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

/* D10V-specific support for 32-bit ELF
   Copyright (C) 1996-2014 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 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

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

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

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

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

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

  /* A 16 bit absolute relocation.  */
  HOWTO (R_D10V_16,		/* Type.  */
	 0,			/* Rightshift.  */
	 1,			/* Size (0 = byte, 1 = short, 2 = long).  */
	 16,			/* Bitsize.  */
	 FALSE,			/* PC_relative.  */
	 0,			/* Bitpos.  */
	 complain_overflow_dont,/* Complain_on_overflow.  */
	 bfd_elf_generic_reloc, /* Special_function.  */
	 "R_D10V_16",		/* Name.  */
	 FALSE,			/* Partial_inplace.  */
	 0xffff,		/* Src_mask.  */
	 0xffff,		/* Dst_mask.  */
	 FALSE),		/* PCrel_offset.  */

  /* An 18 bit absolute relocation, right shifted 2.  */
  HOWTO (R_D10V_18,		/* Type.  */
	 2,			/* Rightshift.  */
	 1,			/* Size (0 = byte, 1 = short, 2 = long).  */
	 16,			/* Bitsize.  */
	 FALSE,			/* PC_relative.  */
	 0,			/* Bitpos.  */
	 complain_overflow_dont, /* Complain_on_overflow.  */
	 bfd_elf_generic_reloc, /* Special_function.  */
	 "R_D10V_18",		/* Name.  */
	 FALSE,			/* Partial_inplace.  */
	 0xffff,		/* Src_mask.  */
	 0xffff,		/* Dst_mask.  */
	 FALSE),		/* PCrel_offset.  */

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

  /* A 32 bit absolute relocation.  */
  HOWTO (R_D10V_32,		/* Type.  */
	 0,			/* Rightshift.  */
	 2,			/* Size (0 = byte, 1 = short, 2 = long).  */
	 32,			/* Bitsize.  */
	 FALSE,			/* PC_relative.  */
	 0,			/* Bitpos.  */
	 complain_overflow_dont,/* Complain_on_overflow.  */
	 bfd_elf_generic_reloc, /* Special_function.  */
	 "R_D10V_32",		/* Name.  */
	 FALSE,			/* Partial_inplace.  */
	 0xffffffff,		/* Src_mask.  */
	 0xffffffff,		/* Dst_mask.  */
	 FALSE),		/* PCrel_offset.  */

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

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

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

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

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

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

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

  return NULL;
}

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

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

  return NULL;
}

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

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

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

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

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

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

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

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

      r_symndx = ELF32_R_SYM (rel->r_info);
      if (r_symndx < symtab_hdr->sh_info)
        h = NULL;
      else
	{
	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	  while (h->root.type == bfd_link_hash_indirect
		 || h->root.type == bfd_link_hash_warning)
	    h = (struct elf_link_hash_entry *) h->root.u.i.link;

	  /* PR15323, ref flags aren't set for references in the same
	     object.  */
	  h->root.non_ir_ref = 1;
	}

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

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

  return TRUE;
}

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

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

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

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

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

/* Relocate a D10V ELF section.  */

static bfd_boolean
elf32_d10v_relocate_section (bfd *output_bfd,
			     struct bfd_link_info *info,
			     bfd *input_bfd,
			     asection *input_section,
			     bfd_byte *contents,
			     Elf_Internal_Rela *relocs,
			     Elf_Internal_Sym *local_syms,
			     asection **local_sections)
{
  Elf_Internal_Shdr *symtab_hdr;
  struct elf_link_hash_entry **sym_hashes;
  Elf_Internal_Rela *rel, *relend;
  const char *name;

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

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

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

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

      howto = elf_d10v_howto_table + r_type;
      h = NULL;
      sym = NULL;
      sec = NULL;
      if (r_symndx < symtab_hdr->sh_info)
	{
	  sym = local_syms + r_symndx;
	  sec = local_sections[r_symndx];
	  relocation = (sec->output_section->vma
			+ sec->output_offset
			+ sym->st_value);
	  if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
	      && ((sec->flags & SEC_MERGE) != 0
		  || (info->relocatable
		      && sec->output_offset != 0)))
	    {
	      bfd_vma addend;
	      bfd_byte *where = contents + rel->r_offset;

	      addend = extract_rel_addend (input_bfd, where, howto);

