[deliverable/binutils-gdb.git] / bfd / elf32-d10v.c

/* D10V-specific support for 32-bit ELF
   Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   2007 Free Software Foundation, Inc.
   Contributed by Martin Hunt (hunt@cygnus.com).

   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., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/d10v.h"

/* Use REL instead of RELA to save space.  */
#define USE_REL	1

static reloc_howto_type elf_d10v_howto_table[] =
{
  /* This reloc does nothing.  */
  HOWTO (R_D10V_NONE,		/* Type.  */
	 0,			/* Rightshift.  */
	 2,			/* Size (0 = byte, 1 = short, 2 = long).  */
	 32,			/* Bitsize.  */
	 FALSE,			/* PC_relative.  */
	 0,			/* Bitpos.  */
	 complain_overflow_dont,/* Complain_on_overflow.  */
	 bfd_elf_generic_reloc, /* Special_function.  */
	 "R_D10V_NONE",		/* Name.  */
	 FALSE,			/* Partial_inplace.  */
	 0,			/* Src_mask.  */
	 0,			/* Dst_mask.  */
	 FALSE),		/* PCrel_offset.  */

  /* An PC Relative 10-bit relocation, shifted by 2, right container.  */
  HOWTO (R_D10V_10_PCREL_R,	/* Type.  */
	 2,	                /* Rightshift.  */
	 2,	                /* Size (0 = byte, 1 = short, 2 = long).  */
	 8,	                /* Bitsize.  */
	 TRUE,	        	/* PC_relative.  */
	 0,	                /* Bitpos.  */
	 complain_overflow_signed, /* Complain_on_overflow.  */
	 bfd_elf_generic_reloc, /* Special_function.  */
	 "R_D10V_10_PCREL_R",	/* Name.  */
	 FALSE,	        	/* Partial_inplace.  */
	 0xff,			/* Src_mask.  */
	 0xff,   		/* Dst_mask.  */
	 TRUE),			/* PCrel_offset.  */

  /* An PC Relative 10-bit relocation, shifted by 2, left container.  */
  HOWTO (R_D10V_10_PCREL_L,	/* Type.  */
	 2,	                /* Rightshift.  */
	 2,	                /* Size (0 = byte, 1 = short, 2 = long).  */
	 8,	                /* Bitsize.  */
	 TRUE,	        	/* PC_relative.  */
	 15,	                /* Bitpos.  */
	 complain_overflow_signed, /* Complain_on_overflow.  */
	 bfd_elf_generic_reloc, /* Special_function.  */
	 "R_D10V_10_PCREL_L",	/* Name.  */
	 FALSE,	        	/* Partial_inplace.  */
	 0x07f8000,		/* Src_mask.  */
	 0x07f8000,   		/* Dst_mask.  */
	 TRUE),			/* PCrel_offset.  */

  /* A 16 bit absolute relocation.  */
  HOWTO (R_D10V_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_D10V_16",		/* Name.  */
	 FALSE,			/* Partial_inplace.  */
	 0xffff,		/* Src_mask.  */
	 0xffff,		/* Dst_mask.  */
	 FALSE),		/* PCrel_offset.  */

  /* An 18 bit absolute relocation, right shifted 2.  */
  HOWTO (R_D10V_18,		/* Type.  */
	 2,			/* 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_D10V_18",		/* Name.  */
	 FALSE,			/* Partial_inplace.  */
	 0xffff,		/* Src_mask.  */
	 0xffff,		/* Dst_mask.  */
	 FALSE),		/* PCrel_offset.  */

  /* A relative 18 bit relocation, right shifted by 2.  */
  HOWTO (R_D10V_18_PCREL,	/* Type.  */
	 2,			/* Rightshift.  */
	 2,			/* Size (0 = byte, 1 = short, 2 = long).  */
	 16,			/* Bitsize.  */
	 TRUE,			/* PC_relative.  */
	 0,			/* Bitpos.  */
	 complain_overflow_signed, /* Complain_on_overflow.  */
	 bfd_elf_generic_reloc, /* Special_function.  */
	 "R_D10V_18_PCREL",	/* Name.  */
	 FALSE,			/* Partial_inplace.  */
	 0xffff,		/* Src_mask.  */
	 0xffff,		/* Dst_mask.  */
	 TRUE),			/* PCrel_offset.  */

  /* A 32 bit absolute relocation.  */
  HOWTO (R_D10V_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.  */
	 bfd_elf_generic_reloc, /* Special_function.  */
	 "R_D10V_32",		/* Name.  */
	 FALSE,			/* Partial_inplace.  */
	 0xffffffff,		/* Src_mask.  */
	 0xffffffff,		/* Dst_mask.  */
	 FALSE),		/* PCrel_offset.  */

