2365 lines
66 KiB
C
2365 lines
66 KiB
C
/* Read AIX xcoff symbol tables and convert to internal format, for GDB.
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Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992
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Free Software Foundation, Inc.
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Derived from coffread.c, dbxread.c, and a lot of hacking.
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Contributed by IBM Corporation.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "bfd.h"
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#if defined(IBM6000_HOST) && defined(IBM6000_TARGET)
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/* Native only: Need struct tbtable in <sys/debug.h> from host, and
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need xcoff_add_toc_to_loadinfo in rs6000-tdep.c from target. */
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/* AIX XCOFF names have a preceeding dot `.' */
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#define NAMES_HAVE_DOT 1
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#include <sys/types.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include "obstack.h"
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#include <sys/param.h>
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#ifndef NO_SYS_FILE
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#include <sys/file.h>
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#endif
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#include <sys/stat.h>
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#include <sys/debug.h>
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "buildsym.h"
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#include "stabsread.h"
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#include "gdb-stabs.h"
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#include "coff/internal.h" /* FIXME, internal data from BFD */
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#include "libcoff.h" /* FIXME, internal data from BFD */
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#include "coff/rs6000.h" /* FIXME, raw file-format guts of xcoff */
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/* Define this if you want gdb use the old xcoff symbol processing. This
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way it won't use common `define_symbol()' function and Sun dbx stab
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string grammar. And likely it won't be able to do G++ debugging. */
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/* #define NO_DEFINE_SYMBOL 1 */
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/* Define this if you want gdb to ignore typdef stabs. This was needed for
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one of Transarc, to reduce the size of the symbol table. Types won't be
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recognized, but tag names will be. */
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/* #define NO_TYPEDEFS 1 */
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/* Simplified internal version of coff symbol table information */
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struct coff_symbol {
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char *c_name;
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int c_symnum; /* symbol number of this entry */
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int c_nsyms; /* 0 if syment only, 1 if syment + auxent */
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long c_value;
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int c_sclass;
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int c_secnum;
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unsigned int c_type;
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};
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/* The COFF line table, in raw form. */
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static char *linetab = NULL; /* Its actual contents */
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static long linetab_offset; /* Its offset in the file */
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static unsigned long linetab_size; /* Its size */
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/* last function's saved coff symbol `cs' */
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static struct coff_symbol fcn_cs_saved;
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static bfd *symfile_bfd;
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/* Core address of start and end of text of current source file.
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This is calculated from the first function seen after a C_FILE
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symbol. */
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static CORE_ADDR cur_src_end_addr;
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/* Core address of the end of the first object file. */
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static CORE_ADDR first_object_file_end;
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/* pointer to the string table */
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static char *strtbl;
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/* length of the string table */
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static int strtbl_len;
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/* pointer to debug section */
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static char *debugsec;
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/* pointer to the a.out symbol table */
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static char *symtbl;
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/* initial symbol-table-debug-string vector length */
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#define INITIAL_STABVECTOR_LENGTH 40
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/* Nonzero if within a function (so symbols should be local,
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if nothing says specifically). */
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int within_function;
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/* Local variables that hold the shift and mask values for the
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COFF file that we are currently reading. These come back to us
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from BFD, and are referenced by their macro names, as well as
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internally to the BTYPE, ISPTR, ISFCN, ISARY, ISTAG, and DECREF
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macros from ../internalcoff.h . */
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static unsigned local_n_btshft;
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static unsigned local_n_tmask;
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#undef N_BTSHFT
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#define N_BTSHFT local_n_btshft
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#undef N_TMASK
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#define N_TMASK local_n_tmask
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/* Local variables that hold the sizes in the file of various COFF structures.
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(We only need to know this to read them from the file -- BFD will then
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translate the data in them, into `internal_xxx' structs in the right
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byte order, alignment, etc.) */
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static unsigned local_symesz;
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/* coff_symfile_init()
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is the coff-specific initialization routine for reading symbols.
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It is passed a struct sym_fns which contains, among other things,
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the BFD for the file whose symbols are being read, and a slot for
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a pointer to "private data" which we fill with cookies and other
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treats for coff_symfile_read().
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We will only be called if this is a COFF or COFF-like file.
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BFD handles figuring out the format of the file, and code in symtab.c
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uses BFD's determination to vector to us.
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The ultimate result is a new symtab (or, FIXME, eventually a psymtab). */
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struct coff_symfile_info {
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file_ptr min_lineno_offset; /* Where in file lowest line#s are */
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file_ptr max_lineno_offset; /* 1+last byte of line#s in file */
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};
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static void
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enter_line_range PARAMS ((struct subfile *, unsigned, unsigned,
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CORE_ADDR, CORE_ADDR, unsigned *));
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static void
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free_debugsection PARAMS ((void));
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static int
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init_debugsection PARAMS ((bfd *));
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static int
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init_stringtab PARAMS ((bfd *, file_ptr, struct objfile *));
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static void
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xcoff_symfile_init PARAMS ((struct objfile *));
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static void
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xcoff_new_init PARAMS ((struct objfile *));
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#ifdef __STDC__
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struct section_offset;
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#endif
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static void
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xcoff_symfile_read PARAMS ((struct objfile *, struct section_offset *, int));
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static void
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xcoff_symfile_finish PARAMS ((struct objfile *));
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static struct section_offsets *
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xcoff_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR));
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static int
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init_lineno PARAMS ((bfd *, file_ptr, int));
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static void
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find_linenos PARAMS ((bfd *, sec_ptr, PTR));
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static int
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read_symbol_lineno PARAMS ((char *, int));
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static int
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read_symbol_nvalue PARAMS ((char *, int));
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static struct symbol *
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process_xcoff_symbol PARAMS ((struct coff_symbol *, struct objfile *));
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static void
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read_xcoff_symtab PARAMS ((struct objfile *, int));
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static void
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add_stab_to_list PARAMS ((char *, struct pending_stabs **));
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static void
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sort_syms PARAMS ((void));
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static int
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compare_symbols PARAMS ((const void *, const void *));
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/* Call sort_syms to sort alphabetically
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the symbols of each block of each symtab. */
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static int
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compare_symbols (s1p, s2p)
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const PTR s1p;
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const PTR s2p;
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{
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/* Names that are less should come first. */
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register struct symbol **s1 = (struct symbol **) s1p;
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register struct symbol **s2 = (struct symbol **) s2p;
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register int namediff = strcmp (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2));
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if (namediff != 0)
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return namediff;
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/* For symbols of the same name, registers should come first. */
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return ((SYMBOL_CLASS (*s2) == LOC_REGISTER)
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- (SYMBOL_CLASS (*s1) == LOC_REGISTER));
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}
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/* Sort a vector of symbols by their value. */
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static void
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sort_syms ()
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{
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register struct symtab *s;
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register struct objfile *objfile;
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register int i, nbl;
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register struct blockvector *bv;
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register struct block *b;
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for (objfile = object_files; objfile != NULL; objfile = objfile -> next)
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{
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for (s = objfile -> symtabs; s != NULL; s = s -> next)
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{
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bv = BLOCKVECTOR (s);
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nbl = BLOCKVECTOR_NBLOCKS (bv);
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for (i = 0; i < nbl; i++)
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{
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b = BLOCKVECTOR_BLOCK (bv, i);
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if (BLOCK_SHOULD_SORT (b))
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{
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qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
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sizeof (struct symbol *), compare_symbols);
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}
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}
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}
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}
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}
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/* add a given stab string into given stab vector. */
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static void
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add_stab_to_list (stabname, stabvector)
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char *stabname;
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struct pending_stabs **stabvector;
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{
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if ( *stabvector == NULL) {
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*stabvector = (struct pending_stabs *)
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xmalloc (sizeof (struct pending_stabs) +