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

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

      if (sec != NULL && discarded_section (sec))
	RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
					 rel, 1, relend, howto, 0, contents);

      if (info->relocatable)
	continue;

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

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

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

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

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

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

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

	    case bfd_reloc_dangerous:
	      msg = _("internal error: dangerous error");
	      goto common_error;

	    default:
	      msg = _("internal error: unknown error");
	      /* fall through */

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

  return TRUE;
}
#define ELF_ARCH		bfd_arch_d10v
#define ELF_MACHINE_CODE	EM_D10V
#define ELF_MACHINE_ALT1	EM_CYGNUS_D10V
#define ELF_MAXPAGESIZE		0x1000

#define TARGET_BIG_SYM          d10v_elf32_vec
#define TARGET_BIG_NAME		"elf32-d10v"

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

#include "elf32-target.h"
Commit	Line	Data
252b5132	1	/* D10V-specific support for 32-bit ELF
4b95cf5c	2	Copyright (C) 1996-2014 Free Software Foundation, Inc.
252b5132 RH	3	Contributed by Martin Hunt (hunt@cygnus.com).
252b5132 RH	4
47b0e7ad	5	This file is part of BFD, the Binary File Descriptor library.
252b5132	6
47b0e7ad NC	7	This program is free software; you can redistribute it and/or modify
47b0e7ad NC	8	it under the terms of the GNU General Public License as published by
cd123cb7	9	the Free Software Foundation; either version 3 of the License, or
47b0e7ad	10	(at your option) any later version.
252b5132	11
47b0e7ad NC	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.
252b5132	16
47b0e7ad NC	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., 51 Franklin Street - Fifth Floor, Boston,
	20	MA 02110-1301, USA. */
252b5132	21
252b5132	22	#include "sysdep.h"
3db64b00	23	#include "bfd.h"
252b5132 RH	24	#include "libbfd.h"
252b5132 RH	25	#include "elf-bfd.h"
1b452ec6	26	#include "elf/d10v.h"
252b5132	27
917583ad	28	/* Use REL instead of RELA to save space. */
acf8aed4	29	#define USE_REL 1
252b5132	30
252b5132	31	static reloc_howto_type elf_d10v_howto_table[] =
47b0e7ad NC	32	{
	33	/* This reloc does nothing. */
	34	HOWTO (R_D10V_NONE, /* Type. */
	35	0, /* Rightshift. */
	36	2, /* Size (0 = byte, 1 = short, 2 = long). */
	37	32, /* Bitsize. */
	38	FALSE, /* PC_relative. */
	39	0, /* Bitpos. */
	40	complain_overflow_dont,/* Complain_on_overflow. */
	41	bfd_elf_generic_reloc, /* Special_function. */
	42	"R_D10V_NONE", /* Name. */
	43	FALSE, /* Partial_inplace. */
	44	0, /* Src_mask. */
	45	0, /* Dst_mask. */
	46	FALSE), /* PCrel_offset. */
	47
	48	/* An PC Relative 10-bit relocation, shifted by 2, right container. */
	49	HOWTO (R_D10V_10_PCREL_R, /* Type. */
	50	2, /* Rightshift. */
	51	2, /* Size (0 = byte, 1 = short, 2 = long). */
a7985d73	52	8, /* Bitsize. */
47b0e7ad NC	53	TRUE, /* PC_relative. */
47b0e7ad NC	54	0, /* Bitpos. */
