bbb053fd78
mdebugread.c (struct symloc), hpread.c (struct symloc), xcoffread.c (struct symloc): Fix inaccurate comment introduced 20 Apr 1995.
3085 lines
86 KiB
C
3085 lines
86 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, 1993, 1994, 1995
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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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/* 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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need xcoff_init_loadinfo ditto.
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However, if you grab <sys/debug.h> and make it available on your
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host, and define FAKING_RS6000, then this code will compile. */
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#include "defs.h"
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#include "bfd.h"
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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 <string.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 "coff/internal.h"
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#include "libcoff.h" /* FIXME, internal data from BFD */
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#include "coff/rs6000.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 "complaints.h"
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#include "gdb-stabs.h"
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/* For interface with stabsread.c. */
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#include "aout/stab_gnu.h"
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/* For interface with partial-stab.h. */
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#define N_UNDF 0 /* Undefined symbol */
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#undef N_ABS
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#define N_ABS 2
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#define N_TEXT 4 /* Text sym -- defined at offset in text seg */
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#define N_DATA 6 /* Data sym -- defined at offset in data seg */
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#define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */
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#define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */
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#define N_FN 0x1f /* File name of .o file */
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#define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh) */
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/* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
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N_DATA, or N_BSS. When the low-order bit of other types is set,
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(e.g. N_WARNING versus N_FN), they are two different types. */
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#define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */
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#define N_INDR 0x0a
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/* The following symbols refer to set elements.
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All the N_SET[ATDB] symbols with the same name form one set.
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Space is allocated for the set in the text section, and each set
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elements value is stored into one word of the space.
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The first word of the space is the length of the set (number of elements).
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The address of the set is made into an N_SETV symbol
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whose name is the same as the name of the set.
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This symbol acts like a N_DATA global symbol
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in that it can satisfy undefined external references. */
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/* These appear as input to LD, in a .o file. */
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#define N_SETA 0x14 /* Absolute set element symbol */
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#define N_SETT 0x16 /* Text set element symbol */
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#define N_SETD 0x18 /* Data set element symbol */
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#define N_SETB 0x1A /* Bss set element symbol */
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/* This is output from LD. */
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#define N_SETV 0x1C /* Pointer to set vector in data area. */
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/* We put a pointer to this structure in the read_symtab_private field
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of the psymtab. */
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struct symloc {
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/* First symbol number for this file. */
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int first_symnum;
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/* Number of symbols in the section of the symbol table devoted to
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this file's symbols (actually, the section bracketed may contain
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more than just this file's symbols). If numsyms is 0, the only
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reason for this thing's existence is the dependency list. Nothing
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else will happen when it is read in. */
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int numsyms;
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/* Position of the start of the line number information for this psymtab. */
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unsigned int lineno_off;
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};
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/* Remember what we deduced to be the source language of this psymtab. */
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static enum language psymtab_language = language_unknown;
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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_naux; /* 0 if syment only, 1 if syment + auxent */
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long c_value;
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unsigned char 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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/* 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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/* Size of a COFF symbol. I think it is always 18, so I'm not sure
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there is any reason not to just use a #define, but might as well
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ask BFD for the size and store it here, I guess. */
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static unsigned local_symesz;
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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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/* Pointer to the string table. */
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char *strtbl;
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/* Pointer to debug section. */
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char *debugsec;
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/* Pointer to the a.out symbol table. */
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char *symtbl;
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/* Number of symbols in symtbl. */
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int symtbl_num_syms;
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};
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static struct complaint rsym_complaint =
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{"Non-stab C_RSYM `%s' needs special handling", 0, 0};
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static struct complaint storclass_complaint =
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{"Unexpected storage class: %d", 0, 0};
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static struct complaint bf_notfound_complaint =
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{"line numbers off, `.bf' symbol not found", 0, 0};
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extern struct complaint ef_complaint;
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extern struct complaint eb_complaint;
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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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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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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 void
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find_linenos PARAMS ((bfd *, sec_ptr, PTR));
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static char *
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coff_getfilename PARAMS ((union internal_auxent *, struct objfile *));
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static void
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read_symbol PARAMS ((struct internal_syment *, int));
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static int
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read_symbol_lineno PARAMS ((int));
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static int
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read_symbol_nvalue PARAMS ((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 partial_symtab *));
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static void
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add_stab_to_list PARAMS ((char *, struct pending_stabs **));
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/* Translate from a COFF section number (target_index) to a SECT_OFF_*
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code. */
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static int secnum_to_section PARAMS ((int, struct objfile *));
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struct find_targ_sec_arg {
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int targ_index;
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int *resultp;
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};
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static void find_targ_sec PARAMS ((bfd *, asection *, void *));
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static void find_targ_sec (abfd, sect, obj)
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bfd *abfd;
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asection *sect;
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PTR obj;
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{
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struct find_targ_sec_arg *args = (struct find_targ_sec_arg *)obj;
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if (sect->target_index == args->targ_index)
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{
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/* This is the section. Figure out what SECT_OFF_* code it is. */
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if (bfd_get_section_flags (abfd, sect) & SEC_CODE)
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*args->resultp = SECT_OFF_TEXT;
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else if (bfd_get_section_flags (abfd, sect) & SEC_LOAD)
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*args->resultp = SECT_OFF_DATA;
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else
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*args->resultp = SECT_OFF_BSS;
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}
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}
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/* Return the section number (SECT_OFF_*) that CS points to. */
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static int
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secnum_to_section (secnum, objfile)
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int secnum;
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struct objfile *objfile;
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{
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int off = SECT_OFF_TEXT;
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struct find_targ_sec_arg args;
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args.targ_index = secnum;
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args.resultp = &off;
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bfd_map_over_sections (objfile->obfd, find_targ_sec, &args);
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return off;
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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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/* Linenos are processed on a file-by-file basis.
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Two reasons:
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1) xlc (IBM's native c compiler) postpones static function code
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emission to the end of a compilation unit. This way it can
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determine if those functions (statics) are needed or not, and
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can do some garbage collection (I think). This makes line
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numbers and corresponding addresses unordered, and we end up
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with a line table like:
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lineno addr
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foo() 10 0x100
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20 0x200
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30 0x300
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foo3() 70 0x400
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80 0x500
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90 0x600
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static foo2()
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40 0x700
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50 0x800
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60 0x900
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and that breaks gdb's binary search on line numbers, if the
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above table is not sorted on line numbers. And that sort
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should be on function based, since gcc can emit line numbers
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like:
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10 0x100 - for the init/test part of a for stmt.
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20 0x200
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30 0x300
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10 0x400 - for the increment part of a for stmt.
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arrange_linetable() will do this sorting.
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2) aix symbol table might look like:
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c_file // beginning of a new file
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.bi // beginning of include file
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.ei // end of include file
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.bi
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.ei
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basically, .bi/.ei pairs do not necessarily encapsulate
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their scope. They need to be recorded, and processed later
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on when we come the end of the compilation unit.
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Include table (inclTable) and process_linenos() handle
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that. */
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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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/* FIXME: I think all this stuff can be replaced by just passing
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sort_linevec = 1 to end_symtab. */
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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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xmalloc (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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xrealloc (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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/* allocate a new line table. */
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newLineTb = (struct linetable *)
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xmalloc
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(sizeof (struct linetable) +
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(oldLineTb->nitems - function_count) * sizeof (struct linetable_entry));
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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];
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||
|
||
/* Now copy function lines one by one. */
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||
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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);
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newLineTb->nitems = oldLineTb->nitems - function_count;
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return newLineTb;
|
||
}
|
||
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||
/* 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
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||
represent if (the include files. */
|
||
|
||
|
||
typedef struct _inclTable {
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||
char *name; /* include filename */
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||
|
||
/* Offsets to the line table. end points to the last entry which is
|
||
part of this include file. */
|
||
int begin, end;
|
||
|
||
struct subfile *subfile;
|
||
unsigned funStartLine; /* start line # of its function */
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||
} InclTable;
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||
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||
#define INITIAL_INCLUDE_TABLE_LENGTH 20
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||
static InclTable *inclTable; /* global include table */
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||
static int inclIndx; /* last entry to table */
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||
static int inclLength; /* table length */
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||
static int inclDepth; /* nested include depth */
|
||
|
||
static void allocate_include_entry PARAMS ((void));
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||
|
||
static void
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||
record_include_begin (cs)
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||
struct coff_symbol *cs;
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{
|
||
if (inclDepth)
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||
{
|
||
/* In xcoff, we assume include files cannot be nested (not in .c files
|
||
of course, but in corresponding .s files.). */
|
||
|
||
/* This can happen with old versions of GCC.
