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

/* D10V-specific support for 32-bit ELF
   Copyright 1996, 1998, 1999, 2000, 2001, 2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

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

static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
  PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
static void d10v_info_to_howto_rel
  PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
static asection * elf32_d10v_gc_mark_hook
  PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
	   struct elf_link_hash_entry *, Elf_Internal_Sym *));
static bfd_boolean elf32_d10v_gc_sweep_hook
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
	   const Elf_Internal_Rela *));
static bfd_boolean elf32_d10v_check_relocs
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
	   const Elf_Internal_Rela *));
static bfd_boolean elf32_d10v_relocate_section
  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
	   bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *,
	   asection **));

/* 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) */
	   7,	                /* bitsize */
	   TRUE,	        /* pc_relative */
	   0,	                /* bitpos */
	   complain_overflow_bitfield, /* 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) */
	   7,	                /* bitsize */
	   TRUE,	        /* pc_relative */
	   15,	                /* bitpos */
	   complain_overflow_bitfield, /* 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) */
	   15,			/* bitsize */
	   TRUE,		/* pc_relative */
	   0,			/* bitpos */
	   complain_overflow_bitfield, /* 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 (abfd, code)
     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;
}

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

static void
d10v_info_to_howto_rel (abfd, cache_ptr, dst)
     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 (sec, info, rel, h, sym)
     asection *sec;
     struct bfd_link_info *info ATTRIBUTE_UNUSED;
     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:
        break;

      default:
        switch (h->root.type)
          {
          case bfd_link_hash_defined:
          case bfd_link_hash_defweak:
            return h->root.u.def.section;

          case bfd_link_hash_common:
            return h->root.u.c.p->section;

	  default:
	    break;
          }
       }
     }
   else
     return bfd_section_from_elf_index (sec->owner, sym->st_shndx);

  return NULL;
}

static bfd_boolean
elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs)
     bfd *abfd ATTRIBUTE_UNUSED;
     struct bfd_link_info *info ATTRIBUTE_UNUSED;
     asection *sec ATTRIBUTE_UNUSED;
     const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
{
  /* we don't use got and plt entries for d10v */
  return TRUE;
}

/* 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 (abfd, info, sec, 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->relocateable)
    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];

      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_elf32_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_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
            return FALSE;
          break;
        }
    }

  return TRUE;
}

/* Relocate a D10V ELF section.  */
static bfd_boolean
elf32_d10v_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, *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;

      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 = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
	}
      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);
	    }
	  else if (h->root.type == bfd_link_hash_undefweak)
	    relocation = 0;
	  else
	    {
	      if (!((*info->callbacks->undefined_symbol)
		    (info, h->root.root.string, input_bfd,
		     input_section, rel->r_offset, TRUE)))
		return FALSE;
	      relocation = 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);
	}

