bfd/coff-m68k.c - binutils-gdb - Git at Google

 /* BFD back-end for Motorola 68000 COFF binaries.
    Copyright (C) 1990-2017 Free Software Foundation, Inc.
    Written by Cygnus Support.

    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.  */

 #include "sysdep.h"
 #include "bfd.h"
 #include "libbfd.h"
 #include "coff/m68k.h"
 #include "coff/internal.h"
 #include "libcoff.h"

 /* This source file is compiled multiple times for various m68k COFF
    variants.  The following macros control its behaviour:

    TARGET_SYM
      The C name of the BFD target vector.  The default is m68k_coff_vec.
    TARGET_NAME
      The user visible target name.  The default is "coff-m68k".
    NAMES_HAVE_UNDERSCORE
      Whether symbol names have an underscore.
    ONLY_DECLARE_RELOCS
      Only declare the relocation howto array.  Don't actually compile
      it.  The actual array will be picked up in another version of the
      file.
    STATIC_RELOCS
      Make the relocation howto array, and associated functions, static.
    COFF_COMMON_ADDEND
      If this is defined, then, for a relocation against a common
      symbol, the object file holds the value (the size) of the common
      symbol.  If this is not defined, then, for a relocation against a
      common symbol, the object file holds zero.  */

 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)

 #ifndef COFF_PAGE_SIZE
 /* The page size is a guess based on ELF.  */
 #define COFF_PAGE_SIZE 0x2000
 #endif

 #ifndef COFF_COMMON_ADDEND
 #define RELOC_SPECIAL_FN 0
 #else
 static bfd_reloc_status_type m68kcoff_common_addend_special_fn
   (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);

 #define RELOC_SPECIAL_FN m68kcoff_common_addend_special_fn
 #endif

 static bfd_boolean m68k_coff_is_local_label_name (bfd *, const char *);

 /* On the delta, a symbol starting with L% is local.  We won't see
    such a symbol on other platforms, so it should be safe to always
    consider it local here.  */

 static bfd_boolean
 m68k_coff_is_local_label_name (bfd *abfd, const char *name)
 {
   if (name[0] == 'L' && name[1] == '%')
     return TRUE;

   return _bfd_coff_is_local_label_name (abfd, name);
 }

 #ifndef STATIC_RELOCS
 /* Clean up namespace.  */
 #define m68kcoff_howto_table	_bfd_m68kcoff_howto_table
 #define m68k_rtype2howto	_bfd_m68kcoff_rtype2howto
 #define m68k_howto2rtype	_bfd_m68kcoff_howto2rtype
 #define m68k_reloc_type_lookup	_bfd_m68kcoff_reloc_type_lookup
 #define m68k_reloc_name_lookup _bfd_m68kcoff_reloc_name_lookup
 #endif

 #ifdef ONLY_DECLARE_RELOCS
 extern reloc_howto_type m68kcoff_howto_table[];
 #else
 #ifdef STATIC_RELOCS
 static
 #endif
 reloc_howto_type m68kcoff_howto_table[] =
   {
     HOWTO (R_RELBYTE,	       0,  0,  	8,  FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "8",	TRUE, 0x000000ff,0x000000ff, FALSE),
     HOWTO (R_RELWORD,	       0,  1, 	16, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "16",	TRUE, 0x0000ffff,0x0000ffff, FALSE),
     HOWTO (R_RELLONG,	       0,  2, 	32, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "32",	TRUE, 0xffffffff,0xffffffff, FALSE),
     HOWTO (R_PCRBYTE,	       0,  0, 	8,  TRUE,  0, complain_overflow_signed,   RELOC_SPECIAL_FN, "DISP8",    TRUE, 0x000000ff,0x000000ff, FALSE),
     HOWTO (R_PCRWORD,	       0,  1, 	16, TRUE,  0, complain_overflow_signed,   RELOC_SPECIAL_FN, "DISP16",   TRUE, 0x0000ffff,0x0000ffff, FALSE),
     HOWTO (R_PCRLONG,	       0,  2, 	32, TRUE,  0, complain_overflow_signed,   RELOC_SPECIAL_FN, "DISP32",   TRUE, 0xffffffff,0xffffffff, FALSE),
     HOWTO (R_RELLONG_NEG,      0, -2, 	32, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "-32",	TRUE, 0xffffffff,0xffffffff, FALSE),
   };
 #endif /* not ONLY_DECLARE_RELOCS */

 #ifndef BADMAG
 #define BADMAG(x) M68KBADMAG(x)
 #endif
 #define M68 1		/* Customize coffcode.h */

 /* Turn a howto into a reloc number */

 #ifdef ONLY_DECLARE_RELOCS
 extern void m68k_rtype2howto (arelent *internal, int relocentry);
 extern int m68k_howto2rtype (reloc_howto_type *);
 extern reloc_howto_type * m68k_reloc_type_lookup
   (bfd *, bfd_reloc_code_real_type);
 extern reloc_howto_type * m68k_reloc_name_lookup (bfd *, const char *);
 #else

