226 /* The CSECT auxent--always the last auxent. */
2227 union internal_auxent csect_aux;
2228 unsigned int symnum_before = ssymnum;
2230 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2232 if (symbol.n_numaux > 1)
2234 bfd_coff_swap_aux_in
2236 sraw_symbol - coff_data (abfd)->local_symesz,
2239 symbol.n_numaux - 1,
2244 csect_aux = main_aux[0];
2246 /* If symbol name starts with ".$" or "$", ignore it. */
2247 if (namestring[0] == '$'
2248 || (namestring[0] == '.' && namestring[1] == '$'))
2251 switch (csect_aux.x_csect.x_smtyp & 0x7)
2254 switch (csect_aux.x_csect.x_smclas)
2257 if (last_csect_name)
2259 /* If no misc. function recorded in the last
2260 seen csect, enter it as a function. This
2261 will take care of functions like strcmp()
2264 if (!misc_func_recorded)
2266 RECORD_MINIMAL_SYMBOL
2267 (last_csect_name, last_csect_val,
2268 mst_text, last_csect_sec,
2274 /* We have to allocate one psymtab for
2275 each program csect, because their text
2276 sections need not be adjacent. */
2278 (pst, psymtab_include_list, includes_used,
2279 symnum_before, dependency_list,
2280 dependencies_used, textlow_not_set);
2282 dependencies_used = 0;
2283 /* Give all psymtabs for this source file the same
2285 pst = xcoff_start_psymtab
2289 objfile->global_psymbols.next,
2290 objfile->static_psymbols.next);
2293 if (namestring && namestring[0] == '.')
2295 last_csect_name = namestring;
2296 last_csect_val = symbol.n_value;
2298 secnum_to_section (symbol.n_scnum, objfile);
2303 symbol.n_value + csect_aux.x_csect.x_scnlen.l;
2304 if (highval > pst->texthigh)
2305 pst->texthigh = highval;
2306 if (pst->textlow == 0 || symbol.n_value < pst->textlow)
2307 pst->textlow = symbol.n_value;
2309 misc_func_recorded = 0;
2313 /* Data variables are recorded in the minimal symbol
2314 table, except for section symbols. */
2315 if (*namestring != '.')
2316 prim_record_minimal_symbol_and_info
2317 (namestring, symbol.n_value,
2318 sclass == C_HIDEXT ? mst_file_data : mst_data,
2319 NULL, secnum_to_section (symbol.n_scnum, objfile),
2325 warning ("More than one XMC_TC0 symbol found.");
2326 toc_offset = symbol.n_value;
2328 /* Make TOC offset relative to start address of section. */
2329 bfd_sect = secnum_to_bfd_section (symbol.n_scnum, objfile);
2331 toc_offset -= bfd_section_vma (objfile->obfd, bfd_sect);
2335 /* These symbols tell us where the TOC entry for a
2336 variable is, not the variable itself. */
2345 switch (csect_aux.x_csect.x_smclas)
2348 /* A function entry point. */
2350 if (first_fun_line_offset == 0 && symbol.n_numaux > 1)
2351 first_fun_line_offset =
2352 main_aux[0].x_sym.x_fcnary.x_fcn.x_lnnoptr;
2353 RECORD_MINIMAL_SYMBOL
2354 (namestring, symbol.n_value,
2355 sclass == C_HIDEXT ? mst_file_text : mst_text,
2356 secnum_to_section (symbol.n_scnum, objfile),
2361 /* shared library function trampoline code entry
2364 /* record trampoline code entries as
2365 mst_solib_trampoline symbol. When we lookup mst
2366 symbols, we will choose mst_text over
2367 mst_solib_trampoline. */
2368 RECORD_MINIMAL_SYMBOL
2369 (namestring, symbol.n_value,
2370 mst_solib_trampoline,
2371 secnum_to_section (symbol.n_scnum, objfile),
2376 /* The symbols often have the same names as
2377 debug symbols for functions, and confuse
2383 /* xlc puts each variable in a separate csect,
2384 so we get an XTY_SD for each variable. But
2385 gcc puts several variables in a csect, so
2386 that each variable only gets an XTY_LD. We
2387 still need to record them. This will
2388 typically be XMC_RW; I suspect XMC_RO and
2389 XMC_BS might be possible too. */
2390 if (*namestring != '.')
2391 prim_record_minimal_symbol_and_info
2392 (namestring, symbol.n_value,
2393 sclass == C_HIDEXT ? mst_file_data : mst_data,
2394 NULL, secnum_to_section (symbol.n_scnum, objfile),
2401 switch (csect_aux.x_csect.x_smclas)
2405 /* Common variables are recorded in the minimal symbol
2406 table, except for section symbols. */
2407 if (*namestring != '.')
