[deliverable/binutils-gdb.git] / bfd / elf32-m68k.c

/* Motorola 68k series support for 32-bit ELF
   Copyright 1993 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.  */

#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "libelf.h"

static reloc_howto_type *reloc_type_lookup
  PARAMS ((bfd *, bfd_reloc_code_real_type));
static void rtype_to_howto
  PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
static void rtype_to_howto_rel
  PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
static boolean elf_m68k_create_dynamic_sections
  PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf_m68k_create_got_section
  PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf_m68k_check_relocs
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
	   const Elf_Internal_Rela *));
static boolean elf_m68k_adjust_dynamic_symbol
  PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
static boolean elf_m68k_adjust_dynindx
  PARAMS ((struct elf_link_hash_entry *, PTR));
static boolean elf_m68k_size_dynamic_sections
  PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf_m68k_relocate_section
  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
	   Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
static boolean elf_m68k_finish_dynamic_symbol
  PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
	   Elf_Internal_Sym *));
static boolean elf_m68k_finish_dynamic_sections
  PARAMS ((bfd *, struct bfd_link_info *));

/* elf32 m68k code, generated by elf.el */
enum reloc_type {
  R_68K_NONE        =   0,
  R_68K_32          =   1,
  R_68K_16          =   2,
  R_68K_8           =   3,
  R_68K_PC32        =   4,
  R_68K_PC16        =   5,
  R_68K_PC8         =   6,
  R_68K_GOT32       =   7,
  R_68K_GOT16       =   8,
  R_68K_GOT8        =   9,
  R_68K_GOT32O      =  10,
  R_68K_GOT16O      =  11,
  R_68K_GOT8O       =  12,
  R_68K_PLT32       =  13,
  R_68K_PLT16       =  14,
  R_68K_PLT8        =  15,
  R_68K_PLT32O      =  16,
  R_68K_PLT16O      =  17,
  R_68K_PLT8O       =  18,
  R_68K_COPY        =  19,
  R_68K_GLOB_DAT    =  20,
  R_68K_JMP_SLOT    =  21,
  R_68K_RELATIVE    =  22,
  R_68K__max
};

static reloc_howto_type howto_table[] = {
  HOWTO(R_68K_NONE,       0, 0, 0, false,0, complain_overflow_dont,     bfd_elf_generic_reloc, "R_68K_NONE",      false, 0x00000000, 0x00000000,false),
  HOWTO(R_68K_32,         0, 2,32, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_32",        false, 0xffffffff, 0xffffffff,false),
  HOWTO(R_68K_16,         0, 1,16, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_16",        false, 0x0000ffff, 0x0000ffff,false),
  HOWTO(R_68K_8,          0, 0, 8, false,0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_68K_8",         false, 0x000000ff, 0x000000ff,false),
  HOWTO(R_68K_PC32,       0, 2,32, true, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PC32",      false, 0xffffffff, 0xffffffff,true),
  HOWTO(R_68K_PC16,       0, 1,16, true, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PC16",      false, 0x0000ffff, 0x0000ffff,true),
  HOWTO(R_68K_PC8,        0, 0, 8, true, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PC8",       false, 0x000000ff, 0x000000ff,true),
  HOWTO(R_68K_GOT32,      0, 2,32, true, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_GOT32",     false, 0xffffffff, 0xffffffff,true),
  HOWTO(R_68K_GOT16,      0, 1,16, true, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_GOT16",     false, 0x0000ffff, 0x0000ffff,true),
  HOWTO(R_68K_GOT8,       0, 0, 8, true, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_GOT8",      false, 0x000000ff, 0x000000ff,true),
  HOWTO(R_68K_GOT32O,     0, 2,32, false,0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_GOT32O",    false, 0xffffffff, 0xffffffff,false),
  HOWTO(R_68K_GOT16O,     0, 1,16, false,0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_GOT16O",    false, 0x0000ffff, 0x0000ffff,false),
  HOWTO(R_68K_GOT8O,      0, 0, 8, false,0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_GOT8O",     false, 0x000000ff, 0x000000ff,false),
  HOWTO(R_68K_PLT32,      0, 2,32, true, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PLT32",     false, 0xffffffff, 0xffffffff,true),
  HOWTO(R_68K_PLT16,      0, 1,16, true, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PLT16",     false, 0x0000ffff, 0x0000ffff,true),
  HOWTO(R_68K_PLT8,       0, 0, 8, true, 0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PLT8",      false, 0x000000ff, 0x000000ff,true),
  HOWTO(R_68K_PLT32O,     0, 2,32, false,0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PLT32O",    false, 0xffffffff, 0xffffffff,false),
  HOWTO(R_68K_PLT16O,     0, 1,16, false,0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PLT16O",    false, 0x0000ffff, 0x0000ffff,false),
  HOWTO(R_68K_PLT8O,      0, 0, 8, false,0, complain_overflow_signed,   bfd_elf_generic_reloc, "R_68K_PLT8O",     false, 0x000000ff, 0x000000ff,false),
  HOWTO(R_68K_COPY,       0, 0, 0, false,0, complain_overflow_dont,     bfd_elf_generic_reloc, "R_68K_COPY",      false, 0xffffffff, 0xffffffff,false),
  HOWTO(R_68K_GLOB_DAT,   0, 2,32, false,0, complain_overflow_dont,     bfd_elf_generic_reloc, "R_68K_GLOB_DAT",  false, 0xffffffff, 0xffffffff,false),
  HOWTO(R_68K_JMP_SLOT,   0, 2,32, false,0, complain_overflow_dont,     bfd_elf_generic_reloc, "R_68K_JMP_SLOT",  false, 0xffffffff, 0xffffffff,false),
  HOWTO(R_68K_RELATIVE,   0, 2,32, false,0, complain_overflow_dont,     bfd_elf_generic_reloc, "R_68K_RELATIVE",  false, 0xffffffff, 0xffffffff,false),
};

static void
rtype_to_howto (abfd, cache_ptr, dst)
     bfd *abfd;
     arelent *cache_ptr;
     Elf_Internal_Rela *dst;
{
  BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K__max);
  cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
}

static void
rtype_to_howto_rel (abfd, cache_ptr, dst)
     bfd *abfd;
     arelent *cache_ptr;
     Elf_Internal_Rel *dst;
{
  BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_68K__max);
  cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
}