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INITIAL_STABVECTOR_LENGTH * sizeof (char*));
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(*stabvector)->count = 0;
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(*stabvector)->length = INITIAL_STABVECTOR_LENGTH;
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}
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else if ((*stabvector)->count >= (*stabvector)->length) {
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(*stabvector)->length += INITIAL_STABVECTOR_LENGTH;
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*stabvector = (struct pending_stabs *)
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xrealloc ((char *) *stabvector, sizeof (struct pending_stabs) +
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(*stabvector)->length * sizeof (char*));
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}
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(*stabvector)->stab [(*stabvector)->count++] = stabname;
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}
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#if 0
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/* for all the stabs in a given stab vector, build appropriate types
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and fix their symbols in given symbol vector. */
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void
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patch_block_stabs (symbols, stabs)
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struct pending *symbols;
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struct pending_stabs *stabs;
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{
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int ii;
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if (!stabs)
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return;
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/* for all the stab entries, find their corresponding symbols and
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patch their types! */
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for (ii=0; ii < stabs->count; ++ii) {
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char *name = stabs->stab[ii];
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char *pp = (char*) index (name, ':');
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struct symbol *sym = find_symbol_in_list (symbols, name, pp-name);
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if (!sym) {
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;
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/* printf ("ERROR! stab symbol not found!\n"); */ /* FIXME */
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/* The above is a false alarm. There are cases the we can have
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a stab, without its symbol. xlc generates this for the extern
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definitions in inner blocks. */
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}
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else {
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pp += 2;
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if (*(pp-1) == 'F' || *(pp-1) == 'f')
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SYMBOL_TYPE (sym) = lookup_function_type (read_type (&pp));
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else
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SYMBOL_TYPE (sym) = read_type (&pp, objfile);
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}
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}
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}
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#endif
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/* compare line table entry addresses. */
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static int
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compare_lte (lte1, lte2)
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struct linetable_entry *lte1, *lte2;
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{
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return lte1->pc - lte2->pc;
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}
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/* Give a line table with function entries are marked, arrange its functions
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in assending order and strip off function entry markers and return it in
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a newly created table. If the old one is good enough, return the old one. */
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static struct linetable *
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arrange_linetable (oldLineTb)
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struct linetable *oldLineTb; /* old linetable */
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{
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int ii, jj,
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newline, /* new line count */
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function_count; /* # of functions */
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struct linetable_entry *fentry; /* function entry vector */
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int fentry_size; /* # of function entries */
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struct linetable *newLineTb; /* new line table */
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#define NUM_OF_FUNCTIONS 20
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fentry_size = NUM_OF_FUNCTIONS;
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fentry = (struct linetable_entry*)
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malloc (fentry_size * sizeof (struct linetable_entry));
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for (function_count=0, ii=0; ii <oldLineTb->nitems; ++ii) {
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if (oldLineTb->item[ii].line == 0) { /* function entry found. */
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if (function_count >= fentry_size) { /* make sure you have room. */
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fentry_size *= 2;
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fentry = (struct linetable_entry*)
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realloc (fentry, fentry_size * sizeof (struct linetable_entry));
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}
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fentry[function_count].line = ii;
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fentry[function_count].pc = oldLineTb->item[ii].pc;
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++function_count;
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}
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}
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if (function_count == 0) {
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free (fentry);
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return oldLineTb;
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}
|
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else if (function_count > 1)
|
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qsort (fentry, function_count, sizeof(struct linetable_entry), compare_lte);
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|
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/* allocate a new line table. */
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newLineTb = (struct linetable*) malloc (sizeof (struct linetable) +
|
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(oldLineTb->nitems - function_count) * sizeof (struct linetable_entry));
|
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|
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/* if line table does not start with a function beginning, copy up until
|
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a function begin. */
|
||
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newline = 0;
|
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if (oldLineTb->item[0].line != 0)
|
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for (newline=0;
|
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newline < oldLineTb->nitems && oldLineTb->item[newline].line; ++newline)
|
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newLineTb->item[newline] = oldLineTb->item[newline];
|
||
|
||
/* Now copy function lines one by one. */
|
||
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||
for (ii=0; ii < function_count; ++ii) {
|
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for (jj = fentry[ii].line + 1;
|
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jj < oldLineTb->nitems && oldLineTb->item[jj].line != 0;
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++jj, ++newline)
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newLineTb->item[newline] = oldLineTb->item[jj];
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||
}
|
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free (fentry);
|
||
newLineTb->nitems = oldLineTb->nitems - function_count;
|
||
return newLineTb;
|
||
}
|
||
|
||
|
||
|
||
/* We try to detect the beginning of a compilation unit. That info will
|
||
be used as an entry in line number recording routines (enter_line_range) */
|
||
|
||
static unsigned first_fun_line_offset;
|
||
static unsigned first_fun_bf;
|
||
|
||
#define mark_first_line(OFFSET, SYMNUM) \
|
||
if (!first_fun_line_offset) { \
|
||
first_fun_line_offset = OFFSET; \
|
||
first_fun_bf = SYMNUM; \
|
||
}
|
||
|
||
|
||
/* include file support: C_BINCL/C_EINCL pairs will be kept in the
|
||
following `IncludeChain'. At the end of each symtab (end_symtab),
|
||
we will determine if we should create additional symtab's to
|
||
represent if (the include files. */
|
||
|
||
|
||
typedef struct _inclTable {
|
||
char *name; /* include filename */
|
||
int begin, end; /* offsets to the line table */
|
||
struct subfile *subfile;
|
||
unsigned funStartLine; /* start line # of its function */
|
||
} InclTable;
|
||
|
||
#define INITIAL_INCLUDE_TABLE_LENGTH 20
|
||
static InclTable *inclTable; /* global include table */
|
||
static int inclIndx; /* last entry to table */
|
||
static int inclLength; /* table length */
|
||
static int inclDepth; /* nested include depth */
|
||
|
||
|
||
static void
|
||
record_include_begin (cs)
|
||
struct coff_symbol *cs;
|
||
{
|
||
/* In xcoff, we assume include files cannot be nested (not in .c files
|
||
of course, but in corresponding .s files.) */
|
||
|
||
if (inclDepth)
|
||
fatal ("xcoff internal: pending include file exists.");
|
||
|
||
++inclDepth;
|
||
|
||
/* allocate an include file, or make room for the new entry */
|
||
if (inclLength == 0) {
|
||
inclTable = (InclTable*)
|
||
xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
|
||
bzero (inclTable, sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
|
||
inclLength = INITIAL_INCLUDE_TABLE_LENGTH;
|
||
inclIndx = 0;
|
||
}
|
||
else if (inclIndx >= inclLength) {
|
||
inclLength += INITIAL_INCLUDE_TABLE_LENGTH;
|
||
inclTable = (InclTable*)
|
||
xrealloc (inclTable, sizeof (InclTable) * inclLength);
|
||
bzero (inclTable+inclLength-INITIAL_INCLUDE_TABLE_LENGTH,
|
||
sizeof (InclTable)*INITIAL_INCLUDE_TABLE_LENGTH);
|
||
}
|
||
|
||
inclTable [inclIndx].name = cs->c_name;
|
||
inclTable [inclIndx].begin = cs->c_value;
|
||
}
|
||
|
||
|
||
static void
|
||
record_include_end (cs)
|
||
struct coff_symbol *cs;
|
||
{
|
||
InclTable *pTbl;
|
||
|
||
if (inclDepth == 0)
|
||
fatal ("xcoff internal: Mismatch C_BINCL/C_EINCL pair found.");
|
||
|
||
pTbl = &inclTable [inclIndx];
|
||
pTbl->end = cs->c_value;
|
||
|
||
--inclDepth;
|
||
++inclIndx;
|
||
}
|
||
|
||
|
||
/* given the start and end addresses of a compilation unit (or a csect, at times)
|
||
process its lines and create appropriate line vectors. */
|
||
|
||
static void
|
||
process_linenos (start, end)
|
||
CORE_ADDR start, end;
|
||
{
|
||
char *pp;
|
||
int offset, ii;
|
||
|
||
struct subfile main_subfile; /* subfile structure for the main
|
||
compilation unit. */
|
||
|
||
/* in the main source file, any time we see a function entry, we reset
|
||
this variable to function's absolute starting line number. All the
|
||
following line numbers in the function are relative to this, and
|
||
we record absolute line numbers in record_line(). */
|
||
|
||
int main_source_baseline = 0;
|
||
|
||
|
||
unsigned *firstLine;
|
||
CORE_ADDR addr;
|
||
|
||
if (!(offset = first_fun_line_offset))
|
||
goto return_after_cleanup;
|
||
|
||
bzero (&main_subfile, sizeof (main_subfile));
|
||
first_fun_line_offset = 0;
|
||
|
||
if (inclIndx == 0)
|
||
/* All source lines were in the main source file. None in include files. */
|
||
|
||
enter_line_range (&main_subfile, offset, 0, start, end,
|
||
&main_source_baseline);
|
||
|
||
/* else, there was source with line numbers in include files */
|
||
else {
|
||
|
||
main_source_baseline = 0;
|
||
for (ii=0; ii < inclIndx; ++ii) {
|
||
|
||
struct subfile *tmpSubfile;
|
||
|
||
/* if there is main file source before include file, enter it. */
|
||
if (offset < inclTable[ii].begin) {
|
||
enter_line_range
|
||
(&main_subfile, offset, inclTable[ii].begin - LINESZ, start, 0,
|
||
&main_source_baseline);
|
||
}
|
||
|
||
/* Have a new subfile for the include file */
|
||
|
||
tmpSubfile = inclTable[ii].subfile = (struct subfile*)
|
||
xmalloc (sizeof (struct subfile));
|
||
|
||
bzero (tmpSubfile, sizeof (struct subfile));
|
||
firstLine = &(inclTable[ii].funStartLine);
|
||
|
||
/* enter include file's lines now. */
|
||
enter_line_range (tmpSubfile, inclTable[ii].begin,
|
||
inclTable[ii].end, start, 0, firstLine);
|
||
|
||
offset = inclTable[ii].end + LINESZ;
|
||
}
|
||
|
||
/* all the include files' line have been processed at this point. Now,
|
||
enter remaining lines of the main file, if any left. */
|
||
if (offset < (linetab_offset + linetab_size + 1 - LINESZ)) {
|
||
enter_line_range (&main_subfile, offset, 0, start, end,
|
||
&main_source_baseline);
|
||
}
|
||
}
|
||
|
||
/* Process main file's line numbers. */
|
||
if (main_subfile.line_vector) {
|
||
struct linetable *lineTb, *lv;
|
||
|
||
lv = main_subfile.line_vector;
|
||
|
||
/* Line numbers are not necessarily ordered. xlc compilation will
|
||
put static function to the end. */
|
||
|
||
lineTb = arrange_linetable (lv);
|
||
if (lv == lineTb) {
|
||
current_subfile->line_vector = (struct linetable *)
|
||
xrealloc (lv, (sizeof (struct linetable)
|
||
+ lv->nitems * sizeof (struct linetable_entry)));
|
||
|
||
}
|
||
else {
|
||
free (lv);
|
||
current_subfile->line_vector = lineTb;
|
||
}
|
||
|
||
current_subfile->line_vector_length =
|
||
current_subfile->line_vector->nitems;
|
||
}
|
||
|
||
/* Now, process included files' line numbers. */
|
||
|
||
for (ii=0; ii < inclIndx; ++ii) {
|
||
|
||
if ( (inclTable[ii].subfile)->line_vector) { /* Useless if!!! FIXMEmgo */
|
||
struct linetable *lineTb, *lv;
|
||
|
||
lv = (inclTable[ii].subfile)->line_vector;
|
||
|
||
/* Line numbers are not necessarily ordered. xlc compilation will
|
||
put static function to the end. */
|
||
|
||
lineTb = arrange_linetable (lv);
|
||
|
||
push_subfile ();
|
||
|
||
/* For the same include file, we might want to have more than one subfile.
|
||
This happens if we have something like:
|
||
|
||
......
|
||
#include "foo.h"
|
||
......
|
||
#include "foo.h"
|
||
......
|
||
|
||
while foo.h including code in it. (stupid but possible)
|
||
Since start_subfile() looks at the name and uses an existing one if finds,
|
||
we need to provide a fake name and fool it. */
|
||
|
||
/* start_subfile (inclTable[ii].name, (char*)0); */
|
||
start_subfile (" ?", (char*)0);
|
||
current_subfile->name =
|
||
obsavestring (inclTable[ii].name, strlen (inclTable[ii].name),
|
||
¤t_objfile->symbol_obstack);
|
||
|
||
if (lv == lineTb) {
|
||
current_subfile->line_vector = (struct linetable *)
|
||
xrealloc (lv, (sizeof (struct linetable)
|
||
+ lv->nitems * sizeof (struct linetable_entry)));
|
||
|
||
}
|
||
else {
|
||
free (lv);
|
||
current_subfile->line_vector = lineTb;
|
||
}
|
||
|
||
current_subfile->line_vector_length =
|
||
current_subfile->line_vector->nitems;
|
||
start_subfile (pop_subfile (), (char*)0);
|
||
}
|
||
}
|
||
|
||
return_after_cleanup:
|
||
|
||
/* We don't want to keep alloc/free'ing the global include file table. */
|
||
inclIndx = 0;
|
||
|
||
/* start with a fresh subfile structure for the next file. */
|
||
bzero (&main_subfile, sizeof (struct subfile));
|
||
}
|
||
|
||
void
|
||
aix_process_linenos ()
|
||
{
|
||
/* process line numbers and enter them into line vector */
|
||
process_linenos (last_source_start_addr, cur_src_end_addr);
|
||
}
|
||
|
||
|
||
/* Enter a given range of lines into the line vector.