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

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

	  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, 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_gc_sweep_hook            elf32_d10v_gc_sweep_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
57fb03ac	2	Copyright 1996, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
252b5132 RH	3	Contributed by Martin Hunt (hunt@cygnus.com).
	4
	5	This file is part of BFD, the Binary File Descriptor library.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	20
	21	#include "bfd.h"
	22	#include "sysdep.h"
	23	#include "libbfd.h"
	24	#include "elf-bfd.h"
1b452ec6	25	#include "elf/d10v.h"
252b5132 RH	26
	27	static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
	28	PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
	29	static void d10v_info_to_howto_rel
947216bf	30	PARAMS ((bfd , arelent , Elf_Internal_Rela *));
917583ad	31	static asection * elf32_d10v_gc_mark_hook
1e2f5b6e	32	PARAMS ((asection , struct bfd_link_info , Elf_Internal_Rela *,
917583ad	33	struct elf_link_hash_entry , Elf_Internal_Sym ));
b34976b6	34	static bfd_boolean elf32_d10v_gc_sweep_hook
917583ad NC	35	PARAMS ((bfd , struct bfd_link_info , asection *,
917583ad NC	36	const Elf_Internal_Rela *));
b34976b6	37	static bfd_boolean elf32_d10v_check_relocs
917583ad NC	38	PARAMS ((bfd , struct bfd_link_info , asection *,
917583ad NC	39	const Elf_Internal_Rela *));
b34976b6	40	static bfd_boolean elf32_d10v_relocate_section
917583ad NC	41	PARAMS ((bfd , struct bfd_link_info , bfd , asection ,
	42	bfd_byte , Elf_Internal_Rela , Elf_Internal_Sym *,
	43	asection **));
	44
	45	/* Use REL instead of RELA to save space. */
acf8aed4	46	#define USE_REL 1
252b5132	47
252b5132	48	static reloc_howto_type elf_d10v_howto_table[] =
917583ad NC	49	{
	50	/* This reloc does nothing. */
	51	HOWTO (R_D10V_NONE, /* type */
	52	0, /* rightshift */
	53	2, /* size (0 = byte, 1 = short, 2 = long) */
	54	32, /* bitsize */
b34976b6	55	FALSE, /* pc_relative */
917583ad	56	0, /* bitpos */
2888ec15 AO	57	complain_overflow_dont, /* complain_on_overflow */
	58	bfd_elf_generic_reloc, /* special_function */
	59	"R_D10V_NONE", /* name */
b34976b6	60	FALSE, /* partial_inplace */
917583ad NC	61	0, /* src_mask */
917583ad NC	62	0, /* dst_mask */
b34976b6	63	FALSE), /* pcrel_offset */
917583ad NC	64
	65	/* An PC Relative 10-bit relocation, shifted by 2 */
	66	/* right container */
	67	HOWTO (R_D10V_10_PCREL_R, /* type */
	68	2, /* rightshift */
	69	2, /* size (0 = byte, 1 = short, 2 = long) */
57fb03ac	70	7, /* bitsize */
b34976b6	71	TRUE, /* pc_relative */
917583ad	72	0, /* bitpos */
57fb03ac	73	complain_overflow_bitfield, /* complain_on_overflow */
917583ad NC	74	bfd_elf_generic_reloc, /* special_function */
917583ad NC	75	"R_D10V_10_PCREL_R", /* name */
b34976b6	76	FALSE, /* partial_inplace */
2888ec15	77	0xff, /* src_mask */
917583ad	78	0xff, /* dst_mask */
b34976b6	79	TRUE), /* pcrel_offset */
917583ad NC	80
	81	/* An PC Relative 10-bit relocation, shifted by 2 */
	82	/* left container */
	83	HOWTO (R_D10V_10_PCREL_L, /* type */
	84	2, /* rightshift */
	85	2, /* size (0 = byte, 1 = short, 2 = long) */
57fb03ac	86	7, /* bitsize */
b34976b6	87	TRUE, /* pc_relative */
917583ad	88	15, /* bitpos */
57fb03ac	89	complain_overflow_bitfield, /* complain_on_overflow */
917583ad NC	90	bfd_elf_generic_reloc, /* special_function */
917583ad NC	91	"R_D10V_10_PCREL_L", /* name */
b34976b6	92	FALSE, /* partial_inplace */
