Add OpenRISC support

1 files changed, 653 insertions, 0 deletions

diff --git a/bfd/elf32-openrisc.c b/bfd/elf32-openrisc.c
new file mode 100644
index 0000000..a6c1a00
--- /dev/null
+++ b/bfd/elf32-openrisc.c
@@ -0,0 +1,653 @@
+/* OpenRISC-specific support for 32-bit ELF.
+   Copyright (C) 2001 Free Software Foundation, Inc.
+   Contributed by Johan Rydberg, jrydberg@opencores.org
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/openrisc.h"
+#include "libiberty.h"
+
+/* Forward declarations.  */
+
+static reloc_howto_type *openrisc_reloc_type_lookup
+  PARAMS ((bfd * , bfd_reloc_code_real_type));
+static void openrisc_info_to_howto_rela
+  PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
+static boolean openrisc_elf_relocate_section
+  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+	   Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
+static bfd_reloc_status_type openrisc_final_link_relocate
+  PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, 
+           Elf_Internal_Rela *, bfd_vma));
+static boolean openrisc_elf_gc_sweep_hook
+  PARAMS ((bfd *, struct bfd_link_info *, asection *, 
+           const Elf_Internal_Rela *));
+static asection *openrisc_elf_gc_mark_hook
+  PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
+	   struct elf_link_hash_entry *, Elf_Internal_Sym *));
+
+
+static reloc_howto_type openrisc_elf_howto_table[] =
+  {
+  /* This reloc does nothing.  */
+  HOWTO (R_OPENRISC_NONE,	/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_OPENRISC_NONE",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A PC relative 26 bit relocation, right shifted by 2.  */
+  HOWTO (R_OPENRISC_INSN_REL_26, /* type */
+	 2,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 26,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_OPENRISC_INSN_REL_26", /* name */
+	 false,			/* partial_inplace */
+	 0x00000000,		/* src_mask */
+	 0x03ffffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A absolute 26 bit relocation, right shifted by 2.  */
+  HOWTO (R_OPENRISC_INSN_ABS_26, /* type */
+	 2,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 26,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_OPENRISC_INSN_ABS_26", /* name */
+	 false,			/* partial_inplace */
+	 0x00000000,		/* src_mask */
+	 0x03ffffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  HOWTO (R_OPENRISC_LO_16_IN_INSN, /* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_OPENRISC_LO_16_IN_INSN", /* name */
+	 false,			/* partial_inplace */
+	 0x0000ffff,		/* src_mask */
+	 0x0000ffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  HOWTO (R_OPENRISC_HI_16_IN_INSN, /* type */
+	 16,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield,	/* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_OPENRISC_HI_16_IN_INSN",	/* name */
+	 false,			/* partial_inplace */
+	 0x0000ffff,		/* src_mask */
+	 0x0000ffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* An 8 bit absolute relocation.  */
+  HOWTO (R_OPENRISC_8,		/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 8,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_OPENRISC_8",	/* name */
+	 true,			/* partial_inplace */
+	 0x0000,		/* src_mask */
+	 0x00ff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 16 bit absolute relocation.  */
+  HOWTO (R_OPENRISC_16,		/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_OPENRISC_16",	/* name */
+	 true,			/* partial_inplace */
+	 0x00000000,		/* src_mask */
+	 0x0000ffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 32 bit absolute relocation.  */
+  HOWTO (R_OPENRISC_32,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_OPENRISC_32",	/* name */
+	 true,			/* partial_inplace */
+	 0x00000000,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* GNU extension to record C++ vtable hierarchy */
+  HOWTO (R_OPENRISC_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_OPENRISC_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_OPENRISC_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_OPENRISC_GNU_VTENTRY", /* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+};
+
+/* Map BFD reloc types to OpenRISC ELF reloc types.  */
+
+struct openrisc_reloc_map
+  {
+    bfd_reloc_code_real_type bfd_reloc_val;
+    unsigned int openrisc_reloc_val;
+  };
+
+static const struct openrisc_reloc_map openrisc_reloc_map[] =
+  {
+    { BFD_RELOC_NONE, 		R_OPENRISC_NONE },
+    { BFD_RELOC_32, 		R_OPENRISC_32 },
+    { BFD_RELOC_16, 		R_OPENRISC_16 },
+    { BFD_RELOC_8, 		R_OPENRISC_8 },
+    { BFD_RELOC_OPENRISC_REL_26,R_OPENRISC_INSN_REL_26 },
+    { BFD_RELOC_OPENRISC_ABS_26,R_OPENRISC_INSN_ABS_26 },
+    { BFD_RELOC_HI16, 		R_OPENRISC_HI_16_IN_INSN },
+    { BFD_RELOC_LO16, 		R_OPENRISC_LO_16_IN_INSN },
+    { BFD_RELOC_VTABLE_INHERIT,	R_OPENRISC_GNU_VTINHERIT },
+    { BFD_RELOC_VTABLE_ENTRY, 	R_OPENRISC_GNU_VTENTRY }
+  };
+
+static reloc_howto_type *
+openrisc_reloc_type_lookup (abfd, code)
+     bfd * abfd ATTRIBUTE_UNUSED;
+     bfd_reloc_code_real_type code;
+{
+  unsigned int i;
+
+  for (i = ARRAY_SIZE (openrisc_reloc_map); --i;)
+    if (openrisc_reloc_map[i].bfd_reloc_val == code)
+      return & openrisc_elf_howto_table[openrisc_reloc_map[i].