  /* GNU extension to record C++ vtable hierarchy.  */
  HOWTO (R_D10V_GNU_VTINHERIT,	/* Type.  */
	 0,                     /* Rightshift.  */
	 2,                     /* Size (0 = byte, 1 = short, 2 = long).  */
	 0,                     /* Bitsize.  */
	 FALSE,                 /* PC_relative.  */
	 0,                     /* Bitpos.  */
	 complain_overflow_dont,/* Complain_on_overflow.  */
	 NULL,                  /* Special_function.  */
	 "R_D10V_GNU_VTINHERIT",/* Name.  */
	 FALSE,                 /* Partial_inplace.  */
	 0,                     /* Src_mask.  */
	 0,                     /* Dst_mask.  */
	 FALSE),                /* PCrel_offset.  */

  /* GNU extension to record C++ vtable member usage.  */
  HOWTO (R_D10V_GNU_VTENTRY,    /* Type.  */
	 0,                     /* Rightshift.  */
	 2,                     /* Size (0 = byte, 1 = short, 2 = long).  */
	 0,                     /* Bitsize.  */
	 FALSE,                 /* PC_relative.  */
	 0,                     /* Bitpos.  */
	 complain_overflow_dont,/* Complain_on_overflow.  */
	 _bfd_elf_rel_vtable_reloc_fn,  /* Special_function.  */
	 "R_D10V_GNU_VTENTRY",  /* Name.  */
	 FALSE,                 /* Partial_inplace.  */
	 0,                     /* Src_mask.  */
	 0,                     /* Dst_mask.  */
	 FALSE),                /* PCrel_offset.  */
};

/* Map BFD reloc types to D10V ELF reloc types.  */

struct d10v_reloc_map
{
  bfd_reloc_code_real_type bfd_reloc_val;
  unsigned char elf_reloc_val;
};

static const struct d10v_reloc_map d10v_reloc_map[] =
{
  { BFD_RELOC_NONE, R_D10V_NONE, },
  { BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R },
  { BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L },
  { BFD_RELOC_16, R_D10V_16 },
  { BFD_RELOC_D10V_18, R_D10V_18 },
  { BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL },
  { BFD_RELOC_32, R_D10V_32 },
  { BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT },
  { BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY },
};

static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
				 bfd_reloc_code_real_type code)
{
  unsigned int i;

  for (i = 0;
       i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map);
       i++)
    if (d10v_reloc_map[i].bfd_reloc_val == code)
      return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val];

  return NULL;
}

static reloc_howto_type *
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
				 const char *r_name)
{
  unsigned int i;

  for (i = 0;
       i < sizeof (elf_d10v_howto_table) / sizeof (elf_d10v_howto_table[0]);
       i++)
    if (elf_d10v_howto_table[i].name != NULL
	&& strcasecmp (elf_d10v_howto_table[i].name, r_name) == 0)
      return &elf_d10v_howto_table[i];

  return NULL;
}

/* Set the howto pointer for an D10V ELF reloc.  */

static void
d10v_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
			arelent *cache_ptr,
			Elf_Internal_Rela *dst)
{
  unsigned int r_type;

  r_type = ELF32_R_TYPE (dst->r_info);
  BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
  cache_ptr->howto = &elf_d10v_howto_table[r_type];
}

static asection *
elf32_d10v_gc_mark_hook (asection *sec,
			 struct bfd_link_info *info,
			 Elf_Internal_Rela *rel,
			 struct elf_link_hash_entry *h,
			 Elf_Internal_Sym *sym)
{
  if (h != NULL)
    switch (ELF32_R_TYPE (rel->r_info))
      {
      case R_D10V_GNU_VTINHERIT:
      case R_D10V_GNU_VTENTRY:
	return NULL;
      }

  return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
}

/* Look through the relocs for a section during the first phase.
   Since we don't do .gots or .plts, we just need to consider the
   virtual table relocs for gc.  */

static bfd_boolean
elf32_d10v_check_relocs (bfd *abfd,
			 struct bfd_link_info *info,
			 asection *sec,
			 const Elf_Internal_Rela *relocs)
{
  Elf_Internal_Shdr *symtab_hdr;
  struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
  const Elf_Internal_Rela *rel;
  const Elf_Internal_Rela *rel_end;

  if (info->relocatable)
    return TRUE;

  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (abfd);
  sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
  if (!elf_bad_symtab (abfd))
    sym_hashes_end -= symtab_hdr->sh_info;

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

      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];
	  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;
	}

      switch (ELF32_R_TYPE (rel->r_info))
        {
        /* This relocation describes the C++ object vtable hierarchy.
           Reconstruct it for later use during GC.  */
        case R_D10V_GNU_VTINHERIT:
          if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
            return FALSE;
          break;

