[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 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;
	}

      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;

	  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
47b0e7ad NC	9	it under the terms of the GNU General Public License as published by
cd123cb7	10	the Free Software Foundation; either version 3 of the License, or
47b0e7ad	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	22
252b5132	23	#include "sysdep.h"
3db64b00	24	#include "bfd.h"
252b5132 RH	25	#include "libbfd.h"
252b5132 RH	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
157090f7 AM	206	static reloc_howto_type *
	207	bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	208	const char *r_name)
	209	{
	210	unsigned int i;
	211
	212	for (i = 0;
	213	i < sizeof (elf_d10v_howto_table) / sizeof (elf_d10v_howto_table[0]);
	214	i++)
	215	if (elf_d10v_howto_table[i].name != NULL
	216	&& strcasecmp (elf_d10v_howto_table[i].name, r_name) == 0)
	217	return &elf_d10v_howto_table[i];
	218
	219	return NULL;
	220	}
	221
252b5132 RH	222	/* Set the howto pointer for an D10V ELF reloc. */
	223
	224	static void
47b0e7ad NC	225	d10v_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
	226	arelent *cache_ptr,
	227	Elf_Internal_Rela *dst)
252b5132 RH	228	{
	229	unsigned int r_type;
	230
	231	r_type = ELF32_R_TYPE (dst->r_info);
	232	BFD_ASSERT (r_type < (unsigned int) R_D10V_max);
	233	cache_ptr->howto = &elf_d10v_howto_table[r_type];
	234	}
	235
	236	static asection *
47b0e7ad	237	elf32_d10v_gc_mark_hook (asection *sec,
07adf181	238	struct bfd_link_info *info,
47b0e7ad NC	239	Elf_Internal_Rela *rel,
	240	struct elf_link_hash_entry *h,
	241	Elf_Internal_Sym *sym)
252b5132 RH	242	{
252b5132 RH	243	if (h != NULL)
07adf181	244	switch (ELF32_R_TYPE (rel->r_info))
252b5132 RH	245	{
	246	case R_D10V_GNU_VTINHERIT:
	247	case R_D10V_GNU_VTENTRY:
07adf181 AM	248	return NULL;
07adf181 AM	249	}
1e2f5b6e	250
07adf181	251	return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
252b5132 RH	252	}
	253
	254	/* Look through the relocs for a section during the first phase.
	255	Since we don't do .gots or .plts, we just need to consider the
	256	virtual table relocs for gc. */
a7c10850	257
b34976b6	258	static bfd_boolean
47b0e7ad NC	259	elf32_d10v_check_relocs (bfd *abfd,
	260	struct bfd_link_info *info,
	261	asection *sec,
	262	const Elf_Internal_Rela *relocs)
252b5132 RH	263	{
252b5132 RH	264	Elf_Internal_Shdr *symtab_hdr;
5582a088	265	struct elf_link_hash_entry **sym_hashes;
252b5132 RH	266	const Elf_Internal_Rela *rel;
252b5132 RH	267	const Elf_Internal_Rela *rel_end;
a7c10850	268
1049f94e	269	if (info->relocatable)
b34976b6	270	return TRUE;
a7c10850	271
252b5132 RH	272	symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252b5132 RH	273	sym_hashes = elf_sym_hashes (abfd);
a7c10850	274
252b5132 RH	275	rel_end = relocs + sec->reloc_count;
	276	for (rel = relocs; rel < rel_end; rel++)
	277	{
	278	struct elf_link_hash_entry *h;
	279	unsigned long r_symndx;
a7c10850	280
252b5132 RH	281	r_symndx = ELF32_R_SYM (rel->r_info);
	282	if (r_symndx < symtab_hdr->sh_info)
	283	h = NULL;
	284	else
973a3492 L	285	{
	286	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	287	while (h->root.type == bfd_link_hash_indirect
	288	\|\| h->root.type == bfd_link_hash_warning)
	289	h = (struct elf_link_hash_entry *) h->root.u.i.link;
	290	}
a7c10850	291
252b5132 RH	292	switch (ELF32_R_TYPE (rel->r_info))
	293	{
	294	/* This relocation describes the C++ object vtable hierarchy.