#define elf_info_to_howto rtype_to_howto
#define elf_info_to_howto_rel rtype_to_howto_rel

static const struct { unsigned char bfd_val, elf_val; } reloc_map[] = {
  { BFD_RELOC_NONE, R_68K_NONE },
  { BFD_RELOC_32, R_68K_32 },
  { BFD_RELOC_16, R_68K_16 },
  { BFD_RELOC_8, R_68K_8 },
  { BFD_RELOC_32_PCREL, R_68K_PC32 },
  { BFD_RELOC_16_PCREL, R_68K_PC16 },
  { BFD_RELOC_8_PCREL, R_68K_PC8 },
  { BFD_RELOC_32_GOT_PCREL, R_68K_GOT32 },
  { BFD_RELOC_16_GOT_PCREL, R_68K_GOT16 },
  { BFD_RELOC_8_GOT_PCREL, R_68K_GOT8 },
  { BFD_RELOC_32_GOTOFF, R_68K_GOT32O },
  { BFD_RELOC_16_GOTOFF, R_68K_GOT16O },
  { BFD_RELOC_8_GOTOFF, R_68K_GOT8O },
  { BFD_RELOC_32_PLT_PCREL, R_68K_PLT32 },
  { BFD_RELOC_16_PLT_PCREL, R_68K_PLT16 },
  { BFD_RELOC_8_PLT_PCREL, R_68K_PLT8 },
  { BFD_RELOC_32_PLTOFF, R_68K_PLT32O },
  { BFD_RELOC_16_PLTOFF, R_68K_PLT16O },
  { BFD_RELOC_8_PLTOFF, R_68K_PLT8O },
  { BFD_RELOC_NONE, R_68K_COPY },
  { BFD_RELOC_68K_GLOB_DAT, R_68K_GLOB_DAT },
  { BFD_RELOC_68K_JMP_SLOT, R_68K_JMP_SLOT },
  { BFD_RELOC_68K_RELATIVE, R_68K_RELATIVE },
  { BFD_RELOC_CTOR, R_68K_32 },
};

static reloc_howto_type *
reloc_type_lookup (abfd, code)
     bfd *abfd;
     bfd_reloc_code_real_type code;
{
  int i;
  for (i = 0; i < sizeof (reloc_map) / sizeof (reloc_map[0]); i++)
    {
      if (reloc_map[i].bfd_val == code)
	return &howto_table[(int) reloc_map[i].elf_val];
    }
  return 0;
}

#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
#define ELF_ARCH bfd_arch_m68k
/* end code generated by elf.el */

#define USE_RELA

\f
/* Functions for the m68k ELF linker.  */

/* The name of the dynamic interpreter.  This is put in the .interp
   section.  */

#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"

/* The size in bytes of an entry in the procedure linkage table.  */

#define PLT_ENTRY_SIZE 20

/* The first entry in a procedure linkage table looks like this.  See
   the SVR4 ABI m68k supplement to see how this works.  */

static const bfd_byte elf_m68k_plt0_entry[PLT_ENTRY_SIZE] =
{
  0x2f, 0x3b, 0x01, 0x70, /* move.l (%pc,addr),-(%sp) */
  0, 0, 0, 0,		  /* replaced with address of .got + 4.  */
  0x4e, 0xfb, 0x01, 0x71, /* jmp ([%pc,addr]) */
  0, 0, 0, 0,		  /* replaced with address of .got + 8.  */
  0, 0, 0, 0		  /* pad out to 20 bytes.  */
};

/* Subsequent entries in a procedure linkage table look like this.  */

static const bfd_byte elf_m68k_plt_entry[PLT_ENTRY_SIZE] =
{
  0x4e, 0xfb, 0x01, 0x71, /* jmp ([addr]) */
  0, 0, 0, 0,		  /* replaced with address of this symbol in .got.  */
  0x2f, 0x3c,		  /* move.l #offset,-(%sp) */
  0, 0, 0, 0,		  /* replaced with offset into relocation table.  */
  0x60, 0xff,		  /* bra.l .plt */
  0, 0, 0, 0		  /* replaced with offset to start of .plt.  */
};

/* Create dynamic sections when linking against a dynamic object.  */

static boolean
elf_m68k_create_dynamic_sections (abfd, info)
     bfd *abfd;
     struct bfd_link_info *info;
{
  flagword flags;
  register asection *s;

  /* We need to create .plt, .rela.plt, .got, .got.plt, .dynbss, and
     .rela.bss sections.  */

  flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;

  s = bfd_make_section (abfd, ".plt");
  if (s == NULL
      || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY | SEC_CODE)
      || !bfd_set_section_alignment (abfd, s, 2))
    return false;

  s = bfd_make_section (abfd, ".rela.plt");
  if (s == NULL
      || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
      || !bfd_set_section_alignment (abfd, s, 2))
    return false;

  if (!elf_m68k_create_got_section (abfd, info))
    return false;

  /* The .dynbss section is a place to put symbols which are defined
     by dynamic objects, are referenced by regular objects, and are
     not functions.  We must allocate space for them in the process
     image and use a R_68K_COPY reloc to tell the dynamic linker to
     initialize them at run time.  The linker script puts the .dynbss
     section into the .bss section of the final image.  */
  s = bfd_make_section (abfd, ".dynbss");
  if (s == NULL
      || !bfd_set_section_flags (abfd, s, SEC_ALLOC))
    return false;

  /* The .rela.bss section holds copy relocs.  This section is not
     normally needed.  We need to create it here, though, so that the
     linker will map it to an output section.  We can't just create it
     only if we need it, because we will not know whether we need it
     until we have seen all the input files, and the first time the
     main linker code calls BFD after examining all the input files
     (size_dynamic_sections) the input sections have already been
     mapped to the output sections.  If the section turns out not to
     be needed, we can discard it later.  We will never need this
     section when generating a shared object, since they do not use
     copy relocs.  */
  if (!info->shared)
    {
      s = bfd_make_section (abfd, ".rela.bss");
      if (s == NULL
	  || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
	  || !bfd_set_section_alignment (abfd, s, 2))
	return false;
    }

  return true;
}

/* Create the .got section to hold the global offset table, and the
   .got.plt section to hold procedure linkage table GOT entries.  The
   linker script will put .got.plt into the output .got section.  */

static boolean
elf_m68k_create_got_section (abfd, info)
     bfd *abfd;
     struct bfd_link_info *info;
{
  flagword flags;
  register asection *s;
  struct elf_link_hash_entry *h;

  /* This function may be called more than once.  */
  if (bfd_get_section_by_name (abfd, ".got") != NULL)
    return true;

  flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;

  s = bfd_make_section (abfd, ".got");
  if (s == NULL
      || !bfd_set_section_flags (abfd, s, flags)
      || !bfd_set_section_alignment (abfd, s, 2))
    return false;

  s = bfd_make_section (abfd, ".got.plt");
  if (s == NULL
      || !bfd_set_section_flags (abfd, s, flags)
      || !bfd_set_section_alignment (abfd, s, 2))
    return false;

  /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
     .got.plt section, which will be placed at the start of the output
     .got section.  We don't do this in the linker script because we
     don't want to define the symbol if we are not creating a global
     offset table.  */
  h = NULL;
  if (!(_bfd_generic_link_add_one_symbol
	(info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, (bfd_vma) 0,
	 (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
	 (struct bfd_link_hash_entry **) &h)))
    return false;
  h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
  h->type = STT_OBJECT;

  if (info->shared
      && !bfd_elf32_link_record_dynamic_symbol (info, h))
    return false;