        /* This relocation describes which C++ vtable entries are actually
           used.  Record for later use during GC.  */
        case R_D10V_GNU_VTENTRY:
          if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
            return FALSE;
          break;
        }
    }

  return TRUE;
}

static bfd_vma
extract_rel_addend (bfd *abfd,
		    bfd_byte *where,
		    reloc_howto_type *howto)
{
  bfd_vma insn, val;

  switch (howto->size)
    {
    case 0:
      insn = bfd_get_8 (abfd, where);
      break;
    case 1:
      insn = bfd_get_16 (abfd, where);
      break;
    case 2:
      insn = bfd_get_32 (abfd, where);
      break;
    default:
      abort ();
    }

  val = (insn & howto->dst_mask) >> howto->bitpos << howto->rightshift;
  /* We should really be testing for signed addends here, but we don't
     have that info directly in the howto.  */
  if (howto->pc_relative)
    {
      bfd_vma sign;
      sign = howto->dst_mask & (~howto->dst_mask >> 1 | ~(-(bfd_vma) 1 >> 1));
      sign = sign >> howto->bitpos << howto->rightshift;
      val = (val ^ sign) - sign;
    }
  return val;
}

static void
insert_rel_addend (bfd *abfd,
		   bfd_byte *where,
		   reloc_howto_type *howto,
		   bfd_vma addend)
{
  bfd_vma insn;

  addend = (addend >> howto->rightshift << howto->bitpos) & howto->dst_mask;
  insn = ~howto->dst_mask;
  switch (howto->size)
    {
    case 0:
      insn &= bfd_get_8 (abfd, where);
      insn |= addend;
      bfd_put_8 (abfd, insn, where);
      break;
    case 1:
      insn &= bfd_get_16 (abfd, where);
      insn |= addend;
      bfd_put_16 (abfd, insn, where);
      break;
    case 2:
      insn &= bfd_get_32 (abfd, where);
      insn |= addend;
      bfd_put_32 (abfd, insn, where);
      break;
    default:
      abort ();
    }
}

/* Relocate a D10V ELF section.  */

static bfd_boolean
elf32_d10v_relocate_section (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, *relend;
  const char *name;

  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);

      if (r_type == R_D10V_GNU_VTENTRY
          || r_type == R_D10V_GNU_VTINHERIT)
        continue;

      howto = elf_d10v_howto_table + r_type;
      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 (ELF_ST_TYPE (sym->st_info) == STT_SECTION
	      && ((sec->flags & SEC_MERGE) != 0
		  || (info->relocatable
		      && sec->output_offset != 0)))
	    {
	      bfd_vma addend;
	      bfd_byte *where = contents + rel->r_offset;

	      addend = extract_rel_addend (input_bfd, where, howto);

	      if (info->relocatable)
		addend += sec->output_offset;
	      else
		{
		  asection *msec = sec;
		  addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
						   addend);
		  addend -= relocation;
		  addend += msec->output_section->vma + msec->output_offset;
		}
	      insert_rel_addend (input_bfd, where, howto, addend);
	    }
	}
      else
	{
	  bfd_boolean unresolved_reloc, warned;

	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
				   r_symndx, symtab_hdr, sym_hashes,
				   h, sec, relocation,
				   unresolved_reloc, warned);
	}

      if (sec != NULL && elf_discarded_section (sec))
	{
	  /* For relocs against symbols from removed linkonce sections,
	     or sections discarded by a linker script, we just want the
	     section contents zeroed.  Avoid any special processing.  */
	  _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
	  rel->r_info = 0;
	  rel->r_addend = 0;
	  continue;
	}

      if (info->relocatable)
	continue;

      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);
	}

      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
                                    contents, rel->r_offset,
                                    relocation, (bfd_vma) 0);

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

	  switch (r)
	    {
	    case bfd_reloc_overflow:
	      if (!((*info->callbacks->reloc_overflow)
		    (info, (h ? &h->root : NULL), 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, TRUE)))
		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 error");
	      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;
}
#define ELF_ARCH		bfd_arch_d10v
#define ELF_MACHINE_CODE	EM_D10V
#define ELF_MACHINE_ALT1	EM_CYGNUS_D10V
#define ELF_MAXPAGESIZE		0x1000

#define TARGET_BIG_SYM          bfd_elf32_d10v_vec
#define TARGET_BIG_NAME		"elf32-d10v"

#define elf_info_to_howto	             0
#define elf_info_to_howto_rel	             d10v_info_to_howto_rel
#define elf_backend_object_p	             0
#define elf_backend_final_write_processing   0
#define elf_backend_gc_mark_hook             elf32_d10v_gc_mark_hook
#define elf_backend_check_relocs             elf32_d10v_check_relocs
#define elf_backend_relocate_section         elf32_d10v_relocate_section
#define elf_backend_can_gc_sections          1