|
||
GCC 2.3.3-930426 does not exhibit this on a test case which
|
||
a user said produced the message for him. */
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||
static struct complaint msg = {"Nested C_BINCL symbols", 0, 0};
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complain (&msg);
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||
}
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++inclDepth;
|
||
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||
allocate_include_entry ();
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||
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inclTable [inclIndx].name = cs->c_name;
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||
inclTable [inclIndx].begin = cs->c_value;
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}
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||
|
||
static void
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||
record_include_end (cs)
|
||
struct coff_symbol *cs;
|
||
{
|
||
InclTable *pTbl;
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||
|
||
if (inclDepth == 0)
|
||
{
|
||
static struct complaint msg = {"Mismatched C_BINCL/C_EINCL pair", 0, 0};
|
||
complain (&msg);
|
||
}
|
||
|
||
allocate_include_entry ();
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||
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||
pTbl = &inclTable [inclIndx];
|
||
pTbl->end = cs->c_value;
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||
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||
--inclDepth;
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||
++inclIndx;
|
||
}
|
||
|
||
static void
|
||
allocate_include_entry ()
|
||
{
|
||
if (inclTable == NULL)
|
||
{
|
||
inclTable = (InclTable *)
|
||
xmalloc (sizeof (InclTable) * INITIAL_INCLUDE_TABLE_LENGTH);
|
||
memset (inclTable,
|
||
'\0', 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);
|
||
memset (inclTable + inclLength - INITIAL_INCLUDE_TABLE_LENGTH,
|
||
'\0', sizeof (InclTable)*INITIAL_INCLUDE_TABLE_LENGTH);
|
||
}
|
||
}
|
||
|
||
/* Global variable to pass the psymtab down to all the routines involved
|
||
in psymtab to symtab processing. */
|
||
static struct partial_symtab *this_symtab_psymtab;
|
||
|
||
/* 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;
|
||
file_ptr max_offset =
|
||
((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
|
||
->max_lineno_offset;
|
||
|
||
/* subfile structure for the main compilation unit. */
|
||
struct subfile main_subfile;
|
||
|
||
/* 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;
|
||
|
||
offset =
|
||
((struct symloc *)this_symtab_psymtab->read_symtab_private)->lineno_off;
|
||
if (offset == 0)
|
||
goto return_after_cleanup;
|
||
|
||
memset (&main_subfile, '\0', sizeof (main_subfile));
|
||
|
||
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. */
|
||
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));
|
||
|
||
memset (tmpSubfile, '\0', 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 < max_offset + 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. */
|
||
|
||
#if 0
|
||
start_subfile (inclTable[ii].name, (char*)0);
|
||
#else
|
||
{
|
||
/* Pick a fake name that will produce the same results as this
|
||
one when passed to deduce_language_from_filename. Kludge on
|
||
top of kludge. */
|
||
char *fakename = strrchr (inclTable[ii].name, '.');
|
||
if (fakename == NULL)
|
||
fakename = " ?";
|
||
start_subfile (fakename, (char*)0);
|
||
free (current_subfile->name);
|
||
}
|
||
current_subfile->name = strdup (inclTable[ii].name);
|
||
#endif
|
||
|
||
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. */
|
||
memset (&main_subfile, '\0', 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)
|
||
|
||
endoffset points to the last line table entry that we should pay
|
||
attention to. */
|
||
|
||
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;
|
||
{
|
||
unsigned int curoffset;
|
||
CORE_ADDR addr;
|
||
struct external_lineno ext_lnno;
|
||
struct internal_lineno int_lnno;
|
||
unsigned int limit_offset;
|
||
bfd *abfd;
|
||
|
||
if (endoffset == 0 && startaddr == 0 && endaddr == 0)
|
||
return;
|
||
curoffset = beginoffset;
|
||
limit_offset =
|
||
((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
|
||
->max_lineno_offset;
|
||
|
||
if (endoffset != 0)
|
||
{
|
||
if (endoffset >= limit_offset)
|
||
{
|
||
static struct complaint msg =
|
||
{"Bad line table offset in C_EINCL directive", 0, 0};
|
||
complain (&msg);
|
||
return;
|
||
}
|
||
limit_offset = endoffset;
|
||
}
|
||
else
|
||
limit_offset -= 1;
|
||
abfd = this_symtab_psymtab->objfile->obfd;
|
||
|
||
while (curoffset <= limit_offset)
|
||
{
|
||
bfd_seek (abfd, curoffset, SEEK_SET);
|
||
bfd_read (&ext_lnno, sizeof (struct external_lineno), 1, abfd);
|
||
bfd_coff_swap_lineno_in (abfd, &ext_lnno, &int_lnno);
|
||
|
||
/* Find the address this line represents. */
|
||
addr = (int_lnno.l_lnno
|
||
? int_lnno.l_addr.l_paddr
|
||
: read_symbol_nvalue (int_lnno.l_addr.l_symndx));
|
||
addr += ANOFFSET (this_symtab_psymtab->objfile->section_offsets,
|
||
SECT_OFF_TEXT);
|
||
|
||
if (addr < startaddr || (endaddr && addr >= endaddr))
|
||
return;
|
||
|
||
if (int_lnno.l_lnno == 0)
|
||
{
|
||
*firstLine = read_symbol_lineno (int_lnno.l_addr.l_symndx);
|
||
record_line (subfile, 0, addr);
|
||
--(*firstLine);
|
||
}
|
||
else
|
||
record_line (subfile, *firstLine + int_lnno.l_lnno, addr);
|
||
curoffset += 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;
|
||
|
||
static TracebackInfo *retrieve_tracebackinfo
|
||
PARAMS ((bfd *, struct coff_symbol *));
|
||
|
||
/* Given a function symbol, return its traceback information. */
|
||
|
||
static TracebackInfo *
|
||
retrieve_tracebackinfo (abfd, cs)
|
||
bfd *abfd;
|
||
struct coff_symbol *cs;
|
||
{
|
||
#define TBTABLE_BUFSIZ 2000
|
||
|
||
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;
|
||
|
||
asection *textsec;
|
||
|
||
/* FIXME: Should be looking through all sections, based on the
|
||
address we are considering. Just using ".text" loses if more
|
||
than one section has code in it. */
|
||
textsec = bfd_get_section_by_name (abfd, ".text");
|
||
if (!textsec)
|
||
{
|
||
#if 0
|
||
/* If there is only data, no text, that is OK. */
|
||
printf_unfiltered ("Unable to locate text section!\n");
|
||
#endif
|
||
return;
|
||
}
|
||
|
||
functionstart = cs->c_value - textsec->vma;
|
||
|
||
memset (&tbInfo, '\0', sizeof (tbInfo));
|
||
|
||
/* keep reading blocks of data from the text section, until finding a zero
|
||
word and a traceback table. */
|
||
|
||
/* Note: The logical thing way to write this code would be to assign
|
||
to bufferbytes within the while condition. But that triggers a
|
||
compiler (xlc in AIX 3.2) bug, so simplify it... */
|
||
bufferbytes =
|
||
(TBTABLE_BUFSIZ < (textsec->_raw_size - functionstart - bytesread) ?
|
||
TBTABLE_BUFSIZ : (textsec->_raw_size - functionstart - bytesread));
|
||
while (bufferbytes
|
||
&& (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. */
|
||
|
||
/* This is how much to read to get the traceback table.
|
||
8 bytes of the traceback table are always present, plus we
|
||
look at parminfo. */
|
||
#define MIN_TBTABSIZ 12
|
||
|
||
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.
|
||
|
||
This could happen if the traceback table is only 8 bytes,
|
||
but we try to read 12 bytes of it.
|
||
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_unfiltered ("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;
|
||
}
|
||
bufferbytes =
|
||
(TBTABLE_BUFSIZ < (textsec->_raw_size - functionstart - bytesread) ?
|
||
TBTABLE_BUFSIZ : (textsec->_raw_size - functionstart - bytesread));
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/* 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, SECTION, OBJFILE) \
|
||
{ \
|
||
char *namestr; \
|
||
namestr = (NAME); \
|
||
if (namestr[0] == '.') ++namestr; \
|
||
prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
|
||
(char *)NULL, (SECTION), (OBJFILE)); \
|
||
misc_func_recorded = 1; \
|
||
}
|
||
|
||
|
||
/* A parameter template, used by ADD_PARM_TO_PENDING. It is initialized
|
||
in our initializer function at the bottom of the file, to avoid
|
||
dependencies on the exact "struct symbol" format. */
|
||
|
||
static struct symbol parmsym;
|
||
|
||
/* 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;
|
||
|
||
/* Section number for the current static block. */
|
||
|
||
static int static_block_section = -1;
|
||
|
||
/* true if space for symbol name has been allocated. */
|
||
|
||
static int symname_alloced = 0;
|
||
|
||
/* Next symbol to read. Pointer into raw seething symbol table. */
|
||
|
||
static char *raw_symbol;
|
||
|
||
/* This is the function which stabsread.c calls to get symbol
|
||
continuations. */
|
||
static char *
|
||
xcoff_next_symbol_text ()
|
||
{
|
||
struct internal_syment symbol;
|
||
static struct complaint msg =
|
||
{"Unexpected symbol continuation", 0, 0};
|
||
char *retval;
|
||
struct objfile *objfile = this_symtab_psymtab->objfile;
|
||
|
||
bfd_coff_swap_sym_in (objfile->obfd, raw_symbol, &symbol);
|