  /* The first three global offset table entries are reserved.  */
  s->_raw_size += 3 * 4;

  return true;
}

/* Look through the relocs for a section during the first phase, and
   allocate space in the global offset table or procedure linkage
   table.  */

static boolean
elf_m68k_check_relocs (abfd, info, sec, relocs)
     bfd *abfd;
     struct bfd_link_info *info;
     asection *sec;
     const Elf_Internal_Rela *relocs;
{
  bfd *dynobj;
  Elf_Internal_Shdr *symtab_hdr;
  struct elf_link_hash_entry **sym_hashes;
  bfd_vma *local_got_offsets;
  const Elf_Internal_Rela *rel;
  const Elf_Internal_Rela *rel_end;
  asection *sgot;
  asection *srelgot;
  asection *sreloc;

  if (info->relocateable)
    return true;

  dynobj = elf_hash_table (info)->dynobj;
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (abfd);
  local_got_offsets = elf_local_got_offsets (abfd);

  sgot = NULL;
  srelgot = NULL;
  sreloc = NULL;

  rel_end = relocs + sec->reloc_count;
  for (rel = relocs; rel < rel_end; rel++)
    {
      long r_symndx;
      struct elf_link_hash_entry *h;

      r_symndx = ELF32_R_SYM (rel->r_info);

      if (r_symndx < symtab_hdr->sh_info)
	h = NULL;
      else
	h = sym_hashes[r_symndx - symtab_hdr->sh_info];

      switch (ELF32_R_TYPE (rel->r_info))
	{
	case R_68K_GOT8:
	case R_68K_GOT16:
	case R_68K_GOT32:
	case R_68K_GOT8O:
	case R_68K_GOT16O:
	case R_68K_GOT32O:
	  /* This symbol requires a global offset table entry.  */

	  if (h != NULL
	      && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
	    break;

	  if (dynobj == NULL)
	    {
	      /* Create the .got section.  */
	      elf_hash_table (info)->dynobj = dynobj = abfd;
	      if (!elf_m68k_create_got_section (dynobj, info))
		return false;
	    }

	  if (sgot == NULL)
	    {
	      sgot = bfd_get_section_by_name (dynobj, ".got");
	      BFD_ASSERT (sgot != NULL);
	    }

	  if (srelgot == NULL
	      && (h != NULL || info->shared))
	    {
	      srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
	      if (srelgot == NULL)
		{
		  srelgot = bfd_make_section (dynobj, ".rela.got");
		  if (srelgot == NULL
		      || !bfd_set_section_flags (dynobj, srelgot,
						 (SEC_ALLOC
						  | SEC_LOAD
						  | SEC_HAS_CONTENTS
						  | SEC_IN_MEMORY
						  | SEC_READONLY))
		      || !bfd_set_section_alignment (dynobj, srelgot, 2))
		    return false;
		}
	    }

	  if (h != NULL)
	    {
	      if (h->got_offset != (bfd_vma) -1)
		{
		  /* We have already allocated space in the .got.  */
		  break;
		}
	      h->got_offset = sgot->_raw_size;

	      /* Make sure this symbol is output as a dynamic symbol.  */
	      if (h->dynindx == -1)
		{
		  if (!bfd_elf32_link_record_dynamic_symbol (info, h))
		    return false;
		}

	      srelgot->_raw_size += sizeof (Elf32_External_Rela);
	    }
	  else
	    {
	      /* This is a global offset table entry for a local
		 symbol.  */
	      if (local_got_offsets == NULL)
		{
		  size_t size;
		  register int i;

		  size = symtab_hdr->sh_info * sizeof (bfd_vma);
		  local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
		  if (local_got_offsets == NULL)
		    {
		      bfd_set_error (bfd_error_no_memory);
		      return false;
		    }
		  elf_local_got_offsets (abfd) = local_got_offsets;
		  for (i = 0; i < symtab_hdr->sh_info; i++)
		    local_got_offsets[i] = (bfd_vma) -1;
		}
	      if (local_got_offsets[r_symndx] != (bfd_vma) -1)
		{
		  /* We have already allocated space in the .got.  */
		  break;
		}
	      local_got_offsets[r_symndx] = sgot->_raw_size;

	      if (info->shared)
		{
		  /* If we are generating a shared object, we need to
		     output a R_68K_RELATIVE reloc so that the dynamic
		     linker can adjust this GOT entry.  */
		  srelgot->_raw_size += sizeof (Elf32_External_Rela);
		}
	    }

	  sgot->_raw_size += 4;
	  break;

	case R_68K_PLT8:
	case R_68K_PLT16:
	case R_68K_PLT32:
	case R_68K_PLT8O:
	case R_68K_PLT16O:
	case R_68K_PLT32O:
	  /* This symbol requires a procedure linkage table entry.  We
	     actually build the entry in adjust_dynamic_symbol,
	     because this might be a case of linking PIC code without
	     linking in any dynamic objects, in which case we don't
	     need to generate a procedure linkage table after all.  */
	  
	  /* If this is a local symbol, we resolve it directly without
	     creating a procedure linkage table entry.  */
	  if (h == NULL)
	    continue;

	  /* Make sure this symbol is output as a dynamic symbol.  */
	  if (h->dynindx == -1)
	    {
	      if (!bfd_elf32_link_record_dynamic_symbol (info, h))
		return false;
	    }

	  h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
	  break;

	case R_68K_8:
	case R_68K_16:
	case R_68K_32:
	case R_68K_PC8:
	case R_68K_PC16:
	case R_68K_PC32:
	  if (info->shared
	      && (sec->flags & SEC_ALLOC) != 0)
	    {
	      /* When creating a shared object, we must copy these
		 reloc types into the output file.  We create a reloc
		 section in dynobj and make room for this reloc.  */
	      if (sreloc == NULL)
		{
		  const char *name;

		  name = (elf_string_from_elf_section
			  (abfd,
			   elf_elfheader (abfd)->e_shstrndx,
			   elf_section_data (sec)->rel_hdr.sh_name));
		  if (name == NULL)
		    return false;

