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

/* D10V-specific support for 32-bit ELF
   Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003
   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->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];

      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->relocatable)
	{
	  /* This is a relocatable 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
1049f94e AM	2	Copyright 1996, 1998, 1999, 2000, 2001, 2002, 2003
1049f94e AM	3	Free Software Foundation, Inc.
252b5132 RH	4	Contributed by Martin Hunt (hunt@cygnus.com).
	5
	6	This file is part of BFD, the Binary File Descriptor library.
	7
	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.
	12
	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.
	17
	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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	21
	22	#include "bfd.h"
	23	#include "sysdep.h"
	24	#include "libbfd.h"
	25	#include "elf-bfd.h"
1b452ec6	26	#include "elf/d10v.h"
252b5132 RH	27
	28	static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
	29	PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
	30	static void d10v_info_to_howto_rel
947216bf	31	PARAMS ((bfd , arelent , Elf_Internal_Rela *));
917583ad	32	static asection * elf32_d10v_gc_mark_hook
1e2f5b6e	33	PARAMS ((asection , struct bfd_link_info , Elf_Internal_Rela *,
917583ad	34	struct elf_link_hash_entry , Elf_Internal_Sym ));
b34976b6	35	static bfd_boolean elf32_d10v_gc_sweep_hook
917583ad NC	36	PARAMS ((bfd , struct bfd_link_info , asection *,
917583ad NC	37	const Elf_Internal_Rela *));
b34976b6	38	static bfd_boolean elf32_d10v_check_relocs
917583ad NC	39	PARAMS ((bfd , struct bfd_link_info , asection *,
917583ad NC	40	const Elf_Internal_Rela *));
b34976b6	41	static bfd_boolean elf32_d10v_relocate_section
917583ad NC	42	PARAMS ((bfd , struct bfd_link_info , bfd , asection ,
	43	bfd_byte , Elf_Internal_Rela , Elf_Internal_Sym *,
	44	asection **));
	45
	46	/* Use REL instead of RELA to save space. */
acf8aed4	47	#define USE_REL 1
252b5132	48
252b5132	49	static reloc_howto_type elf_d10v_howto_table[] =
917583ad NC	50	{
	51	/* This reloc does nothing. */
	52	HOWTO (R_D10V_NONE, /* type */
	53	0, /* rightshift */
	54	2, /* size (0 = byte, 1 = short, 2 = long) */
	55	32, /* bitsize */
b34976b6	56	FALSE, /* pc_relative */
917583ad	57	0, /* bitpos */
2888ec15 AO	58	complain_overflow_dont, /* complain_on_overflow */
	59	bfd_elf_generic_reloc, /* special_function */
	60	"R_D10V_NONE", /* name */
b34976b6	61	FALSE, /* partial_inplace */
917583ad NC	62	0, /* src_mask */
917583ad NC	63	0, /* dst_mask */
b34976b6	64	FALSE), /* pcrel_offset */
917583ad NC	65
	66	/* An PC Relative 10-bit relocation, shifted by 2 */
	67	/* right container */
	68	HOWTO (R_D10V_10_PCREL_R, /* type */
	69	2, /* rightshift */
	70	2, /* size (0 = byte, 1 = short, 2 = long) */
57fb03ac	71	7, /* bitsize */
b34976b6	72	TRUE, /* pc_relative */
917583ad	73	0, /* bitpos */
57fb03ac	74	complain_overflow_bitfield, /* complain_on_overflow */
917583ad NC	75	bfd_elf_generic_reloc, /* special_function */
917583ad NC	76	"R_D10V_10_PCREL_R", /* name */
b34976b6	77	FALSE, /* partial_inplace */
2888ec15	78	0xff, /* src_mask */
917583ad	79	0xff, /* dst_mask */
b34976b6	80	TRUE), /* pcrel_offset */
917583ad NC	81
	82	/* An PC Relative 10-bit relocation, shifted by 2 */
	83	/* left container */
	84	HOWTO (R_D10V_10_PCREL_L, /* type */
	85	2, /* rightshift */
	86	2, /* size (0 = byte, 1 = short, 2 = long) */