	295	Reconstruct it for later use during GC. */
	296	case R_D10V_GNU_VTINHERIT:
c152c796	297	if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6	298	return FALSE;
252b5132	299	break;
a7c10850	300
252b5132 RH	301	/* This relocation describes which C++ vtable entries are actually
	302	used. Record for later use during GC. */
	303	case R_D10V_GNU_VTENTRY:
d17e0c6e JB	304	BFD_ASSERT (h != NULL);
	305	if (h != NULL
	306	&& !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6	307	return FALSE;
252b5132 RH	308	break;
	309	}
	310	}
a7c10850	311
b34976b6	312	return TRUE;
252b5132 RH	313	}
252b5132 RH	314
a2b0fe9d	315	static bfd_vma
47b0e7ad NC	316	extract_rel_addend (bfd *abfd,
	317	bfd_byte *where,
	318	reloc_howto_type *howto)
a2b0fe9d AM	319	{
	320	bfd_vma insn, val;
	321
	322	switch (howto->size)
	323	{
	324	case 0:
	325	insn = bfd_get_8 (abfd, where);
	326	break;
	327	case 1:
	328	insn = bfd_get_16 (abfd, where);
	329	break;
	330	case 2:
	331	insn = bfd_get_32 (abfd, where);
	332	break;
	333	default:
	334	abort ();
	335	}
	336
	337	val = (insn & howto->dst_mask) >> howto->bitpos << howto->rightshift;
	338	/* We should really be testing for signed addends here, but we don't
	339	have that info directly in the howto. */
	340	if (howto->pc_relative)
	341	{
	342	bfd_vma sign;
	343	sign = howto->dst_mask & (~howto->dst_mask >> 1 \| ~(-(bfd_vma) 1 >> 1));
	344	sign = sign >> howto->bitpos << howto->rightshift;
	345	val = (val ^ sign) - sign;
	346	}
	347	return val;
	348	}
	349
	350	static void
47b0e7ad NC	351	insert_rel_addend (bfd *abfd,
	352	bfd_byte *where,
	353	reloc_howto_type *howto,
	354	bfd_vma addend)
a2b0fe9d AM	355	{
	356	bfd_vma insn;
	357
	358	addend = (addend >> howto->rightshift << howto->bitpos) & howto->dst_mask;
	359	insn = ~howto->dst_mask;
	360	switch (howto->size)
	361	{
	362	case 0:
	363	insn &= bfd_get_8 (abfd, where);
	364	insn \|= addend;
	365	bfd_put_8 (abfd, insn, where);
	366	break;
	367	case 1:
	368	insn &= bfd_get_16 (abfd, where);
	369	insn \|= addend;
	370	bfd_put_16 (abfd, insn, where);
	371	break;
	372	case 2:
	373	insn &= bfd_get_32 (abfd, where);
	374	insn \|= addend;
	375	bfd_put_32 (abfd, insn, where);
	376	break;
	377	default:
	378	abort ();
	379	}
	380	}
	381
252b5132	382	/* Relocate a D10V ELF section. */
47b0e7ad	383
b34976b6	384	static bfd_boolean
47b0e7ad NC	385	elf32_d10v_relocate_section (bfd *output_bfd,
	386	struct bfd_link_info *info,
	387	bfd *input_bfd,
	388	asection *input_section,
	389	bfd_byte *contents,
	390	Elf_Internal_Rela *relocs,
	391	Elf_Internal_Sym *local_syms,
	392	asection **local_sections)
252b5132 RH	393	{
	394	Elf_Internal_Shdr *symtab_hdr;
	395	struct elf_link_hash_entry **sym_hashes;
	396	Elf_Internal_Rela rel, relend;
	397	const char *name;
	398
	399	symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
	400	sym_hashes = elf_sym_hashes (input_bfd);
	401
	402	rel = relocs;
	403	relend = relocs + input_section->reloc_count;
	404	for (; rel < relend; rel++)
	405	{
	406	int r_type;
	407	reloc_howto_type *howto;
	408	unsigned long r_symndx;
	409	Elf_Internal_Sym *sym;
	410	asection *sec;
	411	struct elf_link_hash_entry *h;
	412	bfd_vma relocation;
	413	bfd_reloc_status_type r;
	414
	415	r_symndx = ELF32_R_SYM (rel->r_info);
	416	r_type = ELF32_R_TYPE (rel->r_info);
	417
	418	if (r_type == R_D10V_GNU_VTENTRY
47b0e7ad	419	\|\| r_type == R_D10V_GNU_VTINHERIT)
252b5132 RH	420	continue;
	421
	422	howto = elf_d10v_howto_table + r_type;
252b5132 RH	423	h = NULL;
	424	sym = NULL;
	425	sec = NULL;
	426	if (r_symndx < symtab_hdr->sh_info)
	427	{
	428	sym = local_syms + r_symndx;
	429	sec = local_sections[r_symndx];
a2b0fe9d AM	430	relocation = (sec->output_section->vma
	431	+ sec->output_offset
	432	+ sym->st_value);
ab96bf03 AM	433	if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
	434	&& ((sec->flags & SEC_MERGE) != 0
	435	\|\| (info->relocatable
	436	&& sec->output_offset != 0)))
a2b0fe9d	437	{