#include "elf32-target.h"
Commit	Line	Data
252b5132	1	/* D10V-specific support for 32-bit ELF
ab96bf03 AM	2	Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
ab96bf03 AM	3	2007 Free Software Foundation, Inc.
252b5132 RH	4	Contributed by Martin Hunt (hunt@cygnus.com).
252b5132 RH	5
47b0e7ad	6	This file is part of BFD, the Binary File Descriptor library.
252b5132	7
47b0e7ad NC	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
252b5132	12
47b0e7ad NC	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
252b5132	17
47b0e7ad NC	18	You should have received a copy of the GNU General Public License
	19	along with this program; if not, write to the Free Software
	20	Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
	21	MA 02110-1301, USA. */
252b5132 RH	22
	23	#include "bfd.h"
	24	#include "sysdep.h"
	25	#include "libbfd.h"
	26	#include "elf-bfd.h"
1b452ec6	27	#include "elf/d10v.h"
252b5132	28
917583ad	29	/* Use REL instead of RELA to save space. */
acf8aed4	30	#define USE_REL 1
252b5132	31
252b5132	32	static reloc_howto_type elf_d10v_howto_table[] =
47b0e7ad NC	33	{
	34	/* This reloc does nothing. */
	35	HOWTO (R_D10V_NONE, /* Type. */
	36	0, /* Rightshift. */
	37	2, /* Size (0 = byte, 1 = short, 2 = long). */
	38	32, /* Bitsize. */
	39	FALSE, /* PC_relative. */
	40	0, /* Bitpos. */
	41	complain_overflow_dont,/* Complain_on_overflow. */
	42	bfd_elf_generic_reloc, /* Special_function. */
	43	"R_D10V_NONE", /* Name. */
	44	FALSE, /* Partial_inplace. */
	45	0, /* Src_mask. */
	46	0, /* Dst_mask. */
	47	FALSE), /* PCrel_offset. */
	48
	49	/* An PC Relative 10-bit relocation, shifted by 2, right container. */
	50	HOWTO (R_D10V_10_PCREL_R, /* Type. */
	51	2, /* Rightshift. */
	52	2, /* Size (0 = byte, 1 = short, 2 = long). */
a7985d73	53	8, /* Bitsize. */
47b0e7ad NC	54	TRUE, /* PC_relative. */
47b0e7ad NC	55	0, /* Bitpos. */
a7985d73	56	complain_overflow_signed, /* Complain_on_overflow. */
47b0e7ad NC	57	bfd_elf_generic_reloc, /* Special_function. */
	58	"R_D10V_10_PCREL_R", /* Name. */
	59	FALSE, /* Partial_inplace. */
	60	0xff, /* Src_mask. */
	61	0xff, /* Dst_mask. */
	62	TRUE), /* PCrel_offset. */
	63
	64	/* An PC Relative 10-bit relocation, shifted by 2, left container. */
	65	HOWTO (R_D10V_10_PCREL_L, /* Type. */
	66	2, /* Rightshift. */
	67	2, /* Size (0 = byte, 1 = short, 2 = long). */
a7985d73	68	8, /* Bitsize. */
47b0e7ad NC	69	TRUE, /* PC_relative. */
47b0e7ad NC	70	15, /* Bitpos. */
a7985d73	71	complain_overflow_signed, /* Complain_on_overflow. */
47b0e7ad NC	72	bfd_elf_generic_reloc, /* Special_function. */
	73	"R_D10V_10_PCREL_L", /* Name. */
	74	FALSE, /* Partial_inplace. */
	75	0x07f8000, /* Src_mask. */
	76	0x07f8000, /* Dst_mask. */
	77	TRUE), /* PCrel_offset. */
	78
	79	/* A 16 bit absolute relocation. */
	80	HOWTO (R_D10V_16, /* Type. */
	81	0, /* Rightshift. */
	82	1, /* Size (0 = byte, 1 = short, 2 = long). */
	83	16, /* Bitsize. */
	84	FALSE, /* PC_relative. */
	85	0, /* Bitpos. */
	86	complain_overflow_dont,/* Complain_on_overflow. */
	87	bfd_elf_generic_reloc, /* Special_function. */
	88	"R_D10V_16", /* Name. */
	89	FALSE, /* Partial_inplace. */
	90	0xffff, /* Src_mask. */
	91	0xffff, /* Dst_mask. */
	92	FALSE), /* PCrel_offset. */
	93
	94	/* An 18 bit absolute relocation, right shifted 2. */
	95	HOWTO (R_D10V_18, /* Type. */
	96	2, /* Rightshift. */
	97	1, /* Size (0 = byte, 1 = short, 2 = long). */
	98	16, /* Bitsize. */
	99	FALSE, /* PC_relative. */
	100	0, /* Bitpos. */
	101	complain_overflow_dont, /* Complain_on_overflow. */
	102	bfd_elf_generic_reloc, /* Special_function. */
	103	"R_D10V_18", /* Name. */
