Add support for Motorola XGATE embedded CPU

1 files changed, 729 insertions, 0 deletions

diff --git a/bfd/elf32-xgate.c b/bfd/elf32-xgate.c
new file mode 100644
index 0000000..bd5ebc4
--- /dev/null
+++ b/bfd/elf32-xgate.c
@@ -0,0 +1,729 @@
+/* Freescale XGATE-specific support for 32-bit ELF
+   Copyright 2010, 2011, 2012
+   Free Software Foundation, Inc.
+   Contributed by Sean Keys(skeys@ipdatasys.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 "bfdlink.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf32-xgate.h"
+#include "elf/xgate.h"
+#include "opcode/xgate.h"
+#include "libiberty.h"
+
+/* Relocation functions.  */
+static reloc_howto_type *
+bfd_elf32_bfd_reloc_type_lookup (bfd *, bfd_reloc_code_real_type);
+static reloc_howto_type *
+bfd_elf32_bfd_reloc_name_lookup (bfd *, const char *);
+static void
+xgate_info_to_howto_rel (bfd *, arelent *, Elf_Internal_Rela *);
+static bfd_boolean
+xgate_elf_set_mach_from_flags (bfd *);
+static struct bfd_hash_entry *
+stub_hash_newfunc (struct bfd_hash_entry *, struct bfd_hash_table *,
+    const char *);
+static struct bfd_link_hash_table*
+xgate_elf_bfd_link_hash_table_create (bfd *);
+
+/* Use REL instead of RELA to save space */
+#define USE_REL	1
+
+static reloc_howto_type elf_xgate_howto_table[] =
+{
+  /* This reloc does nothing.  */
+  HOWTO (R_XGATE_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_XGATE_NONE", /* name */
+	 FALSE, /* partial_inplace */
+	 0, /* src_mask */
+	 0, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 8 bit absolute relocation.  */
+  HOWTO (R_XGATE_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_XGATE_8", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 8 bit PC-rel relocation.  */
+  HOWTO (R_XGATE_PCREL_8, /* type */
+	 0, /* rightshift */
+	 0, /* size (0 = byte, 1 = short, 2 = long) */
+	 8, /* bitsize */
+	 TRUE, /* pc_relative */
+	 0, /* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_XGATE_PCREL_8", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 TRUE), /* pcrel_offset */
+
+  /* A 16 bit absolute relocation.  */
+  HOWTO (R_XGATE_16, /* type */
+	 0, /* rightshift */
+	 1, /* size (0 = byte, 1 = short, 2 = long) */
+	 16, /* bitsize */
+	 FALSE, /* pc_relative */
+	 0, /* bitpos */
+	 complain_overflow_dont /*bitfield */, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_XGATE_16", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 32 bit absolute relocation.  This one is never used for the
+     code relocation.  It's used by gas for -gstabs generation.  */
+  HOWTO (R_XGATE_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_XGATE_32", /* name */
+	 FALSE, /* partial_inplace */
+	 0xffffffff, /* src_mask */
+	 0xffffffff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 16 bit PC-rel relocation.  */
+  HOWTO (R_XGATE_PCREL_16, /* type */
+	 0, /* rightshift */
+	 1, /* size (0 = byte, 1 = short, 2 = long) */
+	 16, /* bitsize */
+	 TRUE, /* pc_relative */
+	 0, /* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_XGATE_PCREL_16", /* name */
+	 FALSE, /* partial_inplace */
+	 0xffff, /* src_mask */
+	 0xffff, /* dst_mask */
+	 TRUE), /* pcrel_offset */
+
+  /* GNU extension to record C++ vtable hierarchy.  */
+  HOWTO (R_XGATE_GNU_VTINHERIT, /* type */
+	 0, /* rightshift */
+	 1, /* size (0 = byte, 1 = short, 2 = long) */
+	 0, /* bitsize */
+	 FALSE, /* pc_relative */
+	 0, /* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 NULL, /* special_function */
+	 "R_XGATE_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_XGATE_GNU_VTENTRY, /* type */
+	 0, /* rightshift */
+	 1, /* 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_XGATE_GNU_VTENTRY", /* name */
