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-rw-r--r--gdb/nlmread.c261
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diff --git a/gdb/nlmread.c b/gdb/nlmread.c
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--- a/gdb/nlmread.c
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-/* Read NLM (NetWare Loadable Module) format executable files for GDB.
- Copyright 1993, 1994, 1998 Free Software Foundation, Inc.
- Written by Fred Fish at Cygnus Support (fnf@cygnus.com).
-
-This file is part of GDB.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#include "defs.h"
-#include "gdb_string.h"
-#include "bfd.h"
-#include "symtab.h"
-#include "symfile.h"
-#include "objfiles.h"
-#include "gdb-stabs.h"
-#include "buildsym.h"
-#include "stabsread.h"
-
-static void
-nlm_new_init PARAMS ((struct objfile *));
-
-static void
-nlm_symfile_init PARAMS ((struct objfile *));
-
-static void
-nlm_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
-
-static void
-nlm_symfile_finish PARAMS ((struct objfile *));
-
-static void
-nlm_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *));
-
-/* Initialize anything that needs initializing when a completely new symbol
- file is specified (not just adding some symbols from another file, e.g. a
- shared library).
-
- We reinitialize buildsym, since gdb will be able to read stabs from an NLM
- file at some point in the near future. */
-
-static void
-nlm_new_init (ignore)
- struct objfile *ignore;
-{
- stabsread_new_init ();
- buildsym_new_init ();
-}
-
-
-/* NLM specific initialization routine for reading symbols.
-
- It is passed a pointer to a struct sym_fns which contains, among other
- things, the BFD for the file whose symbols are being read, and a slot for
- a pointer to "private data" which we can fill with goodies.
-
- For now at least, we have nothing in particular to do, so this function is
- just a stub. */
-
-static void
-nlm_symfile_init (ignore)
- struct objfile *ignore;
-{
-}
-
-/*
-
-LOCAL FUNCTION
-
- nlm_symtab_read -- read the symbol table of an NLM file
-
-SYNOPSIS
-
- void nlm_symtab_read (bfd *abfd, CORE_ADDR addr,
- struct objfile *objfile)
-
-DESCRIPTION
-
- Given an open bfd, a base address to relocate symbols to, and a
- flag that specifies whether or not this bfd is for an executable
- or not (may be shared library for example), add all the global
- function and data symbols to the minimal symbol table.
-*/
-
-static void
-nlm_symtab_read (abfd, addr, objfile)
- bfd *abfd;
- CORE_ADDR addr;
- struct objfile *objfile;
-{
- long storage_needed;
- asymbol *sym;
- asymbol **symbol_table;
- long number_of_symbols;
- long i;
- struct cleanup *back_to;
- CORE_ADDR symaddr;
- enum minimal_symbol_type ms_type;
-
- storage_needed = bfd_get_symtab_upper_bound (abfd);
- if (storage_needed < 0)
- error ("Can't read symbols from %s: %s", bfd_get_filename (abfd),
- bfd_errmsg (bfd_get_error ()));
- if (storage_needed > 0)
- {
- symbol_table = (asymbol **) xmalloc (storage_needed);
- back_to = make_cleanup (free, symbol_table);
- number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
- if (number_of_symbols < 0)
- error ("Can't read symbols from %s: %s", bfd_get_filename (abfd),
- bfd_errmsg (bfd_get_error ()));
-
- for (i = 0; i < number_of_symbols; i++)
- {
- sym = symbol_table[i];
- if (/*sym -> flags & BSF_GLOBAL*/ 1)
- {
- /* Bfd symbols are section relative. */
- symaddr = sym -> value + sym -> section -> vma;
- /* Relocate all non-absolute symbols by base address. */
- if (sym -> section != &bfd_abs_section)
- symaddr += addr;
-
- /* For non-absolute symbols, use the type of the section
- they are relative to, to intuit text/data. BFD provides
- no way of figuring this out for absolute symbols. */
- if (sym -> section -> flags & SEC_CODE)
- ms_type = mst_text;
- else if (sym -> section -> flags & SEC_DATA)
- ms_type = mst_data;
- else
- ms_type = mst_unknown;
-
- prim_record_minimal_symbol (sym -> name, symaddr, ms_type,
- objfile);
- }
- }
- do_cleanups (back_to);
- }
-}
-
-
-/* Scan and build partial symbols for a symbol file.