 #ifdef STATIC_RELOCS
 #define STAT_REL static
 #else
 #define STAT_REL
 #endif

 STAT_REL void m68k_rtype2howto (arelent *, int);
 STAT_REL int  m68k_howto2rtype (reloc_howto_type *);
 STAT_REL reloc_howto_type * m68k_reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
 STAT_REL reloc_howto_type * m68k_reloc_name_lookup (bfd *, const char *);

 STAT_REL void
 m68k_rtype2howto (arelent *internal, int relocentry)
 {
   switch (relocentry)
     {
     case R_RELBYTE:	internal->howto = m68kcoff_howto_table + 0; break;
     case R_RELWORD:	internal->howto = m68kcoff_howto_table + 1; break;
     case R_RELLONG:	internal->howto = m68kcoff_howto_table + 2; break;
     case R_PCRBYTE:	internal->howto = m68kcoff_howto_table + 3; break;
     case R_PCRWORD:	internal->howto = m68kcoff_howto_table + 4; break;
     case R_PCRLONG:	internal->howto = m68kcoff_howto_table + 5; break;
     case R_RELLONG_NEG:	internal->howto = m68kcoff_howto_table + 6; break;
     default:            internal->howto = NULL; break;
     }
 }

 STAT_REL int
 m68k_howto2rtype (reloc_howto_type * internal)
 {
   if (internal->pc_relative)
     {
       switch (internal->bitsize)
 	{
 	case 32: return R_PCRLONG;
 	case 16: return R_PCRWORD;
 	case 8: return R_PCRBYTE;
 	}
     }
   else
     {
       switch (internal->bitsize)
 	{
 	case 32: return R_RELLONG;
 	case 16: return R_RELWORD;
 	case 8: return R_RELBYTE;
 	}
     }
   return R_RELLONG;
 }

 STAT_REL reloc_howto_type *
 m68k_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 			bfd_reloc_code_real_type code)
 {
   switch (code)
     {
     default:			return NULL;
     case BFD_RELOC_8:		return m68kcoff_howto_table + 0;
     case BFD_RELOC_16:		return m68kcoff_howto_table + 1;
     case BFD_RELOC_CTOR:
     case BFD_RELOC_32:		return m68kcoff_howto_table + 2;
     case BFD_RELOC_8_PCREL:	return m68kcoff_howto_table + 3;
     case BFD_RELOC_16_PCREL:	return m68kcoff_howto_table + 4;
     case BFD_RELOC_32_PCREL:	return m68kcoff_howto_table + 5;
       /* FIXME: There doesn't seem to be a code for R_RELLONG_NEG.  */
     }
   /*NOTREACHED*/
 }

 STAT_REL reloc_howto_type *
 m68k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
 		        const char *r_name)
 {
   unsigned int i;

   for (i = 0;
        i < sizeof (m68kcoff_howto_table) / sizeof (m68kcoff_howto_table[0]);
        i++)
     if (m68kcoff_howto_table[i].name != NULL
 	&& strcasecmp (m68kcoff_howto_table[i].name, r_name) == 0)
       return &m68kcoff_howto_table[i];

   return NULL;
 }

 #endif /* not ONLY_DECLARE_RELOCS */

 #define RTYPE2HOWTO(internal, relocentry) \
   m68k_rtype2howto(internal, (relocentry)->r_type)

 #define SELECT_RELOC(external, internal) \
   external.r_type = m68k_howto2rtype (internal)

 #define coff_bfd_reloc_type_lookup m68k_reloc_type_lookup
 #define coff_bfd_reloc_name_lookup m68k_reloc_name_lookup

 #ifndef COFF_COMMON_ADDEND
 #ifndef coff_rtype_to_howto

 #define coff_rtype_to_howto m68kcoff_rtype_to_howto

 static reloc_howto_type *
 m68kcoff_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
 			 asection *sec,
 			 struct internal_reloc *rel,
 			 struct coff_link_hash_entry *h ATTRIBUTE_UNUSED,
 			 struct internal_syment *sym ATTRIBUTE_UNUSED,
 			 bfd_vma *addendp)
 {
   arelent relent;
   reloc_howto_type *howto;

   relent.howto = NULL;
   RTYPE2HOWTO (&relent, rel);

   howto = relent.howto;

   if (howto != NULL && howto->pc_relative)
     *addendp += sec->vma;

   return howto;
 }

 #endif /* ! defined (coff_rtype_to_howto) */
 #endif /* ! defined (COFF_COMMON_ADDEND) */