+				       openrisc_reloc_val];
+
+  return NULL;
+}
+
+/* Set the howto pointer for an OpenRISC ELF reloc.  */
+
+static void
+openrisc_info_to_howto_rela (abfd, cache_ptr, dst)
+     bfd * abfd ATTRIBUTE_UNUSED;
+     arelent * cache_ptr;
+     Elf32_Internal_Rela * dst;
+{
+  unsigned int r_type;
+
+  r_type = ELF32_R_TYPE (dst->r_info);
+  BFD_ASSERT (r_type < (unsigned int) R_OPENRISC_max);
+  cache_ptr->howto = & openrisc_elf_howto_table[r_type];
+}
+
+/* Perform a single relocation.  By default we use the standard BFD
+   routines, but a few relocs, we have to do them ourselves.  */
+
+static bfd_reloc_status_type
+openrisc_final_link_relocate (howto, input_bfd, input_section, contents, rel,
+			      relocation)
+     reloc_howto_type *howto;
+     bfd *input_bfd;
+     asection *input_section;
+     bfd_byte *contents;
+     Elf_Internal_Rela *rel;
+     bfd_vma relocation;
+{
+  bfd_reloc_status_type r = bfd_reloc_ok;
+
+  switch (howto->type)
+    {
+    case R_OPENRISC_LO_16_IN_INSN:
+      relocation &= 0xffff;
+      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+				    contents, rel->r_offset,
+				    relocation, rel->r_addend);
+      break;
+
+    default:
+      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+				    contents, rel->r_offset,
+				    relocation, rel->r_addend);
+    }
+
+  return r;
+}
+
+/* Relocate an OpenRISC ELF section.
+   There is some attempt to make this function usable for many architectures,
+   both USE_REL and USE_RELA ['twould be nice if such a critter existed],
+   if only to serve as a learning tool.
+
+   The RELOCATE_SECTION function is called by the new ELF backend linker
+   to handle the relocations for a section.
+
+   The relocs are always passed as Rela structures; if the section
+   actually uses Rel structures, the r_addend field will always be
+   zero.
+
+   This function is responsible for adjusting the section contents as
+   necessary, and (if using Rela relocs and generating a relocateable
+   output file) adjusting the reloc addend as necessary.
+
+   This function does not have to worry about setting the reloc
+   address or the reloc symbol index.
+
+   LOCAL_SYMS is a pointer to the swapped in local symbols.
+
+   LOCAL_SECTIONS is an array giving the section in the input file
+   corresponding to the st_shndx field of each local symbol.
+
+   The global hash table entry for the global symbols can be found
+   via elf_sym_hashes (input_bfd).
