/* V850-specific support for 32-bit ELF
   Copyright (C) 1996, 1997, 1998 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */



/* XXX FIXME: This code is littered with 32bit int, 16bit short, 8bit char
   dependencies.  As is the gas & simulator code or the v850.  */


#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/v850.h"

/* sign-extend a 24-bit number */
#define SEXT24(x)	((((x) & 0xffffff) ^ (~ 0x7fffff)) + 0x800000)
      
static reloc_howto_type *v850_elf_reloc_type_lookup
  PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
static void v850_elf_info_to_howto_rel
  PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
static bfd_reloc_status_type v850_elf_reloc
  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static boolean v850_elf_is_local_label_name PARAMS ((bfd *, const char *));
static boolean v850_elf_relocate_section PARAMS((bfd *,
						 struct bfd_link_info *,
						 bfd *,
						 asection *,
						 bfd_byte *,
						 Elf_Internal_Rela *,
						 Elf_Internal_Sym *,
						 asection **));
/* Try to minimize the amount of space occupied by relocation tables
   on the ROM (not that the ROM won't be swamped by other ELF overhead).  */
#define USE_REL

/* Note: It is REQUIRED that the 'type' value of each entry in this array
   match the index of the entry in the array.  */
static reloc_howto_type v850_elf_howto_table[] =
{
  /* This reloc does nothing.  */
  HOWTO (R_V850_NONE,			/* type */
	 0,				/* rightshift */
	 2,				/* size (0 = byte, 1 = short, 2 = long) */
	 32,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_bitfield,	/* complain_on_overflow */
	 bfd_elf_generic_reloc,		/* special_function */
	 "R_V850_NONE",			/* name */
	 false,				/* partial_inplace */
	 0,				/* src_mask */
	 0,				/* dst_mask */
	 false),			/* pcrel_offset */

  /* A PC relative 9 bit branch. */
  HOWTO (R_V850_9_PCREL,		/* type */
	 2,				/* rightshift */
	 2,				/* size (0 = byte, 1 = short, 2 = long) */
	 26,				/* bitsize */
	 true,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_bitfield,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_9_PCREL",		/* name */
	 false,				/* partial_inplace */
	 0x00ffffff,			/* src_mask */
	 0x00ffffff,			/* dst_mask */
	 true),				/* pcrel_offset */

  /* A PC relative 22 bit branch. */
  HOWTO (R_V850_22_PCREL,		/* type */
	 2,				/* rightshift */
	 2,				/* size (0 = byte, 1 = short, 2 = long) */
	 22,				/* bitsize */
	 true,				/* pc_relative */
	 7,				/* bitpos */
	 complain_overflow_signed,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_22_PCREL",		/* name */
	 false,				/* partial_inplace */
	 0x07ffff80,			/* src_mask */
	 0x07ffff80,			/* dst_mask */
	 true),				/* pcrel_offset */

  /* High 16 bits of symbol value.  */
  HOWTO (R_V850_HI16_S,			/* type */
	 0,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_HI16_S",		/* name */
	 true,				/* partial_inplace */
	 0xffff,			/* src_mask */
	 0xffff,			/* dst_mask */
	 false),			/* pcrel_offset */

  /* High 16 bits of symbol value.  */
  HOWTO (R_V850_HI16,			/* type */
	 0,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_HI16",			/* name */
	 true,				/* partial_inplace */
	 0xffff,			/* src_mask */
	 0xffff,			/* dst_mask */
	 false),			/* pcrel_offset */

  /* Low 16 bits of symbol value.  */
  HOWTO (R_V850_LO16,			/* type */
	 0,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_LO16",			/* name */
	 true,				/* partial_inplace */
	 0xffff,			/* src_mask */
	 0xffff,			/* dst_mask */
	 false),			/* pcrel_offset */

  /* Simple 32bit reloc.  */
  HOWTO (R_V850_32,			/* type */
	 0,				/* rightshift */
	 2,				/* size (0 = byte, 1 = short, 2 = long) */
	 32,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_32",			/* name */
	 true,				/* partial_inplace */
	 0xffffffff,			/* src_mask */
	 0xffffffff,			/* dst_mask */
	 false),			/* pcrel_offset */

  /* Simple 16bit reloc.  */
  HOWTO (R_V850_16,			/* type */
	 0,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 bfd_elf_generic_reloc,		/* special_function */
	 "R_V850_16",			/* name */
	 true,				/* partial_inplace */
	 0xffff,			/* src_mask */
	 0xffff,			/* dst_mask */
	 false),			/* pcrel_offset */

  /* Simple 8bit reloc.	 */
  HOWTO (R_V850_8,			/* type */
	 0,				/* rightshift */
	 0,				/* size (0 = byte, 1 = short, 2 = long) */
	 8,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 bfd_elf_generic_reloc,		/* special_function */
	 "R_V850_8",			/* name */
	 true,				/* partial_inplace */
	 0xff,				/* src_mask */
	 0xff,				/* dst_mask */
	 false),			/* pcrel_offset */

  /* 16 bit offset from the short data area pointer.  */
  HOWTO (R_V850_SDA_16_16_OFFSET,	/* type */
	 0,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_SDA_16_16_OFFSET",	/* name */
	 false,				/* partial_inplace */
	 0xffff,			/* src_mask */
	 0xffff,			/* dst_mask */
	 false),			/* pcrel_offset */

  /* 15 bit offset from the short data area pointer.  */
  HOWTO (R_V850_SDA_15_16_OFFSET,	/* type */
	 1,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 false,				/* pc_relative */
	 1,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_SDA_15_16_OFFSET",	/* name */
	 false,				/* partial_inplace */
	 0xfffe,			/* src_mask */
	 0xfffe,			/* dst_mask */
	 false),			/* pcrel_offset */

  /* 16 bit offset from the zero data area pointer.  */
  HOWTO (R_V850_ZDA_16_16_OFFSET,	/* type */
	 0,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_ZDA_16_16_OFFSET",	/* name */
	 false,				/* partial_inplace */
	 0xffff,			/* src_mask */
	 0xffff,			/* dst_mask */
	 false),			/* pcrel_offset */