||
if (symbol.n_zeroes)
|
||
{
|
||
complain (&msg);
|
||
|
||
/* Return something which points to '\0' and hope the symbol reading
|
||
code does something reasonable. */
|
||
retval = "";
|
||
}
|
||
else if (symbol.n_sclass & 0x80)
|
||
{
|
||
retval =
|
||
((struct coff_symfile_info *)objfile->sym_private)->debugsec
|
||
+ symbol.n_offset;
|
||
raw_symbol +=
|
||
coff_data (objfile->obfd)->local_symesz;
|
||
++symnum;
|
||
}
|
||
else
|
||
{
|
||
complain (&msg);
|
||
|
||
/* Return something which points to '\0' and hope the symbol reading
|
||
code does something reasonable. */
|
||
retval = "";
|
||
}
|
||
return retval;
|
||
}
|
||
|
||
/* Read symbols for a given partial symbol table. */
|
||
|
||
static void
|
||
read_xcoff_symtab (pst)
|
||
struct partial_symtab *pst;
|
||
{
|
||
struct objfile *objfile = pst->objfile;
|
||
bfd *abfd = objfile->obfd;
|
||
char *raw_auxptr; /* Pointer to first raw aux entry for sym */
|
||
TracebackInfo *ptb; /* Pointer to traceback table */
|
||
char *strtbl = ((struct coff_symfile_info *)objfile->sym_private)->strtbl;
|
||
char *debugsec =
|
||
((struct coff_symfile_info *)objfile->sym_private)->debugsec;
|
||
|
||
struct internal_syment symbol[1];
|
||
union internal_auxent main_aux;
|
||
struct coff_symbol cs[1];
|
||
CORE_ADDR file_start_addr = 0;
|
||
CORE_ADDR file_end_addr = 0;
|
||
|
||
int next_file_symnum = -1;
|
||
unsigned int max_symnum;
|
||
int just_started = 1;
|
||
int depth = 0;
|
||
int val;
|
||
int fcn_start_addr;
|
||
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 last_csect_sec;
|
||
int misc_func_recorded; /* true if any misc. function */
|
||
|
||
this_symtab_psymtab = pst;
|
||
|
||
/* Get the appropriate COFF "constants" related to the file we're
|
||
handling. */
|
||
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 = ((struct symloc *)pst->read_symtab_private)->first_symnum;
|
||
max_symnum =
|
||
symnum + ((struct symloc *)pst->read_symtab_private)->numsyms;
|
||
first_object_file_end = 0;
|
||
|
||
raw_symbol =
|
||
((struct coff_symfile_info *) objfile->sym_private)->symtbl
|
||
+ symnum * local_symesz;
|
||
|
||
while (symnum < max_symnum)
|
||
{
|
||
|
||
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_naux = 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;
|
||
/* If it's exactly E_SYMNMLEN characters long it isn't
|
||
'\0'-terminated. */
|
||
if (cs->c_name[E_SYMNMLEN - 1] != '\0')
|
||
{
|
||
char *p;
|
||
p = obstack_alloc (&objfile->symbol_obstack, E_SYMNMLEN + 1);
|
||
strncpy (p, cs->c_name, E_SYMNMLEN);
|
||
p[E_SYMNMLEN] = '\0';
|
||
cs->c_name = p;
|
||
symname_alloced = 1;
|
||
}
|
||
}
|
||
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;
|
||
cs->c_sclass = symbol->n_sclass;
|
||
cs->c_secnum = symbol->n_scnum;
|
||
cs->c_type = (unsigned)symbol->n_type;
|
||
|
||
raw_symbol += coff_data (abfd)->local_symesz;
|
||
++symnum;
|
||
|
||
/* Save addr of first aux entry. */
|
||
raw_auxptr = raw_symbol;
|
||
|
||
/* 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)
|
||
{
|
||
pst->symtab =
|
||
end_symtab (cur_src_end_addr, 1, 0, objfile, SECT_OFF_TEXT);
|
||
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,
|
||
0, cs->c_naux, &main_aux);
|
||
goto function_entry_point;
|
||
}
|
||
|
||
if ((cs->c_sclass == C_EXT || cs->c_sclass == C_HIDEXT)
|
||
&& cs->c_naux == 1)
|
||
{
|
||
/* Dealing with a symbol with a csect entry. */
|
||
|
||
#define CSECT(PP) ((PP)->x_csect)
|
||
#define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
|
||
#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,
|
||
0, cs->c_naux, &main_aux);
|
||
|
||
switch (CSECT_SMTYP (&main_aux))
|
||
{
|
||
|
||
case XTY_ER:
|
||
/* Ignore all external references. */
|
||
continue;
|
||
|
||
case XTY_SD:
|
||
/* A section description. */
|
||
{
|
||
switch (CSECT_SCLAS (&main_aux))
|
||
{
|
||
|
||
case XMC_PR:
|
||
{
|
||
|
||
/* A program csect is seen. We have to allocate one
|
||
symbol table for each program csect. Normally gdb
|
||
prefers one symtab for each source file. In case
|
||
of AIX, one source file might include more than one
|
||
[PR] csect, and they don't have to be adjacent in
|
||
terms of the space they occupy in memory. Thus, one
|
||
single source file might get fragmented in the
|
||
memory and gdb's file start and end address
|
||
approach does not work! GCC (and I think xlc) seem
|
||
to put all the code in the unnamed program csect. */
|
||
|
||
if (last_csect_name)
|
||
{
|
||
complete_symtab (filestring, file_start_addr);
|
||
cur_src_end_addr = file_end_addr;
|
||
end_symtab (file_end_addr, 1, 0, objfile,
|
||
SECT_OFF_TEXT);
|
||
end_stabs ();
|
||
start_stabs ();
|
||
/* Give all csects for this source file the same
|
||
name. */
|
||
start_symtab (filestring, 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 + ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT);
|
||
file_end_addr = file_start_addr + CSECT_LEN (&main_aux);
|
||
|
||
if (cs->c_name && cs->c_name[0] == '.')
|
||
{
|
||
last_csect_name = cs->c_name;
|
||
last_csect_val = cs->c_value;
|
||
last_csect_sec = secnum_to_section (cs->c_secnum, objfile);
|
||
}
|
||
}
|
||
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:
|
||
continue;
|
||
|
||
case XMC_TC:
|
||
continue;
|
||
|
||
default:
|
||
/* Ignore the symbol. */
|
||
continue;
|
||
}
|
||
}
|
||
break;
|
||
|
||
case XTY_LD:
|
||
|
||
switch (CSECT_SCLAS (&main_aux))
|
||
{
|
||
case XMC_PR:
|
||
/* a function entry point. */
|
||
function_entry_point:
|
||
|
||
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_naux == 1)
|
||
ptb = retrieve_tracebackinfo (abfd, cs);
|
||
|
||
else if (cs->c_naux != 2)
|
||
{
|
||
static struct complaint msg =
|
||
{"Expected one or two auxents for function", 0, 0};
|
||
complain (&msg);
|
||
}
|
||
|
||
/* 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;
|
||
|
||
/* The link area is 0x18 bytes. */
|
||
int parmvalue = ptb->framesize + 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
|
||
{
|
||
static struct type *intparm_type;
|
||
if (intparm_type == NULL)
|
||
{
|
||
|
||
/* Create a type, which is a pointer
|
||
type (a kludge to make it print
|
||
in hex), but which has a name
|
||
indicating we don't know the real
|
||
type. */
|
||
|
||
intparm_type =
|
||
init_type
|
||
(TYPE_CODE_PTR,
|
||
TARGET_PTR_BIT / HOST_CHAR_BIT,
|
||
0,
|
||
"<non-float parameter>",
|
||
NULL);
|
||
TYPE_TARGET_TYPE (intparm_type) =
|
||
builtin_type_void;
|
||
}
|
||
ADD_PARM_TO_PENDING
|
||
(parm, parmvalue,
|
||
intparm_type,
|
||
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;
|
||
|
||
case XMC_GL:
|
||
/* shared library function trampoline code entry point. */
|
||
continue;
|
||
|
||
case XMC_DS:
|
||
/* The symbols often have the same names as debug symbols for
|
||
functions, and confuse lookup_symbol. */
|
||
continue;
|
||
|
||
default:
|
||
/* xlc puts each variable in a separate csect, so we get
|
||
an XTY_SD for each variable. But gcc puts several
|
||
variables in a csect, so that each variable only gets
|
||
an XTY_LD. We still need to record them. This will
|
||
typically be XMC_RW; I suspect XMC_RO and XMC_BS might
|
||
be possible too. */
|
||
break;
|
||
}
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
switch (cs->c_sclass)
|
||
{
|
||
|
||
case C_FILE:
|
||
|
||
/* 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, SECT_OFF_TEXT);
|
||
end_stabs ();
|
||
|
||
/* XCOFF, according to the AIX 3.2 documentation, puts the filename
|
||
in cs->c_name. But xlc 1.3.0.2 has decided to do things the
|
||
standard COFF way and put it in the auxent. We use the auxent if
|
||
the symbol is ".file" and an auxent exists, otherwise use the symbol
|
||
itself. Simple enough. */
|
||
if (!strcmp (cs->c_name, ".file") && cs->c_naux > 0)
|
||
{
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
0, cs->c_naux, &main_aux);
|
||
filestring = coff_getfilename (&main_aux, objfile);
|
||
}
|
||
else
|
||
filestring = cs->c_name;
|
||
|
||
start_stabs ();
|
||
start_symtab (filestring, (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;
|
||
break;
|
||
|
||
case C_FUN:
|
||
fcn_stab_saved = *cs;
|
||
break;
|
||
|
||
case C_FCN:
|
||
if (STREQ (cs->c_name, ".bf"))
|
||
{
|
||
CORE_ADDR off = ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT);
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
0, cs->c_naux, &main_aux);
|
||
|
||
within_function = 1;
|
||
|
||
new = push_context (0, fcn_start_addr + off);
|
||
|
||
new->name = define_symbol
|
||
(fcn_cs_saved.c_value + off,
|
||
fcn_stab_saved.c_name, 0, 0, objfile);
|
||
if (new->name != NULL)
|
||
SYMBOL_SECTION (new->name) = SECT_OFF_TEXT;
|
||
}
|
||
else if (STREQ (cs->c_name, ".ef"))
|
||
{
|
||
|
||
bfd_coff_swap_aux_in (abfd, raw_auxptr, cs->c_type, cs->c_sclass,
|
||
0, cs->c_naux, &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 '}' */
|
||
|
||
new = pop_context ();
|
||
/* Stack must be empty now. */
|
||
if (context_stack_depth > 0 || new == NULL)
|
||
{
|
||
complain (&ef_complaint, cs->c_symnum);
|
||
within_function = 0;
|
||
break;
|
||
}
|
||
|
||
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