2888ec15 AO	93	0x07f8000, /* src_mask */
2888ec15 AO	94	0x07f8000, /* dst_mask */
b34976b6	95	TRUE), /* pcrel_offset */
917583ad NC	96
	97	/* A 16 bit absolute relocation */
	98	HOWTO (R_D10V_16, /* type */
	99	0, /* rightshift */
	100	1, /* size (0 = byte, 1 = short, 2 = long) */
	101	16, /* bitsize */
b34976b6	102	FALSE, /* pc_relative */
917583ad NC	103	0, /* bitpos */
917583ad NC	104	complain_overflow_dont, /* complain_on_overflow */
2888ec15	105	bfd_elf_generic_reloc, /* special_function */
917583ad	106	"R_D10V_16", /* name */
b34976b6	107	FALSE, /* partial_inplace */
917583ad NC	108	0xffff, /* src_mask */
917583ad NC	109	0xffff, /* dst_mask */
b34976b6	110	FALSE), /* pcrel_offset */
917583ad NC	111
	112	/* An 18 bit absolute relocation, right shifted 2 */
	113	HOWTO (R_D10V_18, /* type */
	114	2, /* rightshift */
	115	1, /* size (0 = byte, 1 = short, 2 = long) */
2888ec15	116	16, /* bitsize */
b34976b6	117	FALSE, /* pc_relative */
917583ad NC	118	0, /* bitpos */
917583ad NC	119	complain_overflow_dont, /* complain_on_overflow */
2888ec15	120	bfd_elf_generic_reloc, /* special_function */
917583ad	121	"R_D10V_18", /* name */
b34976b6	122	FALSE, /* partial_inplace */
917583ad NC	123	0xffff, /* src_mask */
917583ad NC	124	0xffff, /* dst_mask */
b34976b6	125	FALSE), /* pcrel_offset */
917583ad NC	126
	127	/* A relative 18 bit relocation, right shifted by 2 */
	128	HOWTO (R_D10V_18_PCREL, /* type */
	129	2, /* rightshift */
	130	2, /* size (0 = byte, 1 = short, 2 = long) */
57fb03ac	131	15, /* bitsize */
b34976b6	132	TRUE, /* pc_relative */
917583ad	133	0, /* bitpos */
57fb03ac	134	complain_overflow_bitfield, /* complain_on_overflow */
2888ec15	135	bfd_elf_generic_reloc, /* special_function */
917583ad	136	"R_D10V_18_PCREL", /* name */
b34976b6	137	FALSE, /* partial_inplace */
917583ad NC	138	0xffff, /* src_mask */
917583ad NC	139	0xffff, /* dst_mask */
b34976b6	140	TRUE), /* pcrel_offset */
917583ad NC	141
	142	/* A 32 bit absolute relocation */
	143	HOWTO (R_D10V_32, /* type */
	144	0, /* rightshift */
	145	2, /* size (0 = byte, 1 = short, 2 = long) */
	146	32, /* bitsize */
b34976b6	147	FALSE, /* pc_relative */
917583ad	148	0, /* bitpos */
2888ec15 AO	149	complain_overflow_dont, /* complain_on_overflow */
2888ec15 AO	150	bfd_elf_generic_reloc, /* special_function */
917583ad	151	"R_D10V_32", /* name */
b34976b6	152	FALSE, /* partial_inplace */
917583ad NC	153	0xffffffff, /* src_mask */
917583ad NC	154	0xffffffff, /* dst_mask */
b34976b6	155	FALSE), /* pcrel_offset */
917583ad NC	156
	157	/* GNU extension to record C++ vtable hierarchy */
	158	HOWTO (R_D10V_GNU_VTINHERIT, /* type */
	159	0, /* rightshift */
	160	2, /* size (0 = byte, 1 = short, 2 = long) */
	161	0, /* bitsize */
b34976b6	162	FALSE, /* pc_relative */
917583ad NC	163	0, /* bitpos */
	164	complain_overflow_dont, /* complain_on_overflow */
	165	NULL, /* special_function */
	166	"R_D10V_GNU_VTINHERIT", /* name */
b34976b6	167	FALSE, /* partial_inplace */
917583ad NC	168	0, /* src_mask */
917583ad NC	169	0, /* dst_mask */
b34976b6	170	FALSE), /* pcrel_offset */
917583ad NC	171
	172	/* GNU extension to record C++ vtable member usage */
	173	HOWTO (R_D10V_GNU_VTENTRY, /* type */
	174	0, /* rightshift */
	175	2, /* size (0 = byte, 1 = short, 2 = long) */
	176	0, /* bitsize */
b34976b6	177	FALSE, /* pc_relative */
917583ad NC	178	0, /* bitpos */
	179	complain_overflow_dont, /* complain_on_overflow */
	180	_bfd_elf_rel_vtable_reloc_fn, /* special_function */
	181	"R_D10V_GNU_VTENTRY", /* name */
b34976b6	182	FALSE, /* partial_inplace */