  /* 15 bit offset from the zero data area pointer.  */
  HOWTO (R_V850_ZDA_15_16_OFFSET,	/* type */
	 1,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 false,				/* pc_relative */
	 1,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_ZDA_15_16_OFFSET",	/* name */
	 false,				/* partial_inplace */
	 0xfffe,			/* src_mask */
	 0xfffe,			/* dst_mask */
	 false),			/* pcrel_offset */

  /* 6 bit offset from the tiny data area pointer.  */
  HOWTO (R_V850_TDA_6_8_OFFSET,		/* type */
	 2,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 8,				/* bitsize */
	 false,				/* pc_relative */
	 1,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_TDA_6_8_OFFSET",	/* name */
	 false,				/* partial_inplace */
	 0x7e,				/* src_mask */
	 0x7e,				/* dst_mask */
	 false),			/* pcrel_offset */

  /* 8 bit offset from the tiny data area pointer.  */
  HOWTO (R_V850_TDA_7_8_OFFSET,		/* type */
	 1,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 8,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_TDA_7_8_OFFSET",	/* name */
	 false,				/* partial_inplace */
	 0x7f,				/* src_mask */
	 0x7f,				/* dst_mask */
	 false),			/* pcrel_offset */
  
  /* 7 bit offset from the tiny data area pointer.  */
  HOWTO (R_V850_TDA_7_7_OFFSET,		/* type */
	 0,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 7,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_TDA_7_7_OFFSET",	/* name */
	 false,				/* partial_inplace */
	 0x7f,				/* src_mask */
	 0x7f,				/* dst_mask */
	 false),			/* pcrel_offset */

  /* 16 bit offset from the tiny data area pointer!  */
  HOWTO (R_V850_TDA_16_16_OFFSET,	/* type */
	 0,				/* rightshift */
	 1,				/* size (0 = byte, 1 = short, 2 = long) */
	 16,				/* bitsize */
	 false,				/* pc_relative */
	 0,				/* bitpos */
	 complain_overflow_dont,	/* complain_on_overflow */
	 v850_elf_reloc,		/* special_function */
	 "R_V850_TDA_16_16_OFFSET",	/* name */
	 false,				/* partial_inplace */
	 0xffff,			/* src_mask */
	 0xfff,				/* dst_mask */
	 false),			/* pcrel_offset */

};

/* Map BFD reloc types to V850 ELF reloc types.  */

struct v850_elf_reloc_map
{
  unsigned char bfd_reloc_val;
  unsigned char elf_reloc_val;
};

static const struct v850_elf_reloc_map v850_elf_reloc_map[] =
{
  { BFD_RELOC_NONE,		R_V850_NONE },
  { BFD_RELOC_V850_9_PCREL,	R_V850_9_PCREL },
  { BFD_RELOC_V850_22_PCREL,	R_V850_22_PCREL },
  { BFD_RELOC_HI16_S,		R_V850_HI16_S },
  { BFD_RELOC_HI16,		R_V850_HI16 },
  { BFD_RELOC_LO16,		R_V850_LO16 },
  { BFD_RELOC_32,		R_V850_32 },
  { BFD_RELOC_16,		R_V850_16 },
  { BFD_RELOC_8,		R_V850_8 },
  { BFD_RELOC_V850_SDA_16_16_OFFSET, R_V850_SDA_16_16_OFFSET },
  { BFD_RELOC_V850_SDA_15_16_OFFSET, R_V850_SDA_15_16_OFFSET },
  { BFD_RELOC_V850_ZDA_16_16_OFFSET, R_V850_ZDA_16_16_OFFSET },
  { BFD_RELOC_V850_ZDA_15_16_OFFSET, R_V850_ZDA_15_16_OFFSET },
  { BFD_RELOC_V850_TDA_6_8_OFFSET,   R_V850_TDA_6_8_OFFSET   },
  { BFD_RELOC_V850_TDA_7_8_OFFSET,   R_V850_TDA_7_8_OFFSET   },
  { BFD_RELOC_V850_TDA_7_7_OFFSET,   R_V850_TDA_7_7_OFFSET   },
  { BFD_RELOC_V850_TDA_16_16_OFFSET, R_V850_TDA_16_16_OFFSET },
};


/* Map a bfd relocation into the appropriate howto structure */
static reloc_howto_type *
v850_elf_reloc_type_lookup (abfd, code)
     bfd *                     abfd;
     bfd_reloc_code_real_type  code;
{
  unsigned int i;

  for (i = 0;
       i < sizeof (v850_elf_reloc_map) / sizeof (struct v850_elf_reloc_map);
       i++)
    {
      if (v850_elf_reloc_map[i].bfd_reloc_val == code)
	{
	  BFD_ASSERT (v850_elf_howto_table[v850_elf_reloc_map[i].elf_reloc_val].type == v850_elf_reloc_map[i].elf_reloc_val);
	  
	  return & v850_elf_howto_table[v850_elf_reloc_map[i].elf_reloc_val];
	}
    }

  return NULL;
}


/* Set the howto pointer for an V850 ELF reloc.  */
static void
v850_elf_info_to_howto_rel (abfd, cache_ptr, dst)
     bfd *                 abfd;
     arelent *             cache_ptr;
     Elf32_Internal_Rel *  dst;
{
  unsigned int r_type;

  r_type = ELF32_R_TYPE (dst->r_info);
  BFD_ASSERT (r_type < (unsigned int) R_V850_max);
  cache_ptr->howto = &v850_elf_howto_table[r_type];
}


/* 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
v850_elf_check_relocs (abfd, info, sec, relocs)
     bfd *                      abfd;
     struct bfd_link_info *     info;
     asection *                 sec;
     const Elf_Internal_Rela *  relocs;
{
  boolean ret = true;
  bfd *dynobj;
  Elf_Internal_Shdr *symtab_hdr;
  struct elf_link_hash_entry **sym_hashes;
  const Elf_Internal_Rela *rel;
  const Elf_Internal_Rela *rel_end;
  asection *sreloc;
  enum v850_reloc_type r_type;
  int other = 0;
  const char *common = (const char *)0;

  if (info->relocateable)
    return true;