- We have been initialized by a call to nlm_symfile_init, which
- currently does nothing.
-
- SECTION_OFFSETS is a set of offsets to apply to relocate the symbols
- in each section. We simplify it down to a single offset for all
- symbols. FIXME.
-
- MAINLINE is true if we are reading the main symbol
- table (as opposed to a shared lib or dynamically loaded file).
-
- This function only does the minimum work necessary for letting the
- user "name" things symbolically; it does not read the entire symtab.
- Instead, it reads the external and static symbols and puts them in partial
- symbol tables. When more extensive information is requested of a
- file, the corresponding partial symbol table is mutated into a full
- fledged symbol table by going back and reading the symbols
- for real.
-
- Note that NLM files have two sets of information that is potentially
- useful for building gdb's minimal symbol table. The first is a list
- of the publically exported symbols, and is currently used to build
- bfd's canonical symbol table. The second is an optional native debugging
- format which contains additional symbols (and possibly duplicates of
- the publically exported symbols). The optional native debugging format
- is not currently used. */
-
-static void
-nlm_symfile_read (objfile, section_offsets, mainline)
- struct objfile *objfile;
- struct section_offsets *section_offsets;
- int mainline;
-{
- bfd *abfd = objfile -> obfd;
- struct cleanup *back_to;
- CORE_ADDR offset;
- struct symbol *mainsym;
-
- init_minimal_symbol_collection ();
- back_to = make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0);
-
- /* FIXME, should take a section_offsets param, not just an offset. */
-
- offset = ANOFFSET (section_offsets, 0);
-
- /* Process the NLM export records, which become the bfd's canonical symbol
- table. */
-
- nlm_symtab_read (abfd, offset, objfile);
-
- stabsect_build_psymtabs (objfile, section_offsets, mainline, ".stab",
- ".stabstr", ".text");
-
- mainsym = lookup_symbol ("main", NULL, VAR_NAMESPACE, NULL, NULL);
-
- if (mainsym
- && SYMBOL_CLASS(mainsym) == LOC_BLOCK)
- {
- objfile->ei.main_func_lowpc = BLOCK_START (SYMBOL_BLOCK_VALUE (mainsym));
- objfile->ei.main_func_highpc = BLOCK_END (SYMBOL_BLOCK_VALUE (mainsym));
- }
-
- /* FIXME: We could locate and read the optional native debugging format
- here and add the symbols to the minimal symbol table. */
-
- /* Install any minimal symbols that have been collected as the current
- minimal symbols for this objfile. */
-
- install_minimal_symbols (objfile);
-
- do_cleanups (back_to);
-}
-
-
-/* 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
-nlm_symfile_finish (objfile)
- struct objfile *objfile;
-{
- if (objfile -> sym_private != NULL)
- {
- mfree (objfile -> md, objfile -> sym_private);
- }
-}
-
-/* Register that we are able to handle NLM file format. */
-
-static struct sym_fns nlm_sym_fns =
-{
- bfd_target_nlm_flavour,
- nlm_new_init, /* sym_new_init: init anything gbl to entire symtab */
- nlm_symfile_init, /* sym_init: read initial info, setup for sym_read() */
- nlm_symfile_read, /* sym_read: read a symbol file into symtab */
- nlm_symfile_finish, /* sym_finish: finished with file, cleanup */
- default_symfile_offsets,
- /* sym_offsets: Translate ext. to int. relocation */
- NULL /* next: pointer to next struct sym_fns */
-};
-
-void
-_initialize_nlmread ()
-{
- add_symtab_fns (&nlm_sym_fns);
-}
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