bfd/netbsd.h

/* BFD back-end definitions used by all NetBSD targets.
   Copyright (C) 1990-2025 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */


/* Check for our machine type (part of magic number).  */
#ifndef MACHTYPE_OK
#define MACHTYPE_OK(m) ((m) == DEFAULT_MID || (m) == M_UNKNOWN)
#endif

/* This is the normal load address for executables.  */
#define TEXT_START_ADDR		TARGET_PAGE_SIZE

/* NetBSD ZMAGIC has its header in the text segment.  */
#define N_HEADER_IN_TEXT(x)	1

/* Determine if this is a shared library using the flags.  */
#define N_SHARED_LIB(x)		(N_DYNAMIC (x))

/* We have 6 bits of flags and 10 bits of machine ID.  */
#define N_MACHTYPE(execp) \
	((enum machine_type) (((execp)->a_info >> 16) & 0x03ff))
#define N_FLAGS(execp) \
	(((execp)->a_info >> 26) & 0x3f)

#define N_SET_INFO(execp, magic, type, flags) \
	((execp)->a_info = ((magic) & 0xffff) \
	 | (((int) (type) & 0x3ff) << 16) \
	 | (((flags) & 0x3f) << 24))
#define N_SET_MACHTYPE(execp, machtype) \
	((execp)->a_info = \
	 ((execp)->a_info & 0xfb00ffff) | ((((int) (machtype)) & 0x3ff) << 16))
#define N_SET_FLAGS(execp, flags) \
	((execp)->a_info = \
	 ((execp)->a_info & 0x03ffffff) | ((flags & 0x3fu) << 26))

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

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

/* On NetBSD, the entry point may be taken to be the start of the text
   section.  */
#define MY_entry_is_text_address 1

#define MY_write_object_contents MY (write_object_contents)
static bool MY (write_object_contents) (bfd *);

#define MY_text_includes_header 1

#include "aout-target.h"

/* Write an object file.
   Section contents have already been written.  We write the
   file header, symbols, and relocation.  */

static bool
MY (write_object_contents) (bfd *abfd)
{
  struct external_exec exec_bytes;
  struct internal_exec *execp = exec_hdr (abfd);

  /* We must make certain that the magic number has been set.  This
     will normally have been done by set_section_contents, but only if
     there actually are some section contents.  */
  if (! abfd->output_has_begun)
    NAME (aout, adjust_sizes_and_vmas) (abfd);

  obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;

  /* Magic number, maestro, please!  */
  switch (bfd_get_arch(abfd))
    {
    case DEFAULT_ARCH:
      N_SET_MACHTYPE (execp, DEFAULT_MID);
      break;
    default:
      N_SET_MACHTYPE (execp, M_UNKNOWN);
      break;
    }

  /* The NetBSD magic number is always big-endian.  */
#ifndef TARGET_IS_BIG_ENDIAN_P
  /* XXX aren't there any macro to change byteorder of a word independent of
     the host's or target's endiannesses?  */
  execp->a_info
    = (execp->a_info & 0xffu) << 24 | (execp->a_info & 0xff00) << 8
      | (execp->a_info & 0xff0000) >> 8 | (execp->a_info & 0xff000000) >> 24;
#endif

  WRITE_HEADERS (abfd, execp);

  return true;
}