|
||
can be called in the following two ways:
|
||
enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
|
||
enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine) */
|
||
|
||
static void
|
||
enter_line_range (subfile, beginoffset, endoffset, startaddr, endaddr, firstLine)
|
||
struct subfile *subfile;
|
||
unsigned beginoffset, endoffset; /* offsets to line table */
|
||
CORE_ADDR startaddr, endaddr;
|
||
unsigned *firstLine;
|
||
{
|
||
char *pp, *limit;
|
||
CORE_ADDR addr;
|
||
|
||
/* Do Byte swapping, if needed. FIXME! */
|
||
#define P_LINENO(PP) (*(unsigned short*)((struct external_lineno*)(PP))->l_lnno)
|
||
#define P_LINEADDR(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_paddr)
|
||
#define P_LINESYM(PP) (*(long*)((struct external_lineno*)(PP))->l_addr.l_symndx)
|
||
|
||
pp = &linetab [beginoffset - linetab_offset];
|
||
limit = endoffset ? &linetab [endoffset - linetab_offset]
|
||
: &linetab [linetab_size -1];
|
||
|
||
while (pp <= limit) {
|
||
|
||
/* find the address this line represents */
|
||
addr = P_LINENO(pp) ?
|
||
P_LINEADDR(pp) : read_symbol_nvalue (symtbl, P_LINESYM(pp));
|
||
|
||
if (addr < startaddr || (endaddr && addr > endaddr))
|
||
return;
|
||
|
||
if (P_LINENO(pp) == 0) {
|
||
*firstLine = read_symbol_lineno (symtbl, P_LINESYM(pp));
|
||
record_line (subfile, 0, addr);
|
||
--(*firstLine);
|
||
}
|
||
else
|
||
record_line (subfile, *firstLine + P_LINENO(pp), addr);
|
||
|
||
pp += LINESZ;
|
||
}
|
||
}
|
||
|
||
typedef struct {
|
||
int fsize; /* file size */
|
||
int fixedparms; /* number of fixed parms */
|
||
int floatparms; /* number of float parms */
|
||
unsigned int parminfo; /* parameter info.
|
||
See /usr/include/sys/debug.h
|
||
tbtable_ext.parminfo */
|
||
int framesize; /* function frame size */
|
||
} TracebackInfo;
|
||
|
||
|
||
/* Given a function symbol, return its traceback information. */
|
||
|
||
TracebackInfo *
|
||
retrieve_tracebackinfo (abfd, textsec, cs)
|
||
bfd *abfd;
|
||
sec_ptr textsec;
|
||
struct coff_symbol *cs;
|
||
{
|
||
#define TBTABLE_BUFSIZ 2000
|
||
#define MIN_TBTABSIZ 50 /* minimum buffer size to hold a
|
||
traceback table. */
|
||
|
||
static TracebackInfo tbInfo;
|
||
struct tbtable *ptb;
|
||
|
||
static char buffer [TBTABLE_BUFSIZ];
|
||
|
||
int *pinsn;
|
||
int bytesread=0; /* total # of bytes read so far */
|
||
int bufferbytes; /* number of bytes in the buffer */
|
||
|
||
int functionstart = cs->c_value - textsec->vma;
|
||
|
||
bzero (&tbInfo, sizeof (tbInfo));
|
||
|
||
/* keep reading blocks of data from the text section, until finding a zero
|
||
word and a traceback table. */
|
||
|
||
while (
|
||
bufferbytes = (
|
||
(TBTABLE_BUFSIZ < (textsec->_raw_size - functionstart - bytesread)) ?
|
||
TBTABLE_BUFSIZ : (textsec->_raw_size - functionstart - bytesread))
|
||
|
||
&& bfd_get_section_contents (abfd, textsec, buffer,
|
||
(file_ptr)(functionstart + bytesread), bufferbytes))
|
||
{
|
||
bytesread += bufferbytes;
|
||
pinsn = (int*) buffer;
|
||
|
||
/* if this is the first time we filled the buffer, retrieve function
|
||
framesize info. */
|
||
|
||
if (bytesread == bufferbytes) {
|
||
|
||
/* skip over unrelated instructions */
|
||
|
||
if (*pinsn == 0x7c0802a6) /* mflr r0 */
|
||
++pinsn;
|
||
if ((*pinsn & 0xfc00003e) == 0x7c000026) /* mfcr Rx */
|
||
++pinsn;
|
||
if ((*pinsn & 0xfc000000) == 0x48000000) /* bl foo, save fprs */
|
||
++pinsn;
|
||
if ((*pinsn & 0xfc1f0000) == 0xbc010000) /* stm Rx, NUM(r1) */
|
||
++pinsn;
|
||
|
||
do {
|
||
int tmp = (*pinsn >> 16) & 0xffff;
|
||
|
||
if (tmp == 0x9421) { /* stu r1, NUM(r1) */
|
||
tbInfo.framesize = 0x10000 - (*pinsn & 0xffff);
|
||
break;
|
||
}
|
||
else if ((*pinsn == 0x93e1fffc) || /* st r31,-4(r1) */
|
||
(tmp == 0x9001)) /* st r0, NUM(r1) */
|
||
;
|
||
/* else, could not find a frame size. */
|
||
else
|
||
return NULL;
|
||
|
||
} while (++pinsn && *pinsn);
|
||
|
||
if (!tbInfo.framesize)
|
||
return NULL;
|
||
}
|
||
|
||
/* look for a zero word. */
|
||
|
||
while (*pinsn && (pinsn < (int*)(buffer + bufferbytes - sizeof(int))))
|
||
++pinsn;
|
||
|
||
if (pinsn >= (int*)(buffer + bufferbytes))
|
||
continue;
|
||
|
||
if (*pinsn == 0) {
|
||
|
||
/* function size is the amount of bytes we have skipped so far. */
|
||
tbInfo.fsize = bytesread - (buffer + bufferbytes - (char*)pinsn);
|
||
|
||
++pinsn;
|
||
|
||
/* if we don't have the whole traceback table in the buffer, re-read
|
||
the whole thing. */
|
||
|
||
if ((char*)pinsn > (buffer + bufferbytes - MIN_TBTABSIZ)) {
|
||
|
||
/* In case if we are *very* close to the end of the text section
|
||
and cannot read properly from that point on, abort by returning
|
||
NULL.
|
||
Handle this case more graciously -- FIXME */
|
||
|
||
if (!bfd_get_section_contents (
|
||
abfd, textsec, buffer,
|
||
(file_ptr)(functionstart +
|
||
bytesread - (buffer + bufferbytes - (char*)pinsn)),MIN_TBTABSIZ))
|
||
{ printf ("Abnormal return!..\n"); return NULL; }
|
||
|
||
ptb = (struct tbtable *)buffer;
|
||
}
|
||
else
|
||
ptb = (struct tbtable *)pinsn;
|
||
|
||
tbInfo.fixedparms = ptb->tb.fixedparms;
|
||
tbInfo.floatparms = ptb->tb.floatparms;
|
||
tbInfo.parminfo = ptb->tb_ext.parminfo;
|
||
return &tbInfo;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
#if 0
|
||
/* Given a function symbol, return a pointer to its traceback table. */
|
||
|
||
struct tbtable *
|
||
retrieve_traceback (abfd, textsec, cs, size)
|
||
bfd *abfd;
|
||
sec_ptr textsec;
|
||
struct coff_symbol *cs;
|
||
int *size; /* return function size */
|
||
{
|
||
#define TBTABLE_BUFSIZ 2000
|
||
#define MIN_TBTABSIZ 50 /* minimum buffer size to hold a
|
||
traceback table. */
|
||
|
||
static char buffer [TBTABLE_BUFSIZ];
|
||
|
||
int *pinsn;
|
||
int bytesread=0; /* total # of bytes read so far */
|
||
int bufferbytes; /* number of bytes in the buffer */
|
||
|
||
int functionstart = cs->c_value - textsec->filepos + textsec->vma;
|
||
*size = 0;
|
||
|
||
/* keep reading blocks of data from the text section, until finding a zero
|
||
word and a traceback table. */
|
||
|
||
while (bfd_get_section_contents (abfd, textsec, buffer,
|
||
(file_ptr)(functionstart + bytesread),
|
||
bufferbytes = (
|
||
(TBTABLE_BUFSIZ < (textsec->size - functionstart - bytesread)) ?
|
||
TBTABLE_BUFSIZ : (textsec->size - functionstart - bytesread))))
|
||
{
|
||
bytesread += bufferbytes;
|
||
pinsn = (int*) buffer;
|
||
|
||
/* look for a zero word. */
|
||
|
||
while (*pinsn && (pinsn < (int*)(buffer + bufferbytes - sizeof(int))))
|
||
++pinsn;
|
||
|
||
if (pinsn >= (int*)(buffer + bufferbytes))
|
||
continue;
|
||
|
||
if (*pinsn == 0) {
|
||
|
||
/* function size is the amount of bytes we have skipped so far. */
|
||
*size = bytesread - (buffer + bufferbytes - pinsn);
|
||
|
||
++pinsn;
|
||
|
||
/* if we don't have the whole traceback table in the buffer, re-read
|
||
the whole thing. */
|
||
|
||
if ((char*)pinsn > (buffer + bufferbytes - MIN_TBTABSIZ)) {
|
||
|
||
/* In case if we are *very* close to the end of the text section
|
||
and cannot read properly from that point on, abort for now.
|
||
Handle this case more graciously -- FIXME */
|
||
|
||
if (!bfd_get_section_contents (
|
||
abfd, textsec, buffer,
|
||
(file_ptr)(functionstart +
|
||
bytesread - (buffer + bufferbytes - pinsn)),MIN_TBTABSIZ))
|
||
/* abort (); */ { printf ("abort!!!\n"); return NULL; }
|
||
|
||
return (struct tbtable *)buffer;
|
||
}
|
||
else
|
||
return (struct tbtable *)pinsn;
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
#endif /* 0 */
|
||
|
||
|
||
|
||
|
||
/* Save the vital information for use when closing off the current file.
|
||
NAME is the file name the symbols came from, START_ADDR is the first
|
||
text address for the file, and SIZE is the number of bytes of text. */
|
||
|
||
#define complete_symtab(name, start_addr) { \
|
||
last_source_file = savestring (name, strlen (name)); \
|
||
last_source_start_addr = start_addr; \
|
||
}
|
||
|
||
|
||
/* Refill the symbol table input buffer
|
||
and set the variables that control fetching entries from it.
