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

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

   This file is part of BFD, the Binary File Descriptor library.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  return NULL;
}

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

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

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

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

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

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

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

  if (info->relocatable)
    return TRUE;

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

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

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

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

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

  return TRUE;
}

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

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

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

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

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

/* Relocate a D10V ELF section.  */

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

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

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

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

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

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

	      addend = extract_rel_addend (input_bfd, where, howto);

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

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

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

      if (info->relocatable)
	continue;

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

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

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

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

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

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

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

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

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

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

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

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

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

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