 #ifdef COFF_COMMON_ADDEND

 /* If COFF_COMMON_ADDEND is defined, then when using m68k COFF the
    value stored in the .text section for a reference to a common
    symbol is the value itself plus any desired offset.  (taken from
    work done by Ian Taylor, Cygnus Support, for I386 COFF).  */

 /* If we are producing relocatable output, we need to do some
    adjustments to the object file that are not done by the
    bfd_perform_relocation function.  This function is called by every
    reloc type to make any required adjustments.  */

 static bfd_reloc_status_type
 m68kcoff_common_addend_special_fn (bfd *abfd,
 				   arelent *reloc_entry,
 				   asymbol *symbol,
 				   void * data,
 				   asection *input_section ATTRIBUTE_UNUSED,
 				   bfd *output_bfd,
 				   char **error_message ATTRIBUTE_UNUSED)
 {
   symvalue diff;

   if (output_bfd == (bfd *) NULL)
     return bfd_reloc_continue;

   if (bfd_is_com_section (symbol->section))
     {
       /* We are relocating a common symbol.  The current value in the
 	 object file is ORIG + OFFSET, where ORIG is the value of the
 	 common symbol as seen by the object file when it was compiled
 	 (this may be zero if the symbol was undefined) and OFFSET is
 	 the offset into the common symbol (normally zero, but may be
 	 non-zero when referring to a field in a common structure).
 	 ORIG is the negative of reloc_entry->addend, which is set by
 	 the CALC_ADDEND macro below.  We want to replace the value in
 	 the object file with NEW + OFFSET, where NEW is the value of
 	 the common symbol which we are going to put in the final
 	 object file.  NEW is symbol->value.  */
       diff = symbol->value + reloc_entry->addend;
     }
   else
     {
       /* For some reason bfd_perform_relocation always effectively
 	 ignores the addend for a COFF target when producing
 	 relocatable output.  This seems to be always wrong for 386
 	 COFF, so we handle the addend here instead.  */
       diff = reloc_entry->addend;
     }

 #define DOIT(x) \
   x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))

   if (diff != 0)
     {
       reloc_howto_type *howto = reloc_entry->howto;
       unsigned char *addr = (unsigned char *) data + reloc_entry->address;

       switch (howto->size)
 	{
 	case 0:
 	  {
 	    char x = bfd_get_8 (abfd, addr);
 	    DOIT (x);
 	    bfd_put_8 (abfd, x, addr);
 	  }
 	  break;

 	case 1:
 	  {
 	    short x = bfd_get_16 (abfd, addr);
 	    DOIT (x);
 	    bfd_put_16 (abfd, (bfd_vma) x, addr);
 	  }
 	  break;

 	case 2:
 	  {
 	    long x = bfd_get_32 (abfd, addr);
 	    DOIT (x);
 	    bfd_put_32 (abfd, (bfd_vma) x, addr);
 	  }
 	  break;

 	default:
 	  abort ();
 	}
     }

   /* Now let bfd_perform_relocation finish everything up.  */
   return bfd_reloc_continue;
 }

 /* Compute the addend of a reloc.  If the reloc is to a common symbol,
    the object file contains the value of the common symbol.  By the
    time this is called, the linker may be using a different symbol
    from a different object file with a different value.  Therefore, we
    hack wildly to locate the original symbol from this file so that we
    can make the correct adjustment.  This macro sets coffsym to the
    symbol from the original file, and uses it to set the addend value
    correctly.  If this is not a common symbol, the usual addend
    calculation is done, except that an additional tweak is needed for
    PC relative relocs.
    FIXME: This macro refers to symbols and asect; these are from the
    calling function, not the macro arguments.  */

 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr)		\
   {								\
     coff_symbol_type *coffsym = (coff_symbol_type *) NULL;	\
     if (ptr && bfd_asymbol_bfd (ptr) != abfd)			\
       coffsym = (obj_symbols (abfd)				\
 	         + (cache_ptr->sym_ptr_ptr - symbols));		\
     else if (ptr)						\
       coffsym = coff_symbol_from (ptr);				\
     if (coffsym != (coff_symbol_type *) NULL			\
 	&& coffsym->native->u.syment.n_scnum == 0)		\
       cache_ptr->addend = - coffsym->native->u.syment.n_value;	\
     else if (ptr && bfd_asymbol_bfd (ptr) == abfd		\
 	     && ptr->section != (asection *) NULL)		\
       cache_ptr->addend = - (ptr->section->vma + ptr->value);	\
     else							\
       cache_ptr->addend = 0;					\
     if (ptr && (reloc.r_type == R_PCRBYTE			\
 		|| reloc.r_type == R_PCRWORD			\
 		|| reloc.r_type == R_PCRLONG))			\
       cache_ptr->addend += asect->vma;				\
   }

