348 lines
8.8 KiB
C
348 lines
8.8 KiB
C
/* IBM RS/6000 "XCOFF" back-end for BFD.
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Copyright (C) 1990, 1991 Free Software Foundation, Inc.
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Written by Metin G. Ozisik, Mimi Phûông-Thåo Võ, and John Gilmore.
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Archive support from Damon A. Permezel.
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Contributed by IBM Corporation and Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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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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/* This port currently only handles reading object files, except when
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compiled on an RS/6000 host. -- no archive support, no core files.
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In all cases, it does not support writing.
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FIXMEmgo comments are left from Metin Ozisik's original port. */
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/* Internalcoff.h and coffcode.h modify themselves based on this flag. */
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#define RS6000COFF_C 1
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "obstack.h"
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#include "coff/internal.h"
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#include "coff/rs6000.h"
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#include "libcoff.h"
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/* The main body of code is in coffcode.h. */
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/* Can't read rs6000 relocs */
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#define RTYPE2HOWTO(a,b)
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#include "coffcode.h"
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#define coff_archive_p bfd_generic_archive_p
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#define coff_mkarchive _bfd_generic_mkarchive
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#ifdef ARCHIVES_PLEASE
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/* ------------------------------------------------------------------------ */
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/* Support for archive file stuff.. */
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/* Stolen from Damon A. Permezel's `bfd' portation. */
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/* ------------------------------------------------------------------------ */
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#undef coff_openr_next_archived_file
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#define coff_openr_next_archived_file rs6000coff_openr_next_archived_file
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#undef coff_write_armap
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#define coff_write_armap rs6000coff_write_armap
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#undef coff_stat_arch_elt
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#define coff_stat_arch_elt rs6000coff_stat_arch_elt
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#undef coff_snarf_ar_hdr
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#define coff_snarf_ar_hdr rs6000coff_snarf_ar_hdr
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#undef coff_mkarchive
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#define coff_mkarchive rs6000coff_mkarchive
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#undef coff_archive_p
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#define coff_archive_p rs6000coff_archive_p
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#include "/usr/include/ar.h" /* <ar.h> doesn't do it. */
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#define arch_hdr(bfd) \
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((struct ar_hdr *) \
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(((struct areltdata *)((bfd)->arelt_data))->arch_header))
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static boolean
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rs6000coff_mkarchive (abfd)
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bfd *abfd;
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{
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bfd_error = invalid_operation; /* write not supported */
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}
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/* This functions reads an arch header and returns an areltdata pointer, or
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NULL on error.
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Presumes the file pointer is already in the right place (ie pointing
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to the ar_hdr in the file). Moves the file pointer; on success it
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should be pointing to the front of the file contents; on failure it
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could have been moved arbitrarily.
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*/
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struct areltdata *
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rs6000coff_snarf_ar_hdr (abfd)
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bfd *abfd;
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{
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extern int errno;
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struct {
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struct ar_hdr hdr;
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char namebuf[256];
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} h;
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int size;
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struct areltdata *ared;
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unsigned int namelen = 0;
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char *allocptr;
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size = sizeof (h.hdr);
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if (bfd_read(&h.hdr, 1, size, abfd) != size) {
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bfd_error = no_more_archived_files;
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return NULL;
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}
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size = atoi(h.hdr.ar_namlen); /* ar_name[] length */
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size += size & 1;
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if (bfd_read(&h.hdr._ar_name.ar_name[2], 1, size, abfd) != size) {
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bfd_error = no_more_archived_files;
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return NULL;
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}
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if (strncmp(h.hdr._ar_name.ar_fmag + size, AIAFMAG, 2)) {
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bfd_error = malformed_archive;
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return NULL;
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}
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h.hdr._ar_name.ar_name[size] = 0; /* terminate filename */
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/*
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* if the filename is NULL, we're (probably) at the end.
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*/
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if (size == 0) {
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bfd_error = no_more_archived_files;
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return NULL;
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}
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size += sizeof (h.hdr);
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allocptr = bfd_zalloc(abfd, sizeof (*ared) + size);
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if (allocptr == NULL) {
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bfd_error = no_memory;
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return NULL;
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}
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ared = (struct areltdata *) allocptr;
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ared->arch_header = (void *) (allocptr + sizeof (struct areltdata));
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memcpy ((char *) ared->arch_header, &h.hdr, size);
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ared->parsed_size = atoi(h.hdr.ar_size);
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ared->filename = ((AR_HDR*) ared->arch_header)->_ar_name.ar_name;
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return ared;
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}
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/* Stolen directly from archive.c, except it calls rs6000coff_snarf_ar_hdr.
