Add support for Tilera TILE-Gx processor.

Signed-off-by: Jeff Kenton <[email protected]>

8 files changed, 617 insertions, 2 deletions

diff --git a/backends/ChangeLog b/backends/ChangeLog
index 744d1d55..0d51e739 100644
--- a/backends/ChangeLog
+++ b/backends/ChangeLog
@@ -1,3 +1,17 @@
+2012-08-22  Jeff Kenton  <[email protected]>
+
+	* Makefile.am (modules): Add tilegx.
+	(libebl_pic): Add libebl_tilegx_pic.a.
+	(tilegx_SRCS): New variable.
+	(libebl_tilegx_pic_a_SOURCES): Likewise.
+	(am_libebl_tilegx_pic_a_OBJECTS): Likewise.
+	* tilegx_corenote.c: New file.
+	* tilegx_regs.c: New file.
+	* tilegx_reloc.def: New file.
+	* tilegx_init.c: New file.
+	* tilegx_retval.c: New file.
+	* tilegx_symbol.c: New file.
+
 2011-03-09  Mark Wielaard  <[email protected]>
 
 	* alpha_init.c (alpha_init): Initialize check_st_other_bits hook.
diff --git a/backends/Makefile.am b/backends/Makefile.am
index 3b34e880..982ff2a7 100644
--- a/backends/Makefile.am
+++ b/backends/Makefile.am
@@ -1,6 +1,7 @@
 ## Process this file with automake to create Makefile.in
 ##
 ## Copyright (C) 2000-2010 Red Hat, Inc.
+## Copyright (C) 2012 Tilera Corporation
 ## This file is part of elfutils.
 ##
 ## This file is free software; you can redistribute it and/or modify
@@ -31,11 +32,11 @@ INCLUDES += -I$(top_srcdir)/libebl -I$(top_srcdir)/libasm \
 	   -I$(top_srcdir)/libelf -I$(top_srcdir)/libdw
 
 
-modules = i386 sh x86_64 ia64 alpha arm sparc ppc ppc64 s390
+modules = i386 sh x86_64 ia64 alpha arm sparc ppc ppc64 s390 tilegx
 libebl_pic = libebl_i386_pic.a libebl_sh_pic.a libebl_x86_64_pic.a \
 	     libebl_ia64_pic.a libebl_alpha_pic.a libebl_arm_pic.a \
 	     libebl_sparc_pic.a libebl_ppc_pic.a libebl_ppc64_pic.a \
-	     libebl_s390_pic.a
+	     libebl_s390_pic.a libebl_tilegx_pic.a
 noinst_LIBRARIES = $(libebl_pic)
 noinst_DATA = $(libebl_pic:_pic.a=.so)
 
@@ -97,6 +98,11 @@ s390_SRCS = s390_init.c s390_symbol.c s390_regs.c s390_retval.c
 libebl_s390_pic_a_SOURCES = $(s390_SRCS)
 am_libebl_s390_pic_a_OBJECTS = $(s390_SRCS:.c=.os)
 
+tilegx_SRCS = tilegx_init.c tilegx_symbol.c tilegx_regs.c \
+              tilegx_retval.c tilegx_corenote.c
+libebl_tilegx_pic_a_SOURCES = $(tilegx_SRCS)
+am_libebl_tilegx_pic_a_OBJECTS = $(tilegx_SRCS:.c=.os)
+
 
 libebl_%.so libebl_%.map: libebl_%_pic.a $(libelf) $(libdw)
 	@rm -f $(@:.so=.map)
diff --git a/backends/tilegx_corenote.c b/backends/tilegx_corenote.c
new file mode 100644
index 00000000..be3e7dbf
--- /dev/null
+++ b/backends/tilegx_corenote.c
@@ -0,0 +1,64 @@
+/* TILE-Gx specific core note handling.