a7985d73	55	complain_overflow_signed, /* Complain_on_overflow. */
47b0e7ad NC	56	bfd_elf_generic_reloc, /* Special_function. */
	57	"R_D10V_10_PCREL_R", /* Name. */
	58	FALSE, /* Partial_inplace. */
	59	0xff, /* Src_mask. */
	60	0xff, /* Dst_mask. */
	61	TRUE), /* PCrel_offset. */
	62
	63	/* An PC Relative 10-bit relocation, shifted by 2, left container. */
	64	HOWTO (R_D10V_10_PCREL_L, /* Type. */
	65	2, /* Rightshift. */
	66	2, /* Size (0 = byte, 1 = short, 2 = long). */
a7985d73	67	8, /* Bitsize. */
47b0e7ad NC	68	TRUE, /* PC_relative. */
47b0e7ad NC	69	15, /* Bitpos. */
a7985d73	70	complain_overflow_signed, /* Complain_on_overflow. */
47b0e7ad NC	71	bfd_elf_generic_reloc, /* Special_function. */
	72	"R_D10V_10_PCREL_L", /* Name. */
	73	FALSE, /* Partial_inplace. */
	74	0x07f8000, /* Src_mask. */
	75	0x07f8000, /* Dst_mask. */
	76	TRUE), /* PCrel_offset. */
	77
	78	/* A 16 bit absolute relocation. */
	79	HOWTO (R_D10V_16, /* Type. */
	80	0, /* Rightshift. */
	81	1, /* Size (0 = byte, 1 = short, 2 = long). */
	82	16, /* Bitsize. */
	83	FALSE, /* PC_relative. */
	84	0, /* Bitpos. */
	85	complain_overflow_dont,/* Complain_on_overflow. */
	86	bfd_elf_generic_reloc, /* Special_function. */
	87	"R_D10V_16", /* Name. */
	88	FALSE, /* Partial_inplace. */
	89	0xffff, /* Src_mask. */
	90	0xffff, /* Dst_mask. */
	91	FALSE), /* PCrel_offset. */
	92
	93	/* An 18 bit absolute relocation, right shifted 2. */
	94	HOWTO (R_D10V_18, /* Type. */
	95	2, /* Rightshift. */
	96	1, /* Size (0 = byte, 1 = short, 2 = long). */
	97	16, /* Bitsize. */
	98	FALSE, /* PC_relative. */
	99	0, /* Bitpos. */
	100	complain_overflow_dont, /* Complain_on_overflow. */
	101	bfd_elf_generic_reloc, /* Special_function. */
	102	"R_D10V_18", /* Name. */
	103	FALSE, /* Partial_inplace. */
	104	0xffff, /* Src_mask. */
	105	0xffff, /* Dst_mask. */
	106	FALSE), /* PCrel_offset. */
	107
	108	/* A relative 18 bit relocation, right shifted by 2. */
	109	HOWTO (R_D10V_18_PCREL, /* Type. */
	110	2, /* Rightshift. */
	111	2, /* Size (0 = byte, 1 = short, 2 = long). */
a7985d73	112	16, /* Bitsize. */
47b0e7ad NC	113	TRUE, /* PC_relative. */
47b0e7ad NC	114	0, /* Bitpos. */
a7985d73	115	complain_overflow_signed, /* Complain_on_overflow. */
47b0e7ad NC	116	bfd_elf_generic_reloc, /* Special_function. */
	117	"R_D10V_18_PCREL", /* Name. */
	118	FALSE, /* Partial_inplace. */
	119	0xffff, /* Src_mask. */
	120	0xffff, /* Dst_mask. */
	121	TRUE), /* PCrel_offset. */
	122
	123	/* A 32 bit absolute relocation. */
	124	HOWTO (R_D10V_32, /* Type. */
	125	0, /* Rightshift. */
	126	2, /* Size (0 = byte, 1 = short, 2 = long). */
	127	32, /* Bitsize. */
	128	FALSE, /* PC_relative. */
	129	0, /* Bitpos. */
	130	complain_overflow_dont,/* Complain_on_overflow. */
	131	bfd_elf_generic_reloc, /* Special_function. */
	132	"R_D10V_32", /* Name. */
	133	FALSE, /* Partial_inplace. */
	134	0xffffffff, /* Src_mask. */
	135	0xffffffff, /* Dst_mask. */
	136	FALSE), /* PCrel_offset. */
	137
	138	/* GNU extension to record C++ vtable hierarchy. */
	139	HOWTO (R_D10V_GNU_VTINHERIT, /* Type. */
	140	0, /* Rightshift. */
	141	2, /* Size (0 = byte, 1 = short, 2 = long). */
	142	0, /* Bitsize. */
	143	FALSE, /* PC_relative. */
