old-cross-binutils/bfd/netbsd386.c

/* BFD back-end for NetBSD/386 a.out-ish binaries.
   Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc.

This file is part of BFD, the Binary File Descriptor library.

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.  */

#define	BYTES_IN_WORD	4
#define	ARCH	32

/* ZMAGIC files never have the header in the text.  */
#define	N_HEADER_IN_TEXT(x)	0

/* ZMAGIC files start at address 0.  This does not apply to QMAGIC.  */
#define TEXT_START_ADDR 0
#define N_SHARED_LIB(x) 0

#define	PAGE_SIZE	4096
#define	SEGMENT_SIZE	PAGE_SIZE

#define	DEFAULT_ARCH	bfd_arch_i386
#define MACHTYPE_OK(mtype) ((mtype) == M_386 || (mtype) == M_386_NETBSD || (mtype) == M_UNKNOWN)

#define MY(OP) CAT(netbsd386_,OP)
/* This needs to start with a.out so GDB knows it is an a.out variant.  */
#define TARGETNAME "a.out-netbsd-386"

#define N_MAGIC(ex) \
    ( (((ex).a_info)&0xffff0000) ? ((((ex).a_info))&0xffff) : ((ex).a_info))
#define N_MACHTYPE(ex) \
    ( (((ex).a_info)&0xffff0000) ? (((((ex).a_info))>>16)&0x03ff) : 0 )
# define N_FLAGS(ex) \
    ( (((ex).a_info)&0xffff0000) ? ((((ex).a_info)>>26)&0x3f) : 0 )
#define N_SET_INFO(ex, mag,mid,flag) \
    ( (ex).a_info = htonl( (((flag)&0x3f)<<26) | (((mid)&0x03ff)<<16) | \
    (((mag)&0xffff)) ) )
#define N_SET_MAGIC(exec,magic) \
  ((exec).a_info = (((exec).a_info & ~0xffff) | ((magic) & 0xffff)))
#define N_SET_MACHTYPE(exec,machtype) \
  ((exec).a_info = \
   (((exec).a_info & ~(0x3ff<<16)) | (((machtype)&0xff) << 16)))
#define N_SET_FLAGS(exec, flags) \
  ((exec).a_info = \
      (((exec).a_info & ~(0x3f<<26)) | (((flags)&0x3f) << 26)))

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "libaout.h"

#define N_GETMAGIC2(ex) \
    ( (((ex).a_info)&0xffff0000) ? ((((ex).a_info))&0xffff) : \
    (((ex).a_info) | 0x10000) )

#define N_TXTADDR(ex)	(N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : 4096)
#define N_TXTOFF(ex) \
	( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \
	0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? 4096 : EXEC_BYTES_SIZE ))
#define N_ALIGN(ex,x) \
	(N_MAGIC(ex) == ZMAGIC || N_MAGIC(ex) == QMAGIC ? \
	 ((x) + 4096 - 1) & ~(4096 - 1) : (x))
#define N_DATADDR(ex) \
	N_ALIGN(ex, N_TXTADDR(ex) + (ex).a_text)
/* Data segment offset. */
#define	N_DATOFF(ex) \
	N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text)

/* #define N_BADMAG(x)	n_badmag(N_MAGIC(x)) */

/* On NetBSD, the magic number is always in ntohl's "network" (big-endian)
   format.  */
#define SWAP_MAGIC(ext) bfd_getb32 (ext)

#include "aout-target.h"

#if 0
int
n_badmag(x)
unsigned long x; {
  union {
    unsigned long l;
    unsigned char c[sizeof(unsigned long)];
  } l;
  unsigned char temp;

  printf ("x = %o, OMAGIC = %o, NMAGIC = %o, ZMAGIC = %o, QMAGIC = %o\n",
	  x, OMAGIC, NMAGIC, ZMAGIC, QMAGIC);

  l.l = x;
  temp = l.c[0];
  l.c[0] = l.c[3];
  l.c[3] = temp;
  temp = l.c[2];
  l.c[2] = l.c[1];
  l.c[1] = temp;
  printf ("\tbyte-swapped(x) = %o\n", l.l);
  
  return (x != OMAGIC
	  && x != NMAGIC
	  && x != ZMAGIC
	  && x != QMAGIC);
}
#endif