917583ad NC	183	0, /* src_mask */
917583ad NC	184	0, /* dst_mask */
b34976b6	185	FALSE), /* pcrel_offset */
917583ad	186	};
252b5132 RH	187
	188	/* Map BFD reloc types to D10V ELF reloc types. */
	189
	190	struct d10v_reloc_map
917583ad NC	191	{
	192	bfd_reloc_code_real_type bfd_reloc_val;
	193	unsigned char elf_reloc_val;
	194	};
	195
	196	static const struct d10v_reloc_map d10v_reloc_map[] =
	197	{
	198	{ BFD_RELOC_NONE, R_D10V_NONE, },
	199	{ BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R },
	200	{ BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L },
	201	{ BFD_RELOC_16, R_D10V_16 },
	202	{ BFD_RELOC_D10V_18, R_D10V_18 },
	203	{ BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL },
	204	{ BFD_RELOC_32, R_D10V_32 },
	205	{ BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT },
	206	{ BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY },
	207	};
252b5132 RH	208
	209	static reloc_howto_type *
	210	bfd_elf32_bfd_reloc_type_lookup (abfd, code)
5f771d47	211	bfd *abfd ATTRIBUTE_UNUSED;
252b5132 RH	212	bfd_reloc_code_real_type code;
	213	{
	214	unsigned int i;
	215
	216	for (i = 0;
	217	i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map);
	218	i++)
	219	{
	220	if (d10v_reloc_map[i].bfd_reloc_val == code)
	221	return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val];
	222	}
	223
	224	return NULL;
	225	}
	226
	227	/* Set the howto pointer for an D10V ELF reloc. */
	228
	229	static void
	230	d10v_info_to_howto_rel (abfd, cache_ptr, dst)
5f771d47	231	bfd *abfd ATTRIBUTE_UNUSED;
252b5132	232	arelent *cache_ptr;
947216bf	233	Elf_Internal_Rela *dst;
252b5132 RH	234	{
	235	unsigned int r_type;
	236
	237	r_type = ELF32_R_TYPE (dst->r_info);
	238	BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
	239	cache_ptr->howto = &elf_d10v_howto_table[r_type];
	240	}
	241
	242	static asection *
1e2f5b6e AM	243	elf32_d10v_gc_mark_hook (sec, info, rel, h, sym)
	244	asection *sec;
	245	struct bfd_link_info *info ATTRIBUTE_UNUSED;
	246	Elf_Internal_Rela *rel;
	247	struct elf_link_hash_entry *h;
	248	Elf_Internal_Sym *sym;
252b5132 RH	249	{
	250	if (h != NULL)
	251	{
	252	switch (ELF32_R_TYPE (rel->r_info))
	253	{
	254	case R_D10V_GNU_VTINHERIT:
	255	case R_D10V_GNU_VTENTRY:
	256	break;
	257
	258	default:
	259	switch (h->root.type)
	260	{
	261	case bfd_link_hash_defined:
	262	case bfd_link_hash_defweak:
	263	return h->root.u.def.section;
	264
	265	case bfd_link_hash_common:
	266	return h->root.u.c.p->section;
e049a0de ILT	267
	268	default:
	269	break;
252b5132 RH	270	}
	271	}
	272	}
	273	else
1e2f5b6e AM	274	return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1e2f5b6e AM	275
252b5132 RH	276	return NULL;
	277	}
	278
b34976b6	279	static bfd_boolean
252b5132	280	elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47 ILT	281	bfd *abfd ATTRIBUTE_UNUSED;
	282	struct bfd_link_info *info ATTRIBUTE_UNUSED;
	283	asection *sec ATTRIBUTE_UNUSED;
	284	const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 RH	285	{
252b5132 RH	286	/* we don't use got and plt entries for d10v */
b34976b6	287	return TRUE;
252b5132 RH	288	}
	289
	290	/* Look through the relocs for a section during the first phase.
	291	Since we don't do .gots or .plts, we just need to consider the
	292	virtual table relocs for gc. */
a7c10850	293
b34976b6	294	static bfd_boolean
252b5132 RH	295	elf32_d10v_check_relocs (abfd, info, sec, relocs)
	296	bfd *abfd;
	297	struct bfd_link_info *info;
	298	asection *sec;
	299	const Elf_Internal_Rela *relocs;
	300	{
	301	Elf_Internal_Shdr *symtab_hdr;