+   Copyright (C) 2012 Tilera Corporation
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * 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
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <elf.h>
+#include <inttypes.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <sys/time.h>
+
+#define BACKEND	tilegx_
+#include "libebl_CPU.h"
+
+static const Ebl_Register_Location prstatus_regs[] =
+  {
+    { .offset = 0, .regno = 0, .count = 56, .bits = 64 }, /* r0-r55 */
+    { .offset = 56 * 8, .regno = 64, .count = 1, .bits = 64 } /* pc */
+  };
+#define PRSTATUS_REGS_SIZE	(57 * 8)
+
+#define ULONG			uint64_t
+#define ALIGN_ULONG		8
+#define TYPE_ULONG		ELF_T_XWORD
+#define TYPE_LONG		ELF_T_SXWORD
+#define PID_T			int32_t
+#define	UID_T			uint32_t
+#define	GID_T			uint32_t
+#define ALIGN_PID_T		4
+#define ALIGN_UID_T		4
+#define ALIGN_GID_T		4
+#define TYPE_PID_T		ELF_T_SWORD
+#define TYPE_UID_T		ELF_T_WORD
+#define TYPE_GID_T		ELF_T_WORD
+
+#include "linux-core-note.c"
diff --git a/backends/tilegx_init.c b/backends/tilegx_init.c
new file mode 100644
index 00000000..858798bf
--- /dev/null
+++ b/backends/tilegx_init.c
@@ -0,0 +1,60 @@
+/* Initialization of TILE-Gx specific backend library.
+   Copyright (C) 2012 Tilera Corporation
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * 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
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#define BACKEND		tilegx_
+#define RELOC_PREFIX	R_TILEGX_
+#include "libebl_CPU.h"
+
+/* This defines the common reloc hooks based on tilegx_reloc.def.  */
+#include "common-reloc.c"
+
+const char *
+tilegx_init (elf, machine, eh, ehlen)
+     Elf *elf __attribute__ ((unused));
+     GElf_Half machine __attribute__ ((unused));
+     Ebl *eh;
+     size_t ehlen;
+{
+  /* Check whether the Elf_BH object has a sufficent size.  */
+  if (ehlen < sizeof (Ebl))
+    return NULL;
+
+  /* We handle it.  */
+  eh->name = "TILE-Gx";
+  tilegx_init_reloc (eh);
+  HOOK (eh, reloc_simple_type);
+  HOOK (eh, return_value_location);
+  HOOK (eh, register_info);
+  HOOK (eh, core_note);
+
+  return MODVERSION;
+}
diff --git a/backends/tilegx_regs.c b/backends/tilegx_regs.c
new file mode 100644
index 00000000..b1e17439
--- /dev/null
+++ b/backends/tilegx_regs.c
@@ -0,0 +1,129 @@
+/* Register names and numbers for TILE-Gx DWARF.
+   Copyright (C) 2012 Tilera Corporation
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * 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
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <dwarf.h>
+
+#define BACKEND tilegx_
+#include "libebl_CPU.h"
+
+ssize_t
+tilegx_register_info (Ebl *ebl __attribute__ ((unused)),
+		    int regno, char *name, size_t namelen,
+		    const char **prefix, const char **setname,
+		    int *bits, int *type)
+{
+  if (name == NULL)