 #ifndef coff_rtype_to_howto

 /* coff-m68k.c uses the special COFF backend linker.  We need to
    adjust common symbols.  */

 static reloc_howto_type *
 m68kcoff_common_addend_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
 				       asection *sec,
 				       struct internal_reloc *rel,
 				       struct coff_link_hash_entry *h,
 				       struct internal_syment *sym,
 				       bfd_vma *addendp)
 {
   arelent relent;
   reloc_howto_type *howto;

   relent.howto = NULL;
   RTYPE2HOWTO (&relent, rel);

   howto = relent.howto;

   if (howto->pc_relative)
     *addendp += sec->vma;

   if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
     {
       /* This is a common symbol.  The section contents include the
 	 size (sym->n_value) as an addend.  The relocate_section
 	 function will be adding in the final value of the symbol.  We
 	 need to subtract out the current size in order to get the
 	 correct result.  */
       BFD_ASSERT (h != NULL);
       *addendp -= sym->n_value;
     }

   /* If the output symbol is common (in which case this must be a
      relocatable link), we need to add in the final size of the
      common symbol.  */
   if (h != NULL && h->root.type == bfd_link_hash_common)
     *addendp += h->root.u.c.size;

   return howto;
 }

 #define coff_rtype_to_howto m68kcoff_common_addend_rtype_to_howto

 #endif /* ! defined (coff_rtype_to_howto) */

 #endif /* COFF_COMMON_ADDEND */

 #if !defined ONLY_DECLARE_RELOCS && ! defined STATIC_RELOCS
 /* Given a .data section and a .emreloc in-memory section, store
    relocation information into the .emreloc section which can be
    used at runtime to relocate the section.  This is called by the
    linker when the --embedded-relocs switch is used.  This is called
    after the add_symbols entry point has been called for all the
    objects, and before the final_link entry point is called.  */

 bfd_boolean
 bfd_m68k_coff_create_embedded_relocs (bfd *abfd,
 				      struct bfd_link_info *info,
 				      asection *datasec,
 				      asection *relsec,
 				      char **errmsg)
 {
   char *extsyms;
   bfd_size_type symesz;
   struct internal_reloc *irel, *irelend;
   bfd_byte *p;
   bfd_size_type amt;

   BFD_ASSERT (! bfd_link_relocatable (info));

   *errmsg = NULL;

   if (datasec->reloc_count == 0)
     return TRUE;

   extsyms = obj_coff_external_syms (abfd);
   symesz = bfd_coff_symesz (abfd);

   irel = _bfd_coff_read_internal_relocs (abfd, datasec, TRUE, NULL, FALSE,
 					 NULL);
   irelend = irel + datasec->reloc_count;

   amt = (bfd_size_type) datasec->reloc_count * 12;
   relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
   if (relsec->contents == NULL)
     return FALSE;

   p = relsec->contents;

   for (; irel < irelend; irel++, p += 12)
     {
       asection *targetsec;

       /* We are going to write a four byte longword into the runtime
        reloc section.  The longword will be the address in the data
        section which must be relocated.  It is followed by the name
        of the target section NUL-padded or truncated to 8
        characters.  */

       /* We can only relocate absolute longword relocs at run time.  */
       if (irel->r_type != R_RELLONG)
 	{
 	  *errmsg = _("unsupported reloc type");
 	  bfd_set_error (bfd_error_bad_value);
 	  return FALSE;
 	}

       if (irel->r_symndx == -1)
 	targetsec = bfd_abs_section_ptr;
       else
 	{
 	  struct coff_link_hash_entry *h;

 	  h = obj_coff_sym_hashes (abfd)[irel->r_symndx];
 	  if (h == NULL)
 	    {
 	      struct internal_syment isym;

 	      bfd_coff_swap_sym_in (abfd, extsyms + symesz * irel->r_symndx,
 				    &isym);
 	      targetsec = coff_section_from_bfd_index (abfd, isym.n_scnum);
 	    }
 	  else if (h->root.type == bfd_link_hash_defined
 		   || h->root.type == bfd_link_hash_defweak)
 	    targetsec = h->root.u.def.section;
 	  else
 	    targetsec = NULL;
 	}

       bfd_put_32 (abfd,
 		  (irel->r_vaddr - datasec->vma + datasec->output_offset), p);
       memset (p + 4, 0, 8);
       if (targetsec != NULL)
 	strncpy ((char *) p + 4, targetsec->output_section->name, 8);
     }

   return TRUE;
 }
 #endif /* neither ONLY_DECLARE_RELOCS not STATIC_RELOCS  */

 #define coff_bfd_is_local_label_name m68k_coff_is_local_label_name

 #define coff_relocate_section _bfd_coff_generic_relocate_section

 #ifndef bfd_pe_print_pdata
 #define bfd_pe_print_pdata	NULL
 #endif

 #include "coffcode.h"

 #ifndef TARGET_SYM
 #define TARGET_SYM m68k_coff_vec
 #endif

 #ifndef TARGET_NAME
 #define TARGET_NAME "coff-m68k"
 #endif

 #ifdef NAMES_HAVE_UNDERSCORE
 CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, '_', NULL, COFF_SWAP_TABLE)
 #else
 CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, 0, NULL, COFF_SWAP_TABLE)
 #endif
	/* BFD back-end for Motorola 68000 COFF binaries.
	Copyright (C) 1990-2017 Free Software Foundation, Inc.
	Written by Cygnus Support.