|
||
+ ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT)),
|
||
objfile);
|
||
within_function = 0;
|
||
}
|
||
break;
|
||
|
||
case C_BSTAT:
|
||
/* Begin static block. */
|
||
{
|
||
struct internal_syment symbol;
|
||
|
||
read_symbol (&symbol, cs->c_value);
|
||
static_block_base = symbol.n_value;
|
||
static_block_section =
|
||
secnum_to_section (symbol.n_scnum, objfile);
|
||
}
|
||
break;
|
||
|
||
case C_ESTAT:
|
||
/* End of static block. */
|
||
static_block_base = 0;
|
||
static_block_section = -1;
|
||
break;
|
||
|
||
case C_ARG:
|
||
case C_REGPARM:
|
||
case C_REG:
|
||
case C_TPDEF:
|
||
case C_STRTAG:
|
||
case C_UNTAG:
|
||
case C_ENTAG:
|
||
{
|
||
static struct complaint msg =
|
||
{"Unrecognized storage class %d.", 0, 0};
|
||
complain (&msg, cs->c_sclass);
|
||
}
|
||
break;
|
||
|
||
case C_LABEL:
|
||
case C_NULL:
|
||
/* Ignore these. */
|
||
break;
|
||
|
||
case C_HIDEXT:
|
||
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 (STREQ (cs->c_name, ".bb"))
|
||
{
|
||
depth++;
|
||
new = push_context (depth,
|
||
(cs->c_value
|
||
+ ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT)));
|
||
}
|
||
else if (STREQ (cs->c_name, ".eb"))
|
||
{
|
||
new = pop_context ();
|
||
if (depth-- != new->depth)
|
||
{
|
||
complain (&eb_complaint, symnum);
|
||
break;
|
||
}
|
||
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
|
||
+ ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT)),
|
||
objfile);
|
||
}
|
||
local_symbols = new->locals;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
process_xcoff_symbol (cs, objfile);
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (last_source_file)
|
||
{
|
||
struct symtab *s;
|
||
|
||
complete_symtab (filestring, file_start_addr);
|
||
cur_src_end_addr = file_end_addr;
|
||
s = end_symtab (file_end_addr, 1, 0, objfile, SECT_OFF_TEXT);
|
||
/* When reading symbols for the last C_FILE of the objfile, try
|
||
to make sure that we set pst->symtab to the symtab for the
|
||
file, not to the _globals_ symtab. I'm not sure whether this
|
||
actually works right or when/if it comes up. */
|
||
if (pst->symtab == NULL)
|
||
pst->symtab = s;
|
||
end_stabs ();
|
||
}
|
||
}
|
||
|
||
#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));
|
||
|
||
|
||
static struct type *func_symbol_type;
|
||
static struct type *var_symbol_type;
|
||
|
||
/* 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;
|
||
|
||
int sec;
|
||
CORE_ADDR off;
|
||
|
||
if (cs->c_secnum < 0)
|
||
{
|
||
/* The value is a register number, offset within a frame, etc.,
|
||
and does not get relocated. */
|
||
off = 0;
|
||
sec = -1;
|
||
}
|
||
else
|
||
{
|
||
sec = secnum_to_section (cs->c_secnum, objfile);
|
||
off = ANOFFSET (objfile->section_offsets, sec);
|
||
}
|
||
|
||
name = cs->c_name;
|
||
if (name[0] == '.')
|
||
++name;
|
||
|
||
memset (sym, '\0', sizeof (struct symbol));
|
||
|
||
/* default assumptions */
|
||
SYMBOL_VALUE (sym) = cs->c_value + off;
|
||
SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE;
|
||
SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
|
||
|
||
if (ISFCN (cs->c_type))
|
||
{
|
||
/* At this point, we don't know the type of the function. This
|
||
will be patched with the type from its stab entry later on in
|
||
patch_block_stabs (), unless the file was compiled without -g. */
|
||
|
||
SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
|
||
SYMBOL_TYPE (sym) = func_symbol_type;
|
||
|
||
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, provide default. */
|
||
SYMBOL_TYPE (sym) = var_symbol_type;
|
||
|
||
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_GSYM:
|
||
add_stab_to_list (name, &global_stabs);
|
||
break;
|
||
|
||
case C_BCOMM:
|
||
common_block_start (cs->c_name, objfile);
|
||
break;
|
||
|
||
case C_ECOMM:
|
||
common_block_end (objfile);
|
||
break;
|
||
|
||
default:
|
||
complain (&storclass_complaint, cs->c_sclass);
|
||
/* FALLTHROUGH */
|
||
|
||
case C_DECL:
|
||
case C_PSYM:
|
||
case C_RPSYM:
|
||
case C_ECOML:
|
||
case C_LSYM:
|
||
case C_RSYM:
|
||
|
||
{
|
||
sym = define_symbol (cs->c_value + off, cs->c_name, 0, 0, objfile);
|
||
if (sym != NULL)
|
||
{
|
||
SYMBOL_SECTION (sym) = sec;
|
||
}
|
||
return sym;
|
||
}
|
||
|
||
case C_STSYM:
|
||
|
||
/* For xlc (not GCC), the 'V' symbol descriptor is used for
|
||
all statics and we need to distinguish file-scope versus
|
||
function-scope using within_function. We do this by
|
||
changing the string we pass to define_symbol to use 'S'
|
||
where we need to, which is not necessarily super-clean,
|
||
but seems workable enough. */
|
||
|
||
if (*name == ':' || (pp = (char *) strchr(name, ':')) == NULL)
|
||
return NULL;
|
||
|
||
++pp;
|
||
if (*pp == 'V' && !within_function)
|
||
*pp = 'S';
|
||
sym = define_symbol ((cs->c_value
|
||
+ ANOFFSET (objfile->section_offsets,
|
||
static_block_section)),
|
||
cs->c_name, 0, 0, objfile);
|
||
if (sym != NULL)
|
||
{
|
||
SYMBOL_VALUE (sym) += static_block_base;
|
||
SYMBOL_SECTION (sym) = static_block_section;
|
||
}
|
||
return sym;
|
||
|
||
#if 0
|
||
/* These appear to be vestigial remnants of coffread.c; I don't
|
||
think any of them are used for xcoff. */
|
||
|
||
case C_AUTO:
|
||
SYMBOL_CLASS (sym) = LOC_LOCAL;
|
||
SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
|
||
SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list (sym2, &local_symbols);
|
||
break;
|
||
|
||
case C_STAT:
|
||
SYMBOL_CLASS (sym) = LOC_STATIC;
|
||
SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
|
||
SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list
|
||
(sym2, within_function ? &local_symbols : &file_symbols);
|
||
break;
|
||
|
||
case C_RSYM:
|
||
pp = (char*) strchr (name, ':');
|
||
if (pp)
|
||
{
|
||
sym = define_symbol (cs->c_value, cs->c_name, 0, 0, objfile);
|
||
if (sym != NULL)
|
||
SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
|
||
return sym;
|
||
}
|
||
else
|
||
{
|
||
complain (&rsym_complaint, name);
|
||
return NULL;
|
||
}
|
||
#endif /* 0 */
|
||
|
||
/* I think this one is used (dubious, I think, shouldn't
|
||
it go into the msyms only?). */
|
||
case C_EXT:
|
||
SYMBOL_CLASS (sym) = LOC_STATIC;
|
||
SYMBOL_NAME (sym) = SYMNAME_ALLOC (name, symname_alloced);
|
||
SYMBOL_SECTION (sym) = secnum_to_section (cs->c_secnum, objfile);
|
||
SYMBOL_DUP (sym, sym2);
|
||
add_symbol_to_list (sym2, &global_symbols);
|
||
break;
|
||
|
||
}
|
||
}
|
||
return sym2;
|
||
}
|
||
|
||
/* Extract the file name from the aux entry of a C_FILE symbol. Return
|
||
only the last component of the name. Result is in static storage and
|
||
is only good for temporary use. */
|
||
|
||
static char *
|
||
coff_getfilename (aux_entry, objfile)
|
||
union internal_auxent *aux_entry;
|
||
struct objfile *objfile;
|
||
{
|
||
static char buffer[BUFSIZ];
|
||
register char *temp;
|
||
char *result;
|
||
|
||
if (aux_entry->x_file.x_n.x_zeroes == 0)
|
||
strcpy (buffer,
|
||
((struct coff_symfile_info *)objfile->sym_private)->strtbl
|
||
+ aux_entry->x_file.x_n.x_offset);
|
||
else
|
||
{
|
||
strncpy (buffer, aux_entry->x_file.x_fname, FILNMLEN);
|
||
buffer[FILNMLEN] = '\0';
|
||
}
|
||
result = buffer;
|
||
|
||
/* FIXME: We should not be throwing away the information about what
|
||
directory. It should go into dirname of the symtab, or some such
|
||
place. */
|
||
if ((temp = strrchr (result, '/')) != NULL)
|
||
result = temp + 1;
|
||
return (result);
|
||
}
|
||
|
||
/* Set *SYMBOL to symbol number symno in symtbl. */
|
||
static void
|
||
read_symbol (symbol, symno)
|
||
struct internal_syment *symbol;
|
||
int symno;
|
||
{
|
||
int nsyms =
|
||
((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
|
||
->symtbl_num_syms;
|
||
char *stbl =
|
||
((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
|
||
->symtbl;
|
||
if (symno < 0 || symno >= nsyms)
|
||
{
|
||
static struct complaint msg =
|
||
{"Invalid symbol offset", 0, 0};
|
||
complain (&msg);
|
||
symbol->n_value = 0;
|
||
symbol->n_scnum = -1;
|
||
return;
|
||
}
|
||
bfd_coff_swap_sym_in (this_symtab_psymtab->objfile->obfd,
|
||
stbl + (symno*local_symesz),
|
||
symbol);
|
||
}
|
||
|
||
/* Get value corresponding to symbol number symno in symtbl. */
|
||
|
||
static int
|
||
read_symbol_nvalue (symno)
|
||
int symno;
|
||
{
|
||
struct internal_syment symbol[1];
|
||
|
||
read_symbol (symbol, symno);
|
||
return symbol->n_value;
|
||
}
|
||
|
||
|
||
/* Find the address of the function corresponding to symno, where
|
||
symno is the symbol pointed to by the linetable. */
|
||
|
||
static int
|
||
read_symbol_lineno (symno)
|
||
int symno;
|
||
{
|
||
int nsyms =
|
||
((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
|
||
->symtbl_num_syms;
|
||
char *stbl =
|
||
((struct coff_symfile_info *)this_symtab_psymtab->objfile->sym_private)
|
||
->symtbl;
|
||
struct internal_syment symbol[1];
|
||
union internal_auxent main_aux[1];
|
||
|
||
if (symno < 0)
|
||
{
|
||
complain (&bf_notfound_complaint);
|
||
return 0;
|
||
}
|
||
|
||
/* Note that just searching for a short distance (e.g. 50 symbols)
|
||
is not enough, at least in the following case.
