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

/* D10V-specific support for 32-bit ELF
   Copyright 1996, 1998, 1999, 2000, 2001 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 *, Elf32_Internal_Rel *));
static asection * elf32_d10v_gc_mark_hook
  PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
	   struct elf_link_hash_entry *, Elf_Internal_Sym *));
static boolean elf32_d10v_gc_sweep_hook
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
	   const Elf_Internal_Rela *));
static boolean elf32_d10v_check_relocs
  PARAMS ((bfd *, struct bfd_link_info *, asection *,
	   const Elf_Internal_Rela *));
static 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

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_bitfield, /* 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) */
	   10,	                /* 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) */
	   10,	                /* 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) */
	   18,			/* 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) */
	   18,			/* 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_bitfield, /* 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;
     Elf32_Internal_Rel *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 (abfd, info, rel, h, sym)
       bfd *abfd;
       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
     {
       if (!(elf_bad_symtab (abfd)
           && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
         && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
                && sym->st_shndx != SHN_COMMON))
          {
            return bfd_section_from_elf_index (abfd, sym->st_shndx);
          }
      }
  return NULL;
}

static 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 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 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
917583ad	2	Copyright 1996, 1998, 1999, 2000, 2001 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
	30	PARAMS ((bfd , arelent , Elf32_Internal_Rel *));
917583ad NC	31	static asection * elf32_d10v_gc_mark_hook
	32	PARAMS ((bfd , struct bfd_link_info , Elf_Internal_Rela *,
	33	struct elf_link_hash_entry , Elf_Internal_Sym ));
	34	static boolean elf32_d10v_gc_sweep_hook
	35	PARAMS ((bfd , struct bfd_link_info , asection *,
	36	const Elf_Internal_Rela *));
	37	static boolean elf32_d10v_check_relocs
	38	PARAMS ((bfd , struct bfd_link_info , asection *,
	39	const Elf_Internal_Rela *));
	40	static boolean elf32_d10v_relocate_section
	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. */
252b5132 RH	46	#define USE_REL
252b5132 RH	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 */
	55	false, /* pc_relative */
	56	0, /* bitpos */
	57	complain_overflow_bitfield, /* complain_on_overflow */
	58	bfd_elf_generic_reloc, /* special_function */
	59	"R_D10V_NONE", /* name */
	60	false, /* partial_inplace */
	61	0, /* src_mask */
	62	0, /* dst_mask */
	63	false), /* pcrel_offset */
	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) */
	70	10, /* bitsize */
	71	true, /* pc_relative */
	72	0, /* bitpos */
	73	complain_overflow_bitfield, /* complain_on_overflow */
	74	bfd_elf_generic_reloc, /* special_function */
	75	"R_D10V_10_PCREL_R", /* name */
	76	false, /* partial_inplace */
	77	0xff, /* src_mask */
	78	0xff, /* dst_mask */
	79	true), /* pcrel_offset */
	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) */
	86	10, /* bitsize */
	87	true, /* pc_relative */
	88	15, /* bitpos */
	89	complain_overflow_bitfield, /* complain_on_overflow */
	90	bfd_elf_generic_reloc, /* special_function */
	91	"R_D10V_10_PCREL_L", /* name */
	92	false, /* partial_inplace */
	93	0x07f8000, /* src_mask */
	94	0x07f8000, /* dst_mask */
	95	true), /* pcrel_offset */
	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 */
	102	false, /* pc_relative */
	103	0, /* bitpos */
	104	complain_overflow_dont, /* complain_on_overflow */
	105	bfd_elf_generic_reloc, /* special_function */
	106	"R_D10V_16", /* name */
	107	false, /* partial_inplace */
	108	0xffff, /* src_mask */
	109	0xffff, /* dst_mask */
	110	false), /* pcrel_offset */
	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) */
116	18, /* bitsize */
117	false, /* pc_relative */
