112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
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/* BFD back-end for i386 a.out binaries under BSD.
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Copyright (C) 1990, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This data should be correct for the format used under all the various
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BSD ports for 386 machines. */
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#define BYTES_IN_WORD 4
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#define ARCH 32
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/* ZMAGIC files never have the header in the text. */
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#define N_HEADER_IN_TEXT(x) 0
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/* ZMAGIC files start at address 0. This does not apply to QMAGIC. */
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#define TEXT_START_ADDR 0
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#define PAGE_SIZE 4096
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#define SEGMENT_SIZE PAGE_SIZE
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#define DEFAULT_ARCH bfd_arch_i386
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#define MACHTYPE_OK(mtype) ((mtype) == M_386 || (mtype) == M_386_NETBSD || (mtype) == M_UNKNOWN)
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#define MY(OP) CAT(freebsd386_,OP)
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#define TARGETNAME "a.out-freebsd-386"
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#define N_MAGIC(ex) \
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((ex).a_info & 0xffff)
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#define N_MACHTYPE(ex) \
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( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETMID_NET(ex) : \
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((ex).a_info >> 16) & 0x03ff )
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#define N_FLAGS(ex) \
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( (N_GETMAGIC_NET(ex) == ZMAGIC) ? N_GETFLAG_NET(ex) : \
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((ex).a_info >> 26) & 0x3f )
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#define N_SET_INFO(ex,mag,mid,flag) \
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( (ex).a_info = (((flag) & 0x3f) <<26) | (((mid) & 0x03ff) << 16) | \
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((mag) & 0xffff) )
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#define N_GETMAGIC_NET(ex) \
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(ntohl((ex).a_info) & 0xffff)
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#define N_GETMID_NET(ex) \
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((ntohl((ex).a_info) >> 16) & 0x03ff)
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#define N_GETFLAG_NET(ex) \
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((ntohl((ex).a_info) >> 26) & 0x3f)
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#define N_SETMAGIC_NET(ex,mag,mid,flag) \
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( (ex).a_info = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
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(((mag)&0xffff)) ) )
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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 N_ALIGN(ex,x) \
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(N_MAGIC(ex) == ZMAGIC || N_MAGIC(ex) == QMAGIC || \
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N_GETMAGIC_NET(ex) == ZMAGIC || N_GETMAGIC_NET(ex) == QMAGIC ? \
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((x) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1) : (x))
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/* Valid magic number check. */
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#define N_BADMAG(ex) \
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(N_MAGIC(ex) != OMAGIC && N_MAGIC(ex) != NMAGIC && \
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N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC && \
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N_GETMAGIC_NET(ex) != OMAGIC && N_GETMAGIC_NET(ex) != NMAGIC && \
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N_GETMAGIC_NET(ex) != ZMAGIC && N_GETMAGIC_NET(ex) != QMAGIC)
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/* Address of the bottom of the text segment. */
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#define N_TXTADDR(ex) \
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((N_MAGIC(ex) == OMAGIC || N_MAGIC(ex) == NMAGIC || \
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N_MAGIC(ex) == ZMAGIC) ? 0 : PAGE_SIZE)
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/* Address of the bottom of the data segment. */
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#define N_DATADDR(ex) \
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N_ALIGN(ex, N_TXTADDR(ex) + (ex).a_text)
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/* Text segment offset. */
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#define N_TXTOFF(ex) \
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(N_MAGIC(ex) == ZMAGIC ? PAGE_SIZE : (N_MAGIC(ex) == QMAGIC || \
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N_GETMAGIC_NET(ex) == ZMAGIC) ? 0 : EXEC_BYTES_SIZE)
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/* Data segment offset. */
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#define N_DATOFF(ex) \
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N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)
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/* Relocation table offset. */
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#define N_RELOFF(ex) \
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N_ALIGN(ex, N_DATOFF(ex) + (ex).a_data)
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/* Symbol table offset. */
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#define N_SYMOFF(ex) \
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(N_RELOFF(ex) + (ex).a_trsize + (ex).a_drsize)
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/* String table offset. */
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#define N_STROFF(ex) (N_SYMOFF(ex) + (ex).a_syms)
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#define NO_SWAP_MAGIC /* magic number already in correct endian format */
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#include "aout-target.h"
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