	144	0, /* Bitpos. */
	145	complain_overflow_dont,/* Complain_on_overflow. */
	146	NULL, /* Special_function. */
	147	"R_D10V_GNU_VTINHERIT",/* Name. */
	148	FALSE, /* Partial_inplace. */
	149	0, /* Src_mask. */
	150	0, /* Dst_mask. */
	151	FALSE), /* PCrel_offset. */
	152
	153	/* GNU extension to record C++ vtable member usage. */
	154	HOWTO (R_D10V_GNU_VTENTRY, /* Type. */
	155	0, /* Rightshift. */
	156	2, /* Size (0 = byte, 1 = short, 2 = long). */
	157	0, /* Bitsize. */
	158	FALSE, /* PC_relative. */
	159	0, /* Bitpos. */
	160	complain_overflow_dont,/* Complain_on_overflow. */
	161	_bfd_elf_rel_vtable_reloc_fn, /* Special_function. */
	162	"R_D10V_GNU_VTENTRY", /* Name. */
	163	FALSE, /* Partial_inplace. */
	164	0, /* Src_mask. */
	165	0, /* Dst_mask. */
	166	FALSE), /* PCrel_offset. */
	167	};
252b5132 RH	168
	169	/* Map BFD reloc types to D10V ELF reloc types. */
	170
	171	struct d10v_reloc_map
47b0e7ad NC	172	{
	173	bfd_reloc_code_real_type bfd_reloc_val;
	174	unsigned char elf_reloc_val;
	175	};
917583ad NC	176
917583ad NC	177	static const struct d10v_reloc_map d10v_reloc_map[] =
47b0e7ad NC	178	{
	179	{ BFD_RELOC_NONE, R_D10V_NONE, },
	180	{ BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R },
	181	{ BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L },
	182	{ BFD_RELOC_16, R_D10V_16 },
	183	{ BFD_RELOC_D10V_18, R_D10V_18 },
	184	{ BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL },
	185	{ BFD_RELOC_32, R_D10V_32 },
	186	{ BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT },
	187	{ BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY },
	188	};
252b5132 RH	189
252b5132 RH	190	static reloc_howto_type *
47b0e7ad NC	191	bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
47b0e7ad NC	192	bfd_reloc_code_real_type code)
252b5132 RH	193	{
	194	unsigned int i;
	195
	196	for (i = 0;
	197	i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map);
	198	i++)
47b0e7ad NC	199	if (d10v_reloc_map[i].bfd_reloc_val == code)
47b0e7ad NC	200	return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val];
252b5132 RH	201
	202	return NULL;
	203	}
	204
157090f7 AM	205	static reloc_howto_type *
	206	bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	207	const char *r_name)
	208	{
	209	unsigned int i;
	210
	211	for (i = 0;
	212	i < sizeof (elf_d10v_howto_table) / sizeof (elf_d10v_howto_table[0]);
	213	i++)
	214	if (elf_d10v_howto_table[i].name != NULL
	215	&& strcasecmp (elf_d10v_howto_table[i].name, r_name) == 0)
	216	return &elf_d10v_howto_table[i];
	217
	218	return NULL;
	219	}
	220
252b5132 RH	221	/* Set the howto pointer for an D10V ELF reloc. */
	222
	223	static void
47b0e7ad NC	224	d10v_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
	225	arelent *cache_ptr,
	226	Elf_Internal_Rela *dst)
252b5132 RH	227	{
	228	unsigned int r_type;
	229
	230	r_type = ELF32_R_TYPE (dst->r_info);
	231	BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
	232	cache_ptr->howto = &elf_d10v_howto_table[r_type];
	233	}
	234
	235	static asection *
47b0e7ad	236	elf32_d10v_gc_mark_hook (asection *sec,
07adf181	237	struct bfd_link_info *info,
47b0e7ad NC	238	Elf_Internal_Rela *rel,
	239	struct elf_link_hash_entry *h,