118	0, /* bitpos */
119	complain_overflow_dont, /* complain_on_overflow */
120	bfd_elf_generic_reloc, /* special_function */
121	"R_D10V_18", /* name */
122	false, /* partial_inplace */
123	0xffff, /* src_mask */
124	0xffff, /* dst_mask */
125	false), /* pcrel_offset */
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) */
131	18, /* bitsize */
132	true, /* pc_relative */
133	0, /* bitpos */
134	complain_overflow_signed, /* complain_on_overflow */
135	bfd_elf_generic_reloc, /* special_function */
136	"R_D10V_18_PCREL", /* name */
137	false, /* partial_inplace */
138	0xffff, /* src_mask */
139	0xffff, /* dst_mask */
140	true), /* pcrel_offset */
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 */
147	false, /* pc_relative */
148	0, /* bitpos */
149	complain_overflow_bitfield, /* complain_on_overflow */
150	bfd_elf_generic_reloc, /* special_function */
151	"R_D10V_32", /* name */
152	false, /* partial_inplace */
153	0xffffffff, /* src_mask */
154	0xffffffff, /* dst_mask */
155	false), /* pcrel_offset */
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 */
162	false, /* pc_relative */
163	0, /* bitpos */
164	complain_overflow_dont, /* complain_on_overflow */
165	NULL, /* special_function */
166	"R_D10V_GNU_VTINHERIT", /* name */
167	false, /* partial_inplace */
168	0, /* src_mask */
169	0, /* dst_mask */
170	false), /* pcrel_offset */
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 */
177	false, /* pc_relative */
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 */
182	false, /* partial_inplace */
183	0, /* src_mask */
184	0, /* dst_mask */
185	false), /* pcrel_offset */
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 RH	232	arelent *cache_ptr;
	233	Elf32_Internal_Rel *dst;
	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 *
	243	elf32_d10v_gc_mark_hook (abfd, info, rel, h, sym)
	244	bfd *abfd;
5f771d47	245	struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132 RH	246	Elf_Internal_Rela *rel;
	247	struct elf_link_hash_entry *h;
	248	Elf_Internal_Sym *sym;
	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
	274	{
	275	if (!(elf_bad_symtab (abfd)
	276	&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
	277	&& ! ((sym->st_shndx <= 0 \|\| sym->st_shndx >= SHN_LORESERVE)
	278	&& sym->st_shndx != SHN_COMMON))
	279	{
	280	return bfd_section_from_elf_index (abfd, sym->st_shndx);
	281	}
	282	}
	283	return NULL;
	284	}
	285
	286	static boolean
	287	elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs)
5f771d47 ILT	288	bfd *abfd ATTRIBUTE_UNUSED;
	289	struct bfd_link_info *info ATTRIBUTE_UNUSED;
	290	asection *sec ATTRIBUTE_UNUSED;
	291	const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
252b5132 RH	292	{
	293	/* we don't use got and plt entries for d10v */
	294	return true;
	295	}
	296
	297	/* Look through the relocs for a section during the first phase.
	298	Since we don't do .gots or .plts, we just need to consider the
	299	virtual table relocs for gc. */
a7c10850	300
252b5132 RH	301	static boolean
	302	elf32_d10v_check_relocs (abfd, info, sec, relocs)
	303	bfd *abfd;
	304	struct bfd_link_info *info;
	305	asection *sec;
	306	const Elf_Internal_Rela *relocs;
	307	{
	308	Elf_Internal_Shdr *symtab_hdr;
	309	struct elf_link_hash_entry sym_hashes, sym_hashes_end;
	310	const Elf_Internal_Rela *rel;
	311	const Elf_Internal_Rela *rel_end;
a7c10850	312
252b5132 RH	313	if (info->relocateable)
252b5132 RH	314	return true;
a7c10850	315
252b5132 RH	316	symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 RH	317	sym_hashes = elf_sym_hashes (abfd);
a7c10850	318	sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
252b5132 RH	319	if (!elf_bad_symtab (abfd))
252b5132 RH	320	sym_hashes_end -= symtab_hdr->sh_info;
a7c10850	321
252b5132 RH	322	rel_end = relocs + sec->reloc_count;
	323	for (rel = relocs; rel < rel_end; rel++)
	324	{
	325	struct elf_link_hash_entry *h;
	326	unsigned long r_symndx;
a7c10850	327
252b5132 RH	328	r_symndx = ELF32_R_SYM (rel->r_info);
	329	if (r_symndx < symtab_hdr->sh_info)
	330	h = NULL;
	331	else
	332	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
a7c10850	333
252b5132 RH	334	switch (ELF32_R_TYPE (rel->r_info))
	335	{
	336	/* This relocation describes the C++ object vtable hierarchy.