|
||
|
||
.extern foo
|
||
[many .stabx entries]
|
||
[a few functions, referring to foo]
|
||
.globl foo
|
||
.bf
|
||
|
||
What happens here is that the assembler moves the .stabx entries
|
||
to right before the ".bf" for foo, but the symbol for "foo" is before
|
||
all the stabx entries. See PR gdb/2222. */
|
||
|
||
/* Maintaining a table of .bf entries might be preferable to this search.
|
||
If I understand things correctly it would need to be done only for
|
||
the duration of a single psymtab to symtab conversion. */
|
||
while (symno < nsyms)
|
||
{
|
||
bfd_coff_swap_sym_in (symfile_bfd,
|
||
stbl + (symno * local_symesz), symbol);
|
||
if (symbol->n_sclass == C_FCN && STREQ (symbol->n_name, ".bf"))
|
||
goto gotit;
|
||
symno += symbol->n_numaux + 1;
|
||
}
|
||
|
||
complain (&bf_notfound_complaint);
|
||
return 0;
|
||
|
||
gotit:
|
||
/* take aux entry and return its lineno */
|
||
symno++;
|
||
bfd_coff_swap_aux_in (this_symtab_psymtab->objfile->obfd,
|
||
stbl + symno * local_symesz,
|
||
symbol->n_type, symbol->n_sclass,
|
||
0, symbol->n_numaux, 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 (!STREQ (asect->name, ".text") || count == 0)
|
||
return;
|
||
|
||
size = count * coff_data (abfd)->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;
|
||
}
|
||
|
||
static void xcoff_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
|
||
|
||
static void
|
||
xcoff_psymtab_to_symtab_1 (pst)
|
||
struct partial_symtab *pst;
|
||
{
|
||
struct cleanup *old_chain;
|
||
int i;
|
||
|
||
if (!pst)
|
||
return;
|
||
|
||
if (pst->readin)
|
||
{
|
||
fprintf_unfiltered
|
||
(gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
|
||
pst->filename);
|
||
return;
|
||
}
|
||
|
||
/* Read in all partial symtabs on which this one is dependent */
|
||
for (i = 0; i < pst->number_of_dependencies; i++)
|
||
if (!pst->dependencies[i]->readin)
|
||
{
|
||
/* Inform about additional files that need to be read in. */
|
||
if (info_verbose)
|
||
{
|
||
fputs_filtered (" ", gdb_stdout);
|
||
wrap_here ("");
|
||
fputs_filtered ("and ", gdb_stdout);
|
||
wrap_here ("");
|
||
printf_filtered ("%s...", pst->dependencies[i]->filename);
|
||
wrap_here (""); /* Flush output */
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
xcoff_psymtab_to_symtab_1 (pst->dependencies[i]);
|
||
}
|
||
|
||
if (((struct symloc *)pst->read_symtab_private)->numsyms != 0)
|
||
{
|
||
/* Init stuff necessary for reading in symbols. */
|
||
stabsread_init ();
|
||
buildsym_init ();
|
||
old_chain = make_cleanup (really_free_pendings, 0);
|
||
|
||
read_xcoff_symtab (pst);
|
||
sort_symtab_syms (pst->symtab);
|
||
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
pst->readin = 1;
|
||
}
|
||
|
||
static void xcoff_psymtab_to_symtab PARAMS ((struct partial_symtab *));
|
||
|
||
/* Read in all of the symbols for a given psymtab for real.
|
||
Be verbose about it if the user wants that. */
|
||
|
||
static void
|
||
xcoff_psymtab_to_symtab (pst)
|
||
struct partial_symtab *pst;
|
||
{
|
||
bfd *sym_bfd;
|
||
|
||
if (!pst)
|
||
return;
|
||
|
||
if (pst->readin)
|
||
{
|
||
fprintf_unfiltered
|
||
(gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
|
||
pst->filename);
|
||
return;
|
||
}
|
||
|
||
if (((struct symloc *)pst->read_symtab_private)->numsyms != 0
|
||
|| pst->number_of_dependencies)
|
||
{
|
||
/* Print the message now, before reading the string table,
|
||
to avoid disconcerting pauses. */
|
||
if (info_verbose)
|
||
{
|
||
printf_filtered ("Reading in symbols for %s...", pst->filename);
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
sym_bfd = pst->objfile->obfd;
|
||
|
||
next_symbol_text_func = xcoff_next_symbol_text;
|
||
|
||
xcoff_psymtab_to_symtab_1 (pst);
|
||
|
||
/* Match with global symbols. This only needs to be done once,
|
||
after all of the symtabs and dependencies have been read in. */
|
||
scan_file_globals (pst->objfile);
|
||
|
||
/* Finish up the debug error message. */
|
||
if (info_verbose)
|
||
printf_filtered ("done.\n");
|
||
}
|
||
}
|
||
|
||
static void
|
||
xcoff_new_init (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
}
|
||
|
||
/* Do initialization in preparation for reading symbols from OBJFILE.
|
||
|
||
We will only be called if this is an XCOFF or XCOFF-like file.
|
||
BFD handles figuring out the format of the file, and code in symfile.c
|
||
uses BFD's determination to vector to us. */
|
||
|
||
static void
|
||
xcoff_symfile_init (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
/* 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 void
|
||
init_stringtab (abfd, offset, objfile)
|
||
bfd *abfd;
|
||
file_ptr offset;
|
||
struct objfile *objfile;
|
||
{
|
||
long length;
|
||
int val;
|
||
unsigned char lengthbuf[4];
|
||
char *strtbl;
|
||
|
||
((struct coff_symfile_info *)objfile->sym_private)->strtbl = NULL;
|
||
|
||
if (bfd_seek (abfd, offset, L_SET) < 0)
|
||
error ("cannot seek to string table in %s: %s",
|
||
bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
|
||
|
||
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 lengthbuf || length < sizeof lengthbuf)
|
||
return;
|
||
|
||
/* 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);
|
||
((struct coff_symfile_info *)objfile->sym_private)->strtbl = strtbl;
|
||
|
||
if (length == sizeof lengthbuf)
|
||
return;
|
||
|
||
val = bfd_read (strtbl + sizeof lengthbuf, 1, length - sizeof lengthbuf,
|
||
abfd);
|
||
|
||
if (val != length - sizeof lengthbuf)
|
||
error ("cannot read string table from %s: %s",
|
||
bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
|
||
if (strtbl[length - 1] != '\0')
|
||
error ("bad symbol file: string table does not end with null character");
|
||
|
||
return;
|
||
}
|
||
|
||
/* If we have not yet seen a function for this psymtab, this is 0. If we
|
||
have seen one, it is the offset in the line numbers of the line numbers
|
||
for the psymtab. */
|
||
static unsigned int first_fun_line_offset;
|
||
|
||
static struct partial_symtab *xcoff_start_psymtab
|
||
PARAMS ((struct objfile *, struct section_offsets *, char *, int,
|
||
struct partial_symbol *, struct partial_symbol *));
|
||
|
||
/* Allocate and partially fill a partial symtab. It will be
|
||
completely filled at the end of the symbol list.
|
||
|
||
SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
|
||
is the address relative to which its symbols are (incremental) or 0
|
||
(normal). */
|
||
|
||
static struct partial_symtab *
|
||
xcoff_start_psymtab (objfile, section_offsets,
|
||
filename, first_symnum, global_syms, static_syms)
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
char *filename;
|
||
int first_symnum;
|
||
struct partial_symbol *global_syms;
|
||
struct partial_symbol *static_syms;
|
||
{
|
||
struct partial_symtab *result =
|
||
start_psymtab_common (objfile, section_offsets,
|
||
filename,
|
||
/* We fill in textlow later. */
|
||
0,
|
||
global_syms, static_syms);
|
||
|
||
result->read_symtab_private = (char *)
|
||
obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc));
|
||
((struct symloc *)result->read_symtab_private)->first_symnum = first_symnum;
|
||
result->read_symtab = xcoff_psymtab_to_symtab;
|
||
|
||
/* Deduce the source language from the filename for this psymtab. */
|
||
psymtab_language = deduce_language_from_filename (filename);
|
||
|
||
return result;
|
||
}
|
||
|
||
static struct partial_symtab *xcoff_end_psymtab
|
||
PARAMS ((struct partial_symtab *, char **, int, int,
|
||
struct partial_symtab **, int));
|
||
|
||
/* Close off the current usage of PST.
|
||
Returns PST, or NULL if the partial symtab was empty and thrown away.