+	 FALSE, /* partial_inplace */
+	 0, /* src_mask */
+	 0, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 24 bit relocation.  */
+  HOWTO (R_XGATE_24, /* 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_XGATE_IMM8_LO", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 16-bit low relocation.  */
+  HOWTO (R_XGATE_LO16, /* type */
+	 8, /* 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_XGATE_IMM8_HI", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A page relocation.  */
+  HOWTO (R_XGATE_GPAGE, /* type */
+	 0, /* rightshift */
+	 0, /* size (0 = byte, 1 = short, 2 = long) */
+	 8, /* bitsize */
+	 FALSE, /* pc_relative */
+	 0, /* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 xgate_elf_special_reloc,/* special_function */
+	 "R_XGATE_GPAGE", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 9 bit absolute relocation.   */
+  HOWTO (R_XGATE_PCREL_9, /* type */
+	 0, /* rightshift */
+	 1, /* size (0 = byte, 1 = short, 2 = long) */
+	 9, /* bitsize */
+	 TRUE, /* pc_relative */
+	 0, /* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_XGATE_PCREL_9", /* name */
+	 FALSE, /* partial_inplace */
+	 0xffff, /* src_mask */
+	 0xffff, /* dst_mask */
+	 TRUE), /* pcrel_offset */
+
+  /* A 8 bit absolute relocation (upper address).  */
+  HOWTO (R_XGATE_PCREL_10, /* type */
+	 8, /* rightshift */
+	 0, /* size (0 = byte, 1 = short, 2 = long) */
+	 10, /* bitsize */
+	 TRUE, /* pc_relative */
+	 0, /* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 bfd_elf_generic_reloc, /* special_function */
+	 "R_XGATE_PCREL_10", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 TRUE), /* pcrel_offset */
+
+  /* A 8 bit absolute relocation.  */
+  HOWTO (R_XGATE_IMM8_LO, /* 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_XGATE_IMM8_LO", /* name */
+	 FALSE, /* partial_inplace */
+	 0xffff, /* src_mask */
+	 0xffff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 16 bit absolute relocation (upper address).  */
+  HOWTO (R_XGATE_IMM8_HI, /* type */
+	 8, /* 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_XGATE_IMM8_HI", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 3 bit absolute relocation.  */
+  HOWTO (R_XGATE_IMM3, /* type */
+	 8, /* 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_XGATE_IMM3", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 4 bit absolute relocation.  */
+  HOWTO (R_XGATE_IMM4, /* type */
+	 8, /* 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_XGATE_IMM4", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* A 5 bit absolute relocation.  */
+  HOWTO (R_XGATE_IMM5, /* type */
+	 8, /* 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_XGATE_IMM5", /* name */
+	 FALSE, /* partial_inplace */
+	 0x00ff, /* src_mask */
+	 0x00ff, /* dst_mask */
+	 FALSE), /* pcrel_offset */
+
+  /* Mark beginning of a jump instruction (any form).  */
+  HOWTO (R_XGATE_RL_JUMP, /* type */
+	 0, /* rightshift */
+	 1, /* size (0 = byte, 1 = short, 2 = long) */
+	 0, /* bitsize */
+	 FALSE, /* pc_relative */
+	 0, /* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 xgate_elf_ignore_reloc, /* special_function */
+	 "R_XGATE_RL_JUMP", /* name */
+	 TRUE, /* partial_inplace */
+	 0, /* src_mask */
+	 0, /* dst_mask */
+	 TRUE), /* pcrel_offset */
+
+  /* Mark beginning of Gcc relaxation group instruction.  */
+  HOWTO (R_XGATE_RL_GROUP, /* type */
+	 0, /* rightshift */
+	 1, /* size (0 = byte, 1 = short, 2 = long) */
+	 0, /* bitsize */
+	 FALSE, /* pc_relative */
+	 0, /* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 xgate_elf_ignore_reloc, /* special_function */
+	 "R_XGATE_RL_GROUP", /* name */