	240	Elf_Internal_Sym *sym)
252b5132 RH	241	{
252b5132 RH	242	if (h != NULL)
07adf181	243	switch (ELF32_R_TYPE (rel->r_info))
252b5132 RH	244	{
	245	case R_D10V_GNU_VTINHERIT:
	246	case R_D10V_GNU_VTENTRY:
07adf181 AM	247	return NULL;
07adf181 AM	248	}
1e2f5b6e	249
07adf181	250	return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132 RH	251	}
	252
	253	/* Look through the relocs for a section during the first phase.
	254	Since we don't do .gots or .plts, we just need to consider the
	255	virtual table relocs for gc. */
a7c10850	256
b34976b6	257	static bfd_boolean
47b0e7ad NC	258	elf32_d10v_check_relocs (bfd *abfd,
	259	struct bfd_link_info *info,
	260	asection *sec,
	261	const Elf_Internal_Rela *relocs)
252b5132 RH	262	{
252b5132 RH	263	Elf_Internal_Shdr *symtab_hdr;
5582a088	264	struct elf_link_hash_entry **sym_hashes;
252b5132 RH	265	const Elf_Internal_Rela *rel;
252b5132 RH	266	const Elf_Internal_Rela *rel_end;
a7c10850	267
1049f94e	268	if (info->relocatable)
b34976b6	269	return TRUE;
a7c10850	270
252b5132 RH	271	symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 RH	272	sym_hashes = elf_sym_hashes (abfd);
a7c10850	273
252b5132 RH	274	rel_end = relocs + sec->reloc_count;
	275	for (rel = relocs; rel < rel_end; rel++)
	276	{
	277	struct elf_link_hash_entry *h;
	278	unsigned long r_symndx;
a7c10850	279
252b5132 RH	280	r_symndx = ELF32_R_SYM (rel->r_info);
	281	if (r_symndx < symtab_hdr->sh_info)
	282	h = NULL;
	283	else
973a3492 L	284	{
	285	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	286	while (h->root.type == bfd_link_hash_indirect
	287	\|\| h->root.type == bfd_link_hash_warning)
	288	h = (struct elf_link_hash_entry *) h->root.u.i.link;
81fbe831 AM	289
	290	/* PR15323, ref flags aren't set for references in the same
	291	object. */
	292	h->root.non_ir_ref = 1;
973a3492	293	}
a7c10850	294
252b5132 RH	295	switch (ELF32_R_TYPE (rel->r_info))
	296	{
	297	/* This relocation describes the C++ object vtable hierarchy.
	298	Reconstruct it for later use during GC. */
	299	case R_D10V_GNU_VTINHERIT:
c152c796	300	if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6	301	return FALSE;
252b5132	302	break;
a7c10850	303
252b5132 RH	304	/* This relocation describes which C++ vtable entries are actually
	305	used. Record for later use during GC. */
	306	case R_D10V_GNU_VTENTRY:
d17e0c6e JB	307	BFD_ASSERT (h != NULL);
	308	if (h != NULL
	309	&& !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6	310	return FALSE;
252b5132 RH	311	break;
	312	}
	313	}
a7c10850	314
b34976b6	315	return TRUE;
252b5132 RH	316	}
252b5132 RH	317
a2b0fe9d	318	static bfd_vma
47b0e7ad NC	319	extract_rel_addend (bfd *abfd,
	320	bfd_byte *where,
	321	reloc_howto_type *howto)
a2b0fe9d AM	322	{
	323	bfd_vma insn, val;
	324
	325	switch (howto->size)
	326	{
	327	case 0:
	328	insn = bfd_get_8 (abfd, where);
	329	break;
	330	case 1:
	331	insn = bfd_get_16 (abfd, where);
	332	break;
	333	case 2:
	334	insn = bfd_get_32 (abfd, where);
	335	break;
	336	default:
	337	abort ();
	338	}
	339
	340	val = (insn & howto->dst_mask) >> howto->bitpos << howto->rightshift;
	341	/* We should really be testing for signed addends here, but we don't
	342	have that info directly in the howto. */