|
||
Reports an error if no data available.
|
||
This function can read past the end of the symbol table
|
||
(into the string table) but this does no harm. */
|
||
|
||
/* Reading symbol table has to be fast! Keep the followings as macros, rather
|
||
than functions. */
|
||
|
||
#define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, ALLOCED) \
|
||
{ \
|
||
char *namestr; \
|
||
if (ALLOCED) \
|
||
namestr = (NAME) + 1; \
|
||
else { \
|
||
(NAME) = namestr = \
|
||
obstack_copy0 (&objfile->symbol_obstack, (NAME) + 1, strlen ((NAME)+1)); \
|
||
(ALLOCED) = 1; \
|
||
} \
|
||
prim_record_minimal_symbol (namestr, (ADDR), (TYPE)); \
|
||
misc_func_recorded = 1; \
|
||
}
|
||
|
||
|
||
/* A parameter template, used by ADD_PARM_TO_PENDING. */
|
||
|
||
static struct symbol parmsym = { /* default parameter symbol */
|
||
"", /* name */
|
||
VAR_NAMESPACE, /* namespace */
|
||
LOC_ARG, /* class */
|
||
NULL, /* type */
|
||
0, /* line number */
|
||
0, /* value */
|
||
};
|
||
|
||
/* Add a parameter to a given pending symbol list. */
|
||
|
||
#define ADD_PARM_TO_PENDING(PARM, VALUE, PTYPE, PENDING_SYMBOLS) \
|
||
{ \
|
||
PARM = (struct symbol *) \
|
||
obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
|
||
*(PARM) = parmsym; \
|
||
SYMBOL_TYPE (PARM) = PTYPE; \
|
||
SYMBOL_VALUE (PARM) = VALUE; \
|
||
add_symbol_to_list (PARM, &PENDING_SYMBOLS); \
|
||
}
|
||
|
||
|
||
/* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
|
||
nested. At any given time, a symbol can only be in one static block.
|
||
This is the base address of current static block, zero if non exists. */
|
||
|
||
static int static_block_base = 0;
|
||
|
||
/* true if space for symbol name has been allocated. */
|
||
|
||
static int symname_alloced = 0;
|
||
|
||
/* read the whole symbol table of a given bfd. */
|
||
|
||
static void
|
||
read_xcoff_symtab (objfile, nsyms)
|
||
struct objfile *objfile; /* Object file we're reading from */
|
||
int nsyms; /* # of symbols */
|
||
{
|
||
bfd *abfd = objfile->obfd;
|
||
char *raw_symbol; /* Pointer into raw seething symbol table */
|
||
char *raw_auxptr; /* Pointer to first raw aux entry for sym */
|
||
sec_ptr textsec; /* Pointer to text section */
|
||
TracebackInfo *ptb; /* Pointer to traceback table */
|
||
|
||
struct internal_syment symbol[1];
|
||
union internal_auxent main_aux[1];
|
||
struct coff_symbol cs[1];
|
||
CORE_ADDR file_start_addr = 0;
|
||
CORE_ADDR file_end_addr = 0;
|
||
|
||
int next_file_symnum = -1;
|
||
int just_started = 1;
|
||
int depth = 0;
|
||
int toc_offset = 0; /* toc offset value in data section. */
|
||
int val;
|
||
int fcn_last_line;
|
||
int fcn_start_addr;
|
||
long fcn_line_offset;
|
||
size_t size;
|
||
|
||
struct coff_symbol fcn_stab_saved;
|
||
|
||
/* fcn_cs_saved is global because process_xcoff_symbol needs it. */
|
||
union internal_auxent fcn_aux_saved;
|
||
struct type *fcn_type_saved = NULL;
|
||
struct context_stack *new;
|
||
|
||
char *filestring = " _start_ "; /* Name of the current file. */
|
||
|
||
char *last_csect_name; /* last seen csect's name and value */
|
||
CORE_ADDR last_csect_val;
|
||
int misc_func_recorded; /* true if any misc. function */
|
||
|
||
current_objfile = objfile;
|
||
|
||
/* Get the appropriate COFF "constants" related to the file we're handling. */
|
||
N_TMASK = coff_data (abfd)->local_n_tmask;
|
||
N_BTSHFT = coff_data (abfd)->local_n_btshft;
|
||
local_symesz = coff_data (abfd)->local_symesz;
|
||
|
||
last_source_file = NULL;
|
||
last_csect_name = 0;
|
||
last_csect_val = 0;
|
||
misc_func_recorded = 0;
|
||
|
||
start_stabs ();
|
||
start_symtab (filestring, (char *)NULL, file_start_addr);
|
||
symnum = 0;
|
||
first_object_file_end = 0;
|
||
|
||
/* Allocate space for the entire symbol table at once, and read it
|
||
all in. The bfd is already positioned at the beginning of
|
||
the symbol table. */
|
||
|
||
size = coff_data (abfd)->local_symesz * nsyms;
|
||
symtbl = xmalloc (size);
|
||
|
||
val = bfd_read (symtbl, size, 1, abfd);
|
||
if (val != size)
|
||
perror_with_name ("reading symbol table");
|
||
|
||
raw_symbol = symtbl;
|
||
|
||
textsec = bfd_get_section_by_name (abfd, ".text");
|
||
if (!textsec) {
|
||
printf ("Unable to locate text section!\n");
|
||
}
|
||
|
||
while (symnum < nsyms) {
|
||
|
||
QUIT; /* make this command interruptable. */
|
||
|
||
/* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
|
||
/* read one symbol into `cs' structure. After processing the whole symbol
|
||
table, only string table will be kept in memory, symbol table and debug
|
||
section of xcoff will be freed. Thus we can mark symbols with names
|
||
in string table as `alloced'. */
|
||
{
|
||
int ii;
|
||
|
||
/* Swap and align the symbol into a reasonable C structure. */
|
||
bfd_coff_swap_sym_in (abfd, raw_symbol, symbol);
|
||
|
||
cs->c_symnum = symnum;
|
||
cs->c_nsyms = symbol->n_numaux;
|
||
if (symbol->n_zeroes) {
|
||
symname_alloced = 0;
|
||
/* We must use the original, unswapped, name here so the name field
|
||
pointed to by cs->c_name will persist throughout xcoffread. If
|
||
we use the new field, it gets overwritten for each symbol. */
|
||
cs->c_name = ((struct external_syment *)raw_symbol)->e.e_name;
|
||
} else if (symbol->n_sclass & 0x80) {
|
||
cs->c_name = debugsec + symbol->n_offset;
|
||
symname_alloced = 0;
|
||
} else { /* in string table */
|
||
cs->c_name = strtbl + (int)symbol->n_offset;
|
||
symname_alloced = 1;
|
||
}
|
||
cs->c_value = symbol->n_value;
|
||
/* n_sclass is signed (FIXME), so we had better not mask off any
|
||
high bits it contains, since the values we will be comparing
|
||
it to are also signed (FIXME). Defined in <coff/internal.h>.
|
||
At this point (3Jun92, gnu@cygnus.com) I think the fix is to
|
||
make the fields and values unsigned chars, but changing the next
|
||
line is a simple patch late in the release cycle, for now. */
|
||
cs->c_sclass = symbol->n_sclass /* & 0xff */;
|
||
cs->c_secnum = symbol->n_scnum;
|
||
cs->c_type = (unsigned)symbol->n_type;
|
||
|
||
raw_symbol += coff_data (abfd)->local_symesz;
|
||
++symnum;
|
||
|
||
raw_auxptr = raw_symbol; /* Save addr of first aux entry */
|
||
|
||
/* Skip all the auxents associated with this symbol. */
|
||
for (ii = symbol->n_numaux; ii; --ii ) {
|
||
raw_symbol += coff_data (abfd)->local_auxesz;
|
||
++symnum;
|
||
}
|
||
}
|
||
|
||
/* if symbol name starts with ".$" or "$", ignore it. */
|
||
if (cs->c_name[0] == '$' || (cs->c_name[1] == '$' && cs->c_name[0] == '.'))
|
||
continue;
|
||
|
||
if (cs->c_symnum == next_file_symnum && cs->c_sclass != C_FILE) {
|
||
if (last_source_file)
|
||
{
|
||
end_symtab (cur_src_end_addr, 1, 0, objfile);
|
||
end_stabs ();
|
||
}
|
||
|
||
start_stabs ();
|
||
start_symtab ("_globals_", (char *)NULL, (CORE_ADDR)0);
|
||
cur_src_end_addr = first_object_file_end;
|
||
/* done with all files, everything from here on is globals */
|
||
}
|
||
|
||
/* if explicitly specified as a function, treat is as one. */
|
||
if (ISFCN(cs->c_type) && cs->c_sclass != C_TPDEF) {
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
main_aux);
|
||
goto function_entry_point;
|
||
}
|
||
|
||
if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT) && cs->c_nsyms == 1)
|
||
{
|
||
/* dealing with a symbol with a csect entry. */
|
||
|
||
# define CSECT(PP) ((PP)->x_csect)
|
||
# define CSECT_LEN(PP) (CSECT(PP).x_scnlen)
|
||
# define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
|
||
# define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
|
||
# define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
|
||
|
||
/* Convert the auxent to something we can access. */
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
main_aux);
|
||
|
||
switch (CSECT_SMTYP (main_aux)) {
|
||
|
||
case XTY_ER :
|
||
continue; /* ignore all external references. */
|
||
|
||
case XTY_SD : /* a section description. */
|
||
{
|
||
switch (CSECT_SCLAS (main_aux)) {
|
||
|
||
case XMC_PR : /* a `.text' csect. */
|
||
{
|
||
|
||
/* A program csect is seen.