	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. */

	#include "sysdep.h"
	#include "bfd.h"
	#include "libbfd.h"
	#include "coff/m68k.h"
	#include "coff/internal.h"
	#include "libcoff.h"

	/* This source file is compiled multiple times for various m68k COFF
	variants. The following macros control its behaviour:

	TARGET_SYM
	The C name of the BFD target vector. The default is m68k_coff_vec.
	TARGET_NAME
	The user visible target name. The default is "coff-m68k".
	NAMES_HAVE_UNDERSCORE
	Whether symbol names have an underscore.
	ONLY_DECLARE_RELOCS
	Only declare the relocation howto array. Don't actually compile
	it. The actual array will be picked up in another version of the
	file.
	STATIC_RELOCS
	Make the relocation howto array, and associated functions, static.
	COFF_COMMON_ADDEND
	If this is defined, then, for a relocation against a common
	symbol, the object file holds the value (the size) of the common
	symbol. If this is not defined, then, for a relocation against a
	common symbol, the object file holds zero. */

	#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)

	#ifndef COFF_PAGE_SIZE
	/* The page size is a guess based on ELF. */
	#define COFF_PAGE_SIZE 0x2000
	#endif

	#ifndef COFF_COMMON_ADDEND
	#define RELOC_SPECIAL_FN 0
	#else
	static bfd_reloc_status_type m68kcoff_common_addend_special_fn
	(bfd , arelent , asymbol , void , asection , bfd , char **);

	#define RELOC_SPECIAL_FN m68kcoff_common_addend_special_fn
	#endif

	static bfd_boolean m68k_coff_is_local_label_name (bfd , const char );

	/* On the delta, a symbol starting with L% is local. We won't see
	such a symbol on other platforms, so it should be safe to always
	consider it local here. */

	static bfd_boolean
	m68k_coff_is_local_label_name (bfd abfd, const char name)
	{
	if (name[0] == 'L' && name[1] == '%')
	return TRUE;

	return _bfd_coff_is_local_label_name (abfd, name);
	}

	#ifndef STATIC_RELOCS
	/* Clean up namespace. */
	#define m68kcoff_howto_table _bfd_m68kcoff_howto_table
	#define m68k_rtype2howto _bfd_m68kcoff_rtype2howto
	#define m68k_howto2rtype _bfd_m68kcoff_howto2rtype
	#define m68k_reloc_type_lookup _bfd_m68kcoff_reloc_type_lookup
	#define m68k_reloc_name_lookup _bfd_m68kcoff_reloc_name_lookup
	#endif

	#ifdef ONLY_DECLARE_RELOCS
	extern reloc_howto_type m68kcoff_howto_table[];
	#else
	#ifdef STATIC_RELOCS
	static
	#endif
	reloc_howto_type m68kcoff_howto_table[] =
	{
	HOWTO (R_RELBYTE, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "8", TRUE, 0x000000ff,0x000000ff, FALSE),
	HOWTO (R_RELWORD, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
	HOWTO (R_RELLONG, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "32", TRUE, 0xffffffff,0xffffffff, FALSE),
	HOWTO (R_PCRBYTE, 0, 0, 8, TRUE, 0, complain_overflow_signed, RELOC_SPECIAL_FN, "DISP8", TRUE, 0x000000ff,0x000000ff, FALSE),
	HOWTO (R_PCRWORD, 0, 1, 16, TRUE, 0, complain_overflow_signed, RELOC_SPECIAL_FN, "DISP16", TRUE, 0x0000ffff,0x0000ffff, FALSE),
	HOWTO (R_PCRLONG, 0, 2, 32, TRUE, 0, complain_overflow_signed, RELOC_SPECIAL_FN, "DISP32", TRUE, 0xffffffff,0xffffffff, FALSE),
	HOWTO (R_RELLONG_NEG, 0, -2, 32, FALSE, 0, complain_overflow_bitfield, RELOC_SPECIAL_FN, "-32", TRUE, 0xffffffff,0xffffffff, FALSE),
	};
	#endif /* not ONLY_DECLARE_RELOCS */

	#ifndef BADMAG
	#define BADMAG(x) M68KBADMAG(x)
	#endif
	#define M68 1 /* Customize coffcode.h */