	104	FALSE, /* Partial_inplace. */
	105	0xffff, /* Src_mask. */
	106	0xffff, /* Dst_mask. */
	107	FALSE), /* PCrel_offset. */
	108
	109	/* A relative 18 bit relocation, right shifted by 2. */
	110	HOWTO (R_D10V_18_PCREL, /* Type. */
	111	2, /* Rightshift. */
	112	2, /* Size (0 = byte, 1 = short, 2 = long). */
a7985d73	113	16, /* Bitsize. */
47b0e7ad NC	114	TRUE, /* PC_relative. */
47b0e7ad NC	115	0, /* Bitpos. */
a7985d73	116	complain_overflow_signed, /* Complain_on_overflow. */
47b0e7ad NC	117	bfd_elf_generic_reloc, /* Special_function. */
	118	"R_D10V_18_PCREL", /* Name. */
	119	FALSE, /* Partial_inplace. */
	120	0xffff, /* Src_mask. */
	121	0xffff, /* Dst_mask. */
	122	TRUE), /* PCrel_offset. */
	123
	124	/* A 32 bit absolute relocation. */
	125	HOWTO (R_D10V_32, /* Type. */
	126	0, /* Rightshift. */
	127	2, /* Size (0 = byte, 1 = short, 2 = long). */
	128	32, /* Bitsize. */
	129	FALSE, /* PC_relative. */
	130	0, /* Bitpos. */
	131	complain_overflow_dont,/* Complain_on_overflow. */
	132	bfd_elf_generic_reloc, /* Special_function. */
	133	"R_D10V_32", /* Name. */
	134	FALSE, /* Partial_inplace. */
	135	0xffffffff, /* Src_mask. */
	136	0xffffffff, /* Dst_mask. */
	137	FALSE), /* PCrel_offset. */
	138
	139	/* GNU extension to record C++ vtable hierarchy. */
	140	HOWTO (R_D10V_GNU_VTINHERIT, /* Type. */
	141	0, /* Rightshift. */
	142	2, /* Size (0 = byte, 1 = short, 2 = long). */
	143	0, /* Bitsize. */
	144	FALSE, /* PC_relative. */
	145	0, /* Bitpos. */
	146	complain_overflow_dont,/* Complain_on_overflow. */
	147	NULL, /* Special_function. */
	148	"R_D10V_GNU_VTINHERIT",/* Name. */
	149	FALSE, /* Partial_inplace. */
	150	0, /* Src_mask. */
	151	0, /* Dst_mask. */
	152	FALSE), /* PCrel_offset. */
	153
	154	/* GNU extension to record C++ vtable member usage. */
	155	HOWTO (R_D10V_GNU_VTENTRY, /* Type. */
	156	0, /* Rightshift. */
	157	2, /* Size (0 = byte, 1 = short, 2 = long). */
	158	0, /* Bitsize. */
	159	FALSE, /* PC_relative. */
	160	0, /* Bitpos. */
	161	complain_overflow_dont,/* Complain_on_overflow. */
	162	_bfd_elf_rel_vtable_reloc_fn, /* Special_function. */
	163	"R_D10V_GNU_VTENTRY", /* Name. */
	164	FALSE, /* Partial_inplace. */
	165	0, /* Src_mask. */
	166	0, /* Dst_mask. */
	167	FALSE), /* PCrel_offset. */
	168	};
252b5132 RH	169
	170	/* Map BFD reloc types to D10V ELF reloc types. */
	171
	172	struct d10v_reloc_map
47b0e7ad NC	173	{
	174	bfd_reloc_code_real_type bfd_reloc_val;
	175	unsigned char elf_reloc_val;
	176	};
917583ad NC	177
917583ad NC	178	static const struct d10v_reloc_map d10v_reloc_map[] =
47b0e7ad NC	179	{
	180	{ BFD_RELOC_NONE, R_D10V_NONE, },
	181	{ BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R },
	182	{ BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L },
	183	{ BFD_RELOC_16, R_D10V_16 },
	184	{ BFD_RELOC_D10V_18, R_D10V_18 },
	185	{ BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL },
	186	{ BFD_RELOC_32, R_D10V_32 },
	187	{ BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT },
	188	{ BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY },
	189	};
252b5132 RH	190
252b5132 RH	191	static reloc_howto_type *
47b0e7ad NC	192	bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
47b0e7ad NC	193	bfd_reloc_code_real_type code)
252b5132 RH	194	{
	195	unsigned int i;
	196
	197	for (i = 0;
	198	i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map);
	199	i++)
47b0e7ad NC	200	if (d10v_reloc_map[i].bfd_reloc_val == code)
47b0e7ad NC	201	return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val];
252b5132 RH	202
	203	return NULL;
	204	}
	205
157090f7 AM	206	static reloc_howto_type *