+    return 65;
+
+  if (regno < 0 || regno > 64 || namelen < 5)
+    return -1;
+
+  *prefix = "";
+  *setname = "integer";
+  *bits = 64;
+
+  switch (regno)
+    {
+    case 0 ... 9:
+      *type = DW_ATE_signed;
+      name[0] = 'r';
+      name[1] = regno + '0';
+      namelen = 2;
+      break;
+
+    case 10 ... 52:
+      *type = DW_ATE_signed;
+      name[0] = 'r';
+      name[1] = regno / 10 + '0';
+      name[2] = regno % 10 + '0';
+      namelen = 3;
+      break;
+
+    case 53:
+      *type = DW_ATE_address;
+      return stpcpy (name, "tp") + 1 - name;
+
+    case 54:
+      *type = DW_ATE_address;
+      return stpcpy (name, "sp") + 1 - name;
+
+    case 55:
+      *type = DW_ATE_address;
+      return stpcpy (name, "lr") + 1 - name;
+
+    case 56:
+      *type = DW_ATE_unsigned;
+      return stpcpy (name, "sn") + 1 - name;
+
+    case 57:
+      *type = DW_ATE_unsigned;
+      return stpcpy (name, "idn0") + 1 - name;
+
+    case 58:
+      *type = DW_ATE_unsigned;
+      return stpcpy (name, "idn1") + 1 - name;
+
+    case 59:
+      *type = DW_ATE_unsigned;
+      return stpcpy (name, "udn0") + 1 - name;
+
+    case 60:
+      *type = DW_ATE_unsigned;
+      return stpcpy (name, "udn1") + 1 - name;
+
+    case 61:
+      *type = DW_ATE_unsigned;
+      return stpcpy (name, "udn2") + 1 - name;
+
+    case 62:
+      *type = DW_ATE_unsigned;
+      return stpcpy (name, "udn3") + 1 - name;
+
+    case 63:
+      *type = DW_ATE_unsigned;
+      return stpcpy (name, "zero") + 1 - name;
+
+    case 64:
+      *type = DW_ATE_address;
+      return stpcpy (name, "pc") + 1 - name;
+
+    /* Can't happen.  */
+    default:
+      *setname = NULL;
+      return 0;
+    }
+
+  name[namelen++] = '\0';
+  return namelen;
+}
diff --git a/backends/tilegx_reloc.def b/backends/tilegx_reloc.def
new file mode 100644
index 00000000..9736286e
--- /dev/null
+++ b/backends/tilegx_reloc.def
@@ -0,0 +1,120 @@
+/* List the relocation types for tilegx.  -*- C -*-
+   Copyright (C) 2012 Tilera Corporation
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * 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
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+/*	    NAME,			REL|EXEC|DYN	*/
+
+RELOC_TYPE (NONE,			0)
+RELOC_TYPE (64,				REL|EXEC|DYN)
+RELOC_TYPE (32,				REL|EXEC|DYN)
+RELOC_TYPE (16,				REL|EXEC|DYN)
+RELOC_TYPE (8,				REL|EXEC|DYN)
+RELOC_TYPE (64_PCREL,			REL)
+RELOC_TYPE (32_PCREL,			REL)
+RELOC_TYPE (16_PCREL,			REL)
+RELOC_TYPE (8_PCREL,			REL)
+RELOC_TYPE (HW0,			REL)
+RELOC_TYPE (HW1,			REL)
+RELOC_TYPE (HW2,			REL)
+RELOC_TYPE (HW3,			REL)
+RELOC_TYPE (HW0_LAST,			REL)
+RELOC_TYPE (HW1_LAST,			REL)
+RELOC_TYPE (HW2_LAST,			REL)
+RELOC_TYPE (COPY,			EXEC)
+RELOC_TYPE (GLOB_DAT,			EXEC|DYN)
+RELOC_TYPE (JMP_SLOT,			EXEC|DYN)
+RELOC_TYPE (RELATIVE,			EXEC|DYN)