	/* Turn a howto into a reloc number */

	#ifdef ONLY_DECLARE_RELOCS
	extern void m68k_rtype2howto (arelent *internal, int relocentry);
	extern int m68k_howto2rtype (reloc_howto_type *);
	extern reloc_howto_type * m68k_reloc_type_lookup
	(bfd *, bfd_reloc_code_real_type);
	extern reloc_howto_type * m68k_reloc_name_lookup (bfd , const char );
	#else

	#ifdef STATIC_RELOCS
	#define STAT_REL static
	#else
	#define STAT_REL
	#endif

	STAT_REL void m68k_rtype2howto (arelent *, int);
	STAT_REL int m68k_howto2rtype (reloc_howto_type *);
	STAT_REL reloc_howto_type * m68k_reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
	STAT_REL reloc_howto_type * m68k_reloc_name_lookup (bfd , const char );

	STAT_REL void
	m68k_rtype2howto (arelent *internal, int relocentry)
	{
	switch (relocentry)
	{
	case R_RELBYTE: internal->howto = m68kcoff_howto_table + 0; break;
	case R_RELWORD: internal->howto = m68kcoff_howto_table + 1; break;
	case R_RELLONG: internal->howto = m68kcoff_howto_table + 2; break;
	case R_PCRBYTE: internal->howto = m68kcoff_howto_table + 3; break;
	case R_PCRWORD: internal->howto = m68kcoff_howto_table + 4; break;
	case R_PCRLONG: internal->howto = m68kcoff_howto_table + 5; break;
	case R_RELLONG_NEG: internal->howto = m68kcoff_howto_table + 6; break;
	default: internal->howto = NULL; break;
	}
	}

	STAT_REL int
	m68k_howto2rtype (reloc_howto_type * internal)
	{
	if (internal->pc_relative)
	{
	switch (internal->bitsize)
	{
	case 32: return R_PCRLONG;
	case 16: return R_PCRWORD;
	case 8: return R_PCRBYTE;
	}
	}
	else
	{
	switch (internal->bitsize)
	{
	case 32: return R_RELLONG;
	case 16: return R_RELWORD;
	case 8: return R_RELBYTE;
	}
	}
	return R_RELLONG;
	}

	STAT_REL reloc_howto_type *
	m68k_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	bfd_reloc_code_real_type code)
	{
	switch (code)
	{
	default: return NULL;
	case BFD_RELOC_8: return m68kcoff_howto_table + 0;
	case BFD_RELOC_16: return m68kcoff_howto_table + 1;
	case BFD_RELOC_CTOR:
	case BFD_RELOC_32: return m68kcoff_howto_table + 2;
	case BFD_RELOC_8_PCREL: return m68kcoff_howto_table + 3;
	case BFD_RELOC_16_PCREL: return m68kcoff_howto_table + 4;
	case BFD_RELOC_32_PCREL: return m68kcoff_howto_table + 5;
	/* FIXME: There doesn't seem to be a code for R_RELLONG_NEG. */
	}
	/NOTREACHED/
	}

	STAT_REL reloc_howto_type *
	m68k_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	const char *r_name)
	{
	unsigned int i;

	for (i = 0;
	i < sizeof (m68kcoff_howto_table) / sizeof (m68kcoff_howto_table[0]);
	i++)
	if (m68kcoff_howto_table[i].name != NULL
	&& strcasecmp (m68kcoff_howto_table[i].name, r_name) == 0)
	return &m68kcoff_howto_table[i];

	return NULL;
	}

	#endif /* not ONLY_DECLARE_RELOCS */

	#define RTYPE2HOWTO(internal, relocentry) \
	m68k_rtype2howto(internal, (relocentry)->r_type)

	#define SELECT_RELOC(external, internal) \
	external.r_type = m68k_howto2rtype (internal)

	#define coff_bfd_reloc_type_lookup m68k_reloc_type_lookup
	#define coff_bfd_reloc_name_lookup m68k_reloc_name_lookup

	#ifndef COFF_COMMON_ADDEND
	#ifndef coff_rtype_to_howto

	#define coff_rtype_to_howto m68kcoff_rtype_to_howto

	static reloc_howto_type *
	m68kcoff_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
	asection *sec,
	struct internal_reloc *rel,
	struct coff_link_hash_entry *h ATTRIBUTE_UNUSED,
	struct internal_syment *sym ATTRIBUTE_UNUSED,
	bfd_vma *addendp)
	{
	arelent relent;
	reloc_howto_type *howto;

	relent.howto = NULL;
	RTYPE2HOWTO (&relent, rel);

	howto = relent.howto;

	if (howto != NULL && howto->pc_relative)
	*addendp += sec->vma;

	return howto;
	}

	#endif /* ! defined (coff_rtype_to_howto) */
	#endif /* ! defined (COFF_COMMON_ADDEND) */