+	 TRUE, /* partial_inplace */
+	 0, /* src_mask */
+	 0, /* dst_mask */
+	 TRUE), /* pcrel_offset */
+};
+
+/* Map BFD reloc types to XGATE ELF reloc types.  */
+
+struct xgate_reloc_map
+{
+  bfd_reloc_code_real_type bfd_reloc_val;
+  unsigned char elf_reloc_val;
+};
+
+static const struct xgate_reloc_map xgate_reloc_map[] =
+{
+  {BFD_RELOC_NONE, R_XGATE_NONE},
+  {BFD_RELOC_8, R_XGATE_8},
+  {BFD_RELOC_8_PCREL, R_XGATE_PCREL_8},
+  {BFD_RELOC_16_PCREL, R_XGATE_PCREL_16},
+  {BFD_RELOC_16, R_XGATE_16},
+  {BFD_RELOC_32, R_XGATE_32},
+
+  {BFD_RELOC_VTABLE_INHERIT, R_XGATE_GNU_VTINHERIT},
+  {BFD_RELOC_VTABLE_ENTRY, R_XGATE_GNU_VTENTRY},
+
+  {BFD_RELOC_XGATE_LO16, R_XGATE_LO16},
+  {BFD_RELOC_XGATE_GPAGE, R_XGATE_GPAGE},
+  {BFD_RELOC_XGATE_24, R_XGATE_24},
+  {BFD_RELOC_XGATE_PCREL_9, R_XGATE_PCREL_9},
+  {BFD_RELOC_XGATE_PCREL_10,  R_XGATE_PCREL_10},
+  {BFD_RELOC_XGATE_IMM8_LO, R_XGATE_IMM8_LO},
+  {BFD_RELOC_XGATE_IMM8_HI, R_XGATE_IMM8_HI},
+  {BFD_RELOC_XGATE_IMM3, R_XGATE_IMM3},
+  {BFD_RELOC_XGATE_IMM4, R_XGATE_IMM4},
+  {BFD_RELOC_XGATE_IMM5, R_XGATE_IMM5},
+
+  {BFD_RELOC_XGATE_RL_JUMP, R_XGATE_RL_JUMP},
+  {BFD_RELOC_XGATE_RL_GROUP, R_XGATE_RL_GROUP},
+};
+
+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 < ARRAY_SIZE (xgate_reloc_map); i++)
+    if (xgate_reloc_map[i].bfd_reloc_val == code)
+      return &elf_xgate_howto_table[xgate_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 < ARRAY_SIZE (elf_xgate_howto_table); i++)
+    if (elf_xgate_howto_table[i].name != NULL
+        && strcasecmp (elf_xgate_howto_table[i].name, r_name) == 0)
+      return &elf_xgate_howto_table[i];
+
+  return NULL;
+}
+
+/* Set the howto pointer for an XGATE ELF reloc.  */
+
+static void
+xgate_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_XGATE_max);
+  cache_ptr->howto = &elf_xgate_howto_table[r_type];
+}
+
+/* Free the derived linker hash table.  */
+
+void
+xgate_elf_bfd_link_hash_table_free (struct bfd_link_hash_table *hash)
+{
+  struct xgate_elf_link_hash_table *ret =
+      (struct xgate_elf_link_hash_table *) hash;
+
+  bfd_hash_table_free (ret->stub_hash_table);
+  free (ret->stub_hash_table);
+  _bfd_generic_link_hash_table_free (hash);
+}
+
+/* Create a XGATE ELF linker hash table.  */
+
+static struct bfd_link_hash_table*
+xgate_elf_bfd_link_hash_table_create (bfd *abfd)
+{
+  struct xgate_elf_link_hash_table *ret;
+  bfd_size_type amt = sizeof(struct xgate_elf_link_hash_table);
+
+  ret = (struct xgate_elf_link_hash_table *) bfd_malloc (amt);
+  if (ret == (struct xgate_elf_link_hash_table *) NULL)
+    return NULL;
+
+  memset (ret, 0, amt);
+  if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
+      _bfd_elf_link_hash_newfunc, sizeof(struct elf_link_hash_entry),
+      XGATE_ELF_DATA))
+    {
+      free (ret);
+      return NULL;
+    }
+
+  /* Init the stub hash table too.  */
+  amt = sizeof(struct bfd_hash_table);
+  ret->stub_hash_table = (struct bfd_hash_table*) bfd_malloc (amt);
+  if (ret->stub_hash_table == NULL)
+    {
+      free (ret);
+      return NULL;
+    }
+
+  if (!bfd_hash_table_init (ret->stub_hash_table, stub_hash_newfunc,
+      sizeof(struct elf32_xgate_stub_hash_entry)))
+    return NULL;
+
+  ret->stub_bfd = NULL;
+  ret->stub_section = 0;
+  ret->add_stub_section = NULL;
+  ret->sym_cache.abfd = NULL;
+
+  return &ret->root.root;
+}
+
+static bfd_boolean
+xgate_elf_set_mach_from_flags (bfd *abfd ATTRIBUTE_UNUSED)
+{
+  return TRUE;
+}
+
+/* Specific sections:
+ - The .page0 is a data section that is mapped in [0x0000..0x00FF].
+   Page0 accesses are faster on the M68HC12.
+ - The .vectors is the section that represents the interrupt
+   vectors.