2408 prim_record_minimal_symbol_and_info
2409 (namestring, symbol.n_value,
2410 sclass == C_HIDEXT ? mst_file_bss : mst_bss,
2411 NULL, secnum_to_section (symbol.n_scnum, objfile),
2424 unsigned int symnum_before;
2426 symnum_before = ssymnum;
2427 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2430 /* See if the last csect needs to be recorded. */
2432 if (last_csect_name && !misc_func_recorded)
2435 /* If no misc. function recorded in the last seen csect, enter
2436 it as a function. This will take care of functions like
2437 strcmp() compiled by xlc. */
2439 RECORD_MINIMAL_SYMBOL
2440 (last_csect_name, last_csect_val,
2441 mst_text, last_csect_sec, objfile);
2446 xcoff_end_psymtab (pst, psymtab_include_list, includes_used,
2447 symnum_before, dependency_list,
2448 dependencies_used, textlow_not_set);
2450 dependencies_used = 0;
2452 first_fun_line_offset = 0;
2454 /* XCOFF, according to the AIX 3.2 documentation, puts the
2455 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2456 do things the standard COFF way and put it in the auxent.
2457 We use the auxent if the symbol is ".file" and an auxent
2458 exists, otherwise use the symbol itself. */
2459 if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
2461 filestring = coff_getfilename (&main_aux[0], objfile);
2464 filestring = namestring;
2466 pst = xcoff_start_psymtab (objfile,
2469 objfile->global_psymbols.next,
2470 objfile->static_psymbols.next);
2471 last_csect_name = NULL;
2477 static struct complaint msg =
2478 {"Storage class %d not recognized during scan", 0, 0};
2479 complain (&msg, sclass);
2483 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2484 to handle only the C_FUN and C_EXT. */
2499 /* C_EINCL means we are switching back to the main file. But there
2500 is no reason to care; the only thing we want to know about
2501 includes is the names of all the included (.h) files. */
2506 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2510 /* I don't think the name of the common block (as opposed to the
2511 variables within it) is something which is user visible
2519 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2520 so C_LSYM would appear to be only for locals. */
2526 /* We probably could save a few instructions by assuming that
2527 C_LSYM, C_PSYM, etc., never have auxents. */
2528 int naux1 = symbol.n_numaux + 1;
2530 sraw_symbol += bfd_coff_symesz (abfd) * naux1;
2539 /* The value of the C_FUN is not the address of the function (it
2540 appears to be the address before linking), but as long as it
2541 is smaller than the actual address, then find_pc_partial_function
2542 will use the minimal symbols instead. I hope. */
2550 swap_sym (&symbol, &main_aux[0], &namestring, &sraw_symbol,
2552 #define CUR_SYMBOL_TYPE stype
2553 #define CUR_SYMBOL_VALUE symbol.n_value
2555 /* START_PSYMTAB and END_PSYMTAB are never used, because they are only
2556 called from DBXREAD_ONLY or N_SO code. Likewise for the symnum
2558 #define START_PSYMTAB(ofile,fname,low,symoff,global_syms,static_syms) 0
2559 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
2561 /* We have already set the namestring. */
2562 #define SET_NAMESTRING() /* */
2564 #include "partial-stab.h"
2570 xcoff_end_psymtab (pst, psymtab_include_list, includes_used,
2571 ssymnum, dependency_list,
2572 dependencies_used, textlow_not_set);
2575 /* Record the toc offset value of this symbol table into objfile structure.
2576 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
2577 this information would be file auxiliary header. */
2579 ((struct coff_symfile_info *) objfile->sym_private)->toc_offset = toc_offset;
2582 /* Return the toc offset value for a given objfile. */
2585 get_toc_offset (struct objfile *objfile)
2588 return ((struct coff_symfile_info *) objfile->sym_private)->toc_offset;
2592 /* Scan and build partial symbols for a symbol file.
2593 We have been initialized by a call to dbx_symfile_init, which
2594 put all the relevant info into a "struct dbx_symfile_info",
2595 hung off the objfile structure.
2597 SECTION_OFFSETS contains offsets relative to which the symbols in the
2598 various sections are (depending where the sections were actually loaded).
