663 lines
20 KiB
C
663 lines
20 KiB
C
/* Define a target vector and some small routines for a variant of a.out.
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Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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2000, 2001, 2002, 2003
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Free Software Foundation, Inc.
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "aout/aout64.h"
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#include "aout/stab_gnu.h"
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#include "aout/ar.h"
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/*#include "libaout.h"*/
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#ifndef SEGMENT_SIZE
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#define SEGMENT_SIZE TARGET_PAGE_SIZE
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#endif
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extern reloc_howto_type * NAME(aout,reloc_type_lookup)
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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/* Set parameters about this a.out file that are machine-dependent.
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This routine is called from some_aout_object_p just before it returns. */
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#ifndef MY_callback
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static const bfd_target *MY(callback) PARAMS ((bfd *));
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static const bfd_target *
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MY(callback) (abfd)
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bfd *abfd;
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{
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struct internal_exec *execp = exec_hdr (abfd);
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unsigned int arch_align_power;
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unsigned long arch_align;
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/* Calculate the file positions of the parts of a newly read aout header */
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obj_textsec (abfd)->_raw_size = N_TXTSIZE(*execp);
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/* The virtual memory addresses of the sections */
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obj_textsec (abfd)->vma = N_TXTADDR(*execp);
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obj_datasec (abfd)->vma = N_DATADDR(*execp);
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obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
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/* For some targets, if the entry point is not in the same page
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as the start of the text, then adjust the VMA so that it is.
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FIXME: Do this with a macro like SET_ARCH_MACH instead? */
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if (aout_backend_info (abfd)->entry_is_text_address
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&& execp->a_entry > obj_textsec (abfd)->vma)
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{
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bfd_vma adjust;
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adjust = execp->a_entry - obj_textsec (abfd)->vma;
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/* Adjust only by whole pages. */
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adjust &= ~(TARGET_PAGE_SIZE - 1);
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obj_textsec (abfd)->vma += adjust;
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obj_datasec (abfd)->vma += adjust;
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obj_bsssec (abfd)->vma += adjust;
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}
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/* Set the load addresses to be the same as the virtual addresses. */
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obj_textsec (abfd)->lma = obj_textsec (abfd)->vma;
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obj_datasec (abfd)->lma = obj_datasec (abfd)->vma;
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obj_bsssec (abfd)->lma = obj_bsssec (abfd)->vma;
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/* The file offsets of the sections */
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obj_textsec (abfd)->filepos = N_TXTOFF (*execp);
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obj_datasec (abfd)->filepos = N_DATOFF (*execp);
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/* The file offsets of the relocation info */
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obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
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obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
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/* The file offsets of the string table and symbol table. */
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obj_sym_filepos (abfd) = N_SYMOFF (*execp);
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obj_str_filepos (abfd) = N_STROFF (*execp);
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/* Determine the architecture and machine type of the object file. */
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#ifdef SET_ARCH_MACH
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SET_ARCH_MACH (abfd, *execp);
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#else
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bfd_default_set_arch_mach (abfd, DEFAULT_ARCH, 0);
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#endif
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/* The number of relocation records. This must be called after
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SET_ARCH_MACH. It assumes that SET_ARCH_MACH will set
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obj_reloc_entry_size correctly, if the reloc size is not
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RELOC_STD_SIZE. */
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obj_textsec (abfd)->reloc_count =
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execp->a_trsize / obj_reloc_entry_size (abfd);
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obj_datasec (abfd)->reloc_count =
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execp->a_drsize / obj_reloc_entry_size (abfd);
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/* Now that we know the architecture, set the alignments of the
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sections. This is normally done by NAME(aout,new_section_hook),
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but when the initial sections were created the architecture had
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not yet been set. However, for backward compatibility, we don't
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set the alignment power any higher than as required by the size
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of the section. */
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arch_align_power = bfd_get_arch_info (abfd)->section_align_power;
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arch_align = 1 << arch_align_power;
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if ((BFD_ALIGN (obj_textsec (abfd)->_raw_size, arch_align)
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== obj_textsec (abfd)->_raw_size)
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&& (BFD_ALIGN (obj_datasec (abfd)->_raw_size, arch_align)
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== obj_datasec (abfd)->_raw_size)
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&& (BFD_ALIGN (obj_bsssec (abfd)->_raw_size, arch_align)
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== obj_bsssec (abfd)->_raw_size))
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{
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obj_textsec (abfd)->alignment_power = arch_align_power;
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obj_datasec (abfd)->alignment_power = arch_align_power;
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obj_bsssec (abfd)->alignment_power = arch_align_power;
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}
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/* Don't set sizes now -- can't be sure until we know arch & mach.