|
||
|
||
CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
|
||
|
||
INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
|
||
are the information for includes and dependencies. */
|
||
|
||
static struct partial_symtab *
|
||
xcoff_end_psymtab (pst, include_list, num_includes, capping_symbol_number,
|
||
dependency_list, number_dependencies)
|
||
struct partial_symtab *pst;
|
||
char **include_list;
|
||
int num_includes;
|
||
int capping_symbol_number;
|
||
struct partial_symtab **dependency_list;
|
||
int number_dependencies;
|
||
{
|
||
int i;
|
||
struct objfile *objfile = pst -> objfile;
|
||
|
||
if (capping_symbol_number != -1)
|
||
((struct symloc *)pst->read_symtab_private)->numsyms =
|
||
capping_symbol_number
|
||
- ((struct symloc *)pst->read_symtab_private)->first_symnum;
|
||
((struct symloc *)pst->read_symtab_private)->lineno_off =
|
||
first_fun_line_offset;
|
||
first_fun_line_offset = 0;
|
||
pst->n_global_syms =
|
||
objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
|
||
pst->n_static_syms =
|
||
objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
|
||
|
||
pst->number_of_dependencies = number_dependencies;
|
||
if (number_dependencies)
|
||
{
|
||
pst->dependencies = (struct partial_symtab **)
|
||
obstack_alloc (&objfile->psymbol_obstack,
|
||
number_dependencies * sizeof (struct partial_symtab *));
|
||
memcpy (pst->dependencies, dependency_list,
|
||
number_dependencies * sizeof (struct partial_symtab *));
|
||
}
|
||
else
|
||
pst->dependencies = 0;
|
||
|
||
for (i = 0; i < num_includes; i++)
|
||
{
|
||
struct partial_symtab *subpst =
|
||
allocate_psymtab (include_list[i], objfile);
|
||
|
||
subpst->section_offsets = pst->section_offsets;
|
||
subpst->read_symtab_private =
|
||
(char *) obstack_alloc (&objfile->psymbol_obstack,
|
||
sizeof (struct symloc));
|
||
((struct symloc *)subpst->read_symtab_private)->first_symnum = 0;
|
||
((struct symloc *)subpst->read_symtab_private)->numsyms = 0;
|
||
subpst->textlow = 0;
|
||
subpst->texthigh = 0;
|
||
|
||
/* We could save slight bits of space by only making one of these,
|
||
shared by the entire set of include files. FIXME-someday. */
|
||
subpst->dependencies = (struct partial_symtab **)
|
||
obstack_alloc (&objfile->psymbol_obstack,
|
||
sizeof (struct partial_symtab *));
|
||
subpst->dependencies[0] = pst;
|
||
subpst->number_of_dependencies = 1;
|
||
|
||
subpst->globals_offset =
|
||
subpst->n_global_syms =
|
||
subpst->statics_offset =
|
||
subpst->n_static_syms = 0;
|
||
|
||
subpst->readin = 0;
|
||
subpst->symtab = 0;
|
||
subpst->read_symtab = pst->read_symtab;
|
||
}
|
||
|
||
sort_pst_symbols (pst);
|
||
|
||
/* If there is already a psymtab or symtab for a file of this name,
|
||
remove it. (If there is a symtab, more drastic things also
|
||
happen.) This happens in VxWorks. */
|
||
free_named_symtabs (pst->filename);
|
||
|
||
if (num_includes == 0
|
||
&& number_dependencies == 0
|
||
&& pst->n_global_syms == 0
|
||
&& pst->n_static_syms == 0)
|
||
{
|
||
/* Throw away this psymtab, it's empty. We can't deallocate it, since
|
||
it is on the obstack, but we can forget to chain it on the list. */
|
||
/* Empty psymtabs happen as a result of header files which don't have
|
||
any symbols in them. There can be a lot of them. But this check
|
||
is wrong, in that a psymtab with N_SLINE entries but nothing else
|
||
is not empty, but we don't realize that. Fixing that without slowing
|
||
things down might be tricky. (FIXME: For XCOFF, it shouldn't be
|
||
tricky at all). */
|
||
struct partial_symtab *prev_pst;
|
||
|
||
/* First, snip it out of the psymtab chain */
|
||
|
||
if (pst->objfile->psymtabs == pst)
|
||
pst->objfile->psymtabs = pst->next;
|
||
else
|
||
for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next)
|
||
if (prev_pst->next == pst)
|
||
prev_pst->next = pst->next;
|
||
|
||
/* Next, put it on a free list for recycling */
|
||
|
||
pst->next = pst->objfile->free_psymtabs;
|
||
pst->objfile->free_psymtabs = pst;
|
||
|
||
/* Indicate that psymtab was thrown away. */
|
||
pst = (struct partial_symtab *)NULL;
|
||
}
|
||
return pst;
|
||
}
|
||
|
||
static void swap_sym PARAMS ((struct internal_syment *,
|
||
union internal_auxent *, char **, char **,
|
||
unsigned int *,
|
||
struct objfile *));
|
||
|
||
/* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
|
||
*SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
|
||
the symbol and its auxents. */
|
||
|
||
static void
|
||
swap_sym (symbol, aux, name, raw, symnump, objfile)
|
||
struct internal_syment *symbol;
|
||
union internal_auxent *aux;
|
||
char **name;
|
||
char **raw;
|
||
unsigned int *symnump;
|
||
struct objfile *objfile;
|
||
{
|
||
bfd_coff_swap_sym_in (objfile->obfd, *raw, symbol);
|
||
if (symbol->n_zeroes)
|
||
{
|
||
/* If it's exactly E_SYMNMLEN characters long it isn't
|
||
'\0'-terminated. */
|
||
if (symbol->n_name[E_SYMNMLEN - 1] != '\0')
|
||
{
|
||
/* FIXME: wastes memory for symbols which we don't end up putting
|
||
into the minimal symbols. */
|
||
char *p;
|
||
p = obstack_alloc (&objfile->psymbol_obstack, E_SYMNMLEN + 1);
|
||
strncpy (p, symbol->n_name, E_SYMNMLEN);
|
||
p[E_SYMNMLEN] = '\0';
|
||
*name = p;
|
||
}
|
||
else
|
||
/* Point to the unswapped name as that persists as long as the
|
||
objfile does. */
|
||
*name = ((struct external_syment *)*raw)->e.e_name;
|
||
}
|
||
else if (symbol->n_sclass & 0x80)
|
||
{
|
||
*name = ((struct coff_symfile_info *)objfile->sym_private)->debugsec
|
||
+ symbol->n_offset;
|
||
}
|
||
else
|
||
{
|
||
*name = ((struct coff_symfile_info *)objfile->sym_private)->strtbl
|
||
+ symbol->n_offset;
|
||
}
|
||
++*symnump;
|
||
*raw += coff_data (objfile->obfd)->local_symesz;
|
||
if (symbol->n_numaux > 0)
|
||
{
|
||
bfd_coff_swap_aux_in (objfile->obfd, *raw, symbol->n_type,
|
||
symbol->n_sclass, 0, symbol->n_numaux, aux);
|
||
|
||
*symnump += symbol->n_numaux;
|
||
*raw += coff_data (objfile->obfd)->local_symesz * symbol->n_numaux;
|
||
}
|
||
}
|
||
|
||
static void
|
||
scan_xcoff_symtab (section_offsets, objfile)
|
||
struct section_offsets *section_offsets;
|
||
struct objfile *objfile;
|
||
{
|
||
int toc_offset = 0; /* toc offset value in data section. */
|
||
char *filestring;
|
||
|
||
char *namestring;
|
||
int nsl;
|
||
int past_first_source_file = 0;
|
||
CORE_ADDR last_o_file_start = 0;
|
||
struct cleanup *back_to;
|
||
bfd *abfd;
|
||
unsigned int nsyms;
|
||
|
||
/* Current partial symtab */
|
||
struct partial_symtab *pst;
|
||
|
||
/* List of current psymtab's include files */
|
||
char **psymtab_include_list;
|
||
int includes_allocated;
|
||
int includes_used;
|
||
|
||
/* Index within current psymtab dependency list */
|
||
struct partial_symtab **dependency_list;
|
||
int dependencies_used, dependencies_allocated;
|
||
|
||
char *sraw_symbol;
|
||
struct internal_syment symbol;
|
||
union internal_auxent main_aux;
|
||
unsigned int ssymnum;
|
||
|
||
char *last_csect_name = NULL; /* last seen csect's name and value */
|
||
CORE_ADDR last_csect_val;
|
||
int last_csect_sec;
|
||
int misc_func_recorded; /* true if any misc. function */
|
||
|
||
pst = (struct partial_symtab *) 0;
|
||
|
||
includes_allocated = 30;
|
||
includes_used = 0;
|
||
psymtab_include_list = (char **) alloca (includes_allocated *
|
||
sizeof (char *));
|
||
|
||
dependencies_allocated = 30;
|
||
dependencies_used = 0;
|
||
dependency_list =
|
||
(struct partial_symtab **) alloca (dependencies_allocated *
|
||
sizeof (struct partial_symtab *));
|
||
|
||
last_source_file = NULL;
|
||
|
||
abfd = objfile->obfd;
|
||
|
||
sraw_symbol = ((struct coff_symfile_info *)objfile->sym_private)->symtbl;
|
||
nsyms = ((struct coff_symfile_info *)objfile->sym_private)->symtbl_num_syms;
|
||
ssymnum = 0;
|
||
while (ssymnum < nsyms)
|
||
{
|
||
int sclass = ((struct external_syment *)sraw_symbol)->e_sclass[0];
|
||
/* This is the type we pass to partial-stab.h. A less kludgy solution
|
||
would be to break out partial-stab.h into its various parts--shuffle
|
||
off the DBXREAD_ONLY stuff to dbxread.c, and make separate
|
||
pstab-norm.h (for most types), pstab-sol.h (for N_SOL), etc. */
|
||
int stype;
|
||
|
||
QUIT;
|
||
|
||
switch (sclass)
|
||
{
|
||
case C_EXT:
|
||
case C_HIDEXT:
|
||
{
|
||
/* The CSECT auxent--always the last auxent. */
|
||
union internal_auxent csect_aux;
|
||
unsigned int symnum_before = ssymnum;
|
||
|
||
swap_sym (&symbol, &main_aux, &namestring, &sraw_symbol,
|
||
&ssymnum, objfile);
|
||
if (symbol.n_numaux > 1)
|
||
{
|
||
bfd_coff_swap_aux_in
|
||
(objfile->obfd,
|
||
sraw_symbol - coff_data(abfd)->local_symesz,
|
||
symbol.n_type,
|
||
symbol.n_sclass,
|
||
symbol.n_numaux - 1,
|
||
symbol.n_numaux,
|
||
&csect_aux);
|
||
}
|
||
else
|
||
csect_aux = main_aux;
|
||
|
||
switch (csect_aux.x_csect.x_smtyp & 0x7)
|
||
{
|
||
case XTY_SD:
|
||
switch (csect_aux.x_csect.x_smclas)
|
||
{
|
||
case XMC_PR:
|
||
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)
|
||
{
|
||
RECORD_MINIMAL_SYMBOL
|
||
(last_csect_name, last_csect_val,
|
||
mst_text, last_csect_sec,
|
||
objfile);
|
||
}
|
||
|
||
if (pst != NULL)
|
||
{
|
||
/* We have to allocate one psymtab for
|
||
each program csect, because their text
|
||
sections need not be adjacent. */
|
||
xcoff_end_psymtab
|
||
(pst, psymtab_include_list,
|
||
includes_used,
|
||
symnum_before,
|
||
dependency_list, dependencies_used);
|
||
includes_used = 0;
|
||
dependencies_used = 0;
|
||
/* Give all psymtabs for this source file the same
|
||
name. */
|
||
pst = xcoff_start_psymtab
|
||
(objfile, section_offsets,
|
||
filestring,
|
||
symnum_before,
|
||
objfile->global_psymbols.next,
|
||
objfile->static_psymbols.next);
|
||
}
|
||
}
|
||
if (namestring && namestring[0] == '.')