+RELOC_TYPE (BROFF_X1,			REL)
+RELOC_TYPE (JUMPOFF_X1,			REL)
+RELOC_TYPE (JUMPOFF_X1_PLT,		REL)
+RELOC_TYPE (IMM8_X0,			REL)
+RELOC_TYPE (IMM8_Y0,			REL)
+RELOC_TYPE (IMM8_X1,			REL)
+RELOC_TYPE (IMM8_Y1,			REL)
+RELOC_TYPE (DEST_IMM8_X1,		REL)
+RELOC_TYPE (MT_IMM14_X1,		REL)
+RELOC_TYPE (MF_IMM14_X1,		REL)
+RELOC_TYPE (MMSTART_X0,			REL)
+RELOC_TYPE (MMEND_X0,			REL)
+RELOC_TYPE (SHAMT_X0,			REL)
+RELOC_TYPE (SHAMT_X1,			REL)
+RELOC_TYPE (SHAMT_Y0,			REL)
+RELOC_TYPE (SHAMT_Y1,			REL)
+RELOC_TYPE (IMM16_X0_HW0,		REL)
+RELOC_TYPE (IMM16_X1_HW0,		REL)
+RELOC_TYPE (IMM16_X0_HW1,		REL)
+RELOC_TYPE (IMM16_X1_HW1,		REL)
+RELOC_TYPE (IMM16_X0_HW2,		REL)
+RELOC_TYPE (IMM16_X1_HW2,		REL)
+RELOC_TYPE (IMM16_X0_HW3,		REL)
+RELOC_TYPE (IMM16_X1_HW3,		REL)
+RELOC_TYPE (IMM16_X0_HW0_LAST,		REL)
+RELOC_TYPE (IMM16_X1_HW0_LAST,		REL)
+RELOC_TYPE (IMM16_X0_HW1_LAST,		REL)
+RELOC_TYPE (IMM16_X1_HW1_LAST,		REL)
+RELOC_TYPE (IMM16_X0_HW2_LAST,		REL)
+RELOC_TYPE (IMM16_X1_HW2_LAST,		REL)
+RELOC_TYPE (IMM16_X0_HW0_PCREL,		REL)
+RELOC_TYPE (IMM16_X1_HW0_PCREL,		REL)
+RELOC_TYPE (IMM16_X0_HW1_PCREL,		REL)
+RELOC_TYPE (IMM16_X1_HW1_PCREL,		REL)
+RELOC_TYPE (IMM16_X0_HW2_PCREL,		REL)
+RELOC_TYPE (IMM16_X1_HW2_PCREL,		REL)
+RELOC_TYPE (IMM16_X0_HW3_PCREL,		REL)
+RELOC_TYPE (IMM16_X1_HW3_PCREL,		REL)
+RELOC_TYPE (IMM16_X0_HW0_LAST_PCREL,	REL)
+RELOC_TYPE (IMM16_X1_HW0_LAST_PCREL,	REL)
+RELOC_TYPE (IMM16_X0_HW1_LAST_PCREL,	REL)
+RELOC_TYPE (IMM16_X1_HW1_LAST_PCREL,	REL)
+RELOC_TYPE (IMM16_X0_HW2_LAST_PCREL,	REL)
+RELOC_TYPE (IMM16_X1_HW2_LAST_PCREL,	REL)
+RELOC_TYPE (IMM16_X0_HW0_GOT,		REL)
+RELOC_TYPE (IMM16_X1_HW0_GOT,		REL)
+RELOC_TYPE (IMM16_X0_HW0_LAST_GOT,	REL)
+RELOC_TYPE (IMM16_X1_HW0_LAST_GOT,	REL)
+RELOC_TYPE (IMM16_X0_HW1_LAST_GOT,	REL)
+RELOC_TYPE (IMM16_X1_HW1_LAST_GOT,	REL)
+RELOC_TYPE (IMM16_X0_HW0_TLS_GD,	REL)
+RELOC_TYPE (IMM16_X1_HW0_TLS_GD,	REL)
+RELOC_TYPE (IMM16_X0_HW0_LAST_TLS_GD,	REL)
+RELOC_TYPE (IMM16_X1_HW0_LAST_TLS_GD,	REL)
+RELOC_TYPE (IMM16_X0_HW1_LAST_TLS_GD,	REL)
+RELOC_TYPE (IMM16_X1_HW1_LAST_TLS_GD,	REL)
+RELOC_TYPE (IMM16_X0_HW0_TLS_IE,	REL)
+RELOC_TYPE (IMM16_X1_HW0_TLS_IE,	REL)
+RELOC_TYPE (IMM16_X0_HW0_LAST_TLS_IE,	REL)
+RELOC_TYPE (IMM16_X1_HW0_LAST_TLS_IE,	REL)
+RELOC_TYPE (IMM16_X0_HW1_LAST_TLS_IE,	REL)
+RELOC_TYPE (IMM16_X1_HW1_LAST_TLS_IE,	REL)
+RELOC_TYPE (TLS_DTPMOD64,		EXEC|DYN)
+RELOC_TYPE (TLS_DTPOFF64,		EXEC|DYN)
+RELOC_TYPE (TLS_TPOFF64,		EXEC|DYN)
+RELOC_TYPE (TLS_DTPMOD32,		EXEC|DYN)
+RELOC_TYPE (TLS_DTPOFF32,		EXEC|DYN)
+RELOC_TYPE (TLS_TPOFF32,		EXEC|DYN)
+RELOC_TYPE (GNU_VTINHERIT,		REL)
+RELOC_TYPE (GNU_VTENTRY,		REL)
diff --git a/backends/tilegx_retval.c b/backends/tilegx_retval.c
new file mode 100644
index 00000000..fd4feef3
--- /dev/null
+++ b/backends/tilegx_retval.c
@@ -0,0 +1,165 @@
+/* Function return value location for Linux/TILE-Gx ABI.