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Sizes get set in set_sizes callback, later. */
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#if 0
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adata(abfd).page_size = TARGET_PAGE_SIZE;
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adata(abfd).segment_size = SEGMENT_SIZE;
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adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
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#endif
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return abfd->xvec;
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}
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#endif
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#ifndef MY_object_p
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/* Finish up the reading of an a.out file header */
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static const bfd_target *MY(object_p) PARAMS ((bfd *));
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static const bfd_target *
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MY(object_p) (abfd)
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bfd *abfd;
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{
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struct external_exec exec_bytes; /* Raw exec header from file */
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struct internal_exec exec; /* Cleaned-up exec header */
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const bfd_target *target;
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bfd_size_type amt = EXEC_BYTES_SIZE;
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if (bfd_bread ((PTR) &exec_bytes, amt, abfd) != amt)
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{
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if (bfd_get_error () != bfd_error_system_call)
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bfd_set_error (bfd_error_wrong_format);
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return 0;
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}
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#ifdef SWAP_MAGIC
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exec.a_info = SWAP_MAGIC (exec_bytes.e_info);
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#else
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exec.a_info = GET_MAGIC (abfd, exec_bytes.e_info);
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#endif /* SWAP_MAGIC */
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if (N_BADMAG (exec)) return 0;
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#ifdef MACHTYPE_OK
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if (!(MACHTYPE_OK (N_MACHTYPE (exec)))) return 0;
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#endif
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NAME(aout,swap_exec_header_in) (abfd, &exec_bytes, &exec);
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#ifdef SWAP_MAGIC
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/* swap_exec_header_in read in a_info with the wrong byte order */
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exec.a_info = SWAP_MAGIC (exec_bytes.e_info);
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#endif /* SWAP_MAGIC */
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target = NAME(aout,some_aout_object_p) (abfd, &exec, MY(callback));
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#ifdef ENTRY_CAN_BE_ZERO
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/* The NEWSOS3 entry-point is/was 0, which (amongst other lossage)
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* means that it isn't obvious if EXEC_P should be set.
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* All of the following must be true for an executable:
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* There must be no relocations, the bfd can be neither an
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* archive nor an archive element, and the file must be executable. */
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if (exec.a_trsize + exec.a_drsize == 0
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&& bfd_get_format(abfd) == bfd_object && abfd->my_archive == NULL)
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{
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struct stat buf;
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#ifndef S_IXUSR
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#define S_IXUSR 0100 /* Execute by owner. */
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#endif
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if (stat(abfd->filename, &buf) == 0 && (buf.st_mode & S_IXUSR))
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abfd->flags |= EXEC_P;
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}
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#endif /* ENTRY_CAN_BE_ZERO */
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return target;
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}
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#define MY_object_p MY(object_p)
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#endif
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#ifndef MY_mkobject
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static bfd_boolean MY(mkobject) PARAMS ((bfd *));
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static bfd_boolean
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MY(mkobject) (abfd)
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bfd *abfd;
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{
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if (! NAME(aout,mkobject) (abfd))
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return FALSE;
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#if 0 /* Sizes get set in set_sizes callback, later, after we know
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the architecture and machine. */
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adata(abfd).page_size = TARGET_PAGE_SIZE;
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adata(abfd).segment_size = SEGMENT_SIZE;
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adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
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#endif
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return TRUE;
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}
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#define MY_mkobject MY(mkobject)
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#endif
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#ifndef MY_bfd_copy_private_section_data
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/* Copy private section data. This actually does nothing with the
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sections. It copies the subformat field. We copy it here, because
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we need to know whether this is a QMAGIC file before we set the
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section contents, and copy_private_bfd_data is not called until
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after the section contents have been set. */
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static bfd_boolean MY_bfd_copy_private_section_data
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PARAMS ((bfd *, asection *, bfd *, asection *));
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static bfd_boolean
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MY_bfd_copy_private_section_data (ibfd, isec, obfd, osec)
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bfd *ibfd;
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asection *isec ATTRIBUTE_UNUSED;
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bfd *obfd;
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asection *osec ATTRIBUTE_UNUSED;
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{
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if (bfd_get_flavour (ibfd) == bfd_target_aout_flavour
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&& bfd_get_flavour (obfd) == bfd_target_aout_flavour)
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obj_aout_subformat (obfd) = obj_aout_subformat (ibfd);
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return TRUE;
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}
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#endif
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/* Write an object file.