	343	if (howto->pc_relative)
	344	{
	345	bfd_vma sign;
	346	sign = howto->dst_mask & (~howto->dst_mask >> 1 \| ~(-(bfd_vma) 1 >> 1));
	347	sign = sign >> howto->bitpos << howto->rightshift;
	348	val = (val ^ sign) - sign;
	349	}
	350	return val;
	351	}
	352
	353	static void
47b0e7ad NC	354	insert_rel_addend (bfd *abfd,
	355	bfd_byte *where,
	356	reloc_howto_type *howto,
	357	bfd_vma addend)
a2b0fe9d AM	358	{
	359	bfd_vma insn;
	360
	361	addend = (addend >> howto->rightshift << howto->bitpos) & howto->dst_mask;
	362	insn = ~howto->dst_mask;
	363	switch (howto->size)
	364	{
	365	case 0:
	366	insn &= bfd_get_8 (abfd, where);
	367	insn \|= addend;
	368	bfd_put_8 (abfd, insn, where);
	369	break;
	370	case 1:
	371	insn &= bfd_get_16 (abfd, where);
	372	insn \|= addend;
	373	bfd_put_16 (abfd, insn, where);
	374	break;
	375	case 2:
	376	insn &= bfd_get_32 (abfd, where);
	377	insn \|= addend;
	378	bfd_put_32 (abfd, insn, where);
	379	break;
	380	default:
	381	abort ();
	382	}
	383	}
	384
252b5132	385	/* Relocate a D10V ELF section. */
47b0e7ad	386
b34976b6	387	static bfd_boolean
47b0e7ad NC	388	elf32_d10v_relocate_section (bfd *output_bfd,
	389	struct bfd_link_info *info,
	390	bfd *input_bfd,
	391	asection *input_section,
	392	bfd_byte *contents,
	393	Elf_Internal_Rela *relocs,
	394	Elf_Internal_Sym *local_syms,
	395	asection **local_sections)
252b5132 RH	396	{
	397	Elf_Internal_Shdr *symtab_hdr;
	398	struct elf_link_hash_entry **sym_hashes;
	399	Elf_Internal_Rela rel, relend;
	400	const char *name;
	401
	402	symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
	403	sym_hashes = elf_sym_hashes (input_bfd);
	404
	405	rel = relocs;
	406	relend = relocs + input_section->reloc_count;
	407	for (; rel < relend; rel++)
	408	{
	409	int r_type;
	410	reloc_howto_type *howto;
	411	unsigned long r_symndx;
	412	Elf_Internal_Sym *sym;
	413	asection *sec;
	414	struct elf_link_hash_entry *h;
	415	bfd_vma relocation;
	416	bfd_reloc_status_type r;
	417
	418	r_symndx = ELF32_R_SYM (rel->r_info);
	419	r_type = ELF32_R_TYPE (rel->r_info);
	420
	421	if (r_type == R_D10V_GNU_VTENTRY
47b0e7ad	422	\|\| r_type == R_D10V_GNU_VTINHERIT)
252b5132 RH	423	continue;
	424
	425	howto = elf_d10v_howto_table + r_type;
252b5132 RH	426	h = NULL;
	427	sym = NULL;
	428	sec = NULL;
	429	if (r_symndx < symtab_hdr->sh_info)
	430	{
	431	sym = local_syms + r_symndx;
	432	sec = local_sections[r_symndx];
a2b0fe9d AM	433	relocation = (sec->output_section->vma
	434	+ sec->output_offset
	435	+ sym->st_value);
ab96bf03 AM	436	if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
	437	&& ((sec->flags & SEC_MERGE) != 0
	438	\|\| (info->relocatable
	439	&& sec->output_offset != 0)))
a2b0fe9d	440	{
a2b0fe9d AM	441	bfd_vma addend;
	442	bfd_byte *where = contents + rel->r_offset;
	443
	444	addend = extract_rel_addend (input_bfd, where, howto);
ab96bf03 AM	445
	446	if (info->relocatable)
	447	addend += sec->output_offset;
	448	else
	449	{
	450	asection *msec = sec;
	451	addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
	452	addend);
	453	addend -= relocation;
	454	addend += msec->output_section->vma + msec->output_offset;
	455	}
a2b0fe9d AM	456	insert_rel_addend (input_bfd, where, howto, addend);
