146 lines
4.3 KiB
C
146 lines
4.3 KiB
C
/* BFD back-end definitions used by all FreeBSD a.out targets.
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Copyright (C) 1990, 1991, 1992, 1996 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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*/
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/* FreeBSD QMAGIC files have the header in the text. */
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#define N_HEADER_IN_TEXT(x) 1
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#define MY_text_includes_header 1
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#define TEXT_START_ADDR (TARGET_PAGE_SIZE + 0x20)
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/*
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* FreeBSD uses a weird mix of byte orderings for its a_info field.
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* Its assembler emits NetBSD style object files, with a big-endian
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* a_info. Its linker seems to accept either byte ordering, but
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* emits a little-endian a_info.
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*
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* Here, we accept either byte ordering, but always produce
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* little-endian.
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*
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* FIXME - Probably we should always produce the _native_ byte
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* ordering. I.e., it should be in the architecture-specific
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* file, not here. But in reality, there is almost zero chance
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* that FreeBSD will ever use a.out in a new port.
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*/
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#define N_MACHTYPE(exec) \
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((enum machine_type) \
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((freebsd_swap_magic(&(exec).a_info) >> 16) & 0x3ff))
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#define N_FLAGS(exec) \
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((enum machine_type) \
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((freebsd_swap_magic(&(exec).a_info) >> 26) & 0x3f))
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#define N_SET_INFO(exec, magic, type, flags) \
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((exec).a_info = ((magic) & 0xffff) \
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| (((int)(type) & 0x3ff) << 16) \
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| (((flags) & 0x3f) << 26))
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#define N_SET_MACHTYPE(exec, machtype) \
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((exec).a_info = \
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((exec).a_info & 0xfb00ffff) | ((((int)(machtype))&0x3ff) << 16))
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#define N_SET_FLAGS(exec, flags) \
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((exec).a_info = \
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((exec).a_info & 0x03ffffff) | ((flags & 0x03f) << 26))
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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 "libaout.h"
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#define SWAP_MAGIC(ext) (freebsd_swap_magic(ext))
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#define MY_bfd_final_link freebsd_bfd_final_link
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#define MY_write_object_contents freebsd_write_object_contents
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static boolean freebsd_bfd_final_link PARAMS ((bfd *, struct bfd_link_info *));
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static long freebsd_swap_magic PARAMS ((void *ext));
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static boolean freebsd_write_object_contents PARAMS ((bfd *abfd));
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#include "aout-target.h"
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static boolean
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freebsd_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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obj_aout_subformat (abfd) = q_magic_format;
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return NAME(aout,final_link) (abfd, info, MY_final_link_callback);
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}
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/* Swap a magic number. We accept either endian, whichever looks valid. */
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static long
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freebsd_swap_magic(ext)
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void *ext;
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{
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long linfo = bfd_getl32(ext);
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long binfo = bfd_getb32(ext);
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int lmagic = linfo & 0xffff;
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int bmagic = binfo & 0xffff;
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int lmagic_ok = lmagic == OMAGIC || lmagic == NMAGIC ||
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lmagic == ZMAGIC || lmagic == QMAGIC;
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int bmagic_ok = bmagic == OMAGIC || bmagic == NMAGIC ||
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bmagic == ZMAGIC || bmagic == QMAGIC;
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return bmagic_ok && !lmagic_ok ? binfo : linfo;
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}
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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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static boolean
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freebsd_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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#if CHOOSE_RELOC_SIZE
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CHOOSE_RELOC_SIZE(abfd);
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#else
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obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
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#endif
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/* Magic number, maestro, please! */
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switch (bfd_get_arch(abfd)) {
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case bfd_arch_m68k:
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if (strcmp (abfd->xvec->name, "a.out-m68k4k-netbsd") == 0)
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N_SET_MACHTYPE(*execp, M_68K4K_NETBSD);
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else
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N_SET_MACHTYPE(*execp, M_68K_NETBSD);
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break;
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case bfd_arch_sparc:
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N_SET_MACHTYPE(*execp, M_SPARC_NETBSD);
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break;
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case bfd_arch_i386:
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N_SET_MACHTYPE(*execp, M_386_NETBSD);
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break;
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case bfd_arch_ns32k:
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N_SET_MACHTYPE(*execp, M_532_NETBSD);
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break;
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default:
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N_SET_MACHTYPE(*execp, M_UNKNOWN);
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break;
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}
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WRITE_HEADERS(abfd, execp);
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return true;
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}
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