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Section contents have already been written. We write the
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file header, symbols, and relocation. */
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#ifndef MY_write_object_contents
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static bfd_boolean MY(write_object_contents) PARAMS ((bfd *));
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static bfd_boolean
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MY(write_object_contents) (abfd)
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bfd *abfd;
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{
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struct external_exec exec_bytes;
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struct internal_exec *execp = exec_hdr (abfd);
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obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
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WRITE_HEADERS(abfd, execp);
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return TRUE;
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}
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#define MY_write_object_contents MY(write_object_contents)
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#endif
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#ifndef MY_set_sizes
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static bfd_boolean MY(set_sizes) PARAMS ((bfd *));
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static bfd_boolean
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MY(set_sizes) (abfd)
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bfd *abfd;
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{
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adata(abfd).page_size = TARGET_PAGE_SIZE;
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adata(abfd).segment_size = SEGMENT_SIZE;
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#ifdef ZMAGIC_DISK_BLOCK_SIZE
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adata(abfd).zmagic_disk_block_size = ZMAGIC_DISK_BLOCK_SIZE;
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#else
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adata(abfd).zmagic_disk_block_size = TARGET_PAGE_SIZE;
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#endif
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adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
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return TRUE;
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}
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#define MY_set_sizes MY(set_sizes)
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#endif
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#ifndef MY_exec_hdr_flags
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#define MY_exec_hdr_flags 0
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#endif
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#ifndef MY_backend_data
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#ifndef MY_zmagic_contiguous
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#define MY_zmagic_contiguous 0
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#endif
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#ifndef MY_text_includes_header
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#define MY_text_includes_header 0
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#endif
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#ifndef MY_entry_is_text_address
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#define MY_entry_is_text_address 0
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#endif
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#ifndef MY_exec_header_not_counted
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#define MY_exec_header_not_counted 0
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#endif
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#ifndef MY_add_dynamic_symbols
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#define MY_add_dynamic_symbols 0
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#endif
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#ifndef MY_add_one_symbol
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#define MY_add_one_symbol 0
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#endif
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#ifndef MY_link_dynamic_object
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#define MY_link_dynamic_object 0
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#endif
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#ifndef MY_write_dynamic_symbol
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#define MY_write_dynamic_symbol 0
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#endif
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#ifndef MY_check_dynamic_reloc
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#define MY_check_dynamic_reloc 0
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#endif
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#ifndef MY_finish_dynamic_link
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#define MY_finish_dynamic_link 0
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#endif
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static const struct aout_backend_data MY(backend_data) = {
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MY_zmagic_contiguous,
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MY_text_includes_header,
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MY_entry_is_text_address,
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MY_exec_hdr_flags,
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0, /* text vma? */
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MY_set_sizes,
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MY_exec_header_not_counted,
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MY_add_dynamic_symbols,
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MY_add_one_symbol,
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MY_link_dynamic_object,
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MY_write_dynamic_symbol,
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MY_check_dynamic_reloc,
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MY_finish_dynamic_link
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};
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#define MY_backend_data &MY(backend_data)
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#endif
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#ifndef MY_final_link_callback
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/* Callback for the final_link routine to set the section offsets. */
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static void MY_final_link_callback
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PARAMS ((bfd *, file_ptr *, file_ptr *, file_ptr *));
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static void
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MY_final_link_callback (abfd, ptreloff, pdreloff, psymoff)
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bfd *abfd;
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file_ptr *ptreloff;
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file_ptr *pdreloff;
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file_ptr *psymoff;
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{