	337	Reconstruct it for later use during GC. */
	338	case R_D10V_GNU_VTINHERIT:
	339	if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
	340	return false;
	341	break;
a7c10850	342
252b5132 RH	343	/* This relocation describes which C++ vtable entries are actually
	344	used. Record for later use during GC. */
	345	case R_D10V_GNU_VTENTRY:
	346	if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
	347	return false;
	348	break;
	349	}
	350	}
a7c10850	351
252b5132 RH	352	return true;
	353	}
	354
	355	/* Relocate a D10V ELF section. */
	356	static boolean
	357	elf32_d10v_relocate_section (output_bfd, info, input_bfd, input_section,
	358	contents, relocs, local_syms, local_sections)
f8df10f4	359	bfd *output_bfd;
252b5132 RH	360	struct bfd_link_info *info;
	361	bfd *input_bfd;
	362	asection *input_section;
	363	bfd_byte *contents;
	364	Elf_Internal_Rela *relocs;
	365	Elf_Internal_Sym *local_syms;
	366	asection **local_sections;
	367	{
	368	Elf_Internal_Shdr *symtab_hdr;
	369	struct elf_link_hash_entry **sym_hashes;
	370	Elf_Internal_Rela rel, relend;
	371	const char *name;
	372
	373	symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
	374	sym_hashes = elf_sym_hashes (input_bfd);
	375
	376	rel = relocs;
	377	relend = relocs + input_section->reloc_count;
	378	for (; rel < relend; rel++)
	379	{
	380	int r_type;
	381	reloc_howto_type *howto;
	382	unsigned long r_symndx;
	383	Elf_Internal_Sym *sym;
	384	asection *sec;
	385	struct elf_link_hash_entry *h;
	386	bfd_vma relocation;
	387	bfd_reloc_status_type r;
	388
	389	r_symndx = ELF32_R_SYM (rel->r_info);
	390	r_type = ELF32_R_TYPE (rel->r_info);
	391
	392	if (r_type == R_D10V_GNU_VTENTRY
	393	\|\| r_type == R_D10V_GNU_VTINHERIT )
	394	continue;
	395
	396	howto = elf_d10v_howto_table + r_type;
	397
	398	if (info->relocateable)
	399	{
	400	/* This is a relocateable link. We don't have to change
	401	anything, unless the reloc is against a section symbol,
	402	in which case we have to adjust according to where the
	403	section symbol winds up in the output section. */
	404	if (r_symndx < symtab_hdr->sh_info)
	405	{
	406	sym = local_syms + r_symndx;
	407	if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
	408	{
	409	sec = local_sections[r_symndx];
	410	rel->r_addend += sec->output_offset + sym->st_value;
	411	}
	412	}
	413
	414	continue;
	415	}
	416
	417	/* This is a final link. */
	418	h = NULL;
	419	sym = NULL;
	420	sec = NULL;
	421	if (r_symndx < symtab_hdr->sh_info)
	422	{
	423	sym = local_syms + r_symndx;
424	sec = local_sections[r_symndx];
f8df10f4	425	relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
252b5132 RH	426	}
	427	else
	428	{
	429	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	430	while (h->root.type == bfd_link_hash_indirect
	431	\|\| h->root.type == bfd_link_hash_warning)
	432	h = (struct elf_link_hash_entry *) h->root.u.i.link;
	433	if (h->root.type == bfd_link_hash_defined