+
+   When generating relocateable output, this function must handle
+   STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
+   going to be the section symbol corresponding to the output
+   section, which means that the addend must be adjusted
+   accordingly.  */
+
+static boolean
+openrisc_elf_relocate_section (output_bfd, info, input_bfd, input_section,
+			       contents, relocs, local_syms, local_sections)
+     bfd *output_bfd ATTRIBUTE_UNUSED;
+     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;
+  Elf_Internal_Rela *relend;
+
+  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+  sym_hashes = elf_sym_hashes (input_bfd);
+  relend = relocs + input_section->reloc_count;
+
+  for (rel = relocs; rel < relend; rel++)
+    {
+      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;
+      const char *name = NULL;
+      int r_type;
+
+      r_type = ELF32_R_TYPE (rel->r_info);
+      r_symndx = ELF32_R_SYM (rel->r_info);
+
+      if (r_type == R_OPENRISC_GNU_VTINHERIT
+	  || r_type == R_OPENRISC_GNU_VTENTRY)
+	continue;
+
+      if (info->relocateable)
+	{
+	  /* This is a relocateable link.  We don't have to change
+	     anything, unless the reloc is against a section symbol,
+	     in which case we have to adjust according to where the
+	     section symbol winds up in the output section.  */
+	  if (r_symndx < symtab_hdr->sh_info)
+	    {
+	      sym = local_syms + r_symndx;
+
+	      if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+		{
+		  sec = local_sections[r_symndx];
+		  rel->r_addend += sec->output_offset + sym->st_value;
+		}
+	    }
+	  continue;
+	}
+
+      if ((unsigned int) r_type >
+	  (sizeof openrisc_elf_howto_table / sizeof (reloc_howto_type)))
+	abort ();
+
+      /* This is a final link.  */
+      howto = openrisc_elf_howto_table + ELF32_R_TYPE (rel->r_info);
+      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);
+
+	  name = bfd_elf_string_from_elf_section
+	    (input_bfd, symtab_hdr->sh_link, sym->st_name);
+	  name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
+	}
+      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;
+
+	  name = h->root.root.string;
+
+	  if (h->root.type == bfd_link_hash_defined
+	      || h->root.type == bfd_link_hash_defweak)
+	    {
+	      sec = h->root.u.def.section;
+	      relocation = (h->root.u.def.value
+			    + sec->output_section->vma + sec->output_offset);
+	    }
+	  else if (h->root.type == bfd_link_hash_undefweak)
+	    {
+	      relocation = 0;
+	    }
+	  else
+	    {
+	      if (!((*info->callbacks->undefined_symbol)
+		    (info, h->root.root.string, input_bfd,
+		     input_section, rel->r_offset, true)))
+		return false;
+	      relocation = 0;
+	    }
+	}
+
+      r = openrisc_final_link_relocate (howto, input_bfd, input_section,
+					contents, rel, relocation);
+
+      if (r != bfd_reloc_ok)
+	{
+	  const char *msg = (const char *) NULL;
+
+	  switch (r)
+	    {
+	    case bfd_reloc_overflow:
+	      r = info->callbacks->reloc_overflow
+		(info, name, howto->name, (bfd_vma) 0,
+		 input_bfd, input_section, rel->r_offset);
+	      break;
+
+	    case bfd_reloc_undefined:
+	      r = info->callbacks->undefined_symbol
+		(info, name, input_bfd, input_section, rel->r_offset, true);
+	      break;
+
+	    case bfd_reloc_outofrange:
+	      msg = _("internal error: out of range error");
+	      break;
+
+	    case bfd_reloc_notsupported:
+	      msg = _("internal error: unsupported relocation error");
+	      break;
+
+	    case bfd_reloc_dangerous:
+	      msg = _("internal error: dangerous relocation");
+	      break;
+
+	    default:
+	      msg = _("internal error: unknown error");
+	      break;
+	    }
+
+	  if (msg)
+	    r = info->callbacks->warning
+	      (info, msg, name, input_bfd, input_section, rel->r_offset);
+
+	  if (!r)
+	    return false;
+	}
+    }
+
+  return true;
+}
+
+/* Return the section that should be marked against GC for a given
+   relocation.  */
+
+static asection *
+openrisc_elf_gc_mark_hook (abfd, info, rel, h, sym)
+     bfd *abfd ATTRIBUTE_UNUSED;
+     struct bfd_link_info *info ATTRIBUTE_UNUSED;
+     Elf_Internal_Rela *rel ATTRIBUTE_UNUSED;
+     struct elf_link_hash_entry *h ATTRIBUTE_UNUSED;
+     Elf_Internal_Sym *sym ATTRIBUTE_UNUSED;
+{
+  if (h != NULL)
+    {
+      switch (ELF32_R_TYPE (rel->r_info))
+	{
+	case R_OPENRISC_GNU_VTINHERIT:
+	case R_OPENRISC_GNU_VTENTRY:
+	  break;
+
+	default:
+	  switch (h->root.type)
+	    {
+	    case bfd_link_hash_defined:
+	    case bfd_link_hash_defweak:
+	      return h->root.u.def.section;
+
+	    case bfd_link_hash_common:
+	      return h->root.u.c.p->section;
+
+	    default:
+	      break;
+	    }
+	}
+    }
+  else
+    {
+      if (!(elf_bad_symtab (abfd)
+	    && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
+	  && !((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
+	       && sym->st_shndx != SHN_COMMON))
+	{
+	  return bfd_section_from_elf_index (abfd, sym->st_shndx);
+	}
+    }
+
+  return NULL;
+}
+
+/* Update the got entry reference counts for the section being removed.  */
+
+static boolean
+openrisc_elf_gc_sweep_hook (abfd, info, sec, relocs)
+     bfd *abfd ATTRIBUTE_UNUSED;
+     struct bfd_link_info *info ATTRIBUTE_UNUSED;
+     asection *sec ATTRIBUTE_UNUSED;
+     const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
+{
+  return true;
+}
+
+/* Look through the relocs for a section during the first phase.