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struct internal_exec *execp = exec_hdr (abfd);
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*ptreloff = N_TRELOFF (*execp);
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*pdreloff = N_DRELOFF (*execp);
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*psymoff = N_SYMOFF (*execp);
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}
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#endif
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#ifndef MY_bfd_final_link
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/* Final link routine. We need to use a call back to get the correct
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offsets in the output file. */
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static bfd_boolean MY_bfd_final_link PARAMS ((bfd *, struct bfd_link_info *));
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static bfd_boolean
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MY_bfd_final_link (abfd, info)
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bfd *abfd;
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struct bfd_link_info *info;
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{
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return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
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}
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#endif
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/* We assume BFD generic archive files. */
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#ifndef MY_openr_next_archived_file
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#define MY_openr_next_archived_file bfd_generic_openr_next_archived_file
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#endif
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#ifndef MY_get_elt_at_index
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#define MY_get_elt_at_index _bfd_generic_get_elt_at_index
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#endif
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#ifndef MY_generic_stat_arch_elt
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#define MY_generic_stat_arch_elt bfd_generic_stat_arch_elt
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#endif
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#ifndef MY_slurp_armap
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#define MY_slurp_armap bfd_slurp_bsd_armap
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#endif
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#ifndef MY_slurp_extended_name_table
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#define MY_slurp_extended_name_table _bfd_slurp_extended_name_table
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#endif
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#ifndef MY_construct_extended_name_table
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#define MY_construct_extended_name_table \
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_bfd_archive_bsd_construct_extended_name_table
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#endif
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#ifndef MY_write_armap
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#define MY_write_armap bsd_write_armap
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#endif
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#ifndef MY_read_ar_hdr
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#define MY_read_ar_hdr _bfd_generic_read_ar_hdr
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#endif
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#ifndef MY_truncate_arname
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#define MY_truncate_arname bfd_bsd_truncate_arname
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#endif
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#ifndef MY_update_armap_timestamp
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#define MY_update_armap_timestamp _bfd_archive_bsd_update_armap_timestamp
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#endif
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/* No core file defined here -- configure in trad-core.c separately. */
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#ifndef MY_core_file_failing_command
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#define MY_core_file_failing_command _bfd_nocore_core_file_failing_command
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#endif
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#ifndef MY_core_file_failing_signal
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#define MY_core_file_failing_signal _bfd_nocore_core_file_failing_signal
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#endif
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#ifndef MY_core_file_matches_executable_p
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#define MY_core_file_matches_executable_p \
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_bfd_nocore_core_file_matches_executable_p
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#endif
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#ifndef MY_core_file_p
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#define MY_core_file_p _bfd_dummy_target
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#endif
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#ifndef MY_bfd_debug_info_start
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#define MY_bfd_debug_info_start bfd_void
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#endif
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#ifndef MY_bfd_debug_info_end
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#define MY_bfd_debug_info_end bfd_void
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#endif
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#ifndef MY_bfd_debug_info_accumulate
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#define MY_bfd_debug_info_accumulate \
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(void (*) PARAMS ((bfd*, struct bfd_section *))) bfd_void
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#endif
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#ifndef MY_core_file_failing_command
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#define MY_core_file_failing_command NAME(aout,core_file_failing_command)
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#endif
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#ifndef MY_core_file_failing_signal
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#define MY_core_file_failing_signal NAME(aout,core_file_failing_signal)
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#endif
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#ifndef MY_core_file_matches_executable_p
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#define MY_core_file_matches_executable_p NAME(aout,core_file_matches_executable_p)
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#endif
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#ifndef MY_set_section_contents
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#define MY_set_section_contents NAME(aout,set_section_contents)
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#endif
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#ifndef MY_get_section_contents
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#define MY_get_section_contents NAME(aout,get_section_contents)