57fb03ac	87	7, /* bitsize */
b34976b6	88	TRUE, /* pc_relative */
917583ad	89	15, /* bitpos */
57fb03ac	90	complain_overflow_bitfield, /* complain_on_overflow */
917583ad NC	91	bfd_elf_generic_reloc, /* special_function */
917583ad NC	92	"R_D10V_10_PCREL_L", /* name */
b34976b6	93	FALSE, /* partial_inplace */
2888ec15 AO	94	0x07f8000, /* src_mask */
2888ec15 AO	95	0x07f8000, /* dst_mask */
b34976b6	96	TRUE), /* pcrel_offset */
917583ad NC	97
	98	/* A 16 bit absolute relocation */
	99	HOWTO (R_D10V_16, /* type */
	100	0, /* rightshift */
	101	1, /* size (0 = byte, 1 = short, 2 = long) */
	102	16, /* bitsize */
b34976b6	103	FALSE, /* pc_relative */
917583ad NC	104	0, /* bitpos */
917583ad NC	105	complain_overflow_dont, /* complain_on_overflow */
2888ec15	106	bfd_elf_generic_reloc, /* special_function */
917583ad	107	"R_D10V_16", /* name */
b34976b6	108	FALSE, /* partial_inplace */
917583ad NC	109	0xffff, /* src_mask */
917583ad NC	110	0xffff, /* dst_mask */
b34976b6	111	FALSE), /* pcrel_offset */
917583ad NC	112
	113	/* An 18 bit absolute relocation, right shifted 2 */
	114	HOWTO (R_D10V_18, /* type */
	115	2, /* rightshift */
	116	1, /* size (0 = byte, 1 = short, 2 = long) */
2888ec15	117	16, /* bitsize */
b34976b6	118	FALSE, /* pc_relative */
917583ad NC	119	0, /* bitpos */
917583ad NC	120	complain_overflow_dont, /* complain_on_overflow */
2888ec15	121	bfd_elf_generic_reloc, /* special_function */
917583ad	122	"R_D10V_18", /* name */
b34976b6	123	FALSE, /* partial_inplace */
917583ad NC	124	0xffff, /* src_mask */
917583ad NC	125	0xffff, /* dst_mask */
b34976b6	126	FALSE), /* pcrel_offset */
917583ad NC	127
	128	/* A relative 18 bit relocation, right shifted by 2 */
	129	HOWTO (R_D10V_18_PCREL, /* type */
	130	2, /* rightshift */
	131	2, /* size (0 = byte, 1 = short, 2 = long) */
57fb03ac	132	15, /* bitsize */
b34976b6	133	TRUE, /* pc_relative */
917583ad	134	0, /* bitpos */
57fb03ac	135	complain_overflow_bitfield, /* complain_on_overflow */
2888ec15	136	bfd_elf_generic_reloc, /* special_function */
917583ad	137	"R_D10V_18_PCREL", /* name */
b34976b6	138	FALSE, /* partial_inplace */
917583ad NC	139	0xffff, /* src_mask */
917583ad NC	140	0xffff, /* dst_mask */
b34976b6	141	TRUE), /* pcrel_offset */
917583ad NC	142
	143	/* A 32 bit absolute relocation */
	144	HOWTO (R_D10V_32, /* type */
	145	0, /* rightshift */
	146	2, /* size (0 = byte, 1 = short, 2 = long) */
	147	32, /* bitsize */
b34976b6	148	FALSE, /* pc_relative */
917583ad	149	0, /* bitpos */
2888ec15 AO	150	complain_overflow_dont, /* complain_on_overflow */
2888ec15 AO	151	bfd_elf_generic_reloc, /* special_function */
917583ad	152	"R_D10V_32", /* name */
b34976b6	153	FALSE, /* partial_inplace */
917583ad NC	154	0xffffffff, /* src_mask */
917583ad NC	155	0xffffffff, /* dst_mask */
b34976b6	156	FALSE), /* pcrel_offset */
917583ad NC	157
	158	/* GNU extension to record C++ vtable hierarchy */
	159	HOWTO (R_D10V_GNU_VTINHERIT, /* type */
	160	0, /* rightshift */
	161	2, /* size (0 = byte, 1 = short, 2 = long) */
	162	0, /* bitsize */
b34976b6	163	FALSE, /* pc_relative */
917583ad NC	164	0, /* bitpos */
	165	complain_overflow_dont, /* complain_on_overflow */
	166	NULL, /* special_function */
	167	"R_D10V_GNU_VTINHERIT", /* name */
b34976b6	168	FALSE, /* partial_inplace */
917583ad NC	169	0, /* src_mask */
917583ad NC	170	0, /* dst_mask */
b34976b6	171	FALSE), /* pcrel_offset */
917583ad NC	172
	173	/* GNU extension to record C++ vtable member usage */
	174	HOWTO (R_D10V_GNU_VTENTRY, /* type */