#ifdef DEBUG
  fprintf (stderr, "v850_elf_check_relocs called for section %s in %s\n",
	   bfd_get_section_name (abfd, sec),
	   bfd_get_filename (abfd));
#endif

  dynobj = elf_hash_table (info)->dynobj;
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (abfd);
  sreloc = NULL;

  rel_end = relocs + sec->reloc_count;
  for (rel = relocs; rel < rel_end; rel++)
    {
      unsigned 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];

      r_type = (enum v850_reloc_type) ELF32_R_TYPE (rel->r_info);
      switch (r_type)
	{
	default:
	case R_V850_NONE:
	case R_V850_9_PCREL:
	case R_V850_22_PCREL:
	case R_V850_HI16_S:
	case R_V850_HI16:
	case R_V850_LO16:
	case R_V850_32:
	case R_V850_16:
	case R_V850_8:
	  break;

	case R_V850_SDA_16_16_OFFSET:
	case R_V850_SDA_15_16_OFFSET:
	  other = V850_OTHER_SDA;
	  common = ".scommon";
	  goto small_data_common;
	  
	case R_V850_ZDA_16_16_OFFSET:
	case R_V850_ZDA_15_16_OFFSET:
	  other = V850_OTHER_ZDA;
	  common = ".zcommon";
	  goto small_data_common;
	  
	case R_V850_TDA_6_8_OFFSET:
	case R_V850_TDA_7_8_OFFSET:
	case R_V850_TDA_7_7_OFFSET:
	case R_V850_TDA_16_16_OFFSET:
	  other = V850_OTHER_TDA;
	  common = ".tcommon";
	  /* fall through */

#define V850_OTHER_MASK (V850_OTHER_TDA | V850_OTHER_SDA | V850_OTHER_ZDA)

	small_data_common:
	  if (h)
	    {
	      h->other |= other;	/* flag which type of relocation was used */
	      if ((h->other & V850_OTHER_MASK) != (other & V850_OTHER_MASK)
		  && (h->other & V850_OTHER_ERROR) == 0)
		{
		  const char * msg;
		  static char  buff[100]; /* XXX */
		  
		  switch (h->other & V850_OTHER_MASK)
		    {
		    default:
		      msg = "cannot occupy in multiple small data regions";
		      break;
		    case V850_OTHER_SDA | V850_OTHER_ZDA | V850_OTHER_TDA:
		      msg = "can only be in one of the small, zero, and tiny data regions";
		      break;
		    case V850_OTHER_SDA | V850_OTHER_ZDA:
		      msg = "cannot be in both small and zero data regions simultaneously";
		      break;
		    case V850_OTHER_SDA | V850_OTHER_TDA:
		      msg = "cannot be in both small and tiny data regions simultaneously";
		      break;
		    case V850_OTHER_ZDA | V850_OTHER_TDA:
		      msg = "cannot be in both zero and tiny data regions simultaneously";
		      break;
		    }

		  sprintf (buff, "Variable '%s' %s", h->root.root.string, msg );
		  info->callbacks->warning (info, buff, h->root.root.string,
					    abfd, h->root.u.def.section, 0);

		  bfd_set_error (bfd_error_bad_value);
		  h->other |= V850_OTHER_ERROR;
		  ret = false;
		}
	    }

	  if (h && h->root.type == bfd_link_hash_common
	      && h->root.u.c.p
	      && !strcmp (bfd_get_section_name (abfd, h->root.u.c.p->section), "COMMON"))
	    {
	      asection *section = h->root.u.c.p->section = bfd_make_section_old_way (abfd, common);
	      section->flags |= SEC_IS_COMMON;
	    }

#ifdef DEBUG
	  fprintf (stderr, "v850_elf_check_relocs, found %s relocation for %s%s\n",
		   v850_elf_howto_table[ (int)r_type ].name,
		   (h && h->root.root.string) ? h->root.root.string : "<unknown>",
		   (h->root.type == bfd_link_hash_common) ? ", symbol is common" : "");
#endif
	  break;
	}
    }

  return ret;
}

static bfd_reloc_status_type
v850_elf_store_addend_in_insn (abfd, r_type, addend, address, replace)
     bfd *      abfd;
     int        r_type;
     long       addend;
     bfd_byte * address;
     boolean    replace;
{
  static long       last_hi16s_addend;
  static bfd_byte * last_hi16s_address;
  unsigned long insn;
  
  switch (r_type)
    {
    default:
      /* fprintf (stderr, "reloc type %d not SUPPORTED\n", r_type ); */
      return bfd_reloc_notsupported;
      
    case R_V850_32:
      if (! replace)
	addend += bfd_get_32 (abfd, address);

      bfd_put_32 (abfd, addend, address);
      return bfd_reloc_ok;
      
    case R_V850_22_PCREL:
      if (addend > 0x1fffff || addend < -0x200000)
	return bfd_reloc_overflow;
      
      if ((addend % 2) != 0)
	return bfd_reloc_dangerous;
      
      insn  = bfd_get_32 (abfd, address);
      insn &= ~0xfffe003f;
      insn |= (((addend & 0xfffe) << 16) | ((addend & 0x3f0000) >> 16));
      bfd_put_32 (abfd, insn, address);
      return bfd_reloc_ok;
      
    case R_V850_9_PCREL:
      if (addend > 0xff || addend < -0x100)
	return bfd_reloc_overflow;
      
      if ((addend % 2) != 0)
	return bfd_reloc_dangerous;
      
      insn  = bfd_get_16 (abfd, address);
      insn &= ~ 0xf870;
      insn |= ((addend & 0x1f0) << 7) | ((addend & 0x0e) << 3);
      break;
      
    case R_V850_HI16_S:
      last_hi16s_addend = addend;
      last_hi16s_address = address;
      
      addend += (bfd_get_16 (abfd, address) << 16);
      addend = (addend >> 16) + ((addend & 0x8000) != 0);
      /* This relocation cannot overflow. */
      if (addend > 0x7fff || addend < -0x8000)
	addend = 0;
      insn = addend;
      break;
      
    case R_V850_HI16:
      addend += (bfd_get_16 (abfd, address) << 16);
      addend = (addend >> 16);
      insn = addend;
      break;
      