a2b0fe9d AM	457	}
252b5132 RH	458	}
	459	else
	460	{
62d887d4	461	bfd_boolean unresolved_reloc, warned, ignored;
59c2e50f	462
b2a8e766 AM	463	RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
	464	r_symndx, symtab_hdr, sym_hashes,
	465	h, sec, relocation,
62d887d4	466	unresolved_reloc, warned, ignored);
252b5132 RH	467	}
252b5132 RH	468
dbaa2011	469	if (sec != NULL && discarded_section (sec))
e4067dbb	470	RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b	471	rel, 1, relend, howto, 0, contents);
b1e24c02	472
ab96bf03 AM	473	if (info->relocatable)
	474	continue;
	475
252b5132 RH	476	if (h != NULL)
	477	name = h->root.root.string;
	478	else
	479	{
	480	name = (bfd_elf_string_from_elf_section
	481	(input_bfd, symtab_hdr->sh_link, sym->st_name));
	482	if (name == NULL \|\| *name == '\0')
	483	name = bfd_section_name (input_bfd, sec);
	484	}
a7c10850	485
252b5132 RH	486	r = _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132 RH	487	contents, rel->r_offset,
a2b0fe9d	488	relocation, (bfd_vma) 0);
252b5132 RH	489
	490	if (r != bfd_reloc_ok)
	491	{
	492	const char * msg = (const char *) 0;
	493
	494	switch (r)
	495	{
	496	case bfd_reloc_overflow:
	497	if (!((*info->callbacks->reloc_overflow)
47b0e7ad	498	(info, (h ? &h->root : NULL), name, howto->name,
dfeffb9f L	499	(bfd_vma) 0, input_bfd, input_section,
dfeffb9f L	500	rel->r_offset)))
b34976b6	501	return FALSE;
252b5132 RH	502	break;
	503
	504	case bfd_reloc_undefined:
	505	if (!((*info->callbacks->undefined_symbol)
	506	(info, name, input_bfd, input_section,
b34976b6 AM	507	rel->r_offset, TRUE)))
b34976b6 AM	508	return FALSE;
252b5132 RH	509	break;
	510
	511	case bfd_reloc_outofrange:
517662d4	512	msg = _("internal error: out of range error");
252b5132 RH	513	goto common_error;
	514
	515	case bfd_reloc_notsupported:
517662d4	516	msg = _("internal error: unsupported relocation error");
252b5132 RH	517	goto common_error;
	518
	519	case bfd_reloc_dangerous:
517662d4	520	msg = _("internal error: dangerous error");
252b5132 RH	521	goto common_error;
	522
	523	default:
517662d4	524	msg = _("internal error: unknown error");
252b5132 RH	525	/* fall through */
	526
	527	common_error:
	528	if (!((*info->callbacks->warning)
	529	(info, msg, name, input_bfd, input_section,
	530	rel->r_offset)))
b34976b6	531	return FALSE;
252b5132 RH	532	break;
	533	}
	534	}
	535	}
	536
b34976b6	537	return TRUE;
252b5132 RH	538	}
252b5132 RH	539	#define ELF_ARCH bfd_arch_d10v
aa4f99bb AO	540	#define ELF_MACHINE_CODE EM_D10V
aa4f99bb AO	541	#define ELF_MACHINE_ALT1 EM_CYGNUS_D10V
252b5132 RH	542	#define ELF_MAXPAGESIZE 0x1000
252b5132 RH	543
6d00b590	544	#define TARGET_BIG_SYM d10v_elf32_vec
252b5132 RH	545	#define TARGET_BIG_NAME "elf32-d10v"
	546
	547	#define elf_info_to_howto 0
	548	#define elf_info_to_howto_rel d10v_info_to_howto_rel
	549	#define elf_backend_object_p 0
	550	#define elf_backend_final_write_processing 0
	551	#define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
252b5132 RH	552	#define elf_backend_check_relocs elf32_d10v_check_relocs
	553	#define elf_backend_relocate_section elf32_d10v_relocate_section
	554	#define elf_backend_can_gc_sections 1
	555
	556	#include "elf32-target.h"