	175	0, /* rightshift */
	176	2, /* size (0 = byte, 1 = short, 2 = long) */
	177	0, /* bitsize */
b34976b6	178	FALSE, /* pc_relative */
917583ad NC	179	0, /* bitpos */
	180	complain_overflow_dont, /* complain_on_overflow */
	181	_bfd_elf_rel_vtable_reloc_fn, /* special_function */
	182	"R_D10V_GNU_VTENTRY", /* name */
b34976b6	183	FALSE, /* partial_inplace */
917583ad NC	184	0, /* src_mask */
917583ad NC	185	0, /* dst_mask */
b34976b6	186	FALSE), /* pcrel_offset */
917583ad	187	};
252b5132 RH	188
	189	/* Map BFD reloc types to D10V ELF reloc types. */
	190
	191	struct d10v_reloc_map
917583ad NC	192	{
	193	bfd_reloc_code_real_type bfd_reloc_val;
	194	unsigned char elf_reloc_val;
	195	};
	196
	197	static const struct d10v_reloc_map d10v_reloc_map[] =
	198	{
	199	{ BFD_RELOC_NONE, R_D10V_NONE, },
	200	{ BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R },
	201	{ BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L },
	202	{ BFD_RELOC_16, R_D10V_16 },
	203	{ BFD_RELOC_D10V_18, R_D10V_18 },
	204	{ BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL },
	205	{ BFD_RELOC_32, R_D10V_32 },
	206	{ BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT },
	207	{ BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY },
	208	};
252b5132 RH	209
	210	static reloc_howto_type *
	211	bfd_elf32_bfd_reloc_type_lookup (abfd, code)
5f771d47	212	bfd *abfd ATTRIBUTE_UNUSED;
252b5132 RH	213	bfd_reloc_code_real_type code;
	214	{
	215	unsigned int i;
	216
	217	for (i = 0;
	218	i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map);
	219	i++)
	220	{
	221	if (d10v_reloc_map[i].bfd_reloc_val == code)
	222	return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val];
	223	}
	224
	225	return NULL;
	226	}
	227
	228	/* Set the howto pointer for an D10V ELF reloc. */
	229
	230	static void
	231	d10v_info_to_howto_rel (abfd, cache_ptr, dst)
5f771d47	232	bfd *abfd ATTRIBUTE_UNUSED;
252b5132	233	arelent *cache_ptr;
947216bf	234	Elf_Internal_Rela *dst;
252b5132 RH	235	{
	236	unsigned int r_type;
	237
	238	r_type = ELF32_R_TYPE (dst->r_info);
	239	BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
	240	cache_ptr->howto = &elf_d10v_howto_table[r_type];
	241	}
	242
	243	static asection *
1e2f5b6e AM	244	elf32_d10v_gc_mark_hook (sec, info, rel, h, sym)
	245	asection *sec;
	246	struct bfd_link_info *info ATTRIBUTE_UNUSED;
	247	Elf_Internal_Rela *rel;
	248	struct elf_link_hash_entry *h;
	249	Elf_Internal_Sym *sym;
252b5132 RH	250	{
	251	if (h != NULL)
	252	{
	253	switch (ELF32_R_TYPE (rel->r_info))
	254	{
	255	case R_D10V_GNU_VTINHERIT:
	256	case R_D10V_GNU_VTENTRY:
	257	break;
	258
	259	default:
	260	switch (h->root.type)
	261	{
	262	case bfd_link_hash_defined:
	263	case bfd_link_hash_defweak:
	264	return h->root.u.def.section;
	265
	266	case bfd_link_hash_common:
	267	return h->root.u.c.p->section;
e049a0de ILT	268
	269	default:
	270	break;
252b5132 RH	271	}
	272	}
	273	}
	274	else
1e2f5b6e AM	275	return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1e2f5b6e AM	276
252b5132 RH	277	return NULL;
	278	}
	279
b34976b6	280	static bfd_boolean
252b5132	281	elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47 ILT	282	bfd *abfd ATTRIBUTE_UNUSED;
	283	struct bfd_link_info *info ATTRIBUTE_UNUSED;
	284	asection *sec ATTRIBUTE_UNUSED;
	285	const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 RH	286	{
252b5132 RH	287	/* we don't use got and plt entries for d10v */
b34976b6	288	return TRUE;
252b5132 RH	289	}
	290
	291	/* Look through the relocs for a section during the first phase.