		  BFD_ASSERT (strncmp (name, ".rela", 5) == 0
			      && strcmp (bfd_get_section_name (abfd, sec),
					 name + 5) == 0);

		  sreloc = bfd_get_section_by_name (dynobj, name);
		  if (sreloc == NULL)
		    {
		      sreloc = bfd_make_section (dynobj, name);
		      if (sreloc == NULL
			  || !bfd_set_section_flags (dynobj, sreloc,
						     (SEC_ALLOC
						      | SEC_LOAD
						      | SEC_HAS_CONTENTS
						      | SEC_IN_MEMORY
						      | SEC_READONLY))
			  || !bfd_set_section_alignment (dynobj, sreloc, 2))
			return false;
		    }
		}

	      sreloc->_raw_size += sizeof (Elf32_External_Rela);
	    }

	  break;

	default:
	  break;
	}
    }

  return true;
}

/* Adjust a symbol defined by a dynamic object and referenced by a
   regular object.  The current definition is in some section of the
   dynamic object, but we're not including those sections.  We have to
   change the definition to something the rest of the link can
   understand.  */

static boolean
elf_m68k_adjust_dynamic_symbol (info, h)
     struct bfd_link_info *info;
     struct elf_link_hash_entry *h;
{
  bfd *dynobj;
  asection *s;
  unsigned int power_of_two;

  dynobj = elf_hash_table (info)->dynobj;

  /* Make sure we know what is going on here.  */
  BFD_ASSERT (dynobj != NULL);
  BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
	      || ((h->elf_link_hash_flags
		   & ELF_LINK_HASH_DEF_DYNAMIC) != 0
		  && (h->elf_link_hash_flags
		      & ELF_LINK_HASH_REF_REGULAR) != 0
		  && (h->elf_link_hash_flags
		      & ELF_LINK_HASH_DEF_REGULAR) == 0
		  && (h->root.type == bfd_link_hash_defined
		      || h->root.type == bfd_link_hash_defweak)
		  && (h->root.u.def.section->owner == NULL
		      || ((elf_elfheader (h->root.u.def.section->owner)->e_type
			   == ET_DYN)
			  && (bfd_get_flavour (h->root.u.def.section->owner)
			      == bfd_target_elf_flavour)
			  && h->root.u.def.section->output_section == NULL))));

  /* If this is a function, put it in the procedure linkage table.  We
     will fill in the contents of the procedure linkage table later,
     when we know the address of the .got section.  */
  if (h->type == STT_FUNC
      || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
    {
      if (!elf_hash_table (info)->dynamic_sections_created)
	{
	  /* This case can occur if we saw a PLT32 reloc in an input
	     file, but none of the input files were dynamic objects.
	     In such a case, we don't actually need to build a
	     procedure linkage table, and we can just do a PC32 reloc
	     instead.  */
	  BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0);
	  return true;
	}

      s = bfd_get_section_by_name (dynobj, ".plt");
      BFD_ASSERT (s != NULL);

      /* If this is the first .plt entry, make room for the special
	 first entry.  */
      if (s->_raw_size == 0)
	s->_raw_size += PLT_ENTRY_SIZE;

      /* If this symbol is not defined in a regular file, and we are
	 not generating a shared library, then set the symbol to this
	 location in the .plt.  This is required to make function
	 pointers compare as equal between the normal executable and
	 the shared library.  */
      if (!info->shared
	  && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
	{
	  h->root.u.def.section = s;
	  h->root.u.def.value = s->_raw_size;
	}

      h->plt_offset = s->_raw_size;

      /* Make room for this entry.  */
      s->_raw_size += PLT_ENTRY_SIZE;

      /* We also need to make an entry in the .got.plt section, which
	 will be placed in the .got section by the linker script.  */

      s = bfd_get_section_by_name (dynobj, ".got.plt");
      BFD_ASSERT (s != NULL);
      s->_raw_size += 4;

      /* We also need to make an entry in the .rela.plt section.  */

      s = bfd_get_section_by_name (dynobj, ".rela.plt");
      BFD_ASSERT (s != NULL);
      s->_raw_size += sizeof (Elf32_External_Rela);

      return true;
    }

  /* If this is a weak symbol, and there is a real definition, the
     processor independent code will have arranged for us to see the
     real definition first, and we can just use the same value.  */
  if (h->weakdef != NULL)
    {
      BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
		  || h->weakdef->root.type == bfd_link_hash_defweak);
      h->root.u.def.section = h->weakdef->root.u.def.section;
      h->root.u.def.value = h->weakdef->root.u.def.value;
      return true;
    }

  /* This is a reference to a symbol defined by a dynamic object which
     is not a function.  */

  /* If we are creating a shared library, we must presume that the
     only references to the symbol are via the global offset table.
     For such cases we need not do anything here; the relocations will
     be handled correctly by relocate_section.  */
  if (info->shared)
    return true;

  /* We must allocate the symbol in our .dynbss section, which will
     become part of the .bss section of the executable.  There will be
     an entry for this symbol in the .dynsym section.  The dynamic
     object will contain position independent code, so all references
     from the dynamic object to this symbol will go through the global
     offset table.  The dynamic linker will use the .dynsym entry to
     determine the address it must put in the global offset table, so
     both the dynamic object and the regular object will refer to the
     same memory location for the variable.  */

  s = bfd_get_section_by_name (dynobj, ".dynbss");
  BFD_ASSERT (s != NULL);

  /* If the symbol is currently defined in the .bss section of the
     dynamic object, then it is OK to simply initialize it to zero.
     If the symbol is in some other section, we must generate a
     R_68K_COPY reloc to tell the dynamic linker to copy the initial
     value out of the dynamic object and into the runtime process
     image.  We need to remember the offset into the .rela.bss section
     we are going to use.  */
  if ((h->root.u.def.section->flags & SEC_LOAD) != 0)
    {
      asection *srel;

      srel = bfd_get_section_by_name (dynobj, ".rela.bss");
      BFD_ASSERT (srel != NULL);
      srel->_raw_size += sizeof (Elf32_External_Rela);
      h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
    }

  /* We need to figure out the alignment required for this symbol.  I
     have no idea how ELF linkers handle this.  */
  power_of_two = bfd_log2 (h->size);
  if (power_of_two > 3)
    power_of_two = 3;

  /* Apply the required alignment.  */
  s->_raw_size = BFD_ALIGN (s->_raw_size,
			    (bfd_size_type) (1 << power_of_two));
  if (power_of_two > bfd_get_section_alignment (dynobj, s))
    {
      if (!bfd_set_section_alignment (dynobj, s, power_of_two))
	return false;
    }

  /* Define the symbol as being at this point in the section.  */
  h->root.u.def.section = s;
  h->root.u.def.value = s->_raw_size;

  /* Increment the section size to make room for the symbol.  */
  s->_raw_size += h->size;

  return true;
}

/* Set the sizes of the dynamic sections.  */

static boolean
elf_m68k_size_dynamic_sections (output_bfd, info)
     bfd *output_bfd;
     struct bfd_link_info *info;
{
  bfd *dynobj;
  asection *s;
  boolean plt;
  boolean relocs;
  boolean reltext;

  dynobj = elf_hash_table (info)->dynobj;
  BFD_ASSERT (dynobj != NULL);

  if (elf_hash_table (info)->dynamic_sections_created)
    {
      /* Set the contents of the .interp section to the interpreter.  */
      if (!info->shared)
	{
	  s = bfd_get_section_by_name (dynobj, ".interp");
	  BFD_ASSERT (s != NULL);
	  s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
	}
    }
  else
    {
      /* We may have created entries in the .rela.got section.
	 However, if we are not creating the dynamic sections, we will
	 not actually use these entries.  Reset the size of .rela.got,
	 which will cause it to get stripped from the output file
	 below.  */
      s = bfd_get_section_by_name (dynobj, ".rela.got");
      if (s != NULL)
	s->_raw_size = 0;
    }