	434	\|\| h->root.type == bfd_link_hash_defweak)
	435	{
	436	sec = h->root.u.def.section;
	437	relocation = (h->root.u.def.value
	438	+ sec->output_section->vma
	439	+ sec->output_offset);
	440	}
	441	else if (h->root.type == bfd_link_hash_undefweak)
	442	relocation = 0;
	443	else
	444	{
	445	if (!((*info->callbacks->undefined_symbol)
	446	(info, h->root.root.string, input_bfd,
5cc7c785	447	input_section, rel->r_offset, true)))
252b5132 RH	448	return false;
	449	relocation = 0;
	450	}
	451	}
	452
	453	if (h != NULL)
	454	name = h->root.root.string;
	455	else
	456	{
	457	name = (bfd_elf_string_from_elf_section
	458	(input_bfd, symtab_hdr->sh_link, sym->st_name));
	459	if (name == NULL \|\| *name == '\0')
	460	name = bfd_section_name (input_bfd, sec);
	461	}
a7c10850	462
252b5132 RH	463	r = _bfd_final_link_relocate (howto, input_bfd, input_section,
	464	contents, rel->r_offset,
	465	relocation, rel->r_addend);
	466
	467	if (r != bfd_reloc_ok)
	468	{
	469	const char * msg = (const char *) 0;
	470
	471	switch (r)
	472	{
	473	case bfd_reloc_overflow:
	474	if (!((*info->callbacks->reloc_overflow)
	475	(info, name, howto->name, (bfd_vma) 0,
	476	input_bfd, input_section, rel->r_offset)))
	477	return false;
	478	break;
	479
	480	case bfd_reloc_undefined:
	481	if (!((*info->callbacks->undefined_symbol)
	482	(info, name, input_bfd, input_section,
5cc7c785	483	rel->r_offset, true)))
252b5132 RH	484	return false;
	485	break;
	486
	487	case bfd_reloc_outofrange:
	488	msg = _ ("internal error: out of range error");
	489	goto common_error;
	490
	491	case bfd_reloc_notsupported:
	492	msg = _ ("internal error: unsupported relocation error");
	493	goto common_error;
	494
	495	case bfd_reloc_dangerous:
	496	msg = _ ("internal error: dangerous error");
	497	goto common_error;
	498
	499	default:
	500	msg = _ ("internal error: unknown error");
	501	/* fall through */
	502
	503	common_error:
	504	if (!((*info->callbacks->warning)
	505	(info, msg, name, input_bfd, input_section,
	506	rel->r_offset)))
	507	return false;
	508	break;
	509	}
	510	}
	511	}
	512
	513	return true;
	514	}
	515	#define ELF_ARCH bfd_arch_d10v
aa4f99bb AO	516	#define ELF_MACHINE_CODE EM_D10V
aa4f99bb AO	517	#define ELF_MACHINE_ALT1 EM_CYGNUS_D10V
252b5132 RH	518	#define ELF_MAXPAGESIZE 0x1000
	519
	520	#define TARGET_BIG_SYM bfd_elf32_d10v_vec
	521	#define TARGET_BIG_NAME "elf32-d10v"
	522
	523	#define elf_info_to_howto 0
	524	#define elf_info_to_howto_rel d10v_info_to_howto_rel
	525	#define elf_backend_object_p 0
	526	#define elf_backend_final_write_processing 0
	527	#define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
	528	#define elf_backend_gc_sweep_hook elf32_d10v_gc_sweep_hook
	529	#define elf_backend_check_relocs elf32_d10v_check_relocs
	530	#define elf_backend_relocate_section elf32_d10v_relocate_section
	531	#define elf_backend_can_gc_sections 1
	532
	533	#include "elf32-target.h"