|
||
{
|
||
last_csect_name = namestring;
|
||
last_csect_val = symbol.n_value;
|
||
last_csect_sec =
|
||
secnum_to_section (symbol.n_scnum, objfile);
|
||
}
|
||
if (pst != NULL)
|
||
{
|
||
CORE_ADDR highval =
|
||
symbol.n_value + csect_aux.x_csect.x_scnlen.l;
|
||
if (highval > pst->texthigh)
|
||
pst->texthigh = highval;
|
||
if (pst->textlow == 0 || symbol.n_value < pst->textlow)
|
||
pst->textlow = symbol.n_value;
|
||
}
|
||
misc_func_recorded = 0;
|
||
break;
|
||
case XMC_RW:
|
||
break;
|
||
case XMC_TC0:
|
||
if (toc_offset)
|
||
warning ("More than one XMC_TC0 symbol found.");
|
||
toc_offset = symbol.n_value;
|
||
break;
|
||
case XMC_TC:
|
||
/* These symbols tell us where the TOC entry for a
|
||
variable is, not the variable itself. */
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
break;
|
||
|
||
case XTY_LD:
|
||
switch (csect_aux.x_csect.x_smclas)
|
||
{
|
||
case XMC_PR:
|
||
{
|
||
/* A function entry point. */
|
||
char *namestr = namestring;
|
||
|
||
if (first_fun_line_offset == 0)
|
||
first_fun_line_offset =
|
||
main_aux.x_sym.x_fcnary.x_fcn.x_lnnoptr;
|
||
if (namestr[0] == '.')
|
||
++namestr;
|
||
prim_record_minimal_symbol_and_info
|
||
(namestr, symbol.n_value, mst_text,
|
||
NULL, secnum_to_section (symbol.n_scnum, objfile),
|
||
objfile);
|
||
misc_func_recorded = 1;
|
||
|
||
/* We also create full symbols for these, so
|
||
better make a partial symbol. This seems bogus
|
||
to me, but I'm not going to try to fix it now.
|
||
(Note that allocate_space_in_inferior can't
|
||
yet deal with a minimal symbol for malloc on xcoff
|
||
because it doesn't understand the fact that
|
||
function pointers don't just contain the address of
|
||
the function). */
|
||
ADD_PSYMBOL_ADDR_TO_LIST (namestr, strlen (namestr),
|
||
VAR_NAMESPACE, LOC_BLOCK,
|
||
objfile->global_psymbols,
|
||
symbol.n_value,
|
||
psymtab_language, objfile);
|
||
}
|
||
break;
|
||
case XMC_GL:
|
||
/* shared library function trampoline code entry
|
||
point. */
|
||
|
||
/* record trampoline code entries as
|
||
mst_solib_trampoline symbol. When we lookup mst
|
||
symbols, we will choose mst_text over
|
||
mst_solib_trampoline. */
|
||
RECORD_MINIMAL_SYMBOL
|
||
(namestring, symbol.n_value,
|
||
mst_solib_trampoline,
|
||
secnum_to_section (symbol.n_scnum, objfile),
|
||
objfile);
|
||
break;
|
||
|
||
case XMC_DS:
|
||
/* The symbols often have the same names as
|
||
debug symbols for functions, and confuse
|
||
lookup_symbol. */
|
||
break;
|
||
|
||
default:
|
||
|
||
/* xlc puts each variable in a separate csect,
|
||
so we get an XTY_SD for each variable. But
|
||
gcc puts several variables in a csect, so
|
||
that each variable only gets an XTY_LD. We
|
||
still need to record them. This will
|
||
typically be XMC_RW; I suspect XMC_RO and
|
||
XMC_BS might be possible too. */
|
||
|
||
/* FIXME: Shouldn't these be going into the minimal
|
||
symbols instead of partial/full symbols? */
|
||
|
||
ADD_PSYMBOL_ADDR_TO_LIST (namestring, strlen (namestring),
|
||
VAR_NAMESPACE, LOC_STATIC,
|
||
objfile->global_psymbols,
|
||
symbol.n_value,
|
||
psymtab_language, objfile);
|
||
break;
|
||
}
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
case C_FILE:
|
||
{
|
||
unsigned int symnum_before;
|
||
|
||
symnum_before = ssymnum;
|
||
swap_sym (&symbol, &main_aux, &namestring, &sraw_symbol,
|
||
&ssymnum, objfile);
|
||
|
||
/* 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. */
|
||
|
||
RECORD_MINIMAL_SYMBOL
|
||
(last_csect_name, last_csect_val,
|
||
mst_text, last_csect_sec, objfile);
|
||
}
|
||
|
||
if (pst)
|
||
{
|
||
xcoff_end_psymtab (pst, psymtab_include_list, includes_used,
|
||
symnum_before,
|
||
dependency_list, dependencies_used);
|
||
includes_used = 0;
|
||
dependencies_used = 0;
|
||
}
|
||
first_fun_line_offset = 0;
|
||
|
||
/* XCOFF, according to the AIX 3.2 documentation, puts the
|
||
filename in cs->c_name. But xlc 1.3.0.2 has decided to
|
||
do things the standard COFF way and put it in the auxent.
|
||
We use the auxent if the symbol is ".file" and an auxent
|
||
exists, otherwise use the symbol itself. */
|
||
if (!strcmp (namestring, ".file") && symbol.n_numaux > 0)
|
||
{
|
||
filestring = coff_getfilename (&main_aux, objfile);
|
||
}
|
||
else
|
||
filestring = namestring;
|
||
|
||
pst = xcoff_start_psymtab (objfile, section_offsets,
|
||
filestring,
|
||
symnum_before,
|
||
objfile->global_psymbols.next,
|
||
objfile->static_psymbols.next);
|
||
last_csect_name = NULL;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
{
|
||
static struct complaint msg =
|
||
{"Storage class %d not recognized during scan", 0, 0};
|
||
complain (&msg, sclass);
|
||
}
|
||
/* FALLTHROUGH */
|
||
|
||
/* C_FCN is .bf and .ef symbols. I think it is sufficient
|
||
to handle only the C_FUN and C_EXT. */
|
||
case C_FCN:
|
||
|
||
case C_BSTAT:
|
||
case C_ESTAT:
|
||
case C_ARG:
|
||
case C_REGPARM:
|
||
case C_REG:
|
||
case C_TPDEF:
|
||
case C_STRTAG:
|
||
case C_UNTAG:
|
||
case C_ENTAG:
|
||
case C_LABEL:
|
||
case C_NULL:
|
||
|
||
/* C_EINCL means we are switching back to the main file. But there
|
||
is no reason to care; the only thing we want to know about
|
||
includes is the names of all the included (.h) files. */
|
||
case C_EINCL:
|
||
|
||
case C_BLOCK:
|
||
|
||
/* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
|
||
used instead. */
|
||
case C_STAT:
|
||
|
||
/* I don't think the name of the common block (as opposed to the
|
||
variables within it) is something which is user visible
|
||
currently. */
|
||
case C_BCOMM:
|
||
case C_ECOMM:
|
||
|
||
case C_PSYM:
|
||
case C_RPSYM:
|
||
|
||
/* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
|
||
so C_LSYM would appear to be only for locals. */
|
||
case C_LSYM:
|
||
|
||
case C_AUTO:
|
||
case C_RSYM:
|
||
{
|
||
/* We probably could save a few instructions by assuming that
|
||
C_LSYM, C_PSYM, etc., never have auxents. */
|
||
int naux1 =
|
||
((struct external_syment *)sraw_symbol)->e_numaux[0] + 1;
|
||
ssymnum += naux1;
|
||
sraw_symbol += sizeof (struct external_syment) * naux1;
|
||
}
|
||
break;
|
||
|
||
case C_BINCL:
|
||
stype = N_SOL;
|
||
goto pstab;
|
||
|
||
case C_FUN:
|
||
/* The value of the C_FUN is not the address of the function (it
|
||
appears to be the address before linking), but as long as it
|
||
is smaller than the actual address, then find_pc_partial_function
|
||
will use the minimal symbols instead. I hope. */
|
||
|
||
case C_GSYM:
|
||
case C_ECOML:
|
||
case C_DECL:
|
||
case C_STSYM:
|
||
stype = N_LSYM;
|
||
pstab:;
|
||
swap_sym (&symbol, &main_aux, &namestring, &sraw_symbol,
|
||
&ssymnum, objfile);
|
||
#define CUR_SYMBOL_TYPE stype
|
||
#define CUR_SYMBOL_VALUE symbol.n_value
|
||
|
||
/* START_PSYMTAB and END_PSYMTAB are never used, because they are only
|
||
called from DBXREAD_ONLY or N_SO code. Likewise for the symnum
|
||
variable. */
|
||
#define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms) 0
|
||
#define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\
|
||
do {} while (0)
|
||
/* We have already set the namestring. */
|
||
#define SET_NAMESTRING() 0
|
||
|
||
#include "partial-stab.h"
|
||
}
|
||
}
|
||
#if 0
|
||
/* What is this? */
|
||
/* If there's stuff to be cleaned up, clean it up. */
|
||
if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */
|
||
/*FIXME, does this have a bug at start address 0? */
|
||
&& last_o_file_start
|
||
&& objfile -> ei.entry_point < bufp->n_value
|
||
&& objfile -> ei.entry_point >= last_o_file_start)
|
||
{
|
||
objfile -> ei.entry_file_lowpc = last_o_file_start;
|
||
objfile -> ei.entry_file_highpc = bufp->n_value;
|
||
}
|
||
#endif
|
||
|
||
if (pst)
|
||
{
|
||
xcoff_end_psymtab (pst, psymtab_include_list, includes_used,
|
||
ssymnum,
|
||
dependency_list, dependencies_used);
|
||
}
|
||
|
||
/* 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. */
|
||
|
||
#ifndef FAKING_RS6000
|
||
xcoff_add_toc_to_loadinfo (toc_offset);
|
||
#endif
|
||
}
|
||
|
||
/* Scan and build partial symbols for a symbol file.