a2b0fe9d AM	438	bfd_vma addend;
	439	bfd_byte *where = contents + rel->r_offset;
	440
	441	addend = extract_rel_addend (input_bfd, where, howto);
ab96bf03 AM	442
	443	if (info->relocatable)
	444	addend += sec->output_offset;
	445	else
	446	{
	447	asection *msec = sec;
	448	addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
	449	addend);
	450	addend -= relocation;
	451	addend += msec->output_section->vma + msec->output_offset;
	452	}
a2b0fe9d AM	453	insert_rel_addend (input_bfd, where, howto, addend);
a2b0fe9d AM	454	}
252b5132 RH	455	}
	456	else
	457	{
59c2e50f L	458	bfd_boolean unresolved_reloc, warned;
59c2e50f L	459
b2a8e766 AM	460	RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
	461	r_symndx, symtab_hdr, sym_hashes,
	462	h, sec, relocation,
	463	unresolved_reloc, warned);
252b5132 RH	464	}
252b5132 RH	465
ab96bf03	466	if (sec != NULL && elf_discarded_section (sec))
b1e24c02	467	{
ab96bf03 AM	468	/* For relocs against symbols from removed linkonce sections,
	469	or sections discarded by a linker script, we just want the
	470	section contents zeroed. Avoid any special processing. */
b1e24c02	471	_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
ab96bf03 AM	472	rel->r_info = 0;
ab96bf03 AM	473	rel->r_addend = 0;
b1e24c02 DJ	474	continue;
	475	}
	476
ab96bf03 AM	477	if (info->relocatable)
	478	continue;
	479
252b5132 RH	480	if (h != NULL)
	481	name = h->root.root.string;
	482	else
	483	{
	484	name = (bfd_elf_string_from_elf_section
	485	(input_bfd, symtab_hdr->sh_link, sym->st_name));
	486	if (name == NULL \|\| *name == '\0')
	487	name = bfd_section_name (input_bfd, sec);
	488	}
a7c10850	489
252b5132 RH	490	r = _bfd_final_link_relocate (howto, input_bfd, input_section,
252b5132 RH	491	contents, rel->r_offset,
a2b0fe9d	492	relocation, (bfd_vma) 0);
252b5132 RH	493
	494	if (r != bfd_reloc_ok)
	495	{
	496	const char * msg = (const char *) 0;
	497
	498	switch (r)
	499	{
	500	case bfd_reloc_overflow:
	501	if (!((*info->callbacks->reloc_overflow)
47b0e7ad	502	(info, (h ? &h->root : NULL), name, howto->name,
dfeffb9f L	503	(bfd_vma) 0, input_bfd, input_section,
dfeffb9f L	504	rel->r_offset)))
b34976b6	505	return FALSE;
252b5132 RH	506	break;
	507
	508	case bfd_reloc_undefined:
	509	if (!((*info->callbacks->undefined_symbol)
	510	(info, name, input_bfd, input_section,
b34976b6 AM	511	rel->r_offset, TRUE)))
b34976b6 AM	512	return FALSE;
252b5132 RH	513	break;
	514
	515	case bfd_reloc_outofrange:
517662d4	516	msg = _("internal error: out of range error");
252b5132 RH	517	goto common_error;
	518
	519	case bfd_reloc_notsupported:
517662d4	520	msg = _("internal error: unsupported relocation error");
252b5132 RH	521	goto common_error;
	522
	523	case bfd_reloc_dangerous:
517662d4	524	msg = _("internal error: dangerous error");
252b5132 RH	525	goto common_error;
	526
	527	default:
517662d4	528	msg = _("internal error: unknown error");
252b5132 RH	529	/* fall through */
	530
	531	common_error:
	532	if (!((*info->callbacks->warning)
	533	(info, msg, name, input_bfd, input_section,
	534	rel->r_offset)))
b34976b6	535	return FALSE;
252b5132 RH	536	break;
	537	}
	538	}
	539	}
	540
b34976b6	541	return TRUE;
252b5132 RH	542	}
252b5132 RH	543	#define ELF_ARCH bfd_arch_d10v
aa4f99bb AO	544	#define ELF_MACHINE_CODE EM_D10V
aa4f99bb AO	545	#define ELF_MACHINE_ALT1 EM_CYGNUS_D10V
252b5132 RH	546	#define ELF_MAXPAGESIZE 0x1000
	547
	548	#define TARGET_BIG_SYM bfd_elf32_d10v_vec
	549	#define TARGET_BIG_NAME "elf32-d10v"
	550
	551	#define elf_info_to_howto 0
	552	#define elf_info_to_howto_rel d10v_info_to_howto_rel
	553	#define elf_backend_object_p 0
	554	#define elf_backend_final_write_processing 0
	555	#define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook
252b5132 RH	556	#define elf_backend_check_relocs elf32_d10v_check_relocs
	557	#define elf_backend_relocate_section elf32_d10v_relocate_section
	558	#define elf_backend_can_gc_sections 1
	559
	560	#include "elf32-target.h"