|
||
|
||
We have to allocate one symbol table for each program csect. Normally
|
||
gdb prefers one symtab for each compilation unit (CU). In case of AIX, one
|
||
CU might include more than one prog csect, and they don't have to be
|
||
adjacent in terms of the space they occupy in memory. Thus, one single
|
||
CU might get fragmented in the memory and gdb's file start and end address
|
||
approach does not work! */
|
||
|
||
if (last_csect_name) {
|
||
|
||
/* if no misc. function recorded in the last seen csect, enter
|
||
it as a function. This will take care of functions like
|
||
strcmp() compiled by xlc. */
|
||
|
||
if (!misc_func_recorded) {
|
||
int alloced = 0;
|
||
RECORD_MINIMAL_SYMBOL (last_csect_name, last_csect_val,
|
||
mst_text, alloced);
|
||
}
|
||
|
||
|
||
complete_symtab (filestring, file_start_addr);
|
||
cur_src_end_addr = file_end_addr;
|
||
end_symtab (file_end_addr, 1, 0, objfile);
|
||
end_stabs ();
|
||
start_stabs ();
|
||
start_symtab ((char *)NULL, (char *)NULL, (CORE_ADDR)0);
|
||
}
|
||
|
||
/* If this is the very first csect seen, basically `__start'. */
|
||
if (just_started) {
|
||
first_object_file_end = cs->c_value + CSECT_LEN (main_aux);
|
||
just_started = 0;
|
||
}
|
||
|
||
file_start_addr = cs->c_value;
|
||
file_end_addr = cs->c_value + CSECT_LEN (main_aux);
|
||
|
||
if (cs->c_name && cs->c_name[0] == '.') {
|
||
last_csect_name = cs->c_name;
|
||
last_csect_val = cs->c_value;
|
||
}
|
||
}
|
||
misc_func_recorded = 0;
|
||
continue;
|
||
|
||
case XMC_RW :
|
||
break;
|
||
|
||
/* If the section is not a data description, ignore it. Note that
|
||
uninitialized data will show up as XTY_CM/XMC_RW pair. */
|
||
|
||
case XMC_TC0:
|
||
if (toc_offset)
|
||
warning ("More than one xmc_tc0 symbol found.");
|
||
toc_offset = cs->c_value;
|
||
continue;
|
||
|
||
case XMC_TC : /* ignore toc entries */
|
||
default : /* any other XMC_XXX */
|
||
continue;
|
||
}
|
||
}
|
||
break; /* switch CSECT_SCLAS() */
|
||
|
||
case XTY_LD :
|
||
|
||
/* a function entry point. */
|
||
if (CSECT_SCLAS (main_aux) == XMC_PR) {
|
||
|
||
function_entry_point:
|
||
RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_text,
|
||
symname_alloced);
|
||
|
||
fcn_line_offset = main_aux->x_sym.x_fcnary.x_fcn.x_lnnoptr;
|
||
fcn_start_addr = cs->c_value;
|
||
|
||
/* save the function header info, which will be used
|
||
when `.bf' is seen. */
|
||
fcn_cs_saved = *cs;
|
||
fcn_aux_saved = *main_aux;
|
||
|
||
|
||
ptb = NULL;
|
||
|
||
/* If function has two auxent, then debugging information is
|
||
already available for it. Process traceback table for
|
||
functions with only one auxent. */
|
||
|
||
if (cs->c_nsyms == 1)
|
||
ptb = retrieve_tracebackinfo (abfd, textsec, cs);
|
||
|
||
else if (cs->c_nsyms != 2)
|
||
abort ();
|
||
|
||
/* If there is traceback info, create and add parameters for it. */
|
||
|
||
if (ptb && (ptb->fixedparms || ptb->floatparms)) {
|
||
|
||
int parmcnt = ptb->fixedparms + ptb->floatparms;
|
||
char *parmcode = (char*) &ptb->parminfo;
|
||
int parmvalue = ptb->framesize + 0x18; /* sizeof(LINK AREA) == 0x18 */
|
||
unsigned int ii, mask;
|
||
|
||
for (ii=0, mask = 0x80000000; ii <parmcnt; ++ii) {
|
||
struct symbol *parm;
|
||
|
||
if (ptb->parminfo & mask) { /* float or double */
|
||
mask = mask >> 1;
|
||
if (ptb->parminfo & mask) { /* double parm */
|
||
ADD_PARM_TO_PENDING
|
||
(parm, parmvalue, builtin_type_double, local_symbols);
|
||
parmvalue += sizeof (double);
|
||
}
|
||
else { /* float parm */
|
||
ADD_PARM_TO_PENDING
|
||
(parm, parmvalue, builtin_type_float, local_symbols);
|
||
parmvalue += sizeof (float);
|
||
}
|
||
}
|
||
else { /* fixed parm, use (int*) for hex rep. */
|
||
ADD_PARM_TO_PENDING (parm, parmvalue,
|
||
lookup_pointer_type (builtin_type_int),
|
||
local_symbols);
|
||
parmvalue += sizeof (int);
|
||
}
|
||
mask = mask >> 1;
|
||
}
|
||
|
||
/* Fake this as a function. Needed in process_xcoff_symbol() */
|
||
cs->c_type = 32;
|
||
|
||
finish_block(process_xcoff_symbol (cs, objfile), &local_symbols,
|
||
pending_blocks, cs->c_value,
|
||
cs->c_value + ptb->fsize, objfile);
|
||
}
|
||
continue;
|
||
}
|
||
/* shared library function trampoline code entry point. */
|
||
else if (CSECT_SCLAS (main_aux) == XMC_GL) {
|
||
|
||
/* record trampoline code entries as mst_unknown symbol. When we
|
||
lookup mst symbols, we will choose mst_text over mst_unknown. */
|
||
|
||
#if 1
|
||
/* After the implementation of incremental loading of shared
|
||
libraries, we don't want to access trampoline entries. This
|
||
approach has a consequence of the necessity to bring the whole
|
||
shared library at first, in order do anything with it (putting
|
||
breakpoints, using malloc, etc). On the other side, this is
|
||
consistient with gdb's behaviour on a SUN platform. */
|
||
|
||
/* Trying to prefer *real* function entry over its trampoline,
|
||
by assigning `mst_unknown' type to trampoline entries fails.
|
||
Gdb treats those entries as chars. FIXME. */
|
||
|
||
/* Recording this entry is necessary. Single stepping relies on
|
||
this vector to get an idea about function address boundaries. */
|
||
|
||
prim_record_minimal_symbol (0, cs->c_value, mst_unknown);
|
||
#else
|
||
|
||
/* record trampoline code entries as mst_unknown symbol. When we
|
||
lookup mst symbols, we will choose mst_text over mst_unknown. */
|
||
|
||
RECORD_MINIMAL_SYMBOL (cs->c_name, cs->c_value, mst_unknown,
|
||
symname_alloced);
|
||
#endif
|
||
continue;
|
||
}
|
||
break;
|
||
|
||
default : /* all other XTY_XXXs */
|
||
break;
|
||
} /* switch CSECT_SMTYP() */ }
|
||
|
||
switch (cs->c_sclass) {
|
||
|
||
case C_FILE:
|
||
|
||
/* see if the last csect needs to be recorded. */
|
||
|
||
if (last_csect_name && !misc_func_recorded) {
|
||
|
||
/* if no misc. function recorded in the last seen csect, enter
|
||
it as a function. This will take care of functions like
|
||
strcmp() compiled by xlc. */
|
||
|
||
int alloced = 0;
|
||
RECORD_MINIMAL_SYMBOL (last_csect_name, last_csect_val,
|
||
mst_text, alloced);
|
||
}
|
||
|
||
/* c_value field contains symnum of next .file entry in table
|
||
or symnum of first global after last .file. */
|
||
|
||
next_file_symnum = cs->c_value;
|
||
|
||
/* complete symbol table for last object file containing
|
||
debugging information. */
|
||
|
||
/* Whether or not there was a csect in the previous file, we have to call
|
||
`end_stabs' and `start_stabs' to reset type_vector,
|
||
line_vector, etc. structures. */
|
||
|
||
complete_symtab (filestring, file_start_addr);
|
||
cur_src_end_addr = file_end_addr;
|
||
end_symtab (file_end_addr, 1, 0, objfile);
|
||
end_stabs ();
|
||
start_stabs ();
|
||
start_symtab (cs->c_name, (char *)NULL, (CORE_ADDR)0);
|
||
last_csect_name = 0;
|
||
|
||
/* reset file start and end addresses. A compilation unit with no text
|
||
(only data) should have zero file boundaries. */
|
||
file_start_addr = file_end_addr = 0;
|
||
|
||
filestring = cs->c_name;
|
||
break;
|
||
|
||
|
||
case C_FUN:
|
||
|
||
#ifdef NO_DEFINE_SYMBOL
|
||
/* For a function stab, just save its type in `fcn_type_saved', and leave
|
||
it for the `.bf' processing. */
|
||
{
|
||
char *pp = (char*) index (cs->c_name, ':');
|
||
|
||
if (!pp || ( *(pp+1) != 'F' && *(pp+1) != 'f'))
|
||
fatal ("Unrecognized stab");
|
||
pp += 2;
|
||
|
||
if (fcn_type_saved)
|
||
fatal ("Unprocessed function type");
|
||
|
||
fcn_type_saved = lookup_function_type (read_type (&pp, objfile));
|
||
}
|
||
#else
|
||
fcn_stab_saved = *cs;
|
||
#endif
|
||
break;
|
||
|
||
|
||
case C_FCN:
|
||
if (strcmp (cs->c_name, ".bf") == 0) {
|
||
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
main_aux);
|
||
|
||
within_function = 1;
|
||
|
||
/* Linenos are now processed on a file-by-file, not fn-by-fn, basis.
|
||
Metin did it, I'm not sure why. FIXME. -- gnu@cygnus.com */
|
||
|
||
/* Two reasons:
|
||
|
||
1) xlc (IBM's native c compiler) postpones static function code
|
||
emission to the end of a compilation unit. This way it can
|
||
determine if those functions (statics) are needed or not, and
|
||
can do some garbage collection (I think). This makes line
|
||
numbers and corresponding addresses unordered, and we end up
|
||
with a line table like:
|
||
|
||
|
||
lineno addr
|
||
foo() 10 0x100
|
||
20 0x200
|
||
30 0x300
|
||
|
||
foo3() 70 0x400
|
||
80 0x500
|
||
90 0x600
|
||
|
||
static foo2()
|
||
40 0x700
|
||
50 0x800
|
||
60 0x900
|
||
|
||
and that breaks gdb's binary search on line numbers, if the
|
||
above table is not sorted on line numbers. And that sort
|
||
should be on function based, since gcc can emit line numbers
|
||
like:
|
||
|
||
10 0x100 - for the init/test part of a for stmt.
|
||
20 0x200
|
||
30 0x300
|
||
10 0x400 - for the increment part of a for stmt.
|
||
|
||
arrange_linenos() will do this sorting.
|
||
|
||
|
||
2) aix symbol table might look like:
|
||
|
||
c_file // beginning of a new file
|
||
.bi // beginning of include file
|
||
.ei // end of include file
|
||
.bi
|
||
.ei
|
||
|
||
basically, .bi/.ei pairs do not necessarily encapsulate
|
||
their scope. They need to be recorded, and processed later
|
||
on when we come the end of the compilation unit.
|
||
Include table (inclTable) and process_linenos() handle
|
||
that.