+ - The .xgate section is starts in 0xE08800 or as xgate sees it 0x0800. */
+static const struct bfd_elf_special_section elf32_xgate_special_sections[] =
+{
+  { STRING_COMMA_LEN (".eeprom"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+  { STRING_COMMA_LEN (".page0"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+  { STRING_COMMA_LEN (".softregs"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
+  { STRING_COMMA_LEN (".vectors"), 0, SHT_PROGBITS, SHF_ALLOC },
+/*{ STRING_COMMA_LEN (".xgate"),    0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+  TODO finish this implementation */
+  { NULL, 0, 0, 0, 0 }
+};
+
+struct xgate_scan_param
+{
+  struct xgate_page_info* pinfo;
+  bfd_boolean use_memory_banks;
+};
+
+/* Assorted hash table functions.  */
+
+/* Initialize an entry in the stub hash table.  */
+
+static struct bfd_hash_entry *
+stub_hash_newfunc (struct bfd_hash_entry *entry,
+		   struct bfd_hash_table *table ATTRIBUTE_UNUSED,
+		   const char *string ATTRIBUTE_UNUSED)
+{
+  return entry;
+}
+
+/* Hook called by the linker routine which adds symbols from an object
+   file. */
+
+bfd_boolean
+elf32_xgate_add_symbol_hook (bfd *abfd ATTRIBUTE_UNUSED,
+			     struct bfd_link_info *info ATTRIBUTE_UNUSED,
+			     Elf_Internal_Sym *sym ATTRIBUTE_UNUSED,
+			     const char **namep ATTRIBUTE_UNUSED,
+			     flagword *flagsp ATTRIBUTE_UNUSED,
+			     asection **secp ATTRIBUTE_UNUSED,
+			     bfd_vma *valp ATTRIBUTE_UNUSED)
+{
+  return TRUE;
+}
+
+/* External entry points for sizing and building linker stubs.  */
+
+/* Set up various things so that we can make a list of input sections
+   for each output section included in the link.  Returns -1 on error,
+   0 when no stubs will be needed, and 1 on success.  */
+
+int
+elf32_xgate_setup_section_lists (bfd *output_bfd ATTRIBUTE_UNUSED,
+				 struct bfd_link_info *info ATTRIBUTE_UNUSED)
+{
+  return 1;
+}
+
+/* Determine and set the size of the stub section for a final link.
+   The basic idea here is to examine all the relocations looking for
+   PC-relative calls to a target that is unreachable with any "9-bit PC-REL"
+   instruction.  */
+
+bfd_boolean
+elf32_xgate_size_stubs (bfd *output_bfd ATTRIBUTE_UNUSED,
+			bfd *stub_bfd ATTRIBUTE_UNUSED,
+			struct bfd_link_info *info ATTRIBUTE_UNUSED,
+			asection * (*add_stub_section) (const char*, asection*) ATTRIBUTE_UNUSED)
+{
+  return FALSE;
+}
+
+/* Build all the stubs associated with the current output file.  The
+   stubs are kept in a hash table attached to the main linker hash
+   table.  This function is called via xgateelf_finish in the
+   linker.  */
+
+bfd_boolean
+elf32_xgate_build_stubs (bfd *abfd ATTRIBUTE_UNUSED,
+			 struct bfd_link_info *info ATTRIBUTE_UNUSED)
+{
+  return TRUE;
+}
+
+void
+xgate_elf_get_bank_parameters (struct bfd_link_info *info ATTRIBUTE_UNUSED)
+{
+  return;
+}
+
+/* This function is used for relocs which are only used for relaxing,
+   which the linker should otherwise ignore.  */
+
+bfd_reloc_status_type
+xgate_elf_ignore_reloc (bfd *abfd ATTRIBUTE_UNUSED,
+			arelent *reloc_entry,
+			asymbol *symbol ATTRIBUTE_UNUSED,
+			void *data ATTRIBUTE_UNUSED,
+			asection *input_section,
+			bfd *output_bfd,
+			char **error_message ATTRIBUTE_UNUSED)
+{
+  if (output_bfd != NULL)
+    reloc_entry->address += input_section->output_offset;
+  return bfd_reloc_ok;
+}
+
+bfd_reloc_status_type
+xgate_elf_special_reloc (bfd *abfd ATTRIBUTE_UNUSED,
+			 arelent *reloc_entry ATTRIBUTE_UNUSED,
+			 asymbol *symbol ATTRIBUTE_UNUSED,
+			 void *data ATTRIBUTE_UNUSED,
+			 asection *input_section ATTRIBUTE_UNUSED,
+			 bfd *output_bfd ATTRIBUTE_UNUSED,
+			 char **error_message ATTRIBUTE_UNUSED)
+{
+  abort ();
+}
+