  /* The check_relocs and adjust_dynamic_symbol entry points have
     determined the sizes of the various dynamic sections.  Allocate
     memory for them.  */
  plt = false;
  relocs = false;
  reltext = false;
  for (s = dynobj->sections; s != NULL; s = s->next)
    {
      const char *name;
      boolean strip;

      if ((s->flags & SEC_IN_MEMORY) == 0)
	continue;

      /* It's OK to base decisions on the section name, because none
	 of the dynobj section names depend upon the input files.  */
      name = bfd_get_section_name (dynobj, s);

      strip = false;

      if (strcmp (name, ".plt") == 0)
	{
	  if (s->_raw_size == 0)
	    {
	      /* Strip this section if we don't need it; see the
                 comment below.  */
	      strip = true;
	    }
	  else
	    {
	      /* Remember whether there is a PLT.  */
	      plt = true;
	    }
	}
      else if (strncmp (name, ".rela", 5) == 0)
	{
	  if (s->_raw_size == 0)
	    {
	      /* If we don't need this section, strip it from the
		 output file.  This is mostly to handle .rela.bss and
		 .rela.plt.  We must create both sections in
		 create_dynamic_sections, because they must be created
		 before the linker maps input sections to output
		 sections.  The linker does that before
		 adjust_dynamic_symbol is called, and it is that
		 function which decides whether anything needs to go
		 into these sections.  */
	      strip = true;
	    }
	  else
	    {
	      asection *target;

	      /* Remember whether there are any reloc sections other
                 than .rela.plt.  */
	      if (strcmp (name, ".rela.plt") != 0)
		{
		  relocs = true;

		  /* If this relocation section applies to a read only
		     section, then we probably need a DT_TEXTREL
		     entry.  .rela.plt is actually associated with
		     .got.plt, which is never readonly.  */
		  target = bfd_get_section_by_name (output_bfd, name + 5);
		  if (target != NULL
		      && (target->flags & SEC_READONLY) != 0)
		    reltext = true;
		}

	      /* We use the reloc_count field as a counter if we need
		 to copy relocs into the output file.  */
	      s->reloc_count = 0;
	    }
	}
      else if (strncmp (name, ".got", 4) != 0)
	{
	  /* It's not one of our sections, so don't allocate space.  */
	  continue;
	}

      if (strip)
	{
	  asection **spp;

	  for (spp = &s->output_section->owner->sections;
	       *spp != s->output_section;
	       spp = &(*spp)->next)
	    ;
	  *spp = s->output_section->next;
	  --s->output_section->owner->section_count;

	  continue;
	}

      /* Allocate memory for the section contents.  */
      s->contents = (bfd_byte *) bfd_alloc (dynobj, s->_raw_size);
      if (s->contents == NULL && s->_raw_size != 0)
	{
	  bfd_set_error (bfd_error_no_memory);
	  return false;
	}
    }

  if (elf_hash_table (info)->dynamic_sections_created)
    {
      /* Add some entries to the .dynamic section.  We fill in the
	 values later, in elf_m68k_finish_dynamic_sections, but we
	 must add the entries now so that we get the correct size for
	 the .dynamic section.  The DT_DEBUG entry is filled in by the
	 dynamic linker and used by the debugger.  */
      if (!info->shared)
	{
	  if (!bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
	    return false;
	}

      if (plt)
	{
	  if (!bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
	      || !bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
	      || !bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
	      || !bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
	    return false;
	}

      if (relocs)
	{
	  if (!bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
	      || !bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
	      || !bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
					       sizeof (Elf32_External_Rela)))
	    return false;
	}

      if (reltext)
	{
	  if (!bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
	    return false;
	}
    }

  /* If we are generating a shared library, we generate a section
     symbol for each output section.  These are local symbols, which
     means that they must come first in the dynamic symbol table.
     That means we must increment the dynamic symbol index of every
     other dynamic symbol.  */
  if (info->shared)
    {
      int c, i;

      c = bfd_count_sections (output_bfd);
      elf_link_hash_traverse (elf_hash_table (info),
			      elf_m68k_adjust_dynindx,
			      (PTR) &c);
      elf_hash_table (info)->dynsymcount += c;

      for (i = 1, s = output_bfd->sections; s != NULL; s = s->next, i++)
	{
	  elf_section_data (s)->dynindx = i;
	  /* These symbols will have no names, so we don't need to
             fiddle with dynstr_index.  */
	}
    }

  return true;
}

/* Increment the index of a dynamic symbol by a given amount.  Called
   via elf_link_hash_traverse.  */

static boolean
elf_m68k_adjust_dynindx (h, cparg)
     struct elf_link_hash_entry *h;
     PTR cparg;
{
  int *cp = (int *) cparg;

  if (h->dynindx != -1)
    h->dynindx += *cp;
  return true;
}

/* Relocate an M68K ELF section.  */

static boolean
elf_m68k_relocate_section (output_bfd, info, input_bfd, input_section,
			   contents, relocs, local_syms, local_sections)
     bfd *output_bfd;
     struct bfd_link_info *info;
     bfd *input_bfd;
     asection *input_section;
     bfd_byte *contents;
     Elf_Internal_Rela *relocs;
     Elf_Internal_Sym *local_syms;
     asection **local_sections;
{
  bfd *dynobj;
  Elf_Internal_Shdr *symtab_hdr;
  struct elf_link_hash_entry **sym_hashes;
  bfd_vma *local_got_offsets;
  asection *sgot;
  asection *sgotplt;
  asection *splt;
  asection *sreloc;
  Elf_Internal_Rela *rel;
  Elf_Internal_Rela *relend;

  dynobj = elf_hash_table (info)->dynobj;
  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (input_bfd);
  local_got_offsets = elf_local_got_offsets (input_bfd);

  sgot = NULL;
  sgotplt = NULL;
  splt = NULL;
  sreloc = NULL;

  rel = relocs;
  relend = relocs + input_section->reloc_count;
  for (; rel < relend; rel++)
    {
      int r_type;
      reloc_howto_type *howto;
      long r_symndx;
      struct elf_link_hash_entry *h;
      Elf_Internal_Sym *sym;
      asection *sec;
      bfd_vma relocation;
      bfd_reloc_status_type r;

      r_type = ELF32_R_TYPE (rel->r_info);
      if (r_type < 0 || r_type >= (int) R_68K__max)
	{
	  bfd_set_error (bfd_error_bad_value);
	  return false;
	}
      howto = howto_table + r_type;

