binutils-gdb/bfd/netbsd532.c

/* BFD back-end for NetBSD/532 a.out-ish binaries.
   Copyright (C) 1990, 1991, 1992, 1994 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.  */
/*
 * Created by Ian Dall
 *            5-Jun-94
 *
 * Largely a copy of netbsd386.c plus some code from aout-pc532-mach.c
 */

#define	BYTES_IN_WORD	4

/* ZMAGIC files never include the header in the text.  */
#define	N_HEADER_IN_TEXT(x)	1
  
#define	PAGE_SIZE	0x1000
  
  /* ZMAGIC files start at address 0.  This does not apply to QMAGIC.  */
#define TEXT_START_ADDR PAGE_SIZE
#define N_SHARED_LIB(x) 0
  
  /* Use a_entry of 0 to distinguish object files from OMAGIC executables */
#define N_TXTADDR(x) \
  ((N_MAGIC(x) == OMAGIC) && \
   ((x).a_entry < TEXT_START_ADDR) ? 0 :	/* object file or NMAGIC */\
   N_SHARED_LIB(x) ? 0 :	\
   N_HEADER_IN_TEXT(x)  ?	\
   TEXT_START_ADDR + EXEC_BYTES_SIZE :	/* no padding */\
   TEXT_START_ADDR			/* a page of padding */\
   )

#define	SEGMENT_SIZE	PAGE_SIZE

#define	DEFAULT_ARCH	bfd_arch_ns32k

#define MY(OP) CAT(netbsd532_,OP)
/* This needs to start with a.out so GDB knows it is an a.out variant.  */
#define TARGETNAME "a.out-netbsd-532"
#define MACHTYPE_OK(mtype) ((mtype) == M_532_NETBSD)

#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)))

#define N_MAG(MAG) ((MAG) == o_magic? OMAGIC: ((MAG) == z_magic? ZMAGIC: ((MAG) == n_magic? NMAGIC: 0)))

#define WRITE_HEADERS(abfd, execp) \
{ \
  bfd_size_type text_size; /* dummy vars */ \
  int mag; \
  file_ptr text_end; \
  if (adata(abfd).magic == undecided_magic) \
    NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end); \
  mag = adata(abfd).magic; \
  N_SET_INFO(*execp, N_MAG(mag), M_532_NETBSD, aout_backend_info (abfd)->exec_hdr_flags); \
   \
  execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; \
  execp->a_entry = bfd_get_start_address (abfd); \
   \
  execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \
		     obj_reloc_entry_size (abfd)); \
  execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * \
		     obj_reloc_entry_size (abfd)); \
  NAME(aout,swap_exec_header_out) (abfd, execp, &exec_bytes); \
   \
  if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) return false; \
  if (bfd_write ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd) \
      != EXEC_BYTES_SIZE) \
    return false; \
  /* Now write out reloc info, followed by syms and strings */ \
   \
  if (bfd_get_outsymbols (abfd) != (asymbol **) NULL \
      && bfd_get_symcount (abfd) != 0) \
    { \
      if (bfd_seek (abfd, (file_ptr)(N_SYMOFF(*execp)), SEEK_SET) \
	  != 0) \
	return false; \
       \
      if (! NAME(aout,write_syms)(abfd)) return false; \
       \
      if (bfd_seek (abfd, (file_ptr)(N_TRELOFF(*execp)), SEEK_SET) \
	  != 0) \
	return false; \
       \
      if (!NAME(aout,squirt_out_relocs) (abfd, obj_textsec (abfd))) \
	return false; \
      if (bfd_seek (abfd, (file_ptr)(N_DRELOFF(*execp)), SEEK_SET) \
	  != 0) \
	return false; \
       \
      if (!NAME(aout,squirt_out_relocs)(abfd, obj_datasec (abfd))) \
	return false; \
    } \
}

#include "bfd.h"
#include "sysdep.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)

#include "aout/aout64.h"

/* Forward declaration. Defined in aout-target.h */

static boolean MY(set_sizes)();
     
static CONST struct aout_backend_data MY(backend_data) = {
  0,				/* zmagic contiguous */
  1,				/* text incl header */
  0,
  0,				/* text vma? */
  MY(set_sizes),
  0,				/* exec header is counted */
};
     
#define MY_backend_data &MY(backend_data)
     
/* We can`t use the MYNS macro here for cpp reasons too subtle
 * for me -- IWD
 */
#define MY_bfd_reloc_type_lookup ns32kaout_bfd_reloc_type_lookup
     
/* libaout doesn't use NAME for these ... */
#define MY_get_section_contents aout_32_get_section_contents
     
#define MYNSX(OP) CAT(ns32kaout_,OP)
CONST struct reloc_howto_struct *
MYNSX(bfd_reloc_type_lookup)
  PARAMS((bfd *abfd AND
	  bfd_reloc_code_real_type code));

boolean
MYNSX(write_object_contents)
  PARAMS((bfd *abfd));

static boolean
MY(write_object_contents) (abfd)
     bfd *abfd;
{
  struct external_exec exec_bytes;
  struct internal_exec *execp = exec_hdr (abfd);
  
#if CHOOSE_RELOC_SIZE
  CHOOSE_RELOC_SIZE(abfd);
#else
  obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
#endif
  
  BFD_ASSERT(bfd_get_arch(abfd) == bfd_arch_ns32k);
  BFD_ASSERT(bfd_get_mach(abfd) == 32532);
  N_SET_MACHTYPE (*execp, M_532_NETBSD);
  
  N_SET_FLAGS (*execp, aout_backend_info (abfd)->exec_hdr_flags);
  
  WRITE_HEADERS(abfd, execp);
  
  return true;
}

#define MY_write_object_contents MY(write_object_contents)

#include "aout-target.h"