+/* 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.  */
+
+bfd_boolean
+elf32_xgate_check_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;
+}
+
+/* Relocate a XGATE/S12x ELF section.  */
+
+bfd_boolean
+elf32_xgate_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
+			      struct bfd_link_info *info ATTRIBUTE_UNUSED,
+			      bfd *input_bfd ATTRIBUTE_UNUSED,
+			      asection *input_section ATTRIBUTE_UNUSED,
+			      bfd_byte *contents ATTRIBUTE_UNUSED,
+			      Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED,
+			      Elf_Internal_Sym *local_syms ATTRIBUTE_UNUSED,
+			      asection **local_sections ATTRIBUTE_UNUSED)
+{
+  return TRUE;
+}
+
+/* Set and control ELF flags in ELF header.  */
+
+bfd_boolean
+_bfd_xgate_elf_set_private_flags (bfd *abfd ATTRIBUTE_UNUSED,
+				  flagword flags ATTRIBUTE_UNUSED)
+{
+  return TRUE;
+}
+
+/* Merge backend specific data from an object file to the output
+   object file when linking.  */
+
+bfd_boolean
+_bfd_xgate_elf_merge_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED,
+				       bfd *obfd ATTRIBUTE_UNUSED)
+{
+  return TRUE;
+}
+
+bfd_boolean
+_bfd_xgate_elf_print_private_bfd_data (bfd *abfd, void *ptr)
+{
+  FILE *file = (FILE *) ptr;
+
+  BFD_ASSERT (abfd != NULL && ptr != NULL);
+
+  /* Print normal ELF private data.  */
+  _bfd_elf_print_private_bfd_data (abfd, ptr);
+
+  /* xgettext:c-format */
+  fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
+
+  if (elf_elfheader (abfd)->e_flags & E_XGATE_I32)
+    fprintf (file, _("[abi=32-bit int, "));
+  else
+    fprintf (file, _("[abi=16-bit int, "));
+
+  if (elf_elfheader (abfd)->e_flags & E_XGATE_F64)
+    fprintf (file, _("64-bit double, "));
+  else
+    fprintf (file, _("32-bit double, "));
+  if (elf_elfheader (abfd)->e_flags & EF_XGATE_MACH)
+    fprintf (file, _("cpu=XGATE]"));
+  else
+    fprintf (file, _("error reading cpu type from elf private data"));
+  fputc ('\n', file);
+
+  return TRUE;
+}
+
+void
+elf32_xgate_post_process_headers (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *link_info ATTRIBUTE_UNUSED)
+{
+
+}
+
+#define ELF_ARCH                             bfd_arch_xgate
+#define ELF_MACHINE_CODE                     EM_XGATE
+#define ELF_TARGET_ID                        XGATE_ELF_DATA
+
+#define ELF_MAXPAGESIZE                      0x1000
+
+#define TARGET_BIG_SYM                       bfd_elf32_xgate_vec
+#define TARGET_BIG_NAME                      "elf32-xgate"
+
+#define elf_info_to_howto                    0
+#define elf_info_to_howto_rel                xgate_info_to_howto_rel
+#define elf_backend_check_relocs             elf32_xgate_check_relocs
+#define elf_backend_relocate_section         elf32_xgate_relocate_section
+#define elf_backend_object_p                 xgate_elf_set_mach_from_flags
+#define elf_backend_final_write_processing   0
+#define elf_backend_can_gc_sections          1
+#define elf_backend_special_sections         elf32_xgate_special_sections
+#define elf_backend_post_process_headers     elf32_xgate_post_process_headers
+#define elf_backend_add_symbol_hook          elf32_xgate_add_symbol_hook
+
+#define bfd_elf32_bfd_link_hash_table_create xgate_elf_bfd_link_hash_table_create
+#define bfd_elf32_bfd_link_hash_table_free   xgate_elf_bfd_link_hash_table_free
+#define bfd_elf32_bfd_merge_private_bfd_data _bfd_xgate_elf_merge_private_bfd_data
+#define bfd_elf32_bfd_set_private_flags      _bfd_xgate_elf_set_private_flags
+#define bfd_elf32_bfd_print_private_bfd_data _bfd_xgate_elf_print_private_bfd_data
+
+#define xgate_stub_hash_lookup(table, string, create, copy)	\
+    ((struct elf32_xgate_stub_hash_entry *) \
+        bfd_hash_lookup ((table), (string), (create), (copy)))
+
+#include "elf32-target.h"