home *** CD-ROM | disk | FTP | other *** search
- /* Read Amigados object files for GDB.
- Copyright 1991, 1992, 1994 Free Software Foundation, Inc.
- Converted to Amigados format files by Leonard Norrgard. Original
- was paread.c by Fred Fish.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "defs.h"
- #include "bfd.h"
- #include <time.h> /* For time_t in libbfd.h. */
- #include <sys/types.h> /* For time_t, if not in time.h. */
- #include "libbfd.h"
- #include "libamiga.h"
- #include "symtab.h"
- #include "symfile.h"
- #include "objfiles.h"
- #include "buildsym.h"
- #include "stabsread.h"
- #include "gdb-stabs.h"
- #include "complaints.h"
- #include <string.h>
- #include "demangle.h"
- #include <sys/file.h>
-
- #include "aout/aout64.h"
-
- /* Various things we might complain about... */
-
- static void
- amiga_symfile_init PARAMS ((struct objfile *));
-
- static void
- amiga_new_init PARAMS ((struct objfile *));
-
- extern void
- amiga_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
-
- static void
- amiga_symfile_finish PARAMS ((struct objfile *));
-
- static void
- free_amigainfo PARAMS ((PTR));
-
- static struct section_offsets *
- amiga_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR));
-
- static void
- record_minimal_symbol PARAMS ((char *, CORE_ADDR,
- enum minimal_symbol_type,
- struct objfile *));
-
- static void
- record_minimal_symbol (name, address, ms_type, objfile)
- char *name;
- CORE_ADDR address;
- enum minimal_symbol_type ms_type;
- struct objfile *objfile;
- {
- name = obsavestring (name, strlen (name), &objfile -> symbol_obstack);
- prim_record_minimal_symbol (name, address, ms_type, objfile);
- }
-
- /* This cleans up the objfile's sym_stab_info pointer, and the chain of
- stab_section_info's, that might be dangling from it. */
-
- static void
- free_amigainfo (objp)
- PTR objp;
- {
- struct objfile *objfile = (struct objfile *)objp;
- struct dbx_symfile_info *dbxinfo = (struct dbx_symfile_info *)
- objfile->sym_stab_info;
- struct stab_section_info *ssi, *nssi;
-
- ssi = dbxinfo->stab_section_info;
- while (ssi)
- {
- nssi = ssi->next;
- mfree (objfile->md, ssi);
- ssi = nssi;
- }
-
- dbxinfo->stab_section_info = 0; /* Just say No mo info about this. */
- }
-
- /* 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 we may be reading stabs from an amigados file. */
-
- static void
- amiga_new_init (ignore)
- struct objfile *ignore;
- {
- stabsread_new_init ();
- buildsym_new_init ();
- }
-
- /* 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
- amiga_symfile_finish (objfile)
- struct objfile *objfile;
- {
- if (objfile -> sym_stab_info != NULL)
- {
- mfree (objfile -> md, objfile -> sym_stab_info);
- }
- }
-
- /* Amigados 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.
-
- This routine is almost a complete ripoff of dbx_symfile_init. The
- common parts of these routines should be extracted and used instead of
- duplicating this code. FIXME. */
-
- static void
- amiga_symfile_init (objfile)
- struct objfile *objfile;
- {
- int val;
- bfd *sym_bfd = objfile->obfd;
- char *name = bfd_get_filename (sym_bfd);
-
- /* Allocate struct to keep track of the symfile */
- objfile->sym_stab_info = (PTR)
- xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
- memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
-
- /* FIXME POKING INSIDE BFD DATA STRUCTURES */
- #define STRING_TABLE_OFFSET adata(sym_bfd).str_filepos
- #define SYMBOL_TABLE_OFFSET adata(sym_bfd).sym_filepos
-
- /* FIXME POKING INSIDE BFD DATA STRUCTURES */
-
- DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
- DBX_TEXT_SECT (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
- if (!DBX_TEXT_SECT (objfile))
- error ("Can't find .text section in symbol file");
-
- /* FIXME: I suspect this should be external_nlist. The size of host
- types like long and bfd_vma should not affect how we read the
- file. */
- DBX_SYMBOL_SIZE (objfile) = sizeof (struct internal_nlist);
- DBX_SYMCOUNT (objfile) = AMIGA_DATA(sym_bfd)->symtab_size
- / DBX_SYMBOL_SIZE (objfile);
- DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
-
- /* Read the string table and stash it away in the psymbol_obstack. It is
- only needed as long as we need to expand psymbols into full symbols,
- so when we blow away the psymbol the string table goes away as well.
- Note that gdb used to use the results of attempting to malloc the
- string table, based on the size it read, as a form of sanity check
- for botched byte swapping, on the theory that a byte swapped string
- table size would be so totally bogus that the malloc would fail. Now
- that we put in on the psymbol_obstack, we can't do this since gdb gets
- a fatal error (out of virtual memory) if the size is bogus. We can
- however at least check to see if the size is zero or some negative
- value. */
-
- DBX_STRINGTAB_SIZE (objfile) = AMIGA_DATA (sym_bfd)->stringtab_size;
-
- if (DBX_SYMCOUNT (objfile) == 0
- || DBX_STRINGTAB_SIZE (objfile) == 0)
- return;
-
- if (DBX_STRINGTAB_SIZE (objfile) <= 0
- || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
- error ("ridiculous string table size (%d bytes).",
- DBX_STRINGTAB_SIZE (objfile));
-
- DBX_STRINGTAB (objfile) =
- (char *) obstack_alloc (&objfile -> psymbol_obstack,
- DBX_STRINGTAB_SIZE (objfile));
-
- /* Now read in the string table in one big gulp. */
-
- val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, L_SET);
- if (val < 0)
- perror_with_name (name);
- val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1,
- sym_bfd);
- if (val == 0)
- error ("End of file reading string table");
- else if (val < 0)
- /* It's possible bfd_read should be setting bfd_error, and we should be
- checking that. But currently it doesn't set bfd_error. */
- perror_with_name (name);
- else if (val != DBX_STRINGTAB_SIZE (objfile))
- error ("Short read reading string table");
- }
-
- /* Amiga specific parsing routine for section offsets.
-
- Plain and simple for now. */
-
- static struct section_offsets *
- amiga_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) * (SECT_OFF_MAX-1));
-
- for (i = 0; i < SECT_OFF_MAX; i++)
- ANOFFSET (section_offsets, i) = addr;
-
- return section_offsets;
- }
-
- /* Register that we are able to handle Amigados object file formats. */
-
- static struct sym_fns amiga_sym_fns =
- {
- bfd_target_amiga_flavour,
- amiga_new_init, /* sym_new_init: init anything gbl to entire symtab */
- amiga_symfile_init, /* sym_init: read initial info, setup for sym_read() */
- amiga_symfile_read, /* sym_read: read a symbol file into symtab */
- amiga_symfile_finish, /* sym_finish: finished with file, cleanup */
- amiga_symfile_offsets,/* sym_offsets: Translate ext. to int. relocation */
- NULL /* next: pointer to next struct sym_fns */
- };
-
- void
- _initialize_amigaread ()
- {
- add_symtab_fns (&amiga_sym_fns);
- }
-