    case R_V850_LO16:
      /* Calculate the sum of the value stored in the instruction and the
	 addend and check for overflow from the low 16 bits into the high
	 16 bits.  This can occur if the computation sets the 16th bit when
	 before it was clear, since the 16th bit will be sign extended into
	 the high part, thus reducing its value by one, but since the 16th bit
	 was originally clear, the previous R_V850_HI16_S relocation will not
	 have added in an additional 1 to the high part to compensate for this
	 effect.  Overflow can also occur if the compuation carries into the
	 17th bit and it also results in the 16th bit having the same value as
	 the 16th bit of the original value.   What happens is that the
	 R_V850_HI16_S relocation will have already examined the 16th bit of
	 the original value and added 1 to the high part if the bit is set.
	 This compensates for the sign extension of 16th bit of the result of
	 the computation.  But now there is a carry into the 17th bit, and this
	 has not been allowed for.  Note - there is no need to change anything
	 if a carry occurs, and the 16th bit changes its value, (this can only
	 happen if the bit was set in the original value, but is clear in the
	 result of the computation), as the R_V850_HI16_S relocation will have
	 already added in 1 to the high part for us.  Here are some examples:

	 original value = 0x12345
	 addend         = 0x01234
	                  -------
			  0x13579  => R_V850_HI16_S stores 0x0001
			              R_V850_LO16   stores 0x3579
				                    
				      This is OK.

	 original value = 0x12345
	 addend         = 0x07000
	                  -------
			  0x19345  => R_V850_HI16_S stores 0x0001
			              R_V850_LO16   stores 0x9345

				      but the 0x9345 value gets sign
				      extended, so the sum becomes:

				      0x00010000
				      0xffff9345
				      ----------
				      0x00009345  which is wrong.

				      This is the first example of overflow.

	  original value = 0x18888
	  addend         = 0x08888
	                   -------
			   0x21110 => R_V850_HI16_S stores 0x0002 (because 16th bit of the original value is set)
			              R_V850_LO16   stores 0x1110

				      and the sum is now:

				      0x00020000
				      0x00001110
				      ----------
				      0x00021110 which is OK.

	  original value = 0x1ffff
	  addend         = 0x08888
	                   -------
			   0x28887 => R_V850_HI16_S stores 0x0002
			              R_V850_LO16   stores 0x8887

				      and the sum is now:

				      0x00020000
				      0xffff8887
				      ----------
				      0x00018887 which is wrong.

				      This is the second example of overflow.
				      (The 16th bit remains set).

	   original value = 0x15555
	   addend         = 0x0ffff
	                    -------
			    0x25554 => R_V850_HI16_S stores 0x0001
			               R_V850_LO16   stores 0x5554

				       the sum is now:

				       0x00010000
				       0x00005554
				       ----------
				       0x00015554 which is wrong.

				       This is the other form of the second
				       example of overflow.  (The 16th bit
				       remains clear)
	 */

      {
	long result;
	
	insn   = bfd_get_16 (abfd, address);
	result = insn + addend;

#define BIT16_SET(x) ((x) & 0x8000)
#define OVERFLOWS(a,i) (((a) & 0xffff) + (i) > 0xffff)
	
	if ((BIT16_SET (result) && ! BIT16_SET (addend))
	    || (OVERFLOWS (addend, insn) 
		&& (BIT16_SET (result) == BIT16_SET (addend))))
	  {
	    /* Amend the preceding HI16_S relocation, allowing for
	       an intervening instruction, which does occasionally happen.  */
	    if (   (addend  == last_hi16s_addend)
		&& (   (address == last_hi16s_address + 4)
		    || (address == last_hi16s_address + 8)))
	      {
		insn = bfd_get_16 (abfd, last_hi16s_address);
		insn += 1;
		bfd_put_16 (abfd, insn, last_hi16s_address);
	      }
	    else
	      {
		fprintf (stderr, "FAILED to find previous HI16 reloc:\n");
		fprintf (stderr, "addend = %x, last_hi16s_added = %x, address = %x, last_address = %x\n",
			 addend, last_hi16s_addend, address, last_hi16s_address);
		fprintf (stderr, "addend = %x, result = %x, insn = %x\n",
			 addend, result, insn);
		return bfd_reloc_overflow;
	      }
	  }
	
	/* Do not complain if value has top bit set, as this has been anticipated.  */
	insn = result & 0xffff;
      }
    break;

    case R_V850_8:
      if (! replace)
	addend += (char) bfd_get_8 (abfd, address);

      if (addend > 0x7f || addend < -0x80)
	return bfd_reloc_overflow;

      bfd_put_8 (abfd, addend, address);
      return bfd_reloc_ok;

      
    case R_V850_16:
      replace = false;
      /* drop through */            
    case R_V850_SDA_16_16_OFFSET:
    case R_V850_ZDA_16_16_OFFSET:
    case R_V850_TDA_16_16_OFFSET:
      if (! replace)
	addend += bfd_get_16 (abfd, address);
      
      if (addend > 0x7fff || addend < -0x8000)
	return bfd_reloc_overflow;

      insn = addend;
      break;
      
    case R_V850_SDA_15_16_OFFSET:
    case R_V850_ZDA_15_16_OFFSET:
      insn = bfd_get_16 (abfd, address);

      if (! replace)
	addend += (insn & 0xfffe);
      
      if (addend > 0x7ffe || addend < -0x8000)
	return bfd_reloc_overflow;
      
      if (addend & 1)
	return bfd_reloc_dangerous;
      
      insn = (addend & ~1) | (insn & 1);
      break;
      
    case R_V850_TDA_6_8_OFFSET:
      insn = bfd_get_16 (abfd, address);

      if (! replace)
	addend += ((insn & 0x7e) << 1);
      
      if (addend > 0xfc || addend < 0)
	return bfd_reloc_overflow;
      
      if (addend & 3)
	return bfd_reloc_dangerous;
      
      insn &= 0xff81;
      insn |= (addend >> 1);
      break;
      
    case R_V850_TDA_7_8_OFFSET:
      insn = bfd_get_16 (abfd, address);

      if (! replace)
	addend += ((insn & 0x7f) << 1);
      
      if (addend > 0xfe || addend < 0)
	return bfd_reloc_overflow;
      
      if (addend & 1)
	return bfd_reloc_dangerous;
      
      insn &= 0xff80;
      insn |= (addend >> 1);
      break;
      
    case R_V850_TDA_7_7_OFFSET:
      insn = bfd_get_16 (abfd, address);

      if (! replace)
	addend += insn & 0x7f;
	
      if (addend > 0x7f || addend < 0)
	return bfd_reloc_overflow;
      
      insn &= 0xff80;
      insn |= addend;
      break;
      