|
||
*/
|
||
mark_first_line (fcn_line_offset, cs->c_symnum);
|
||
|
||
new = push_context (0, fcn_start_addr);
|
||
|
||
#ifdef NO_DEFINE_SYMBOL
|
||
new->name = process_xcoff_symbol (&fcn_cs_saved, objfile);
|
||
|
||
/* Between a function symbol and `.bf', there always will be a function
|
||
stab. We save function type when processing that stab. */
|
||
|
||
if (fcn_type_saved == NULL) {
|
||
printf ("Unknown function type: symbol 0x%x\n", cs->c_symnum);
|
||
SYMBOL_TYPE (new->name) = lookup_function_type (builtin_type_int);
|
||
}
|
||
else {
|
||
SYMBOL_TYPE (new->name) = fcn_type_saved;
|
||
fcn_type_saved = NULL;
|
||
}
|
||
#else
|
||
new->name = define_symbol
|
||
(fcn_cs_saved.c_value, fcn_stab_saved.c_name, 0, 0, objfile);
|
||
#endif
|
||
}
|
||
else if (strcmp (cs->c_name, ".ef") == 0) {
|
||
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
main_aux);
|
||
|
||
/* the value of .ef is the address of epilogue code;
|
||
not useful for gdb */
|
||
/* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
|
||
contains number of lines to '}' */
|
||
|
||
fcn_last_line = main_aux->x_sym.x_misc.x_lnsz.x_lnno;
|
||
new = pop_context ();
|
||
if (context_stack_depth != 0)
|
||
error ("invalid symbol data; .bf/.ef/.bb/.eb symbol mismatch, at symbol %d.",
|
||
symnum);
|
||
|
||
finish_block (new->name, &local_symbols, new->old_blocks,
|
||
new->start_addr,
|
||
fcn_cs_saved.c_value +
|
||
fcn_aux_saved.x_sym.x_misc.x_fsize, objfile);
|
||
within_function = 0;
|
||
}
|
||
break;
|
||
|
||
case C_BSTAT : /* begin static block */
|
||
static_block_base = read_symbol_nvalue (symtbl, cs->c_value);
|
||
break;
|
||
|
||
case C_ESTAT : /* end of static block */
|
||
static_block_base = 0;
|
||
break;
|
||
|
||
case C_ARG : /* These are not implemented. */
|
||
case C_REGPARM :
|
||
case C_TPDEF :
|
||
case C_STRTAG :
|
||
case C_UNTAG :
|
||
case C_ENTAG :
|
||
printf ("ERROR: Unimplemented storage class: %d.\n", cs->c_sclass);
|
||
break;
|
||
|
||
case C_HIDEXT : /* ignore these.. */
|
||
case C_LABEL :
|
||
case C_NULL :
|
||
break;
|
||
|
||
case C_BINCL : /* beginning of include file */
|
||
|
||
/* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
|
||
order. Thus, when wee see them, we might not know enough info
|
||
to process them. Thus, we'll be saving them into a table
|
||
(inclTable) and postpone their processing. */
|
||
|
||
record_include_begin (cs);
|
||
break;
|
||
|
||
case C_EINCL : /* end of include file */
|
||
/* see the comment after case C_BINCL. */
|
||
record_include_end (cs);
|
||
break;
|
||
|
||
case C_BLOCK :
|
||
if (strcmp (cs->c_name, ".bb") == 0) {
|
||
depth++;
|
||
new = push_context (depth, cs->c_value);
|
||
}
|
||
else if (strcmp (cs->c_name, ".eb") == 0) {
|
||
new = pop_context ();
|
||
if (depth != new->depth)
|
||
error ("Invalid symbol data: .bb/.eb symbol mismatch at symbol %d.",
|
||
symnum);
|
||
|
||
depth--;
|
||
if (local_symbols && context_stack_depth > 0) {
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (new->name, &local_symbols, new->old_blocks,
|
||
new->start_addr, cs->c_value, objfile);
|
||
}
|
||
local_symbols = new->locals;
|
||
}
|
||
break;
|
||
|
||
default :
|
||
process_xcoff_symbol (cs, objfile);
|
||
break;
|
||
}
|
||
|
||
} /* while */
|
||
|
||
if (last_source_file)
|
||
{
|
||
end_symtab (cur_src_end_addr, 1, 0, objfile);
|
||
end_stabs ();
|
||
}
|
||
|
||
free (symtbl);
|
||
current_objfile = NULL;
|
||
|
||
/* Record the toc offset value of this symbol table into ldinfo structure.
|
||
If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
|
||
this information would be file auxiliary header. */
|
||
|
||
xcoff_add_toc_to_loadinfo (toc_offset);
|
||
}
|
||
|
||
#define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
|
||
(SYMBOL2) = (struct symbol *) \
|
||
obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
|
||
*(SYMBOL2) = *(SYMBOL1);
|
||
|
||
|
||
#define SYMNAME_ALLOC(NAME, ALLOCED) \
|
||
(ALLOCED) ? (NAME) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME));
|
||
|
||
|
||
/* process one xcoff symbol. */
|
||
|
||
static struct symbol *
|
||
process_xcoff_symbol (cs, objfile)
|
||
register struct coff_symbol *cs;
|
||
struct objfile *objfile;
|
||
{
|
||
struct symbol onesymbol;
|
||
register struct symbol *sym = &onesymbol;
|
||
struct symbol *sym2 = NULL;
|
||
struct type *ttype;
|
||
char *name, *pp, *qq;
|
||
int struct_and_type_combined;
|
||
int nameless;
|
||
|
||
name = cs->c_name;
|
||
if (name[0] == '.')
|
||
++name;
|
||
|
||
bzero (sym, sizeof (struct symbol));
|
||
|
||
/* default assumptions */
|
||
SYMBOL_VALUE (sym) = cs->c_value;
|
||
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
|
||
|
||
if (ISFCN (cs->c_type)) {
|
||
|
||
/* At this point, we don't know the type of the function and assume it
|
||
is int. This will be patched with the type from its stab entry later
|
||
on in patch_block_stabs () */
|
||
|
||
SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
|
||
SYMBOL_TYPE (sym) = lookup_function_type (lookup_fundamental_type (objfile, FT_INTEGER));
|
||
|
||
SYMBOL_CLASS (sym) = LOC_BLOCK;
|
||
SYMBOL_DUP (sym, sym2);
|
||
|
||
if (cs->c_sclass == C_EXT)
|
||
add_symbol_to_list (sym2, &global_symbols);
|
||
else if (cs->c_sclass == C_HIDEXT || cs->c_sclass == C_STAT)
|
||
add_symbol_to_list (sym2, &file_symbols);
|
||
}
|
||
|
||
else {
|
||
|
||
/* in case we can't figure out the type, default is `int'. */
|
||
SYMBOL_TYPE (sym) = lookup_fundamental_type (objfile, FT_INTEGER);
|
||
|
||
switch (cs->c_sclass)
|
||
{
|
||
#if 0
|
||
case C_FUN:
|
||
if (fcn_cs_saved.c_sclass == C_EXT)
|
||
add_stab_to_list (name, &global_stabs);
|
||
else
|
||
add_stab_to_list (name, &file_stabs);
|
||
break;
|
||
#endif
|
||
|
||
case C_DECL: /* a type decleration?? */
|
||
|
||
#if defined(NO_TYPEDEFS) || defined(NO_DEFINE_SYMBOL)
|
||
qq = (char*) strchr (name, ':');
|
||
if (!qq) /* skip if there is no ':' */
|
||
return NULL;
|
||
|
||
nameless = (qq == name);
|
||
|
||
struct_and_type_combined = (qq[1] == 'T' && qq[2] == 't');
|
||
pp = qq + (struct_and_type_combined ? 3 : 2);
|
||
|
||
|
||
/* To handle GNU C++ typename abbreviation, we need to be able to fill
|
||
in a type's name as soon as space for that type is allocated. */
|
||
|
||
if (struct_and_type_combined && name != qq) {
|
||
|
||
int typenums[2];
|
||
struct type *tmp_type;
|
||
char *tmp_pp = pp;
|
||
|
||
read_type_number (&tmp_pp, typenums);
|
||
tmp_type = dbx_alloc_type (typenums, objfile);
|
||
|
||
if (tmp_type && !TYPE_NAME (tmp_type) && !nameless)
|
||
TYPE_NAME (tmp_type) = SYMBOL_NAME (sym) =
|
||
obsavestring (name, qq-name,
|
||
&objfile->symbol_obstack);
|
||
}
|
||
ttype = SYMBOL_TYPE (sym) = read_type (&pp);
|
||
|
||
/* if there is no name for this typedef, you don't have to keep its
|
||
symbol, since nobody could ask for it. Otherwise, build a symbol
|
||
and add it into symbol_list. */
|
||
|
||
if (nameless)
|
||
return;
|
||
|
||
#ifdef NO_TYPEDEFS
|
||
/* Transarc wants to eliminate type definitions from the symbol table.