	292	Since we don't do .gots or .plts, we just need to consider the
	293	virtual table relocs for gc. */
a7c10850	294
b34976b6	295	static bfd_boolean
252b5132 RH	296	elf32_d10v_check_relocs (abfd, info, sec, relocs)
	297	bfd *abfd;
	298	struct bfd_link_info *info;
	299	asection *sec;
	300	const Elf_Internal_Rela *relocs;
	301	{
	302	Elf_Internal_Shdr *symtab_hdr;
	303	struct elf_link_hash_entry sym_hashes, sym_hashes_end;
	304	const Elf_Internal_Rela *rel;
	305	const Elf_Internal_Rela *rel_end;
a7c10850	306
1049f94e	307	if (info->relocatable)
b34976b6	308	return TRUE;
a7c10850	309
252b5132 RH	310	symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 RH	311	sym_hashes = elf_sym_hashes (abfd);
a7c10850	312	sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
252b5132 RH	313	if (!elf_bad_symtab (abfd))
252b5132 RH	314	sym_hashes_end -= symtab_hdr->sh_info;
a7c10850	315
252b5132 RH	316	rel_end = relocs + sec->reloc_count;
	317	for (rel = relocs; rel < rel_end; rel++)
	318	{
	319	struct elf_link_hash_entry *h;
	320	unsigned long r_symndx;
a7c10850	321
252b5132 RH	322	r_symndx = ELF32_R_SYM (rel->r_info);
	323	if (r_symndx < symtab_hdr->sh_info)
	324	h = NULL;
	325	else
	326	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
a7c10850	327
252b5132 RH	328	switch (ELF32_R_TYPE (rel->r_info))
	329	{
	330	/* This relocation describes the C++ object vtable hierarchy.
	331	Reconstruct it for later use during GC. */
	332	case R_D10V_GNU_VTINHERIT:
	333	if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6	334	return FALSE;
252b5132	335	break;
a7c10850	336
252b5132 RH	337	/* This relocation describes which C++ vtable entries are actually
	338	used. Record for later use during GC. */
	339	case R_D10V_GNU_VTENTRY:
	340	if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6	341	return FALSE;
252b5132 RH	342	break;
	343	}
	344	}
a7c10850	345
b34976b6	346	return TRUE;
252b5132 RH	347	}
	348
	349	/* Relocate a D10V ELF section. */
b34976b6	350	static bfd_boolean
252b5132 RH	351	elf32_d10v_relocate_section (output_bfd, info, input_bfd, input_section,
252b5132 RH	352	contents, relocs, local_syms, local_sections)
f8df10f4	353	bfd *output_bfd;
252b5132 RH	354	struct bfd_link_info *info;
	355	bfd *input_bfd;
	356	asection *input_section;
	357	bfd_byte *contents;
	358	Elf_Internal_Rela *relocs;
	359	Elf_Internal_Sym *local_syms;
	360	asection **local_sections;
	361	{
	362	Elf_Internal_Shdr *symtab_hdr;
	363	struct elf_link_hash_entry **sym_hashes;
	364	Elf_Internal_Rela rel, relend;
	365	const char *name;
	366
	367	symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
	368	sym_hashes = elf_sym_hashes (input_bfd);
	369
	370	rel = relocs;
	371	relend = relocs + input_section->reloc_count;
	372	for (; rel < relend; rel++)
	373	{
	374	int r_type;
	375	reloc_howto_type *howto;
	376	unsigned long r_symndx;
	377	Elf_Internal_Sym *sym;
	378	asection *sec;
	379	struct elf_link_hash_entry *h;
	380	bfd_vma relocation;
	381	bfd_reloc_status_type r;
	382
	383	r_symndx = ELF32_R_SYM (rel->r_info);
	384	r_type = ELF32_R_TYPE (rel->r_info);
	385
	386	if (r_type == R_D10V_GNU_VTENTRY
	387	\|\| r_type == R_D10V_GNU_VTINHERIT )
	388	continue;
	389
	390	howto = elf_d10v_howto_table + r_type;
	391
1049f94e	392	if (info->relocatable)
252b5132	393	{
1049f94e	394	/* This is a relocatable link. We don't have to change
252b5132 RH	395	anything, unless the reloc is against a section symbol,
	396	in which case we have to adjust according to where the
	397	section symbol winds up in the output section. */
	398	if (r_symndx < symtab_hdr->sh_info)
	399	{
	400	sym = local_syms + r_symndx;
	401	if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
	402	{
	403	sec = local_sections[r_symndx];