    }

  bfd_put_16 (abfd, insn, address);
  return bfd_reloc_ok;
}


/* Insert the addend into the instruction.  */
static bfd_reloc_status_type
v850_elf_reloc (abfd, reloc, symbol, data, isection, obfd, err)
     bfd *       abfd;
     arelent *   reloc;
     asymbol *   symbol;
     PTR         data;
     asection *  isection;
     bfd *       obfd;
     char **     err;
{
  long relocation;
  long insn;

  
  /* If there is an output BFD,
     and the symbol is not a section name (which is only defined at final link time),
     and either we are not putting the addend into the instruction
         or the addend is zero, so there is nothing to add into the instruction
     then just fixup the address and return.  */
  if (obfd != (bfd *) NULL
      && (symbol->flags & BSF_SECTION_SYM) == 0
      && (! reloc->howto->partial_inplace
	  || reloc->addend == 0))
    {
      reloc->address += isection->output_offset;
      return bfd_reloc_ok;
    }
#if 0  
  else if (obfd != NULL)
    {
      return bfd_reloc_continue;
    }
#endif
  
  /* Catch relocs involving undefined symbols.  */
  if (bfd_is_und_section (symbol->section)
      && (symbol->flags & BSF_WEAK) == 0
      && obfd == NULL)
    return bfd_reloc_undefined;

  /* We handle final linking of some relocs ourselves.  */

  /* Is the address of the relocation really within the section?  */
  if (reloc->address > isection->_cooked_size)
    return bfd_reloc_outofrange;
  
  /* Work out which section the relocation is targetted at and the
     initial relocation command value.  */
  
  /* Get symbol value.  (Common symbols are special.)  */
  if (bfd_is_com_section (symbol->section))
    relocation = 0;
  else
    relocation = symbol->value;
  
  /* Convert input-section-relative symbol value to absolute + addend.  */
  relocation += symbol->section->output_section->vma;
  relocation += symbol->section->output_offset;
  relocation += reloc->addend;
  
  if (reloc->howto->pc_relative == true)
    {
      /* Here the variable relocation holds the final address of the
	 symbol we are relocating against, plus any addend.  */
      relocation -= isection->output_section->vma + isection->output_offset;
      
      /* Deal with pcrel_offset */
      relocation -= reloc->address;
    }

  /* I've got no clue... */
  reloc->addend = 0;	

  return v850_elf_store_addend_in_insn (abfd, reloc->howto->type, relocation,
					(bfd_byte *) data + reloc->address, true);
}


/*ARGSUSED*/
static boolean
v850_elf_is_local_label_name (abfd, name)
     bfd *         abfd;
     const char *  name;
{
  return (   (name[0] == '.' && (name[1] == 'L' || name[1] == '.'))
	  || (name[0] == '_' &&  name[1] == '.' && name[2] == 'L' && name[3] == '_'));
}


/* Perform a relocation as part of a final link.  */
static bfd_reloc_status_type
v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
				    input_section, contents, offset, value,
				    addend, info, sym_sec, is_local)
     reloc_howto_type *      howto;
     bfd *                   input_bfd;
     bfd *                   output_bfd;
     asection *              input_section;
     bfd_byte *              contents;
     bfd_vma                 offset;
     bfd_vma                 value;
     bfd_vma                 addend;
     struct bfd_link_info *  info;
     asection *              sym_sec;
     int                     is_local;
{
  unsigned long  r_type   = howto->type;
  bfd_byte *     hit_data = contents + offset;

  /* Adjust the value according to the relocation.  */
  switch (r_type)
    {
    case R_V850_9_PCREL:
      value -= (input_section->output_section->vma
		+ input_section->output_offset);
      value -= offset;
      break;
    
    case R_V850_22_PCREL:
      value -= (input_section->output_section->vma
		+ input_section->output_offset
		+ offset);

      value = SEXT24 (value);  /* Only the bottom 24 bits of the PC are valid */
      break;
      
    case R_V850_HI16_S:
    case R_V850_HI16:
    case R_V850_LO16:
    case R_V850_16:
    case R_V850_32:
    case R_V850_8:
      break;

    case R_V850_ZDA_15_16_OFFSET:	
    case R_V850_ZDA_16_16_OFFSET:
      if (sym_sec == NULL)
	return bfd_reloc_undefined;
	  
      value -= sym_sec->output_section->vma;
      break;

    case R_V850_SDA_15_16_OFFSET:
    case R_V850_SDA_16_16_OFFSET:
      {
	unsigned long                gp;
	struct bfd_link_hash_entry * h;

	if (sym_sec == NULL)
	  return bfd_reloc_undefined;
	  
	/* Get the value of __gp.  */
	h = bfd_link_hash_lookup (info->hash, "__gp", false, false, true);
	if (h == (struct bfd_link_hash_entry *) NULL
	    || h->type != bfd_link_hash_defined)
	  return bfd_reloc_other;

	gp = (h->u.def.value
	      + h->u.def.section->output_section->vma
	      + h->u.def.section->output_offset);

	value -= sym_sec->output_section->vma;
	value -= (gp - sym_sec->output_section->vma);
      }
    break;

    case R_V850_TDA_16_16_OFFSET:
    case R_V850_TDA_7_7_OFFSET:
    case R_V850_TDA_7_8_OFFSET:
    case R_V850_TDA_6_8_OFFSET:
      {
	unsigned long                ep;
	struct bfd_link_hash_entry * h;
	
	/* Get the value of __ep.  */
	h = bfd_link_hash_lookup (info->hash, "__ep", false, false, true);
	if (h == (struct bfd_link_hash_entry *) NULL
	    || h->type != bfd_link_hash_defined)
	  return bfd_reloc_continue;  /* Actually this indicates that __ep could not be found. */

	ep = (h->u.def.value
	      + h->u.def.section->output_section->vma
	      + h->u.def.section->output_offset);

	value -= ep;
      }
    break;
    
      
    case R_V850_NONE:
      return bfd_reloc_ok;

    default:
      return bfd_reloc_notsupported;
    }

  /* Perform the relocation.  */
  return v850_elf_store_addend_in_insn (input_bfd, r_type, value, hit_data, false);
}