	302	struct elf_link_hash_entry sym_hashes, sym_hashes_end;
	303	const Elf_Internal_Rela *rel;
	304	const Elf_Internal_Rela *rel_end;
a7c10850	305
252b5132	306	if (info->relocateable)
b34976b6	307	return TRUE;
a7c10850	308
252b5132 RH	309	symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 RH	310	sym_hashes = elf_sym_hashes (abfd);
a7c10850	311	sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
252b5132 RH	312	if (!elf_bad_symtab (abfd))
252b5132 RH	313	sym_hashes_end -= symtab_hdr->sh_info;
a7c10850	314
252b5132 RH	315	rel_end = relocs + sec->reloc_count;
	316	for (rel = relocs; rel < rel_end; rel++)
	317	{
	318	struct elf_link_hash_entry *h;
	319	unsigned long r_symndx;
a7c10850	320
252b5132 RH	321	r_symndx = ELF32_R_SYM (rel->r_info);
	322	if (r_symndx < symtab_hdr->sh_info)
	323	h = NULL;
	324	else
	325	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
a7c10850	326
252b5132 RH	327	switch (ELF32_R_TYPE (rel->r_info))
	328	{
	329	/* This relocation describes the C++ object vtable hierarchy.
	330	Reconstruct it for later use during GC. */
	331	case R_D10V_GNU_VTINHERIT:
	332	if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6	333	return FALSE;
252b5132	334	break;
a7c10850	335
252b5132 RH	336	/* This relocation describes which C++ vtable entries are actually
	337	used. Record for later use during GC. */
	338	case R_D10V_GNU_VTENTRY:
	339	if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6	340	return FALSE;
252b5132 RH	341	break;
	342	}
	343	}
a7c10850	344
b34976b6	345	return TRUE;
252b5132 RH	346	}
	347
	348	/* Relocate a D10V ELF section. */
b34976b6	349	static bfd_boolean
252b5132 RH	350	elf32_d10v_relocate_section (output_bfd, info, input_bfd, input_section,
252b5132 RH	351	contents, relocs, local_syms, local_sections)
f8df10f4	352	bfd *output_bfd;
252b5132 RH	353	struct bfd_link_info *info;
	354	bfd *input_bfd;
	355	asection *input_section;
	356	bfd_byte *contents;
	357	Elf_Internal_Rela *relocs;
	358	Elf_Internal_Sym *local_syms;
	359	asection **local_sections;
	360	{
	361	Elf_Internal_Shdr *symtab_hdr;
	362	struct elf_link_hash_entry **sym_hashes;
	363	Elf_Internal_Rela rel, relend;
	364	const char *name;
	365
	366	symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
	367	sym_hashes = elf_sym_hashes (input_bfd);
	368
	369	rel = relocs;
	370	relend = relocs + input_section->reloc_count;
	371	for (; rel < relend; rel++)
	372	{
	373	int r_type;
	374	reloc_howto_type *howto;
	375	unsigned long r_symndx;
	376	Elf_Internal_Sym *sym;
	377	asection *sec;
	378	struct elf_link_hash_entry *h;
	379	bfd_vma relocation;
	380	bfd_reloc_status_type r;
	381
	382	r_symndx = ELF32_R_SYM (rel->r_info);
	383	r_type = ELF32_R_TYPE (rel->r_info);
	384
	385	if (r_type == R_D10V_GNU_VTENTRY
	386	\|\| r_type == R_D10V_GNU_VTINHERIT )
	387	continue;
	388
	389	howto = elf_d10v_howto_table + r_type;
	390
	391	if (info->relocateable)
	392	{
	393	/* This is a relocateable link. We don't have to change
	394	anything, unless the reloc is against a section symbol,
	395	in which case we have to adjust according to where the
	396	section symbol winds up in the output section. */
	397	if (r_symndx < symtab_hdr->sh_info)
	398	{
	399	sym = local_syms + r_symndx;
	400	if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
	401	{
	402	sec = local_sections[r_symndx];
	403	rel->r_addend += sec->output_offset + sym->st_value;
	404	}
	405	}
	406
	407	continue;
	408	}
	409
	410	/* This is a final link. */
	411	h = NULL;
	412	sym = NULL;
	413	sec = NULL;