	#ifdef COFF_COMMON_ADDEND

	/* If COFF_COMMON_ADDEND is defined, then when using m68k COFF the
	value stored in the .text section for a reference to a common
	symbol is the value itself plus any desired offset. (taken from
	work done by Ian Taylor, Cygnus Support, for I386 COFF). */

	/* If we are producing relocatable output, we need to do some
	adjustments to the object file that are not done by the
	bfd_perform_relocation function. This function is called by every
	reloc type to make any required adjustments. */

	static bfd_reloc_status_type
	m68kcoff_common_addend_special_fn (bfd *abfd,
	arelent *reloc_entry,
	asymbol *symbol,
	void * data,
	asection *input_section ATTRIBUTE_UNUSED,
	bfd *output_bfd,
	char **error_message ATTRIBUTE_UNUSED)
	{
	symvalue diff;

	if (output_bfd == (bfd *) NULL)
	return bfd_reloc_continue;

	if (bfd_is_com_section (symbol->section))
	{
	/* We are relocating a common symbol. The current value in the
	object file is ORIG + OFFSET, where ORIG is the value of the
	common symbol as seen by the object file when it was compiled
	(this may be zero if the symbol was undefined) and OFFSET is
	the offset into the common symbol (normally zero, but may be
	non-zero when referring to a field in a common structure).
	ORIG is the negative of reloc_entry->addend, which is set by
	the CALC_ADDEND macro below. We want to replace the value in
	the object file with NEW + OFFSET, where NEW is the value of
	the common symbol which we are going to put in the final
	object file. NEW is symbol->value. */
	diff = symbol->value + reloc_entry->addend;
	}
	else
	{
	/* For some reason bfd_perform_relocation always effectively
	ignores the addend for a COFF target when producing
	relocatable output. This seems to be always wrong for 386
	COFF, so we handle the addend here instead. */
	diff = reloc_entry->addend;
	}

	#define DOIT(x) \
	x = ((x & ~howto->dst_mask) \| (((x & howto->src_mask) + diff) & howto->dst_mask))

	if (diff != 0)
	{
	reloc_howto_type *howto = reloc_entry->howto;
	unsigned char addr = (unsigned char ) data + reloc_entry->address;

	switch (howto->size)
	{
	case 0:
	{
	char x = bfd_get_8 (abfd, addr);
	DOIT (x);
	bfd_put_8 (abfd, x, addr);
	}
	break;

	case 1:
	{
	short x = bfd_get_16 (abfd, addr);
	DOIT (x);
	bfd_put_16 (abfd, (bfd_vma) x, addr);
	}
	break;

	case 2:
	{
	long x = bfd_get_32 (abfd, addr);
	DOIT (x);
	bfd_put_32 (abfd, (bfd_vma) x, addr);
	}
	break;

	default:
	abort ();
	}
	}

	/* Now let bfd_perform_relocation finish everything up. */
	return bfd_reloc_continue;
	}

	/* Compute the addend of a reloc. If the reloc is to a common symbol,
	the object file contains the value of the common symbol. By the
	time this is called, the linker may be using a different symbol
	from a different object file with a different value. Therefore, we
	hack wildly to locate the original symbol from this file so that we
	can make the correct adjustment. This macro sets coffsym to the
	symbol from the original file, and uses it to set the addend value
	correctly. If this is not a common symbol, the usual addend
	calculation is done, except that an additional tweak is needed for
	PC relative relocs.
	FIXME: This macro refers to symbols and asect; these are from the
	calling function, not the macro arguments. */

	#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
	{ \
	coff_symbol_type coffsym = (coff_symbol_type ) NULL; \
	if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
	coffsym = (obj_symbols (abfd) \
	+ (cache_ptr->sym_ptr_ptr - symbols)); \
	else if (ptr) \
	coffsym = coff_symbol_from (ptr); \
	if (coffsym != (coff_symbol_type *) NULL \
	&& coffsym->native->u.syment.n_scnum == 0) \
	cache_ptr->addend = - coffsym->native->u.syment.n_value; \
	else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
	&& ptr->section != (asection *) NULL) \
	cache_ptr->addend = - (ptr->section->vma + ptr->value); \
	else \
	cache_ptr->addend = 0; \
	if (ptr && (reloc.r_type == R_PCRBYTE \
	\|\| reloc.r_type == R_PCRWORD \
	\|\| reloc.r_type == R_PCRLONG)) \
	cache_ptr->addend += asect->vma; \
	}