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#endif
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#ifndef MY_get_section_contents_in_window
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#define MY_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
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#endif
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#ifndef MY_new_section_hook
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#define MY_new_section_hook NAME(aout,new_section_hook)
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#endif
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#ifndef MY_get_symtab_upper_bound
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#define MY_get_symtab_upper_bound NAME(aout,get_symtab_upper_bound)
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#endif
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#ifndef MY_canonicalize_symtab
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#define MY_canonicalize_symtab NAME(aout,canonicalize_symtab)
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#endif
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#ifndef MY_get_reloc_upper_bound
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#define MY_get_reloc_upper_bound NAME(aout,get_reloc_upper_bound)
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#endif
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#ifndef MY_canonicalize_reloc
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#define MY_canonicalize_reloc NAME(aout,canonicalize_reloc)
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#endif
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#ifndef MY_make_empty_symbol
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#define MY_make_empty_symbol NAME(aout,make_empty_symbol)
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#endif
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#ifndef MY_print_symbol
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#define MY_print_symbol NAME(aout,print_symbol)
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#endif
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#ifndef MY_get_symbol_info
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#define MY_get_symbol_info NAME(aout,get_symbol_info)
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#endif
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#ifndef MY_get_lineno
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#define MY_get_lineno NAME(aout,get_lineno)
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#endif
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#ifndef MY_set_arch_mach
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#define MY_set_arch_mach NAME(aout,set_arch_mach)
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#endif
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#ifndef MY_find_nearest_line
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#define MY_find_nearest_line NAME(aout,find_nearest_line)
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#endif
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#ifndef MY_sizeof_headers
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#define MY_sizeof_headers NAME(aout,sizeof_headers)
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#endif
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#ifndef MY_bfd_get_relocated_section_contents
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#define MY_bfd_get_relocated_section_contents \
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bfd_generic_get_relocated_section_contents
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#endif
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#ifndef MY_bfd_relax_section
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#define MY_bfd_relax_section bfd_generic_relax_section
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#endif
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#ifndef MY_bfd_gc_sections
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#define MY_bfd_gc_sections bfd_generic_gc_sections
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#endif
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#ifndef MY_bfd_merge_sections
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#define MY_bfd_merge_sections bfd_generic_merge_sections
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#endif
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#ifndef MY_bfd_discard_group
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#define MY_bfd_discard_group bfd_generic_discard_group
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#endif
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#ifndef MY_bfd_reloc_type_lookup
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#define MY_bfd_reloc_type_lookup NAME(aout,reloc_type_lookup)
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#endif
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#ifndef MY_bfd_make_debug_symbol
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#define MY_bfd_make_debug_symbol 0
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#endif
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#ifndef MY_read_minisymbols
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#define MY_read_minisymbols NAME(aout,read_minisymbols)
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#endif
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#ifndef MY_minisymbol_to_symbol
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#define MY_minisymbol_to_symbol NAME(aout,minisymbol_to_symbol)
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#endif
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#ifndef MY_bfd_link_hash_table_create
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#define MY_bfd_link_hash_table_create NAME(aout,link_hash_table_create)
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#endif
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#ifndef MY_bfd_link_hash_table_free
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#define MY_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
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#endif
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#ifndef MY_bfd_link_add_symbols
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#define MY_bfd_link_add_symbols NAME(aout,link_add_symbols)
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#endif
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#ifndef MY_bfd_link_just_syms
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#define MY_bfd_link_just_syms _bfd_generic_link_just_syms
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#endif
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#ifndef MY_bfd_link_split_section
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#define MY_bfd_link_split_section _bfd_generic_link_split_section
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#endif
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#ifndef MY_bfd_copy_private_bfd_data
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#define MY_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
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#endif
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#ifndef MY_bfd_merge_private_bfd_data
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#define MY_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
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#endif