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Why wasn't this part of the transfer vector? */
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bfd *
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rs6000coff_get_elt_at_filepos (archive, filepos)
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bfd *archive;
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file_ptr filepos;
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{
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struct areltdata *new_areldata;
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bfd *n_nfd;
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n_nfd = look_for_bfd_in_cache (archive, filepos);
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if (n_nfd) return n_nfd;
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if (0 != bfd_seek (archive, filepos, SEEK_SET)) {
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bfd_error = system_call_error;
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return NULL;
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}
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if ((new_areldata = rs6000coff_snarf_ar_hdr (archive)) == NULL) return NULL;
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n_nfd = _bfd_create_empty_archive_element_shell (archive);
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if (n_nfd == NULL) {
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bfd_release (archive, (PTR)new_areldata);
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return NULL;
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}
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n_nfd->origin = bfd_tell (archive);
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n_nfd->arelt_data = (PTR) new_areldata;
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n_nfd->filename = new_areldata->filename;
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if (add_bfd_to_cache (archive, filepos, n_nfd))
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return n_nfd;
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/* huh? */
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bfd_release (archive, (PTR)n_nfd);
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bfd_release (archive, (PTR)new_areldata);
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return NULL;
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}
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/*
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* xcoff_openr_next_archived_file - xcoff has nxt/prv seek addrs.
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*/
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static bfd *
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rs6000coff_openr_next_archived_file(archive, last_file)
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bfd *archive, *last_file;
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{
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file_ptr filestart;
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if (!last_file)
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filestart = bfd_ardata(archive)->first_file_filepos;
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else
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filestart = atol(arch_hdr(last_file)->ar_nxtmem);
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return rs6000coff_get_elt_at_filepos (archive, filestart);
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}
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static bfd_target *
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rs6000coff_archive_p (abfd)
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bfd *abfd;
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{
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struct fl_hdr hdr;
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register struct artdata *art;
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if (bfd_read (&hdr, sizeof (hdr), 1, abfd) != sizeof (hdr)) {
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bfd_error = wrong_format;
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return 0;
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}
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if (strncmp(hdr.fl_magic, AIAMAG, SAIAMAG)) {
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bfd_error = wrong_format;
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return 0;
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}
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/*
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* bfd_ardata() accesses the bfd->tdata field.
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*/
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abfd->tdata.aout_ar_data =
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(void *) bfd_zalloc(abfd, sizeof (*art) + sizeof (hdr));
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if ((art = bfd_ardata (abfd)) == NULL) {
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bfd_error = no_memory;
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return 0;
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}
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art->first_file_filepos = atoi(hdr.fl_fstmoff);
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*(struct fl_hdr *) (1 + art) = hdr;
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/* Someday...
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* slurp in the member table, which I think is the armap equivalent.
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xcoff_slurp_armap(abfd);
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*/
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return abfd->xvec;
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}
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static int
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rs6000coff_stat_arch_elt(abfd, buf)
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bfd *abfd;
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struct stat *buf;
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{
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struct ar_hdr *hdr;
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char *aloser;
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if (abfd->arelt_data == NULL) {
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bfd_error = invalid_operation;
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return -1;
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}
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hdr = arch_hdr (abfd);
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#define foo(arelt, stelt, size) \
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buf->stelt = strtol (hdr->arelt, &aloser, size); \
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if (aloser == hdr->arelt) return -1;
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foo (ar_date, st_mtime, 10);
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foo (ar_uid, st_uid, 10);
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foo (ar_gid, st_gid, 10);
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foo (ar_mode, st_mode, 8);
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foo (ar_size, st_size, 10);
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#undef foo
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return 0;
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}
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static boolean
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rs6000coff_write_armap (arch, elength, map, orl_count, stridx)
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bfd *arch;
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unsigned int elength;
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struct orl *map;
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{
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bfd_error = invalid_operation;
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return false;
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}
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#endif /* ARCHIVES_PLEASE */
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#ifdef COREFILES_PLEASE
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extern bfd_target * rs6000coff_core_p ();
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extern boolean rs6000coff_get_section_contents ();
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extern boolean rs6000coff_core_file_matches_executable_p ();
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#undef coff_core_file_matches_executable_p
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#define coff_core_file_matches_executable_p \
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rs6000coff_core_file_matches_executable_p
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#undef coff_get_section_contents
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#define coff_get_section_contents rs6000coff_get_section_contents
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#endif
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/* The transfer vector that leads the outside world to all of the above. */
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bfd_target rs6000coff_vec =
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{
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"aixcoff-rs6000", /* name */
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bfd_target_coff_flavour,
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true, /* data byte order is big */
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true, /* header byte order is big */
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(HAS_RELOC | EXEC_P | /* object flags */
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HAS_LINENO | HAS_DEBUG |
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HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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0, /* leading char */
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'/', /* ar_pad_char */
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15, /* ar_max_namelen??? FIXMEmgo */
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3, /* default alignment power */
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_do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
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_do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
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{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
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coff_archive_p,
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#ifdef COREFILES_PLEASE
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rs6000coff_core_p
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#else
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_bfd_dummy_target
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#endif
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},
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{bfd_false, coff_mkobject, coff_mkarchive, /* bfd_set_format */
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bfd_false},
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{bfd_false, coff_write_object_contents, /* bfd_write_contents */
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_bfd_write_archive_contents, bfd_false},
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JUMP_TABLE(coff),
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COFF_SWAP_TABLE
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};
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