2599 MAINLINE is true if we are reading the main symbol
2600 table (as opposed to a shared lib or dynamically loaded file). */
2603 xcoff_initial_scan (struct objfile *objfile, int mainline)
2607 struct cleanup *back_to;
2608 int num_symbols; /* # of symbols */
2609 file_ptr symtab_offset; /* symbol table and */
2610 file_ptr stringtab_offset; /* string table file offsets */
2611 struct coff_symfile_info *info;
2615 info = (struct coff_symfile_info *) objfile->sym_private;
2616 symfile_bfd = abfd = objfile->obfd;
2617 name = objfile->name;
2619 num_symbols = bfd_get_symcount (abfd); /* # of symbols */
2620 symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
2621 stringtab_offset = symtab_offset +
2622 num_symbols * coff_data (abfd)->local_symesz;
2624 info->min_lineno_offset = 0;
2625 info->max_lineno_offset = 0;
2626 bfd_map_over_sections (abfd, find_linenos, info);
2628 if (num_symbols > 0)
2630 /* Read the string table. */
2631 init_stringtab (abfd, stringtab_offset, objfile);
2633 /* Read the .debug section, if present. */
2636 bfd_size_type length;
2637 char *debugsec = NULL;
2639 secp = bfd_get_section_by_name (abfd, ".debug");
2642 length = bfd_section_size (abfd, secp);
2646 (char *) obstack_alloc (&objfile->symbol_obstack, length);
2648 if (!bfd_get_section_contents (abfd, secp, debugsec,
2649 (file_ptr) 0, length))
2651 error ("Error reading .debug section of `%s': %s",
2652 name, bfd_errmsg (bfd_get_error ()));
2656 ((struct coff_symfile_info *) objfile->sym_private)->debugsec =
2661 /* Read the symbols. We keep them in core because we will want to
2662 access them randomly in read_symbol*. */
2663 val = bfd_seek (abfd, symtab_offset, SEEK_SET);
2665 error ("Error reading symbols from %s: %s",
2666 name, bfd_errmsg (bfd_get_error ()));
2667 size = coff_data (abfd)->local_symesz * num_symbols;
2668 ((struct coff_symfile_info *) objfile->sym_private)->symtbl =
2669 obstack_alloc (&objfile->symbol_obstack, size);
2670 ((struct coff_symfile_info *) objfile->sym_private)->symtbl_num_syms =
2673 val = bfd_read (((struct coff_symfile_info *) objfile->sym_private)->symtbl,
2676 perror_with_name ("reading symbol table");
2678 /* If we are reinitializing, or if we have never loaded syms yet, init */
2680 || objfile->global_psymbols.size == 0
2681 || objfile->static_psymbols.size == 0)
2682 /* I'm not sure how how good num_symbols is; the rule of thumb in
2683 init_psymbol_list was developed for a.out. On the one hand,
2684 num_symbols includes auxents. On the other hand, it doesn't
2686 init_psymbol_list (objfile, num_symbols);
2688 free_pending_blocks ();
2689 back_to = make_cleanup (really_free_pendings, 0);
2691 init_minimal_symbol_collection ();
2692 make_cleanup_discard_minimal_symbols ();
2694 /* Now that the symbol table data of the executable file are all in core,
2695 process them and define symbols accordingly. */
2697 scan_xcoff_symtab (objfile);
2699 /* Install any minimal symbols that have been collected as the current
2700 minimal symbols for this objfile. */
2702 install_minimal_symbols (objfile);
2704 do_cleanups (back_to);
2708 xcoff_symfile_offsets (struct objfile *objfile, struct section_addr_info *addrs)
2710 asection *sect = NULL;
2713 objfile->num_sections = SECT_OFF_MAX;
2714 objfile->section_offsets = (struct section_offsets *)
2715 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
2717 /* Initialize the section indexes for future use. */
2718 sect = bfd_get_section_by_name (objfile->obfd, ".text");
2720 objfile->sect_index_text = sect->index;
2722 sect = bfd_get_section_by_name (objfile->obfd, ".data");
2724 objfile->sect_index_data = sect->index;
2726 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
2728 objfile->sect_index_bss = sect->index;
2730 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
2732 objfile->sect_index_rodata = sect->index;
2734 for (i = 0; i < objfile->num_sections; ++i)
2736 /* syms_from_objfile kindly subtracts from addr the
2737 bfd_section_vma of the .text section. This strikes me as
2738 wrong--whether the offset to be applied to symbol reading is
2739 relative to the start address of the section depends on the
2740 symbol format. In any event, this whole "addr" concept is
2741 pretty broken (it doesn't handle any section but .text
2742 sensibly), so just ignore the addr parameter and use 0.
2743 rs6000-nat.c will set the correct section offsets via
2744 objfile_relocate. */
2745 (objfile->section_offsets)->offsets[i] = 0;
2749 /* Register our ability to parse symbols for xcoff BFD files. */
2751 static struct sym_fns xcoff_sym_fns =
2754 /* It is possible that coff and xcoff should be merged as
2755 they do have fundamental similarities (for example, the extra storage
2756 classes used for stabs could presumably be recognized in any COFF file).
2757 However, in addition to obvious things like all the csect hair, there are
2758 some subtler differences between xcoffread.c and coffread.c, notably
2759 the fact that coffread.c has no need to read in all the symbols, but
2760 xcoffread.c reads all the symbols and does in fact randomly access them
2761 (in C_BSTAT and line number processing). */
2763 bfd_target_xcoff_flavour,
2765 xcoff_new_init, /* sym_new_init: init anything gbl to entire symtab */
2766 xcoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */
2767 xcoff_initial_scan, /* sym_read: read a symbol file into symtab */
2768 xcoff_symfile_finish, /* sym_finish: finished with file, cleanup */
2769 xcoff_symfile_offsets, /* sym_offsets: xlate offsets ext->int form */
2770 NULL /* next: pointer to next struct sym_fns */
2774 _initialize_xcoffread (void)
2776 add_symtab_fns (&xcoff_sym_fns);
2778 func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0,
2779 "<function, no debug info>", NULL);
2780 TYPE_TARGET_TYPE (func_symbol_type) = builtin_type_int;
2782 init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0,
2783 "<variable, no debug info>", NULL);