|
||
We have been initialized by a call to dbx_symfile_init, which
|
||
put all the relevant info into a "struct dbx_symfile_info",
|
||
hung off the objfile structure.
|
||
|
||
SECTION_OFFSETS contains offsets relative to which the symbols in the
|
||
various sections are (depending where the sections were actually loaded).
|
||
MAINLINE is true if we are reading the main symbol
|
||
table (as opposed to a shared lib or dynamically loaded file). */
|
||
|
||
static void
|
||
xcoff_initial_scan (objfile, section_offsets, mainline)
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
int mainline; /* FIXME comments above */
|
||
{
|
||
bfd *abfd;
|
||
int val;
|
||
struct cleanup *back_to;
|
||
int num_symbols; /* # of symbols */
|
||
file_ptr symtab_offset; /* symbol table and */
|
||
file_ptr stringtab_offset; /* string table file offsets */
|
||
struct coff_symfile_info *info;
|
||
char *name;
|
||
unsigned int size;
|
||
|
||
#ifndef FAKING_RS6000
|
||
/* Initialize load info structure. */
|
||
if (mainline)
|
||
xcoff_init_loadinfo ();
|
||
#endif
|
||
|
||
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);
|
||
|
||
if (num_symbols > 0)
|
||
{
|
||
/* Read the string table. */
|
||
init_stringtab (abfd, stringtab_offset, objfile);
|
||
|
||
/* Read the .debug section, if present. */
|
||
{
|
||
sec_ptr secp;
|
||
bfd_size_type length;
|
||
char *debugsec = NULL;
|
||
|
||
secp = bfd_get_section_by_name (abfd, ".debug");
|
||
if (secp)
|
||
{
|
||
length = bfd_section_size (abfd, secp);
|
||
if (length)
|
||
{
|
||
debugsec =
|
||
(char *) obstack_alloc (&objfile->symbol_obstack, length);
|
||
|
||
if (!bfd_get_section_contents (abfd, secp, debugsec,
|
||
(file_ptr) 0, length))
|
||
{
|
||
error ("Error reading .debug section of `%s': %s",
|
||
name, bfd_errmsg (bfd_get_error ()));
|
||
}
|
||
}
|
||
}
|
||
((struct coff_symfile_info *)objfile->sym_private)->debugsec =
|
||
debugsec;
|
||
}
|
||
}
|
||
|
||
/* Read the symbols. We keep them in core because we will want to
|
||
access them randomly in read_symbol*. */
|
||
val = bfd_seek (abfd, symtab_offset, L_SET);
|
||
if (val < 0)
|
||
error ("Error reading symbols from %s: %s",
|
||
name, bfd_errmsg (bfd_get_error ()));
|
||
size = coff_data (abfd)->local_symesz * num_symbols;
|
||
((struct coff_symfile_info *)objfile->sym_private)->symtbl =
|
||
obstack_alloc (&objfile->symbol_obstack, size);
|
||
((struct coff_symfile_info *)objfile->sym_private)->symtbl_num_syms =
|
||
num_symbols;
|
||
|
||
val = bfd_read (((struct coff_symfile_info *)objfile->sym_private)->symtbl,
|
||
size, 1, abfd);
|
||
if (val != size)
|
||
perror_with_name ("reading symbol table");
|
||
|
||
/* If we are reinitializing, or if we have never loaded syms yet, init */
|
||
if (mainline
|
||
|| objfile->global_psymbols.size == 0
|
||
|| objfile->static_psymbols.size == 0)
|
||
/* I'm not sure how how good num_symbols is; the rule of thumb in
|
||
init_psymbol_list was developed for a.out. On the one hand,
|
||
num_symbols includes auxents. On the other hand, it doesn't
|
||
include N_SLINE. */
|
||
init_psymbol_list (objfile, num_symbols);
|
||
|
||
pending_blocks = 0;
|
||
back_to = make_cleanup (really_free_pendings, 0);
|
||
|
||
init_minimal_symbol_collection ();
|
||
make_cleanup (discard_minimal_symbols, 0);
|
||
|
||
/* Now that the symbol table data of the executable file are all in core,
|
||
process them and define symbols accordingly. */
|
||
|
||
scan_xcoff_symtab (section_offsets, objfile);
|
||
|
||
/* Install any minimal symbols that have been collected as the current
|
||
minimal symbols for this objfile. */
|
||
|
||
install_minimal_symbols (objfile);
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
static struct section_offsets *
|
||
xcoff_symfile_offsets (objfile, addr)
|
||
struct objfile *objfile;
|
||
CORE_ADDR addr;
|
||
{
|
||
struct section_offsets *section_offsets;
|
||
int i;
|
||
|
||
objfile->num_sections = SECT_OFF_MAX;
|
||
section_offsets = (struct section_offsets *)
|
||
obstack_alloc
|
||
(&objfile -> psymbol_obstack,
|
||
sizeof (struct section_offsets)
|
||
+ sizeof (section_offsets->offsets) * objfile->num_sections);
|
||
|
||
/* syms_from_objfile kindly subtracts from addr the bfd_section_vma
|
||
of the .text section. This strikes me as wrong--whether the
|
||
offset to be applied to symbol reading is relative to the start
|
||
address of the section depends on the symbol format. In any
|
||
event, this whole "addr" concept is pretty broken (it doesn't
|
||
handle any section but .text sensibly), so just ignore the addr
|
||
parameter and use 0. rs6000-nat.c will set the correct section
|
||
offsets via objfile_relocate. */
|
||
for (i = 0; i < objfile->num_sections; ++i)
|
||
ANOFFSET (section_offsets, i) = 0;
|
||
|
||
return section_offsets;
|
||
}
|
||
|
||
/* Register our ability to parse symbols for xcoff BFD files. */
|
||
|
||
static struct sym_fns xcoff_sym_fns =
|
||
{
|
||
|
||
/* Because the bfd uses coff_flavour, we need to specially kludge
|
||
the flavour. It is possible that coff and xcoff should be merged as
|
||
they do have fundamental similarities (for example, the extra storage
|
||
classes used for stabs could presumably be recognized in any COFF file).
|
||
However, in addition to obvious things like all the csect hair, there are
|
||
some subtler differences between xcoffread.c and coffread.c, notably
|
||
the fact that coffread.c has no need to read in all the symbols, but
|
||
xcoffread.c reads all the symbols and does in fact randomly access them
|
||
(in C_BSTAT and line number processing). */
|
||
|
||
(enum bfd_flavour)-1,
|
||
|
||
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_initial_scan, /* 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);
|
||
|
||
/* Initialize symbol template later used for arguments. Its other
|
||
fields are zero, or are filled in later. */
|
||
SYMBOL_NAME (&parmsym) = "";
|
||
SYMBOL_INIT_LANGUAGE_SPECIFIC (&parmsym, language_c);
|
||
SYMBOL_NAMESPACE (&parmsym) = VAR_NAMESPACE;
|
||
SYMBOL_CLASS (&parmsym) = LOC_ARG;
|
||
|
||
func_symbol_type = init_type (TYPE_CODE_FUNC, 1, 0,
|
||
"<function, no debug info>", NULL);
|
||
TYPE_TARGET_TYPE (func_symbol_type) = builtin_type_int;
|
||
var_symbol_type =
|
||
init_type (TYPE_CODE_INT, TARGET_INT_BIT / HOST_CHAR_BIT, 0,
|
||
"<variable, no debug info>", NULL);
|
||
}
|