	404	rel->r_addend += sec->output_offset + sym->st_value;
	405	}
	406	}
	407
	408	continue;
	409	}
	410
	411	/* This is a final link. */
	412	h = NULL;
	413	sym = NULL;
	414	sec = NULL;
	415	if (r_symndx < symtab_hdr->sh_info)
	416	{
	417	sym = local_syms + r_symndx;
	418	sec = local_sections[r_symndx];
f8df10f4	419	relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
252b5132 RH	420	}
	421	else
	422	{
	423	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	424	while (h->root.type == bfd_link_hash_indirect
	425	\|\| h->root.type == bfd_link_hash_warning)
	426	h = (struct elf_link_hash_entry *) h->root.u.i.link;
	427	if (h->root.type == bfd_link_hash_defined
	428	\|\| h->root.type == bfd_link_hash_defweak)
	429	{
	430	sec = h->root.u.def.section;
	431	relocation = (h->root.u.def.value
	432	+ sec->output_section->vma
	433	+ sec->output_offset);
	434	}
	435	else if (h->root.type == bfd_link_hash_undefweak)
	436	relocation = 0;
	437	else
	438	{
	439	if (!((*info->callbacks->undefined_symbol)
	440	(info, h->root.root.string, input_bfd,
b34976b6 AM	441	input_section, rel->r_offset, TRUE)))
b34976b6 AM	442	return FALSE;
252b5132 RH	443	relocation = 0;
	444	}
	445	}
	446
	447	if (h != NULL)
	448	name = h->root.root.string;
	449	else
	450	{
	451	name = (bfd_elf_string_from_elf_section
	452	(input_bfd, symtab_hdr->sh_link, sym->st_name));
	453	if (name == NULL \|\| *name == '\0')
	454	name = bfd_section_name (input_bfd, sec);
	455	}
a7c10850	456
252b5132 RH	457	r = _bfd_final_link_relocate (howto, input_bfd, input_section,
	458	contents, rel->r_offset,
	459	relocation, rel->r_addend);
	460
	461	if (r != bfd_reloc_ok)
	462	{
	463	const char * msg = (const char *) 0;
	464
	465	switch (r)
	466	{
	467	case bfd_reloc_overflow:
	468	if (!((*info->callbacks->reloc_overflow)
	469	(info, name, howto->name, (bfd_vma) 0,
	470	input_bfd, input_section, rel->r_offset)))
b34976b6	471	return FALSE;
252b5132 RH	472	break;
	473
	474	case bfd_reloc_undefined:
	475	if (!((*info->callbacks->undefined_symbol)
	476	(info, name, input_bfd, input_section,
b34976b6 AM	477	rel->r_offset, TRUE)))
b34976b6 AM	478	return FALSE;
252b5132 RH	479	break;
	480
	481	case bfd_reloc_outofrange:
517662d4	482	msg = _("internal error: out of range error");
252b5132 RH	483	goto common_error;
	484
	485	case bfd_reloc_notsupported:
517662d4	486	msg = _("internal error: unsupported relocation error");
252b5132 RH	487	goto common_error;
	488
	489	case bfd_reloc_dangerous:
517662d4	490	msg = _("internal error: dangerous error");
252b5132 RH	491	goto common_error;
	492
	493	default:
517662d4	494	msg = _("internal error: unknown error");
252b5132 RH	495	/* fall through */
	496
	497	common_error:
	498	if (!((*info->callbacks->warning)
	499	(info, msg, name, input_bfd, input_section,
	500	rel->r_offset)))
b34976b6	501	return FALSE;
252b5132 RH	502	break;
	503	}
	504	}
	505	}
	506
b34976b6	507	return TRUE;
252b5132 RH	508	}
252b5132 RH	509	#define ELF_ARCH bfd_arch_d10v
aa4f99bb AO	510	#define ELF_MACHINE_CODE EM_D10V
aa4f99bb AO	511	#define ELF_MACHINE_ALT1 EM_CYGNUS_D10V
252b5132 RH	512	#define ELF_MAXPAGESIZE 0x1000
	513
	514	#define TARGET_BIG_SYM bfd_elf32_d10v_vec
	515	#define TARGET_BIG_NAME "elf32-d10v"
	516
	517	#define elf_info_to_howto 0
	518	#define elf_info_to_howto_rel d10v_info_to_howto_rel
	519	#define elf_backend_object_p 0
	520	#define elf_backend_final_write_processing 0
	521	#define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
	522	#define elf_backend_gc_sweep_hook elf32_d10v_gc_sweep_hook
	523	#define elf_backend_check_relocs elf32_d10v_check_relocs
	524	#define elf_backend_relocate_section elf32_d10v_relocate_section
	525	#define elf_backend_can_gc_sections 1
	526
	527	#include "elf32-target.h"