	207	bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	208	const char *r_name)
	209	{
	210	unsigned int i;
	211
	212	for (i = 0;
	213	i < sizeof (elf_d10v_howto_table) / sizeof (elf_d10v_howto_table[0]);
	214	i++)
	215	if (elf_d10v_howto_table[i].name != NULL
	216	&& strcasecmp (elf_d10v_howto_table[i].name, r_name) == 0)
	217	return &elf_d10v_howto_table[i];
	218
	219	return NULL;
	220	}
	221
252b5132 RH	222	/* Set the howto pointer for an D10V ELF reloc. */
	223
	224	static void
47b0e7ad NC	225	d10v_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
	226	arelent *cache_ptr,
	227	Elf_Internal_Rela *dst)
252b5132 RH	228	{
	229	unsigned int r_type;
	230
	231	r_type = ELF32_R_TYPE (dst->r_info);
	232	BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
	233	cache_ptr->howto = &elf_d10v_howto_table[r_type];
	234	}
	235
	236	static asection *
47b0e7ad	237	elf32_d10v_gc_mark_hook (asection *sec,
07adf181	238	struct bfd_link_info *info,
47b0e7ad NC	239	Elf_Internal_Rela *rel,
	240	struct elf_link_hash_entry *h,
	241	Elf_Internal_Sym *sym)
252b5132 RH	242	{
252b5132 RH	243	if (h != NULL)
07adf181	244	switch (ELF32_R_TYPE (rel->r_info))
252b5132 RH	245	{
	246	case R_D10V_GNU_VTINHERIT:
	247	case R_D10V_GNU_VTENTRY:
07adf181 AM	248	return NULL;
07adf181 AM	249	}
1e2f5b6e	250
07adf181	251	return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132 RH	252	}
	253
	254	/* Look through the relocs for a section during the first phase.
	255	Since we don't do .gots or .plts, we just need to consider the
	256	virtual table relocs for gc. */
a7c10850	257
b34976b6	258	static bfd_boolean
47b0e7ad NC	259	elf32_d10v_check_relocs (bfd *abfd,
	260	struct bfd_link_info *info,
	261	asection *sec,
	262	const Elf_Internal_Rela *relocs)
252b5132 RH	263	{
	264	Elf_Internal_Shdr *symtab_hdr;
	265	struct elf_link_hash_entry sym_hashes, sym_hashes_end;
	266	const Elf_Internal_Rela *rel;
	267	const Elf_Internal_Rela *rel_end;
a7c10850	268
1049f94e	269	if (info->relocatable)
b34976b6	270	return TRUE;
a7c10850	271
252b5132 RH	272	symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 RH	273	sym_hashes = elf_sym_hashes (abfd);
a7c10850	274	sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
252b5132 RH	275	if (!elf_bad_symtab (abfd))
252b5132 RH	276	sym_hashes_end -= symtab_hdr->sh_info;
a7c10850	277
252b5132 RH	278	rel_end = relocs + sec->reloc_count;
	279	for (rel = relocs; rel < rel_end; rel++)
	280	{
	281	struct elf_link_hash_entry *h;
	282	unsigned long r_symndx;
a7c10850	283
252b5132 RH	284	r_symndx = ELF32_R_SYM (rel->r_info);
	285	if (r_symndx < symtab_hdr->sh_info)
	286	h = NULL;
	287	else
973a3492 L	288	{
	289	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	290	while (h->root.type == bfd_link_hash_indirect
	291	\|\| h->root.type == bfd_link_hash_warning)
	292	h = (struct elf_link_hash_entry *) h->root.u.i.link;
	293	}
a7c10850	294
252b5132 RH	295	switch (ELF32_R_TYPE (rel->r_info))
	296	{
	297	/* This relocation describes the C++ object vtable hierarchy.
	298	Reconstruct it for later use during GC. */
	299	case R_D10V_GNU_VTINHERIT:
c152c796	300	if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6	301	return FALSE;
252b5132	302	break;
a7c10850	303
252b5132 RH	304	/* This relocation describes which C++ vtable entries are actually
	305	used. Record for later use during GC. */
	306	case R_D10V_GNU_VTENTRY:
c152c796	307	if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6	308	return FALSE;
252b5132 RH	309	break;
	310	}
	311	}
a7c10850	312
b34976b6	313	return TRUE;
252b5132 RH	314	}
252b5132 RH	315
a2b0fe9d	316	static bfd_vma