      r_symndx = ELF32_R_SYM (rel->r_info);

      if (info->relocateable)
	{
	  /* This is a relocateable link.  We don't have to change
	     anything, unless the reloc is against a section symbol,
	     in which case we have to adjust according to where the
	     section symbol winds up in the output section.  */
	  if (r_symndx < symtab_hdr->sh_info)
	    {
	      sym = local_syms + r_symndx;
	      if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
		{
		  sec = local_sections[r_symndx];
		  rel->r_addend += sec->output_offset + sym->st_value;
		}
	    }

	  continue;
	}

      /* This is a final link.  */
      h = NULL;
      sym = NULL;
      sec = NULL;
      if (r_symndx < symtab_hdr->sh_info)
	{
	  sym = local_syms + r_symndx;
	  sec = local_sections[r_symndx];
	  relocation = (sec->output_section->vma
			+ sec->output_offset
			+ sym->st_value);
	}
      else
	{
	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	  if (h->root.type == bfd_link_hash_defined
	      || h->root.type == bfd_link_hash_defweak)
	    {
	      sec = h->root.u.def.section;
	      if (((r_type == R_68K_PLT8
		    || r_type == R_68K_PLT16
		    || r_type == R_68K_PLT32
		    || r_type == R_68K_PLT8O
		    || r_type == R_68K_PLT16O
		    || r_type == R_68K_PLT32O)
		   && h->plt_offset != (bfd_vma) -1)
		  || ((r_type == R_68K_GOT8O
		       || r_type == R_68K_GOT16O
		       || r_type == R_68K_GOT32O
		       || ((r_type == R_68K_GOT8
			    || r_type == R_68K_GOT16
			    || r_type == R_68K_GOT32)
			   && strcmp (h->root.root.string,
				      "_GLOBAL_OFFSET_TABLE_") != 0))
		      && elf_hash_table (info)->dynamic_sections_created)
		  || (info->shared
		      && (input_section->flags & SEC_ALLOC) != 0
		      && (r_type == R_68K_8
			  || r_type == R_68K_16
			  || r_type == R_68K_32
			  || r_type == R_68K_PC8
			  || r_type == R_68K_PC16
			  || r_type == R_68K_PC32)))
		{
		  /* In these cases, we don't need the relocation
		     value.  We check specially because in some
		     obscure cases sec->output_section will be NULL.  */
		  relocation = 0;
		}
	      else
		relocation = (h->root.u.def.value
			      + sec->output_section->vma
			      + sec->output_offset);
	    }
	  else if (h->root.type == bfd_link_hash_undefweak)
	    relocation = 0;
	  else if (info->shared)
	    relocation = 0;
	  else
	    {
	      if (!(info->callbacks->undefined_symbol
		    (info, h->root.root.string, input_bfd,
		     input_section, rel->r_offset)))
		return false;
	      relocation = 0;
	    }
	}

      switch (r_type)
	{
	case R_68K_GOT8:
	case R_68K_GOT16:
	case R_68K_GOT32:
	  /* Relocation is to the entry for this symbol in the global
	     offset table.  */
	  if (h != NULL
	      && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
	    break;
	  /* Fall through.  */
	case R_68K_GOT8O:
	case R_68K_GOT16O:
	case R_68K_GOT32O:
	  /* Relocation is the offset of the entry for this symbol in
	     the global offset table.  */

	  if (sgot == NULL)
	    {
	      sgot = bfd_get_section_by_name (dynobj, ".got");
	      BFD_ASSERT (sgot != NULL);
	    }

	  if (sgotplt == NULL)
	    {
	      sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
	      BFD_ASSERT (sgotplt != NULL);
	    }

	  if (h != NULL)
	    {
	      bfd_vma off;

	      off = h->got_offset;
	      BFD_ASSERT (off != (bfd_vma) -1);

	      if (!elf_hash_table (info)->dynamic_sections_created)
		{
		  /* This is actually a static link.  We must
		     initialize this entry in the global offset table.
		     Since the offset must always be a multiple of 4,
		     we use the least significant bit to record
		     whether we have initialized it already.

		     When doing a dynamic link, we create a .rela.got
		     relocation entry to initialize the value.  This
		     is done in the finish_dynamic_symbol routine.  */
		  if ((off & 1) != 0)
		    off &= ~1;
		  else
		    {
		      bfd_put_32 (output_bfd, relocation,
				  sgot->contents + off);
		      h->got_offset |= 1;
		    }
		}

	      relocation = sgot->output_offset + off;
	      if (r_type == R_68K_GOT8O
		  || r_type == R_68K_GOT16O
		  || r_type == R_68K_GOT32O)
		relocation -= sgotplt->output_offset;
	    }
	  else
	    {
	      bfd_vma off;

	      BFD_ASSERT (local_got_offsets != NULL
			  && local_got_offsets[r_symndx] != (bfd_vma) -1);

	      off = local_got_offsets[r_symndx];

	      /* The offset must always be a multiple of 4.  We use
		 the least significant bit to record whether we have
		 already generated the necessary reloc.  */
	      if ((off & 1) != 0)
		off &= ~1;
	      else
		{
		  bfd_put_32 (output_bfd, relocation, sgot->contents + off);

		  if (info->shared)
		    {
		      asection *srelgot;
		      Elf_Internal_Rela outrel;

		      srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
		      BFD_ASSERT (srelgot != NULL);

		      outrel.r_offset = (sgot->output_section->vma
					 + sgot->output_offset
					 + off);
		      outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
		      outrel.r_addend = 0;
		      bfd_elf32_swap_reloca_out (output_bfd, &outrel,
						 (((Elf32_External_Rela *)
						   srelgot->contents)
						  + srelgot->reloc_count));
		      ++srelgot->reloc_count;
		    }

		  local_got_offsets[r_symndx] |= 1;
		}

	      relocation = sgot->output_offset + off;
	      if (r_type == R_68K_GOT8O
		  || r_type == R_68K_GOT16O
		  || r_type == R_68K_GOT32O)
		relocation -= sgotplt->output_offset;
	    }

	  break;

	case R_68K_PLT8:
	case R_68K_PLT16:
	case R_68K_PLT32:
	  /* Relocation is to the entry for this symbol in the
	     procedure linkage table.  */