	#ifndef coff_rtype_to_howto

	/* coff-m68k.c uses the special COFF backend linker. We need to
	adjust common symbols. */

	static reloc_howto_type *
	m68kcoff_common_addend_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
	asection *sec,
	struct internal_reloc *rel,
	struct coff_link_hash_entry *h,
	struct internal_syment *sym,
	bfd_vma *addendp)
	{
	arelent relent;
	reloc_howto_type *howto;

	relent.howto = NULL;
	RTYPE2HOWTO (&relent, rel);

	howto = relent.howto;

	if (howto->pc_relative)
	*addendp += sec->vma;

	if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
	{
	/* This is a common symbol. The section contents include the
	size (sym->n_value) as an addend. The relocate_section
	function will be adding in the final value of the symbol. We
	need to subtract out the current size in order to get the
	correct result. */
	BFD_ASSERT (h != NULL);
	*addendp -= sym->n_value;
	}

	/* If the output symbol is common (in which case this must be a
	relocatable link), we need to add in the final size of the
	common symbol. */
	if (h != NULL && h->root.type == bfd_link_hash_common)
	*addendp += h->root.u.c.size;

	return howto;
	}

	#define coff_rtype_to_howto m68kcoff_common_addend_rtype_to_howto

	#endif /* ! defined (coff_rtype_to_howto) */

	#endif /* COFF_COMMON_ADDEND */

	#if !defined ONLY_DECLARE_RELOCS && ! defined STATIC_RELOCS
	/* Given a .data section and a .emreloc in-memory section, store
	relocation information into the .emreloc section which can be
	used at runtime to relocate the section. This is called by the
	linker when the --embedded-relocs switch is used. This is called
	after the add_symbols entry point has been called for all the
	objects, and before the final_link entry point is called. */

	bfd_boolean
	bfd_m68k_coff_create_embedded_relocs (bfd *abfd,
	struct bfd_link_info *info,
	asection *datasec,
	asection *relsec,
	char **errmsg)
	{
	char *extsyms;
	bfd_size_type symesz;
	struct internal_reloc irel, irelend;
	bfd_byte *p;
	bfd_size_type amt;

	BFD_ASSERT (! bfd_link_relocatable (info));

	*errmsg = NULL;

	if (datasec->reloc_count == 0)
	return TRUE;

	extsyms = obj_coff_external_syms (abfd);
	symesz = bfd_coff_symesz (abfd);

	irel = _bfd_coff_read_internal_relocs (abfd, datasec, TRUE, NULL, FALSE,
	NULL);
	irelend = irel + datasec->reloc_count;

	amt = (bfd_size_type) datasec->reloc_count * 12;
	relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
	if (relsec->contents == NULL)
	return FALSE;

	p = relsec->contents;

	for (; irel < irelend; irel++, p += 12)
	{
	asection *targetsec;

	/* We are going to write a four byte longword into the runtime
	reloc section. The longword will be the address in the data
	section which must be relocated. It is followed by the name
	of the target section NUL-padded or truncated to 8
	characters. */

	/* We can only relocate absolute longword relocs at run time. */
	if (irel->r_type != R_RELLONG)
	{
	*errmsg = _("unsupported reloc type");
	bfd_set_error (bfd_error_bad_value);
	return FALSE;
	}

	if (irel->r_symndx == -1)
	targetsec = bfd_abs_section_ptr;
	else
	{
	struct coff_link_hash_entry *h;

	h = obj_coff_sym_hashes (abfd)[irel->r_symndx];
	if (h == NULL)
	{
	struct internal_syment isym;

	bfd_coff_swap_sym_in (abfd, extsyms + symesz * irel->r_symndx,
	&isym);
	targetsec = coff_section_from_bfd_index (abfd, isym.n_scnum);
	}
	else if (h->root.type == bfd_link_hash_defined
	\|\| h->root.type == bfd_link_hash_defweak)
	targetsec = h->root.u.def.section;
	else
	targetsec = NULL;
	}

	bfd_put_32 (abfd,
	(irel->r_vaddr - datasec->vma + datasec->output_offset), p);
	memset (p + 4, 0, 8);
	if (targetsec != NULL)
	strncpy ((char *) p + 4, targetsec->output_section->name, 8);
	}

	return TRUE;
	}
	#endif /* neither ONLY_DECLARE_RELOCS not STATIC_RELOCS */

	#define coff_bfd_is_local_label_name m68k_coff_is_local_label_name

	#define coff_relocate_section _bfd_coff_generic_relocate_section

	#ifndef bfd_pe_print_pdata
	#define bfd_pe_print_pdata NULL
	#endif

	#include "coffcode.h"

	#ifndef TARGET_SYM
	#define TARGET_SYM m68k_coff_vec
	#endif

	#ifndef TARGET_NAME
	#define TARGET_NAME "coff-m68k"
	#endif

	#ifdef NAMES_HAVE_UNDERSCORE
	CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, '_', NULL, COFF_SWAP_TABLE)
	#else
	CREATE_BIG_COFF_TARGET_VEC (TARGET_SYM, TARGET_NAME, D_PAGED, 0, 0, NULL, COFF_SWAP_TABLE)
	#endif