47b0e7ad NC	317	extract_rel_addend (bfd *abfd,
	318	bfd_byte *where,
	319	reloc_howto_type *howto)
a2b0fe9d AM	320	{
	321	bfd_vma insn, val;
	322
	323	switch (howto->size)
	324	{
	325	case 0:
	326	insn = bfd_get_8 (abfd, where);
	327	break;
	328	case 1:
	329	insn = bfd_get_16 (abfd, where);
	330	break;
	331	case 2:
	332	insn = bfd_get_32 (abfd, where);
	333	break;
	334	default:
	335	abort ();
	336	}
	337
	338	val = (insn & howto->dst_mask) >> howto->bitpos << howto->rightshift;
	339	/* We should really be testing for signed addends here, but we don't
	340	have that info directly in the howto. */
	341	if (howto->pc_relative)
	342	{
	343	bfd_vma sign;
	344	sign = howto->dst_mask & (~howto->dst_mask >> 1 \| ~(-(bfd_vma) 1 >> 1));
	345	sign = sign >> howto->bitpos << howto->rightshift;
	346	val = (val ^ sign) - sign;
	347	}
	348	return val;
	349	}
	350
	351	static void
47b0e7ad NC	352	insert_rel_addend (bfd *abfd,
	353	bfd_byte *where,
	354	reloc_howto_type *howto,
	355	bfd_vma addend)
a2b0fe9d AM	356	{
	357	bfd_vma insn;
	358
	359	addend = (addend >> howto->rightshift << howto->bitpos) & howto->dst_mask;
	360	insn = ~howto->dst_mask;
	361	switch (howto->size)
	362	{
	363	case 0:
	364	insn &= bfd_get_8 (abfd, where);
	365	insn \|= addend;
	366	bfd_put_8 (abfd, insn, where);
	367	break;
	368	case 1:
	369	insn &= bfd_get_16 (abfd, where);
	370	insn \|= addend;
	371	bfd_put_16 (abfd, insn, where);
	372	break;
	373	case 2:
	374	insn &= bfd_get_32 (abfd, where);
	375	insn \|= addend;
	376	bfd_put_32 (abfd, insn, where);
	377	break;
	378	default:
	379	abort ();
	380	}
	381	}
	382
252b5132	383	/* Relocate a D10V ELF section. */
47b0e7ad	384
b34976b6	385	static bfd_boolean
47b0e7ad NC	386	elf32_d10v_relocate_section (bfd *output_bfd,
	387	struct bfd_link_info *info,
	388	bfd *input_bfd,
	389	asection *input_section,
	390	bfd_byte *contents,
	391	Elf_Internal_Rela *relocs,
	392	Elf_Internal_Sym *local_syms,
	393	asection **local_sections)
252b5132 RH	394	{
	395	Elf_Internal_Shdr *symtab_hdr;
	396	struct elf_link_hash_entry **sym_hashes;
	397	Elf_Internal_Rela rel, relend;
	398	const char *name;
	399
	400	symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
	401	sym_hashes = elf_sym_hashes (input_bfd);
	402
	403	rel = relocs;
	404	relend = relocs + input_section->reloc_count;
	405	for (; rel < relend; rel++)
	406	{
	407	int r_type;
	408	reloc_howto_type *howto;
	409	unsigned long r_symndx;
	410	Elf_Internal_Sym *sym;
	411	asection *sec;
	412	struct elf_link_hash_entry *h;
	413	bfd_vma relocation;
	414	bfd_reloc_status_type r;
	415
	416	r_symndx = ELF32_R_SYM (rel->r_info);
	417	r_type = ELF32_R_TYPE (rel->r_info);
	418
	419	if (r_type == R_D10V_GNU_VTENTRY
47b0e7ad	420	\|\| r_type == R_D10V_GNU_VTINHERIT)
252b5132 RH	421	continue;
	422
	423	howto = elf_d10v_howto_table + r_type;
252b5132 RH	424	h = NULL;
	425	sym = NULL;
	426	sec = NULL;
	427	if (r_symndx < symtab_hdr->sh_info)
	428	{
	429	sym = local_syms + r_symndx;
	430	sec = local_sections[r_symndx];
a2b0fe9d AM	431	relocation = (sec->output_section->vma
	432	+ sec->output_offset
	433	+ sym->st_value);
ab96bf03 AM	434	if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
	435	&& ((sec->flags & SEC_MERGE) != 0
	436	\|\| (info->relocatable
	437	&& sec->output_offset != 0)))
a2b0fe9d	438	{
a2b0fe9d AM	439	bfd_vma addend;
	440	bfd_byte *where = contents + rel->r_offset;
	441
	442	addend = extract_rel_addend (input_bfd, where, howto);
ab96bf03 AM	443
	444	if (info->relocatable)
	445	addend += sec->output_offset;
	446	else
	447	{
	448	asection *msec = sec;
	449	addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