|
||
Limited debugging capabilities, but faster symbol table processing
|
||
and less memory usage. Note that tag definitions (starting with
|
||
'T') will remain intact. */
|
||
|
||
if (qq[1] != 'T' && (!TYPE_NAME (ttype) || *(TYPE_NAME (ttype)) == '\0')) {
|
||
|
||
if (SYMBOL_NAME (sym))
|
||
TYPE_NAME (ttype) = SYMBOL_NAME (sym);
|
||
else
|
||
TYPE_NAME (ttype) = obsavestring (name, qq-name);
|
||
|
||
return;
|
||
}
|
||
|
||
#endif /* !NO_TYPEDEFS */
|
||
|
||
/* read_type() will return null if type (or tag) definition was
|
||
unnnecessarily duplicated. Also, if the symbol doesn't have a name,
|
||
there is no need to keep it in symbol table. */
|
||
/* The above argument no longer valid. read_type() never returns NULL. */
|
||
|
||
if (!ttype)
|
||
return NULL;
|
||
|
||
/* if there is no name for this typedef, you don't have to keep its
|
||
symbol, since nobody could ask for it. Otherwise, build a symbol
|
||
and add it into symbol_list. */
|
||
|
||
if (qq[1] == 'T')
|
||
SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE;
|
||
else if (qq[1] == 't')
|
||
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
|
||
else {
|
||
warning ("Unrecognized stab string.\n");
|
||
return NULL;
|
||
}
|
||
|
||
SYMBOL_CLASS (sym) = LOC_TYPEDEF;
|
||
if (!SYMBOL_NAME (sym))
|
||
SYMBOL_NAME (sym) = obsavestring (name, qq-name);
|
||
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list
|
||
(sym2, within_function ? &local_symbols : &file_symbols);
|
||
|
||
/* For a combination of struct and type, add one more symbol
|
||
for the type. */
|
||
|
||
if (struct_and_type_combined) {
|
||
SYMBOL_DUP (sym, sym2);
|
||
SYMBOL_NAMESPACE (sym2) = VAR_NAMESPACE;
|
||
add_symbol_to_list
|
||
(sym2, within_function ? &local_symbols : &file_symbols);
|
||
}
|
||
|
||
/* assign a name to the type node. */
|
||
|
||
if (!TYPE_NAME (ttype) || *(TYPE_NAME (ttype)) == '\0') {
|
||
if (struct_and_type_combined)
|
||
TYPE_NAME (ttype) = SYMBOL_NAME (sym);
|
||
else if (qq[1] == 'T') /* struct namespace */
|
||
TYPE_NAME (ttype) = concat (
|
||
TYPE_CODE (ttype) == TYPE_CODE_UNION ? "union " :
|
||
TYPE_CODE (ttype) == TYPE_CODE_STRUCT? "struct " : "enum ",
|
||
SYMBOL_NAME (sym), NULL);
|
||
}
|
||
break;
|
||
|
||
#else /* !NO_DEFINE_SYMBOL */
|
||
return define_symbol (cs->c_value, cs->c_name, 0, 0, objfile);
|
||
#endif
|
||
|
||
case C_GSYM:
|
||
add_stab_to_list (name, &global_stabs);
|
||
break;
|
||
|
||
case C_PSYM:
|
||
case C_RPSYM:
|
||
|
||
#ifdef NO_DEFINE_SYMBOL
|
||
if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL)
|
||
return NULL;
|
||
SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack);
|
||
SYMBOL_CLASS (sym) = (cs->c_sclass == C_PSYM) ? LOC_ARG : LOC_REGPARM;
|
||
pp += 2;
|
||
SYMBOL_TYPE (sym) = read_type (&pp, objfile);
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list (sym2, &local_symbols);
|
||
break;
|
||
#else
|
||
sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile);
|
||
SYMBOL_CLASS (sym) = (cs->c_sclass == C_PSYM) ? LOC_ARG : LOC_REGPARM;
|
||
return sym;
|
||
#endif
|
||
|
||
case C_STSYM:
|
||
|
||
#ifdef NO_DEFINE_SYMBOL
|
||
if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL)
|
||
return NULL;
|
||
SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack);
|
||
SYMBOL_CLASS (sym) = LOC_STATIC;
|
||
SYMBOL_VALUE (sym) += static_block_base;
|
||
pp += 2;
|
||
SYMBOL_TYPE (sym) = read_type (&pp, objfile);
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list
|
||
(sym2, within_function ? &local_symbols : &file_symbols);
|
||
break;
|
||
#else
|
||
/* If we are going to use Sun dbx's define_symbol(), we need to
|
||
massage our stab string a little. Change 'V' type to 'S' to be
|
||
comparible with Sun. */
|
||
|
||
if (*name == ':' || (pp = (char *) index (name, ':')) == NULL)
|
||
return NULL;
|
||
|
||
++pp;
|
||
if (*pp == 'V') *pp = 'S';
|
||
sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile);
|
||
SYMBOL_VALUE (sym) += static_block_base;
|
||
return sym;
|
||
#endif
|
||
|
||
case C_LSYM:
|
||
if (*name == ':' || (pp = (char *) strchr (name, ':')) == NULL)
|
||
return NULL;
|
||
SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack);
|
||
SYMBOL_CLASS (sym) = LOC_LOCAL;
|
||
pp += 1;
|
||
SYMBOL_TYPE (sym) = read_type (&pp, objfile);
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list (sym2, &local_symbols);
|
||
break;
|
||
|
||
case C_AUTO:
|
||
SYMBOL_CLASS (sym) = LOC_LOCAL;
|
||
SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list (sym2, &local_symbols);
|
||
break;
|
||
|
||
case C_EXT:
|
||
SYMBOL_CLASS (sym) = LOC_STATIC;
|
||
SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list (sym2, &global_symbols);
|
||
break;
|
||
|
||
case C_STAT:
|
||
SYMBOL_CLASS (sym) = LOC_STATIC;
|
||
SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list
|
||
(sym2, within_function ? &local_symbols : &file_symbols);
|
||
break;
|
||
|
||
case C_REG:
|
||
printf ("ERROR! C_REG is not fully implemented!\n");
|
||
SYMBOL_CLASS (sym) = LOC_REGISTER;
|
||
SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list (sym2, &local_symbols);
|
||
break;
|
||
|
||
case C_RSYM:
|
||
|
||
#ifdef NO_DEFINE_SYMBOL
|
||
pp = (char*) strchr (name, ':');
|
||
SYMBOL_CLASS (sym) = LOC_REGISTER;
|
||
SYMBOL_VALUE (sym) = STAB_REG_TO_REGNUM (cs->c_value);
|
||
if (pp) {
|
||
SYMBOL_NAME (sym) = obsavestring (name, pp-name, &objfile -> symbol_obstack);
|
||
pp += 2;
|
||
if (*pp)
|
||
SYMBOL_TYPE (sym) = read_type (&pp, objfile);
|
||
}
|
||
else
|
||
/* else this is not a stab entry, suppose the type is either
|
||
`int' or `float', depending on the register class. */
|
||
|
||
SYMBOL_TYPE (sym) = (SYMBOL_VALUE (sym) < 32)
|
||
? lookup_fundamental_type (objfile, FT_INTEGER)
|
||
: lookup_fundamental_type (objfile, FT_FLOAT);
|
||
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list (sym2, &local_symbols);
|
||
break;
|
||
#else
|
||
if (pp) {
|
||
sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile);
|
||
return sym;
|
||
}
|
||
else {
|
||
warning ("A non-stab C_RSYM needs special handling.");
|
||
return NULL;
|
||
}
|
||
#endif
|
||
|
||
default :
|
||
warning ("Unexpected storage class: %d.", cs->c_sclass);
|
||
return NULL;
|
||
}
|
||
}
|
||
return sym2;
|
||
}
|
||
|
||
|
||
static int
|
||
read_symbol_nvalue (symtable, symno)
|
||
char *symtable;
|
||
int symno;
|
||
{
|
||
struct internal_syment symbol[1];
|
||
|
||
bfd_coff_swap_sym_in (symfile_bfd, symtable + (symno*local_symesz), symbol);
|
||
return symbol->n_value;
|
||
}
|
||
|
||
|
||
static int
|
||
read_symbol_lineno (symtable, symno)
|
||
char *symtable;
|
||
int symno;
|
||
{
|
||
struct internal_syment symbol[1];
|
||
union internal_auxent main_aux[1];
|
||
|
||
int ii;
|
||
|
||
for (ii = 0; ii < 50; ii++) {
|
||
bfd_coff_swap_sym_in (symfile_bfd,
|
||
symtable + (symno*local_symesz), symbol);
|
||
if (symbol->n_sclass == C_FCN && 0 == strcmp (symbol->n_name, ".bf"))
|
||
goto gotit;
|
||
symno += symbol->n_numaux+1;
|
||
}
|
||
|
||
printf ("GDB Error: `.bf' not found.\n");
|
||
return 0;
|
||
|
||
gotit:
|
||
/* take aux entry and return its lineno */
|
||
symno++;
|
||
bfd_coff_swap_aux_in (symfile_bfd, symtable+(symno*local_symesz),
|
||
symbol->n_type, symbol->n_sclass, main_aux);
|
||
|
||
return main_aux->x_sym.x_misc.x_lnsz.x_lnno;
|
||
}
|
||
|
||
/* Support for line number handling */
|
||
|
||
/* This function is called for every section; it finds the outer limits
|
||
* of the line table (minimum and maximum file offset) so that the
|
||
* mainline code can read the whole thing for efficiency.