	  /* Resolve a PLT32 reloc against a local symbol directly,
	     without using the procedure linkage table.  */
	  if (h == NULL)
	    break;

	  if (h->plt_offset == (bfd_vma) -1)
	    {
	      /* We didn't make a PLT entry for this symbol.  This
		 happens when statically linking PIC code.  */
	      break;
	    }

	  if (splt == NULL)
	    {
	      splt = bfd_get_section_by_name (dynobj, ".plt");
	      BFD_ASSERT (splt != NULL);
	    }

	  relocation = (splt->output_section->vma
			+ splt->output_offset
			+ h->plt_offset);
	  break;

	case R_68K_PLT8O:
	case R_68K_PLT16O:
	case R_68K_PLT32O:
	  /* Relocation is the offset of the entry for this symbol in
	     the procedure linkage table.  */
	  BFD_ASSERT (h != NULL);

	  if (h->plt_offset == (bfd_vma) -1)
	    {
	      /* We didn't make a PLT entry for this symbol.  This
		 happens when statically linking PIC code.  */
	      break;
	    }

	  if (splt == NULL)
	    {
	      splt = bfd_get_section_by_name (dynobj, ".plt");
	      BFD_ASSERT (splt != NULL);
	    }

	  relocation = h->plt_offset;
	  break;

	case R_68K_8:
	case R_68K_16:
	case R_68K_32:
	case R_68K_PC8:
	case R_68K_PC16:
	case R_68K_PC32:
	  if (info->shared
	      && (input_section->flags & SEC_ALLOC) != 0)
	    {
	      Elf_Internal_Rela outrel;

	      /* When generating a shared object, these relocations
		 are copied into the output file to be resolved at run
		 time.  */

	      if (sreloc == NULL)
		{
		  const char *name;

		  name = (elf_string_from_elf_section
			  (input_bfd,
			   elf_elfheader (input_bfd)->e_shstrndx,
			   elf_section_data (input_section)->rel_hdr.sh_name));
		  if (name == NULL)
		    return false;

		  BFD_ASSERT (strncmp (name, ".rela", 5) == 0
			      && strcmp (bfd_get_section_name (input_bfd,
							       input_section),
					 name + 5) == 0);

		  sreloc = bfd_get_section_by_name (dynobj, name);
		  BFD_ASSERT (sreloc != NULL);
		}

	      outrel.r_offset = (rel->r_offset
				 + input_section->output_section->vma
				 + input_section->output_offset);
	      if (h != NULL)
		{
		  BFD_ASSERT (h->dynindx != -1);
		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
		  outrel.r_addend = rel->r_addend;
		}
	      else
		{
		  if (r_type == R_68K_32)
		    {
		      outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
		      outrel.r_addend = relocation + rel->r_addend;
		    }
		  else
		    {
		      long indx;

		      sym = local_syms + r_symndx;

		      BFD_ASSERT (ELF_ST_TYPE (sym->st_info) == STT_SECTION);

		      sec = local_sections[r_symndx];
		      if (sec != NULL && bfd_is_abs_section (sec))
			indx = 0;
		      else if (sec == NULL || sec->owner == NULL)
			{
			  bfd_set_error (bfd_error_bad_value);
			  return false;
			}
		      else
			{
			  asection *osec;

			  osec = sec->output_section;
			  indx = elf_section_data (osec)->dynindx;
			  if (indx == 0)
			    abort ();
			}

		      outrel.r_info = ELF32_R_INFO (indx, r_type);
		      outrel.r_addend = relocation + rel->r_addend;
		    }
		}

	      bfd_elf32_swap_reloca_out (output_bfd, &outrel,
					 (((Elf32_External_Rela *)
					   sreloc->contents)
					  + sreloc->reloc_count));
	      ++sreloc->reloc_count;

	      /* This reloc will be computed at runtime, so there's no
                 need to do anything now.  */
	      continue;
	    }

	  break;

	default:
	  break;
	}

      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
				    contents, rel->r_offset,
				    relocation, rel->r_addend);

      if (r != bfd_reloc_ok)
	{
	  switch (r)
	    {
	    default:
	    case bfd_reloc_outofrange:
	      abort ();
	    case bfd_reloc_overflow:
	      {
		const char *name;

		if (h != NULL)
		  name = h->root.root.string;
		else
		  {
		    name = elf_string_from_elf_section (input_bfd,
							symtab_hdr->sh_link,
							sym->st_name);
		    if (name == NULL)
		      return false;
		    if (*name == '\0')
		      name = bfd_section_name (input_bfd, sec);
		  }
		if (!(info->callbacks->reloc_overflow
		      (info, name, howto->name, (bfd_vma) 0,
		       input_bfd, input_section, rel->r_offset)))
		  return false;
	      }
	      break;
	    }
	}
    }

  return true;
}

/* Finish up dynamic symbol handling.  We set the contents of various
   dynamic sections here.  */

static boolean
elf_m68k_finish_dynamic_symbol (output_bfd, info, h, sym)
     bfd *output_bfd;
     struct bfd_link_info *info;
     struct elf_link_hash_entry *h;
     Elf_Internal_Sym *sym;
{
  bfd *dynobj;

  dynobj = elf_hash_table (info)->dynobj;

  if (h->plt_offset != (bfd_vma) -1)
    {
      asection *splt;
      asection *sgot;
      asection *srela;
      bfd_vma plt_index;
      bfd_vma got_offset;
      Elf_Internal_Rela rela;

      /* This symbol has an entry in the procedure linkage table.  Set
	 it up.  */

      BFD_ASSERT (h->dynindx != -1);

      splt = bfd_get_section_by_name (dynobj, ".plt");
      sgot = bfd_get_section_by_name (dynobj, ".got.plt");
      srela = bfd_get_section_by_name (dynobj, ".rela.plt");
      BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);

      /* Get the index in the procedure linkage table which
	 corresponds to this symbol.  This is the index of this symbol
	 in all the symbols for which we are making plt entries.  The
	 first entry in the procedure linkage table is reserved.  */
      plt_index = h->plt_offset / PLT_ENTRY_SIZE - 1;

      /* Get the offset into the .got table of the entry that
	 corresponds to this function.  Each .got entry is 4 bytes.
	 The first three are reserved.  */
      got_offset = (plt_index + 3) * 4;

      /* Fill in the entry in the procedure linkage table.  */
      memcpy (splt->contents + h->plt_offset, elf_m68k_plt_entry,
	      PLT_ENTRY_SIZE);
      /* The offset is relative to the first extension word.  */
      bfd_put_32 (output_bfd,
		  (sgot->output_section->vma
		   + sgot->output_offset
		   + got_offset
		   - (splt->output_section->vma
		      + h->plt_offset + 2)),
		  splt->contents + h->plt_offset + 4);

      bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
		  splt->contents + h->plt_offset + 10);
      bfd_put_32 (output_bfd, - (h->plt_offset + 16),
		  splt->contents + h->plt_offset + 16);

      /* Fill in the entry in the global offset table.  */
      bfd_put_32 (output_bfd,
		  (splt->output_section->vma
		   + splt->output_offset
		   + h->plt_offset
		   + 8),
		  sgot->contents + got_offset);