	450	addend);
	451	addend -= relocation;
	452	addend += msec->output_section->vma + msec->output_offset;
	453	}
a2b0fe9d AM	454	insert_rel_addend (input_bfd, where, howto, addend);
a2b0fe9d AM	455	}
252b5132 RH	456	}
	457	else
	458	{
59c2e50f L	459	bfd_boolean unresolved_reloc, warned;
59c2e50f L	460
b2a8e766 AM	461	RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
	462	r_symndx, symtab_hdr, sym_hashes,
	463	h, sec, relocation,
	464	unresolved_reloc, warned);
252b5132 RH	465	}
252b5132 RH	466
ab96bf03	467	if (sec != NULL && elf_discarded_section (sec))
b1e24c02	468	{
ab96bf03 AM	469	/* For relocs against symbols from removed linkonce sections,
	470	or sections discarded by a linker script, we just want the
	471	section contents zeroed. Avoid any special processing. */
b1e24c02	472	_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
ab96bf03 AM	473	rel->r_info = 0;
ab96bf03 AM	474	rel->r_addend = 0;
b1e24c02 DJ	475	continue;
	476	}
	477
ab96bf03 AM	478	if (info->relocatable)
	479	continue;
	480
252b5132 RH	481	if (h != NULL)
	482	name = h->root.root.string;
	483	else
	484	{
	485	name = (bfd_elf_string_from_elf_section
	486	(input_bfd, symtab_hdr->sh_link, sym->st_name));
	487	if (name == NULL \|\| *name == '\0')
	488	name = bfd_section_name (input_bfd, sec);
	489	}
a7c10850	490
252b5132 RH	491	r = _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132 RH	492	contents, rel->r_offset,
a2b0fe9d	493	relocation, (bfd_vma) 0);
252b5132 RH	494
	495	if (r != bfd_reloc_ok)
	496	{
	497	const char * msg = (const char *) 0;
	498
	499	switch (r)
	500	{
	501	case bfd_reloc_overflow:
	502	if (!((*info->callbacks->reloc_overflow)
47b0e7ad	503	(info, (h ? &h->root : NULL), name, howto->name,
dfeffb9f L	504	(bfd_vma) 0, input_bfd, input_section,
dfeffb9f L	505	rel->r_offset)))
b34976b6	506	return FALSE;
252b5132 RH	507	break;
	508
	509	case bfd_reloc_undefined:
	510	if (!((*info->callbacks->undefined_symbol)
	511	(info, name, input_bfd, input_section,
b34976b6 AM	512	rel->r_offset, TRUE)))
b34976b6 AM	513	return FALSE;
252b5132 RH	514	break;
	515
	516	case bfd_reloc_outofrange:
517662d4	517	msg = _("internal error: out of range error");
252b5132 RH	518	goto common_error;
	519
	520	case bfd_reloc_notsupported:
517662d4	521	msg = _("internal error: unsupported relocation error");
252b5132 RH	522	goto common_error;
	523
	524	case bfd_reloc_dangerous:
517662d4	525	msg = _("internal error: dangerous error");
252b5132 RH	526	goto common_error;
	527
	528	default:
517662d4	529	msg = _("internal error: unknown error");
252b5132 RH	530	/* fall through */
	531
	532	common_error:
	533	if (!((*info->callbacks->warning)
	534	(info, msg, name, input_bfd, input_section,
	535	rel->r_offset)))
b34976b6	536	return FALSE;
252b5132 RH	537	break;
	538	}
	539	}
	540	}
	541
b34976b6	542	return TRUE;
252b5132 RH	543	}
252b5132 RH	544	#define ELF_ARCH bfd_arch_d10v
aa4f99bb AO	545	#define ELF_MACHINE_CODE EM_D10V
aa4f99bb AO	546	#define ELF_MACHINE_ALT1 EM_CYGNUS_D10V
252b5132 RH	547	#define ELF_MAXPAGESIZE 0x1000
	548
	549	#define TARGET_BIG_SYM bfd_elf32_d10v_vec
	550	#define TARGET_BIG_NAME "elf32-d10v"
	551
	552	#define elf_info_to_howto 0
	553	#define elf_info_to_howto_rel d10v_info_to_howto_rel
	554	#define elf_backend_object_p 0
	555	#define elf_backend_final_write_processing 0
	556	#define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
252b5132 RH	557	#define elf_backend_check_relocs elf32_d10v_check_relocs
	558	#define elf_backend_relocate_section elf32_d10v_relocate_section
	559	#define elf_backend_can_gc_sections 1
	560
	561	#include "elf32-target.h"