|
||
*/
|
||
static void
|
||
find_linenos(abfd, asect, vpinfo)
|
||
bfd *abfd;
|
||
sec_ptr asect;
|
||
PTR vpinfo;
|
||
{
|
||
struct coff_symfile_info *info;
|
||
int size, count;
|
||
file_ptr offset, maxoff;
|
||
|
||
count = asect->lineno_count;
|
||
|
||
if (strcmp (asect->name, ".text") || count == 0)
|
||
return;
|
||
|
||
size = count * coff_data (symfile_bfd)->local_linesz;
|
||
info = (struct coff_symfile_info *)vpinfo;
|
||
offset = asect->line_filepos;
|
||
maxoff = offset + size;
|
||
|
||
if (offset < info->min_lineno_offset || info->min_lineno_offset == 0)
|
||
info->min_lineno_offset = offset;
|
||
|
||
if (maxoff > info->max_lineno_offset)
|
||
info->max_lineno_offset = maxoff;
|
||
}
|
||
|
||
|
||
/* Read in all the line numbers for fast lookups later. Leave them in
|
||
external (unswapped) format in memory; we'll swap them as we enter
|
||
them into GDB's data structures. */
|
||
|
||
static int
|
||
init_lineno (abfd, offset, size)
|
||
bfd *abfd;
|
||
file_ptr offset;
|
||
int size;
|
||
{
|
||
int val;
|
||
|
||
if (bfd_seek(abfd, offset, L_SET) < 0)
|
||
return -1;
|
||
|
||
linetab = (char *) xmalloc(size);
|
||
|
||
val = bfd_read(linetab, 1, size, abfd);
|
||
if (val != size)
|
||
return -1;
|
||
|
||
linetab_offset = offset;
|
||
linetab_size = size;
|
||
make_cleanup (free, linetab); /* Be sure it gets de-allocated. */
|
||
return 0;
|
||
}
|
||
|
||
/* dbx allows the text of a symbol name to be continued into the
|
||
next symbol name! When such a continuation is encountered
|
||
(a \ at the end of the text of a name)
|
||
call this function to get the continuation. */
|
||
/* So far, I haven't seen this happenning xlc output. I doubt we'll need this
|
||
for xcoff. */
|
||
|
||
#undef next_symbol_text
|
||
#define next_symbol_text() \
|
||
printf ("Gdb Error: symbol names on multiple lines not implemented.\n")
|
||
|
||
|
||
/* xlc/dbx combination uses a set of builtin types, starting from -1. return
|
||
the proper type node fora given builtin type #. */
|
||
|
||
struct type *
|
||
builtin_type (pp)
|
||
char **pp;
|
||
{
|
||
int typenums[2];
|
||
|
||
if (**pp != '-') {
|
||
printf ("ERROR!, unknown built-in type!\n");
|
||
return NULL;
|
||
}
|
||
*pp += 1;
|
||
read_type_number (pp, typenums);
|
||
|
||
/* default types are defined in dbxstclass.h. */
|
||
switch ( typenums[1] ) {
|
||
case 1:
|
||
return lookup_fundamental_type (current_objfile, FT_INTEGER);
|
||
case 2:
|
||
return lookup_fundamental_type (current_objfile, FT_CHAR);
|
||
case 3:
|
||
return lookup_fundamental_type (current_objfile, FT_SHORT);
|
||
case 4:
|
||
return lookup_fundamental_type (current_objfile, FT_LONG);
|
||
case 5:
|
||
return lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR);
|
||
case 6:
|
||
return lookup_fundamental_type (current_objfile, FT_SIGNED_CHAR);
|
||
case 7:
|
||
return lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT);
|
||
case 8:
|
||
return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER);
|
||
case 9:
|
||
return lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER);
|
||
case 10:
|
||
return lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG);
|
||
case 11:
|
||
return lookup_fundamental_type (current_objfile, FT_VOID);
|
||
case 12:
|
||
return lookup_fundamental_type (current_objfile, FT_FLOAT);
|
||
case 13:
|
||
return lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT);
|
||
case 14:
|
||
return lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT);
|
||
case 15:
|
||
/* requires a builtin `integer' */
|
||
return lookup_fundamental_type (current_objfile, FT_INTEGER);
|
||
case 16:
|
||
return lookup_fundamental_type (current_objfile, FT_BOOLEAN);
|
||
case 17:
|
||
/* requires builtin `short real' */
|
||
return lookup_fundamental_type (current_objfile, FT_FLOAT);
|
||
case 18:
|
||
/* requires builtin `real' */
|
||
return lookup_fundamental_type (current_objfile, FT_FLOAT);
|
||
default :
|
||
printf ("ERROR! Unknown builtin type -%d\n", typenums[1]);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
static void
|
||
xcoff_new_init (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
}
|
||
|
||
static void
|
||
xcoff_symfile_init (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
bfd *abfd = objfile->obfd;
|
||
|
||
/* Allocate struct to keep track of the symfile */
|
||
objfile -> sym_private = xmmalloc (objfile -> md,
|
||
sizeof (struct coff_symfile_info));
|
||
init_entry_point_info (objfile);
|
||
}
|
||
|
||
/* Perform any local cleanups required when we are done with a particular
|
||
objfile. I.E, we are in the process of discarding all symbol information
|
||
for an objfile, freeing up all memory held for it, and unlinking the
|
||
objfile struct from the global list of known objfiles. */
|
||
|
||
static void
|
||
xcoff_symfile_finish (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
if (objfile -> sym_private != NULL)
|
||
{
|
||
mfree (objfile -> md, objfile -> sym_private);
|
||
}
|
||
|
||
/* Start with a fresh include table for the next objfile. */
|
||
|
||
if (inclTable)
|
||
{
|
||
free (inclTable);
|
||
inclTable = NULL;
|
||
}
|
||
inclIndx = inclLength = inclDepth = 0;
|
||
}
|
||
|
||
|
||
static int
|
||
init_stringtab(abfd, offset, objfile)
|
||
bfd *abfd;
|
||
file_ptr offset;
|
||
struct objfile *objfile;
|
||
{
|
||
long length;
|
||
int val;
|
||
unsigned char lengthbuf[4];
|
||
|
||
if (bfd_seek(abfd, offset, L_SET) < 0)
|
||
return -1;
|
||
|
||
val = bfd_read((char *)lengthbuf, 1, sizeof lengthbuf, abfd);
|
||
length = bfd_h_get_32(abfd, lengthbuf);
|
||
|
||
/* If no string table is needed, then the file may end immediately
|
||
after the symbols. Just return with `strtbl' set to null. */
|
||
|
||
if (val != sizeof length || length < sizeof length)
|
||
return 0;
|
||
|
||
/* Allocate string table from symbol_obstack. We will need this table
|
||
as long as we have its symbol table around. */
|
||
|
||
strtbl = (char*) obstack_alloc (&objfile->symbol_obstack, length);
|
||
if (strtbl == NULL)
|
||
return -1;
|
||
|
||
bcopy(&length, strtbl, sizeof length);
|
||
if (length == sizeof length)
|
||
return 0;
|
||
|
||
val = bfd_read(strtbl + sizeof length, 1, length - sizeof length, abfd);
|
||
|
||
if (val != length - sizeof length || strtbl[length - 1] != '\0')
|
||
return -1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
init_debugsection(abfd)
|
||
bfd *abfd;
|
||
{
|
||
register sec_ptr secp;
|
||
bfd_size_type length;
|
||
|
||
if (debugsec) {
|
||
free(debugsec);
|
||
debugsec = NULL;
|
||
}
|
||
|
||
secp = bfd_get_section_by_name(abfd, ".debug");
|
||
if (!secp)
|
||
return 0;
|
||
|
||
if (!(length = bfd_section_size(abfd, secp)))
|
||
return 0;
|
||
|
||
debugsec = (char *) xmalloc ((unsigned)length);
|
||
if (debugsec == NULL)
|
||
return -1;
|
||
|
||
if (!bfd_get_section_contents(abfd, secp, debugsec, (file_ptr) 0, length)) {
|
||
printf ("Can't read .debug section from symbol file\n");
|
||
return -1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
free_debugsection()
|
||
{
|
||
if (debugsec)
|
||
free(debugsec);
|
||
debugsec = NULL;
|
||
}
|
||
|
||
|
||
/* xcoff version of symbol file read. */
|
||
|
||
static void
|
||
xcoff_symfile_read (objfile, section_offset, mainline)
|
||
struct objfile *objfile;
|
||
struct section_offset *section_offset;
|
||
int mainline;
|
||
{
|
||
int num_symbols; /* # of symbols */
|
||
file_ptr symtab_offset; /* symbol table and */
|
||
file_ptr stringtab_offset; /* string table file offsets */
|
||
int val;
|
||
bfd *abfd;
|
||
struct coff_symfile_info *info;
|
||
char *name;
|
||
|
||
info = (struct coff_symfile_info *) objfile -> sym_private;
|
||
symfile_bfd = abfd = objfile->obfd;
|
||
name = objfile->name;
|
||
|
||
num_symbols = bfd_get_symcount (abfd); /* # of symbols */
|
||
symtab_offset = obj_sym_filepos (abfd); /* symbol table file offset */
|
||
stringtab_offset = symtab_offset +
|
||
num_symbols * coff_data(abfd)->local_symesz;
|
||
|
||
info->min_lineno_offset = 0;
|
||
info->max_lineno_offset = 0;
|
||
bfd_map_over_sections (abfd, find_linenos, info);
|
||
|
||
/* FIXME! This stuff should move into symfile_init */
|
||
if (info->min_lineno_offset != 0
|
||
&& info->max_lineno_offset > info->min_lineno_offset) {
|
||
|
||
/* only read in the line # table if one exists */
|
||
val = init_lineno(abfd, info->min_lineno_offset,
|
||
(int) (info->max_lineno_offset - info->min_lineno_offset));
|
||
|
||
if (val < 0)
|
||
error("\"%s\": error reading line numbers\n", name);
|
||
}
|
||
|
||
val = init_stringtab(abfd, stringtab_offset, objfile);
|
||
if (val < 0) {
|
||
error ("\"%s\": can't get string table", name);
|
||
}
|
||
|
||
if (init_debugsection(abfd) < 0) {
|
||
error ("Error reading .debug section of `%s'\n", name);
|
||
}
|
||
|
||
/* Position to read the symbol table. Do not read it all at once. */
|
||
val = bfd_seek(abfd, symtab_offset, L_SET);
|
||
if (val < 0)
|
||
perror_with_name(name);
|
||
|
||
if (bfd_tell(abfd) != symtab_offset)
|
||
fatal("bfd? BFD!");
|
||
|
||
init_minimal_symbol_collection ();
|
||
make_cleanup (discard_minimal_symbols, 0);
|
||
|
||
/* Initialize load info structure. */
|
||
if (mainline)
|
||
xcoff_init_loadinfo ();
|
||
|
||
/* Now that the executable file is positioned at symbol table,
|
||
process it and define symbols accordingly. */
|
||
|
||
read_xcoff_symtab(objfile, num_symbols);
|
||
|
||
/* Free debug section. */
|
||
free_debugsection ();
|
||
|
||
/* Sort symbols alphabetically within each block. */
|
||
sort_syms ();
|
||
|
||
/* Install any minimal symbols that have been collected as the current
|
||
minimal symbols for this objfile. */
|
||
|
||
install_minimal_symbols (objfile);
|
||
|
||
/* Make a default for file to list. */
|
||
select_source_symtab (0);
|
||
}
|
||
|
||
/* XCOFF-specific parsing routine for section offsets.
|
||
Plain and simple for now. */
|
||
|
||
static
|
||
struct section_offsets *
|
||
xcoff_symfile_offsets (objfile, addr)
|
||
struct objfile *objfile;
|
||
CORE_ADDR addr;
|
||
{
|
||
struct section_offsets *section_offsets;
|
||
int i;
|
||
|
||
section_offsets = (struct section_offsets *)
|
||
obstack_alloc (&objfile -> psymbol_obstack,
|
||
sizeof (struct section_offsets) +
|
||
sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
|
||
|
||
for (i = 0; i < SECT_OFF_MAX; i++)
|
||
ANOFFSET (section_offsets, i) = addr;
|
||
|
||
return section_offsets;
|
||
}
|
||
/* Register our ability to parse symbols for xcoff BFD files. */
|
||
|
||
static struct sym_fns xcoff_sym_fns =
|
||
{
|
||
"aixcoff-rs6000", /* sym_name: name or name prefix of BFD target type */
|
||
15, /* sym_namelen: number of significant sym_name chars */
|
||
xcoff_new_init, /* sym_new_init: init anything gbl to entire symtab */
|
||
xcoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */
|
||
xcoff_symfile_read, /* sym_read: read a symbol file into symtab */
|
||
xcoff_symfile_finish, /* sym_finish: finished with file, cleanup */
|
||
xcoff_symfile_offsets, /* sym_offsets: xlate offsets ext->int form */
|
||
NULL /* next: pointer to next struct sym_fns */
|
||
};
|
||
|
||
void
|
||
_initialize_xcoffread ()
|
||
{
|
||
add_symtab_fns(&xcoff_sym_fns);
|
||
}
|
||
|
||
#else /* IBM6000_HOST */
|
||
struct type *
|
||
builtin_type (ignore)
|
||
char **ignore;
|
||
{
|
||
fatal ("GDB internal error: builtin_type called on non-RS/6000!");
|
||
}
|
||
#endif /* IBM6000_HOST */
|