      /* Fill in the entry in the .rela.plt section.  */
      rela.r_offset = (sgot->output_section->vma
		       + sgot->output_offset
		       + got_offset);
      rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_JMP_SLOT);
      rela.r_addend = 0;
      bfd_elf32_swap_reloca_out (output_bfd, &rela,
				 ((Elf32_External_Rela *) srela->contents
				  + plt_index));

      if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
	{
	  /* Mark the symbol as undefined, rather than as defined in
	     the .plt section.  Leave the value alone.  */
	  sym->st_shndx = SHN_UNDEF;
	}
    }

  if (h->got_offset != (bfd_vma) -1)
    {
      asection *sgot;
      asection *srela;
      Elf_Internal_Rela rela;

      /* This symbol has an entry in the global offset table.  Set it
	 up.  */
      
      BFD_ASSERT (h->dynindx != -1);

      sgot = bfd_get_section_by_name (dynobj, ".got");
      srela = bfd_get_section_by_name (dynobj, ".rela.got");
      BFD_ASSERT (sgot != NULL && srela != NULL);

      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got_offset);

      rela.r_offset = (sgot->output_section->vma
		       + sgot->output_offset
		       + h->got_offset);
      rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_GLOB_DAT);
      rela.r_addend = 0;
      bfd_elf32_swap_reloca_out (output_bfd, &rela,
				 ((Elf32_External_Rela *) srela->contents
				  + srela->reloc_count));
      ++srela->reloc_count;
    }

  if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
    {
      asection *s;
      Elf_Internal_Rela rela;

      /* This symbol needs a copy reloc.  Set it up.  */

      BFD_ASSERT (h->dynindx != -1
		  && (h->root.type == bfd_link_hash_defined
		      || h->root.type == bfd_link_hash_defweak));

      s = bfd_get_section_by_name (h->root.u.def.section->owner,
				   ".rela.bss");
      BFD_ASSERT (s != NULL);

      rela.r_offset = (h->root.u.def.value
		       + h->root.u.def.section->output_section->vma
		       + h->root.u.def.section->output_offset);
      rela.r_info = ELF32_R_INFO (h->dynindx, R_68K_COPY);
      rela.r_addend = 0;
      bfd_elf32_swap_reloca_out (output_bfd, &rela,
				 ((Elf32_External_Rela *) s->contents
				  + s->reloc_count));
      ++s->reloc_count;
    }

  /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
  if (strcmp (h->root.root.string, "_DYNAMIC") == 0
      || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
    sym->st_shndx = SHN_ABS;

  return true;
}

/* Finish up the dynamic sections.  */

static boolean
elf_m68k_finish_dynamic_sections (output_bfd, info)
     bfd *output_bfd;
     struct bfd_link_info *info;
{
  bfd *dynobj;
  asection *sgot;
  asection *sdyn;

  dynobj = elf_hash_table (info)->dynobj;

  sgot = bfd_get_section_by_name (dynobj, ".got.plt");
  BFD_ASSERT (sgot != NULL);
  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");

  if (elf_hash_table (info)->dynamic_sections_created)
    {
      asection *splt;
      Elf32_External_Dyn *dyncon, *dynconend;

      splt = bfd_get_section_by_name (dynobj, ".plt");
      BFD_ASSERT (splt != NULL && sdyn != NULL);

      dyncon = (Elf32_External_Dyn *) sdyn->contents;
      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
      for (; dyncon < dynconend; dyncon++)
	{
	  Elf_Internal_Dyn dyn;
	  const char *name;
	  asection *s;

	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);

	  switch (dyn.d_tag)
	    {
	    default:
	      break;

	    case DT_PLTGOT:
	      name = ".got";
	      goto get_vma;
	    case DT_JMPREL:
	      name = ".rela.plt";
	    get_vma:
	      s = bfd_get_section_by_name (output_bfd, name);
	      BFD_ASSERT (s != NULL);
	      dyn.d_un.d_ptr = s->vma;
	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
	      break;

	    case DT_PLTRELSZ:
	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
	      BFD_ASSERT (s != NULL);
	      if (s->_cooked_size != 0)
		dyn.d_un.d_val = s->_cooked_size;
	      else
		dyn.d_un.d_val = s->_raw_size;
	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
	      break;

	    case DT_RELASZ:
	      /* My reading of the SVR4 ABI indicates that the
		 procedure linkage table relocs (DT_JMPREL) should be
		 included in the overall relocs (DT_RELA).  This is
		 what Solaris does.  However, UnixWare can not handle
		 that case.  Therefore, we override the DT_RELASZ entry
		 here to make it not include the JMPREL relocs.  Since
		 the linker script arranges for .rela.plt to follow all
		 other relocation sections, we don't have to worry
		 about changing the DT_RELA entry.  */
	      /* FIXME: This comment is from elf32-i386.c, what about
		 the SVR4/m68k implementations? */
	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
	      if (s != NULL)
		{
		  if (s->_cooked_size != 0)
		    dyn.d_un.d_val -= s->_cooked_size;
		  else
		    dyn.d_un.d_val -= s->_raw_size;
		}
	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
	      break;
	    }
	}

      /* Fill in the first entry in the procedure linkage table.  */
      if (splt->_raw_size > 0)
	{
	  memcpy (splt->contents, elf_m68k_plt0_entry, PLT_ENTRY_SIZE);
	  bfd_put_32 (output_bfd,
		      (sgot->output_section->vma
		       + sgot->output_offset + 4
		       - (splt->output_section->vma + 2)),
		      splt->contents + 4);
	  bfd_put_32 (output_bfd,
		      (sgot->output_section->vma
		       + sgot->output_offset + 8
		       - (splt->output_section->vma + 10)),
		      splt->contents + 12);
	}

      elf_section_data (splt->output_section)->this_hdr.sh_entsize
	= PLT_ENTRY_SIZE;
    }

  /* Fill in the first three entries in the global offset table.  */
  if (sgot->_raw_size > 0)
    {
      if (sdyn == NULL)
	bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
      else
	bfd_put_32 (output_bfd,
		    sdyn->output_section->vma + sdyn->output_offset,
		    sgot->contents);
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
      bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
    }

  elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;

  return true;
}

#define TARGET_BIG_SYM			bfd_elf32_m68k_vec
#define TARGET_BIG_NAME			"elf32-m68k"
#define ELF_MACHINE_CODE		EM_68K
#define ELF_MAXPAGESIZE			0x2000
#define elf_backend_create_dynamic_sections \
					elf_m68k_create_dynamic_sections
#define elf_backend_check_relocs	elf_m68k_check_relocs
#define elf_backend_adjust_dynamic_symbol \
					elf_m68k_adjust_dynamic_symbol
#define elf_backend_size_dynamic_sections \
					elf_m68k_size_dynamic_sections
#define elf_backend_relocate_section	elf_m68k_relocate_section
#define elf_backend_finish_dynamic_symbol \
					elf_m68k_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections \
					elf_m68k_finish_dynamic_sections

#include "elf32-target.h"