	414	if (r_symndx < symtab_hdr->sh_info)
	415	{
	416	sym = local_syms + r_symndx;
417	sec = local_sections[r_symndx];
f8df10f4	418	relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
252b5132 RH	419	}
	420	else
	421	{
	422	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	423	while (h->root.type == bfd_link_hash_indirect
	424	\|\| h->root.type == bfd_link_hash_warning)
	425	h = (struct elf_link_hash_entry *) h->root.u.i.link;
	426	if (h->root.type == bfd_link_hash_defined
	427	\|\| h->root.type == bfd_link_hash_defweak)
	428	{
	429	sec = h->root.u.def.section;
	430	relocation = (h->root.u.def.value
	431	+ sec->output_section->vma
	432	+ sec->output_offset);
	433	}
	434	else if (h->root.type == bfd_link_hash_undefweak)
	435	relocation = 0;
	436	else
	437	{
	438	if (!((*info->callbacks->undefined_symbol)
	439	(info, h->root.root.string, input_bfd,
b34976b6 AM	440	input_section, rel->r_offset, TRUE)))
b34976b6 AM	441	return FALSE;
252b5132 RH	442	relocation = 0;
	443	}
	444	}
	445
	446	if (h != NULL)
	447	name = h->root.root.string;
	448	else
	449	{
	450	name = (bfd_elf_string_from_elf_section
	451	(input_bfd, symtab_hdr->sh_link, sym->st_name));
	452	if (name == NULL \|\| *name == '\0')
	453	name = bfd_section_name (input_bfd, sec);
	454	}
a7c10850	455
252b5132 RH	456	r = _bfd_final_link_relocate (howto, input_bfd, input_section,
	457	contents, rel->r_offset,
	458	relocation, rel->r_addend);
	459
	460	if (r != bfd_reloc_ok)
	461	{
	462	const char * msg = (const char *) 0;
	463
	464	switch (r)
	465	{
	466	case bfd_reloc_overflow:
	467	if (!((*info->callbacks->reloc_overflow)
	468	(info, name, howto->name, (bfd_vma) 0,
	469	input_bfd, input_section, rel->r_offset)))
b34976b6	470	return FALSE;
252b5132 RH	471	break;
	472
	473	case bfd_reloc_undefined:
	474	if (!((*info->callbacks->undefined_symbol)
	475	(info, name, input_bfd, input_section,
b34976b6 AM	476	rel->r_offset, TRUE)))
b34976b6 AM	477	return FALSE;
252b5132 RH	478	break;
	479
	480	case bfd_reloc_outofrange:
517662d4	481	msg = _("internal error: out of range error");
252b5132 RH	482	goto common_error;
	483
	484	case bfd_reloc_notsupported:
517662d4	485	msg = _("internal error: unsupported relocation error");
252b5132 RH	486	goto common_error;
	487
	488	case bfd_reloc_dangerous:
517662d4	489	msg = _("internal error: dangerous error");
252b5132 RH	490	goto common_error;
	491
	492	default:
517662d4	493	msg = _("internal error: unknown error");
252b5132 RH	494	/* fall through */
	495
	496	common_error:
	497	if (!((*info->callbacks->warning)
	498	(info, msg, name, input_bfd, input_section,
	499	rel->r_offset)))
b34976b6	500	return FALSE;
252b5132 RH	501	break;
	502	}
	503	}
	504	}
	505
b34976b6	506	return TRUE;
252b5132 RH	507	}
252b5132 RH	508	#define ELF_ARCH bfd_arch_d10v
aa4f99bb AO	509	#define ELF_MACHINE_CODE EM_D10V
aa4f99bb AO	510	#define ELF_MACHINE_ALT1 EM_CYGNUS_D10V
252b5132 RH	511	#define ELF_MAXPAGESIZE 0x1000
	512
	513	#define TARGET_BIG_SYM bfd_elf32_d10v_vec
	514	#define TARGET_BIG_NAME "elf32-d10v"
	515
	516	#define elf_info_to_howto 0
	517	#define elf_info_to_howto_rel d10v_info_to_howto_rel
	518	#define elf_backend_object_p 0
	519	#define elf_backend_final_write_processing 0
	520	#define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
	521	#define elf_backend_gc_sweep_hook elf32_d10v_gc_sweep_hook
	522	#define elf_backend_check_relocs elf32_d10v_check_relocs
	523	#define elf_backend_relocate_section elf32_d10v_relocate_section
	524	#define elf_backend_can_gc_sections 1
	525
	526	#include "elf32-target.h"