/* Relocate an V850 ELF section.  */
static boolean
v850_elf_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;
{
  Elf_Internal_Shdr *           symtab_hdr;
  struct elf_link_hash_entry ** sym_hashes;
  Elf_Internal_Rela *           rel;
  Elf_Internal_Rela *           relend;

  symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (input_bfd);

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

      r_symndx = ELF32_R_SYM (rel->r_info);
      r_type   = ELF32_R_TYPE (rel->r_info);
      howto    = v850_elf_howto_table + r_type;

      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];
#ifdef USE_REL
		  /* The Elf_Internal_Rel structure does not have space for the
		     modified addend value, so we store it in the instruction
		     instead. */

		  if (sec->output_offset + sym->st_value != 0)
		    {
		      if (v850_elf_store_addend_in_insn (input_bfd, r_type,
							 sec->output_offset +
							 sym->st_value,
							 contents + rel->r_offset,
							 false)
			  != bfd_reloc_ok)
			{
			  info->callbacks->warning
			    (info,
			     "Unable to handle relocation during incremental link",
			     NULL, input_bfd, input_section, rel->r_offset);
			}
		    }
#else
		  rel->r_addend += sec->output_offset + sym->st_value;
#endif
		}
	    }

	  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);
#if 0
	  {
	    char * name;
	    name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, sym->st_name);
	    name = (name == NULL) ? "<none>" : name;
fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
	 sec->name, name, sym->st_name,
	 sec->output_section->vma, sec->output_offset, sym->st_value, rel->r_addend);
	  }
#endif
	}
      else
	{
	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	  
	  while (h->root.type == bfd_link_hash_indirect
		 || h->root.type == bfd_link_hash_warning)
	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
	  
	  if (h->root.type == bfd_link_hash_defined
	      || h->root.type == bfd_link_hash_defweak)
	    {
	      sec = h->root.u.def.section;
	      relocation = (h->root.u.def.value
			    + sec->output_section->vma
			    + sec->output_offset);
#if 0
fprintf (stderr, "defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
	 sec->name, h->root.root.string, h->root.u.def.value, sec->output_section->vma, sec->output_offset, relocation);
#endif
	    }
	  else if (h->root.type == bfd_link_hash_undefweak)
	    {
#if 0
fprintf (stderr, "undefined: sec: %s, name: %s\n",
	 sec->name, h->root.root.string);
#endif
	      relocation = 0;
	    }
	  else
	    {
	      if (! ((*info->callbacks->undefined_symbol)
		     (info, h->root.root.string, input_bfd,
		      input_section, rel->r_offset)))
		return false;
#if 0
fprintf (stderr, "unknown: name: %s\n", h->root.root.string);
#endif
	      relocation = 0;
	    }
	}

      /* FIXME: We should use the addend, but the COFF relocations
         don't.  */
      r = v850_elf_final_link_relocate (howto, input_bfd, output_bfd,
					input_section,
					contents, rel->r_offset,
					relocation, rel->r_addend,
					info, sec, h == NULL);

      if (r != bfd_reloc_ok)
	{
	  const char * name;
	  const char * msg = (const char *)0;

	  if (h != NULL)
	    name = h->root.root.string;
	  else
	    {
	      name = (bfd_elf_string_from_elf_section
		      (input_bfd, symtab_hdr->sh_link, sym->st_name));
	      if (name == NULL || *name == '\0')
		name = bfd_section_name (input_bfd, sec);
	    }

	  switch (r)
	    {
	    case bfd_reloc_overflow:
	      if (! ((*info->callbacks->reloc_overflow)
		     (info, name, howto->name, (bfd_vma) 0,
		      input_bfd, input_section, rel->r_offset)))
		return false;
	      break;

	    case bfd_reloc_undefined:
	      if (! ((*info->callbacks->undefined_symbol)
		     (info, name, input_bfd, input_section,
		      rel->r_offset)))
		return false;
	      break;

	    case bfd_reloc_outofrange:
	      msg = "internal error: out of range error";
	      goto common_error;

	    case bfd_reloc_notsupported:
	      msg = "internal error: unsupported relocation error";
	      goto common_error;

	    case bfd_reloc_dangerous:
	      msg = "internal error: dangerous relocation";
	      goto common_error;

	    case bfd_reloc_other:
	      msg = "could not locate special linker symbol __gp";
	      goto common_error;

	    case bfd_reloc_continue:
	      msg = "could not locate special linker symbol __ep";
	      goto common_error;

	    case (bfd_reloc_dangerous + 1):
	      msg = "could not locate special linker symbol __ctbp";
	      goto common_error;
	      
	    default:
	      msg = "internal error: unknown error";
	      /* fall through */

	    common_error:
	      if (!((*info->callbacks->warning)
		    (info, msg, name, input_bfd, input_section,
		     rel->r_offset)))
		return false;
	      break;
	    }
	}
    }

  return true;
}

/* Set the right machine number.  */
static boolean
v850_elf_object_p (abfd)
     bfd *abfd;
{
  switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
    {
    default:
    case E_V850_ARCH:   (void) bfd_default_set_arch_mach (abfd, bfd_arch_v850, 0); break;
    }
}

/* Store the machine number in the flags field.  */
void
v850_elf_final_write_processing (abfd, linker)
     bfd *   abfd;
     boolean linker;
{
  unsigned long val;

  switch (bfd_get_mach (abfd))
    {
    default:
    case 0: val = E_V850_ARCH; break;
    }

  elf_elfheader (abfd)->e_flags &=~ EF_V850_ARCH;
  elf_elfheader (abfd)->e_flags |= val;
}

/* Function to keep V850 specific file flags. */
boolean
v850_elf_set_private_flags (abfd, flags)
     bfd *    abfd;
     flagword flags;
{
  BFD_ASSERT (!elf_flags_init (abfd)
	      || elf_elfheader (abfd)->e_flags == flags);

  elf_elfheader (abfd)->e_flags = flags;
  elf_flags_init (abfd) = true;
  return true;
}

/* Copy backend specific data from one object module to another */
boolean
v850_elf_copy_private_bfd_data (ibfd, obfd)
     bfd * ibfd;
     bfd * obfd;
{
  if (   bfd_get_flavour (ibfd) != bfd_target_elf_flavour
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
    return true;