+   Since we don't do .gots or .plts, we just need to consider the
+   virtual table relocs for gc.  */
+
+static boolean
+openrisc_elf_check_relocs (abfd, info, sec, relocs)
+     bfd *abfd;
+     struct bfd_link_info *info;
+     asection *sec;
+     const Elf_Internal_Rela *relocs;
+{
+  Elf_Internal_Shdr *symtab_hdr;
+  struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
+  const Elf_Internal_Rela *rel;
+  const Elf_Internal_Rela *rel_end;
+
+  if (info->relocateable)
+    return true;
+
+  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+  sym_hashes = elf_sym_hashes (abfd);
+  sym_hashes_end =
+    sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
+  if (!elf_bad_symtab (abfd))
+    sym_hashes_end -= symtab_hdr->sh_info;
+
+  rel_end = relocs + sec->reloc_count;
+  for (rel = relocs; rel < rel_end; rel++)
+    {
+      struct elf_link_hash_entry *h;
+      unsigned long r_symndx;
+
+      r_symndx = ELF32_R_SYM (rel->r_info);
+      if (r_symndx < symtab_hdr->sh_info)
+	h = NULL;
+      else
+	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+
+      switch (ELF32_R_TYPE (rel->r_info))
+	{
+	  /* This relocation describes the C++ object vtable hierarchy.
+	     Reconstruct it for later use during GC.  */
+	case R_OPENRISC_GNU_VTINHERIT:
+	  if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
+	    return false;
+	  break;
+
+	  /* This relocation describes which C++ vtable entries are actually
+	     used.  Record for later use during GC.  */
+	case R_OPENRISC_GNU_VTENTRY:
+	  if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
+	    return false;
+	  break;
+	}
+    }
+
+  return true;
+}
+
+/* Set the right machine number.  */
+
+static boolean
+openrisc_elf_object_p (abfd)
+     bfd *abfd;
+{
+  switch (elf_elfheader (abfd)->e_flags & 0xf)
+    {
+    default:
+      (void) bfd_default_set_arch_mach (abfd, bfd_arch_openrisc, 0);
+      break;
+    }
+  return true;
+}
+
+/* Store the machine number in the flags field.  */
+
+static void
+openrisc_elf_final_write_processing (abfd, linker)
+     bfd *abfd;
+     boolean linker ATTRIBUTE_UNUSED;
+{
+  unsigned long val;
+
+  switch (bfd_get_mach (abfd))
+    {
+    default:
+      val = 0;
+      break;
+    }
+
+  elf_elfheader (abfd)->e_flags &= ~0xf;
+  elf_elfheader (abfd)->e_flags |= val;
+}
+
+
+#define ELF_ARCH			bfd_arch_openrisc
+#define ELF_MACHINE_CODE		EM_OPENRISC
+#define ELF_MAXPAGESIZE			0x1000
+
+#define TARGET_BIG_SYM			bfd_elf32_openrisc_vec
+#define TARGET_BIG_NAME			"elf32-openrisc"
+
+#define elf_info_to_howto_rel		NULL
+#define elf_info_to_howto		openrisc_info_to_howto_rela
+#define elf_backend_relocate_section	openrisc_elf_relocate_section
+#define elf_backend_gc_mark_hook	openrisc_elf_gc_mark_hook
+#define elf_backend_gc_sweep_hook	openrisc_elf_gc_sweep_hook
+#define elf_backend_check_relocs	openrisc_elf_check_relocs
+
+#define elf_backend_can_gc_sections	1
+
+#define bfd_elf32_bfd_reloc_type_lookup openrisc_reloc_type_lookup
+
+#define elf_backend_object_p                openrisc_elf_object_p
+#define elf_backend_final_write_processing  openrisc_elf_final_write_processing
+
+#include "elf32-target.h"