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#ifndef MY_bfd_copy_private_symbol_data
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#define MY_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
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#endif
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#ifndef MY_bfd_print_private_bfd_data
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#define MY_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
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#endif
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#ifndef MY_bfd_set_private_flags
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#define MY_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
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#endif
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#ifndef MY_bfd_is_local_label_name
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#define MY_bfd_is_local_label_name bfd_generic_is_local_label_name
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#endif
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#ifndef MY_bfd_free_cached_info
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#define MY_bfd_free_cached_info NAME(aout,bfd_free_cached_info)
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#endif
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#ifndef MY_close_and_cleanup
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#define MY_close_and_cleanup MY_bfd_free_cached_info
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#endif
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#ifndef MY_get_dynamic_symtab_upper_bound
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#define MY_get_dynamic_symtab_upper_bound \
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_bfd_nodynamic_get_dynamic_symtab_upper_bound
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#endif
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#ifndef MY_canonicalize_dynamic_symtab
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#define MY_canonicalize_dynamic_symtab \
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_bfd_nodynamic_canonicalize_dynamic_symtab
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#endif
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#ifndef MY_get_dynamic_reloc_upper_bound
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#define MY_get_dynamic_reloc_upper_bound \
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_bfd_nodynamic_get_dynamic_reloc_upper_bound
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#endif
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#ifndef MY_canonicalize_dynamic_reloc
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#define MY_canonicalize_dynamic_reloc \
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_bfd_nodynamic_canonicalize_dynamic_reloc
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#endif
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/* Aout symbols normally have leading underscores */
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#ifndef MY_symbol_leading_char
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#define MY_symbol_leading_char '_'
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#endif
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/* Aout archives normally use spaces for padding */
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#ifndef AR_PAD_CHAR
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#define AR_PAD_CHAR ' '
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#endif
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#ifndef MY_BFD_TARGET
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const bfd_target MY(vec) =
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{
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TARGETNAME, /* name */
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bfd_target_aout_flavour,
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#ifdef TARGET_IS_BIG_ENDIAN_P
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BFD_ENDIAN_BIG, /* target byte order (big) */
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BFD_ENDIAN_BIG, /* target headers byte order (big) */
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#else
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BFD_ENDIAN_LITTLE, /* target byte order (little) */
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BFD_ENDIAN_LITTLE, /* target headers byte order (little) */
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#endif
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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 | D_PAGED),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
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MY_symbol_leading_char,
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AR_PAD_CHAR, /* ar_pad_char */
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15, /* ar_max_namelen */
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#ifdef TARGET_IS_BIG_ENDIAN_P
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bfd_getb64, bfd_getb_signed_64, bfd_putb64,
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bfd_getb32, bfd_getb_signed_32, bfd_putb32,
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bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
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bfd_getb64, bfd_getb_signed_64, bfd_putb64,
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bfd_getb32, bfd_getb_signed_32, bfd_putb32,
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bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
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#else
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
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#endif
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{_bfd_dummy_target, MY_object_p, /* bfd_check_format */
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bfd_generic_archive_p, MY_core_file_p},
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{bfd_false, MY_mkobject, /* bfd_set_format */
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_bfd_generic_mkarchive, bfd_false},
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{bfd_false, MY_write_object_contents, /* bfd_write_contents */
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_bfd_write_archive_contents, bfd_false},
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BFD_JUMP_TABLE_GENERIC (MY),
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BFD_JUMP_TABLE_COPY (MY),
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BFD_JUMP_TABLE_CORE (MY),
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BFD_JUMP_TABLE_ARCHIVE (MY),
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BFD_JUMP_TABLE_SYMBOLS (MY),
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BFD_JUMP_TABLE_RELOCS (MY),
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BFD_JUMP_TABLE_WRITE (MY),
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BFD_JUMP_TABLE_LINK (MY),
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BFD_JUMP_TABLE_DYNAMIC (MY),
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/* Alternative_target */
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NULL,
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(PTR) MY_backend_data
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};
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#endif /* MY_BFD_TARGET */
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