  BFD_ASSERT (!elf_flags_init (obfd)
	      || (elf_elfheader (obfd)->e_flags
		  == elf_elfheader (ibfd)->e_flags));

  elf_gp (obfd) = elf_gp (ibfd);
  elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
  elf_flags_init (obfd) = true;
  return true;
}

/* Merge backend specific data from an object file to the output
   object file when linking.  */
boolean
v850_elf_merge_private_bfd_data (ibfd, obfd)
     bfd * ibfd;
     bfd * obfd;
{
  flagword old_flags;
  flagword new_flags;

  if (   bfd_get_flavour (ibfd) != bfd_target_elf_flavour
      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
    return true;

  new_flags = elf_elfheader (ibfd)->e_flags;
  old_flags = elf_elfheader (obfd)->e_flags;

  if (! elf_flags_init (obfd))
    {
      elf_flags_init (obfd) = true;
      elf_elfheader (obfd)->e_flags = new_flags;

      if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
	  && bfd_get_arch_info (obfd)->the_default)
	{
	  return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
	}

      return true;
    }

  /* Check flag compatibility.  */

  if (new_flags == old_flags)
    return true;

  if ((new_flags & EF_V850_ARCH) != (old_flags & EF_V850_ARCH))
    {
      _bfd_error_handler ("%s: Architecture mismatch with previous modules",
	     bfd_get_filename (ibfd));
#if 0
      bfd_set_error (bfd_error_bad_value);
      return false;
#else
      return true;
#endif
    }

  return true;
}
/* Display the flags field */

static boolean
v850_elf_print_private_bfd_data (abfd, ptr)
     bfd *   abfd;
     PTR     ptr;
{
  FILE * file = (FILE *) ptr;
  
  BFD_ASSERT (abfd != NULL && ptr != NULL)
  
  fprintf (file, "private flags = %x", elf_elfheader (abfd)->e_flags);
  
  switch (elf_elfheader (abfd)->e_flags & EF_V850_ARCH)
    {
    default:
    case E_V850_ARCH: fprintf (file, ": v850 architecture"); break;
    }
  
  fputc ('\n', file);
  
  return true;
}

/* V850 ELF uses four common sections.  One is the usual one, and the
   others are for (small) objects in one of the special data areas:
   small, tiny and zero.  All the objects are kept together, and then
   referenced via the gp register, the ep register or the r0 register
   respectively, which yields smaller, faster assembler code.  This
   approach is copied from elf32-mips.c.  */

static asection  v850_elf_scom_section;
static asymbol   v850_elf_scom_symbol;
static asymbol * v850_elf_scom_symbol_ptr;
static asection  v850_elf_tcom_section;
static asymbol   v850_elf_tcom_symbol;
static asymbol * v850_elf_tcom_symbol_ptr;
static asection  v850_elf_zcom_section;
static asymbol   v850_elf_zcom_symbol;
static asymbol * v850_elf_zcom_symbol_ptr;


/* Given a BFD section, try to locate the corresponding ELF section
   index.  */

static boolean
v850_elf_section_from_bfd_section (abfd, hdr, sec, retval)
     bfd *                 abfd;
     Elf32_Internal_Shdr * hdr;
     asection *            sec;
     int *                 retval;
{
  if (strcmp (bfd_get_section_name (abfd, sec), ".scommon") == 0)
    {
      *retval = SHN_V850_SCOMMON;
      return true;
    }
  if (strcmp (bfd_get_section_name (abfd, sec), ".tcommon") == 0)
    {
      *retval = SHN_V850_TCOMMON;
      return true;
    }
  if (strcmp (bfd_get_section_name (abfd, sec), ".zcommon") == 0)
    {
      *retval = SHN_V850_ZCOMMON;
      return true;
    }
  return false;
}

/* Handle the special V850 section numbers that a symbol may use.  */

static void
v850_elf_symbol_processing (abfd, asym)
     bfd *     abfd;
     asymbol * asym;
{
  elf_symbol_type * elfsym = (elf_symbol_type *) asym;

  switch (elfsym->internal_elf_sym.st_shndx)
    {
    case SHN_V850_SCOMMON:
      if (v850_elf_scom_section.name == NULL)
	{
	  /* Initialize the small common section.  */
	  v850_elf_scom_section.name           = ".scommon";
	  v850_elf_scom_section.flags          = SEC_IS_COMMON | SEC_ALLOC | SEC_DATA;
	  v850_elf_scom_section.output_section = & v850_elf_scom_section;
	  v850_elf_scom_section.symbol         = & v850_elf_scom_symbol;
	  v850_elf_scom_section.symbol_ptr_ptr = & v850_elf_scom_symbol_ptr;
	  v850_elf_scom_symbol.name            = ".scommon";
	  v850_elf_scom_symbol.flags           = BSF_SECTION_SYM;
	  v850_elf_scom_symbol.section         = & v850_elf_scom_section;
	  v850_elf_scom_symbol_ptr             = & v850_elf_scom_symbol;
	}
      asym->section = & v850_elf_scom_section;
      asym->value = elfsym->internal_elf_sym.st_size;
      break;
      
    case SHN_V850_TCOMMON:
      if (v850_elf_tcom_section.name == NULL)
	{
	  /* Initialize the tcommon section.  */
	  v850_elf_tcom_section.name           = ".tcommon";
	  v850_elf_tcom_section.flags          = SEC_IS_COMMON;
	  v850_elf_tcom_section.output_section = & v850_elf_tcom_section;
	  v850_elf_tcom_section.symbol         = & v850_elf_tcom_symbol;
	  v850_elf_tcom_section.symbol_ptr_ptr = & v850_elf_tcom_symbol_ptr;
	  v850_elf_tcom_symbol.name            = ".tcommon";
	  v850_elf_tcom_symbol.flags           = BSF_SECTION_SYM;
	  v850_elf_tcom_symbol.section         = & v850_elf_tcom_section;
	  v850_elf_tcom_symbol_ptr             = & v850_elf_tcom_symbol;
	}
      asym->section = & v850_elf_tcom_section;
      asym->value = elfsym->internal_elf_sym.st_size;
      break;

    case SHN_V850_ZCOMMON:
      if (v850_elf_zcom_section.name == NULL)
	{
	  /* Initialize the zcommon section.  */
	  v850_elf_zcom_section.name           = ".zcommon";
	  v850_elf_zcom_section.flags          = SEC_IS_COMMON;
	  v850_elf_zcom_section.output_section = & v850_elf_zcom_section;
	  v850_elf_zcom_section.symbol         = & v850_elf_zcom_symbol;
	  v850_elf_zcom_section.symbol_ptr_ptr = & v850_elf_zcom_symbol_ptr;
	  v850_elf_zcom_symbol.name            = ".zcommon";
	  v850_elf_zcom_symbol.flags           = BSF_SECTION_SYM;
	  v850_elf_zcom_symbol.section         = & v850_elf_zcom_section;
	  v850_elf_zcom_symbol_ptr             = & v850_elf_zcom_symbol;
	}
      asym->section = & v850_elf_zcom_section;
      asym->value = elfsym->internal_elf_sym.st_size;
      break;
    }
}

/* Hook called by the linker routine which adds symbols from an object
   file.  We must handle the special MIPS section numbers here.  */

/*ARGSUSED*/
static boolean
v850_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
     bfd *                    abfd;
     struct bfd_link_info *   info;
     const Elf_Internal_Sym * sym;
     const char **            namep;
     flagword *               flagsp;
     asection **              secp;
     bfd_vma *                valp;
{
  switch (sym->st_shndx)
    {
    case SHN_V850_SCOMMON:
      *secp = bfd_make_section_old_way (abfd, ".scommon");
      (*secp)->flags |= SEC_IS_COMMON;
      *valp = sym->st_size;
      break;
      
    case SHN_V850_TCOMMON:
      *secp = bfd_make_section_old_way (abfd, ".tcommon");
      (*secp)->flags |= SEC_IS_COMMON;
      *valp = sym->st_size;
      break;
      
    case SHN_V850_ZCOMMON:
      *secp = bfd_make_section_old_way (abfd, ".zcommon");
      (*secp)->flags |= SEC_IS_COMMON;
      *valp = sym->st_size;
      break;
    }

  return true;
}

/*ARGSIGNORED*/
static boolean
v850_elf_link_output_symbol_hook (abfd, info, name, sym, input_sec)
     bfd *                  abfd;
     struct bfd_link_info * info;
     const char *           name;
     Elf_Internal_Sym *     sym;
     asection *             input_sec;
{
  /* If we see a common symbol, which implies a relocatable link, then
     if a symbol was in a special common section in an input file, mark
     it as a special common in the output file.  */
  
  if (sym->st_shndx == SHN_COMMON)
    {
      if (strcmp (input_sec->name, ".scommon") == 0)
	sym->st_shndx = SHN_V850_SCOMMON;
      else if (strcmp (input_sec->name, ".tcommon") == 0)
	sym->st_shndx = SHN_V850_TCOMMON;
      else if (strcmp (input_sec->name, ".zcommon") == 0)
	sym->st_shndx = SHN_V850_ZCOMMON;
    }

  return true;
}

static boolean
v850_elf_section_from_shdr (abfd, hdr, name)
     bfd *               abfd;
     Elf_Internal_Shdr * hdr;
     char *              name;
{
  /* There ought to be a place to keep ELF backend specific flags, but
     at the moment there isn't one.  We just keep track of the
     sections by their name, instead.  */

  if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
    return false;

  switch (hdr->sh_type)
    {
    case SHT_V850_SCOMMON:
    case SHT_V850_TCOMMON:
    case SHT_V850_ZCOMMON:
      if (! bfd_set_section_flags (abfd, hdr->bfd_section,
				   (bfd_get_section_flags (abfd,
							   hdr->bfd_section)
				    | SEC_IS_COMMON)))
	return false;
    }

  return true;
}

/* Set the correct type for a V850 ELF section.  We do this by the
   section name, which is a hack, but ought to work.  */
static boolean
v850_elf_fake_sections (abfd, hdr, sec)
     bfd *                 abfd;
     Elf32_Internal_Shdr * hdr;
     asection *            sec;
{
  register const char * name;

  name = bfd_get_section_name (abfd, sec);

  if (strcmp (name, ".scommon") == 0)
    {
      hdr->sh_type = SHT_V850_SCOMMON;
    }
  else if (strcmp (name, ".tcommon") == 0)
    {
      hdr->sh_type = SHT_V850_TCOMMON;
    }
  else if (strcmp (name, ".zcommon") == 0)
    hdr->sh_type = SHT_V850_ZCOMMON;
  
  return true;
}



#define TARGET_LITTLE_SYM			bfd_elf32_v850_vec
#define TARGET_LITTLE_NAME			"elf32-v850"
#define ELF_ARCH				bfd_arch_v850
#define ELF_MACHINE_CODE			EM_CYGNUS_V850
#define ELF_MAXPAGESIZE				0x1000
	
#define elf_info_to_howto			0
#define elf_info_to_howto_rel			v850_elf_info_to_howto_rel

#define elf_backend_check_relocs		v850_elf_check_relocs
#define elf_backend_relocate_section    	v850_elf_relocate_section
#define elf_backend_object_p			v850_elf_object_p
#define elf_backend_final_write_processing 	v850_elf_final_write_processing
#define elf_backend_section_from_bfd_section 	v850_elf_section_from_bfd_section
#define elf_backend_symbol_processing		v850_elf_symbol_processing
#define elf_backend_add_symbol_hook		v850_elf_add_symbol_hook
#define elf_backend_link_output_symbol_hook 	v850_elf_link_output_symbol_hook
#define elf_backend_section_from_shdr		v850_elf_section_from_shdr
#define elf_backend_fake_sections		v850_elf_fake_sections

#define bfd_elf32_bfd_is_local_label_name	v850_elf_is_local_label_name
#define bfd_elf32_bfd_reloc_type_lookup		v850_elf_reloc_type_lookup
#define bfd_elf32_bfd_copy_private_bfd_data 	v850_elf_copy_private_bfd_data
#define bfd_elf32_bfd_merge_private_bfd_data 	v850_elf_merge_private_bfd_data
#define bfd_elf32_bfd_set_private_flags		v850_elf_set_private_flags
#define bfd_elf32_bfd_print_private_bfd_data	v850_elf_print_private_bfd_data

#define elf_symbol_leading_char			'_'

#include "elf32-target.h"