+   Copyright (C) 2012 Tilera Corporation
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * 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
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <assert.h>
+#include <dwarf.h>
+
+#define BACKEND tilegx_
+#include "libebl_CPU.h"
+
+
+/* r0.  */
+static const Dwarf_Op loc_intreg[] =
+  {
+    { .atom = DW_OP_reg0 }
+  };
+#define nloc_intreg	1
+
+/* The return value is a structure and is actually stored in stack space
+   passed in a hidden argument by the caller.  But, the compiler
+   helpfully returns the address of that space in r0.  */
+static const Dwarf_Op loc_aggregate[] =
+  {
+    { .atom = DW_OP_breg0, .number = 0 }
+  };
+#define nloc_aggregate 1
+
+int
+tilegx_return_value_location (Dwarf_Die *functypedie, const Dwarf_Op **locp)
+{
+  /* Start with the function's type, and get the DW_AT_type attribute,
+     which is the type of the return value.  */
+
+  Dwarf_Attribute attr_mem;
+  Dwarf_Attribute *attr = dwarf_attr_integrate (functypedie, DW_AT_type,
+						&attr_mem);
+  if (attr == NULL)
+    /* The function has no return value, like a `void' function in C.  */
+    return 0;
+
+  Dwarf_Die die_mem;
+  Dwarf_Die *typedie = dwarf_formref_die (attr, &die_mem);
+  int tag = dwarf_tag (typedie);
+
+  /* Follow typedefs and qualifiers to get to the actual type.  */
+  while (tag == DW_TAG_typedef
+	 || tag == DW_TAG_const_type || tag == DW_TAG_volatile_type
+	 || tag == DW_TAG_restrict_type || tag == DW_TAG_mutable_type)
+    {
+      attr = dwarf_attr_integrate (typedie, DW_AT_type, &attr_mem);
+      typedie = dwarf_formref_die (attr, &die_mem);
+      tag = dwarf_tag (typedie);
+    }
+
+  Dwarf_Word size;
+  switch (tag)
+    {
+    case -1:
+      return -1;
+
+    case DW_TAG_subrange_type:
+      if (! dwarf_hasattr_integrate (typedie, DW_AT_byte_size))
+	{
+	  attr = dwarf_attr_integrate (typedie, DW_AT_type, &attr_mem);
+	  typedie = dwarf_formref_die (attr, &die_mem);
+	  tag = dwarf_tag (typedie);
+	}
+      /* Fall through.  */
+
+    case DW_TAG_base_type:
+    case DW_TAG_enumeration_type:
+    case DW_TAG_pointer_type:
+    case DW_TAG_ptr_to_member_type:
+      if (dwarf_formudata (dwarf_attr_integrate (typedie, DW_AT_byte_size,
+						 &attr_mem), &size) != 0)
+	{
+	  if (tag == DW_TAG_pointer_type || tag == DW_TAG_ptr_to_member_type)
+	    size = 8;
+	  else
+	    return -1;
+	}
+      if (tag == DW_TAG_base_type)
+	{
+	  Dwarf_Word encoding;
+	  if (dwarf_formudata (dwarf_attr_integrate (typedie, DW_AT_encoding,
+						     &attr_mem),
+			       &encoding) != 0)
+	    return -1;
+        }
+
+      /* Small enough structs are passed directly in registers R0 ... R7.  */
+      if (size <= 8)
+	{
+	intreg:
+	  *locp = loc_intreg;
+	  return nloc_intreg;
+	}
+
+      /* Else fall through.  */
+    case DW_TAG_structure_type:
+    case DW_TAG_class_type:
+    case DW_TAG_union_type:
+    aggregate:
+      *locp = loc_aggregate;
+      return nloc_aggregate;
+
+    case DW_TAG_array_type:
+    case DW_TAG_string_type:
+      if (dwarf_aggregate_size (typedie, &size) == 0 && size <= 8)
+	{
+	  if (tag == DW_TAG_array_type)
+	    {
+	      /* Check if it's a character array.  */
+	      attr = dwarf_attr_integrate (typedie, DW_AT_type, &attr_mem);
+	      typedie = dwarf_formref_die (attr, &die_mem);
+	      tag = dwarf_tag (typedie);
+	      if (tag != DW_TAG_base_type)
+		goto aggregate;
+	      if (dwarf_formudata (dwarf_attr_integrate (typedie,
+							 DW_AT_byte_size,
+							 &attr_mem),
+				   &size) != 0)
+		return -1;
+	      if (size != 1)
+		goto aggregate;
+	    }
+	  goto intreg;
+	}
+      goto aggregate;
+    }
+
+  /* XXX We don't have a good way to return specific errors from ebl calls.
+     This value means we do not understand the type, but it is well-formed
+     DWARF and might be valid.  */
+  return -2;
+}
diff --git a/backends/tilegx_symbol.c b/backends/tilegx_symbol.c
new file mode 100644
index 00000000..b6533266
--- /dev/null
+++ b/backends/tilegx_symbol.c
@@ -0,0 +1,57 @@
+/* TILEGX-specific symbolic name handling.
+   Copyright (C) 2012 Tilera Corporation
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * 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
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <elf.h>
+#include <stddef.h>
+
+#define BACKEND		tilegx_
+#include "libebl_CPU.h"
+
+/* Check for the simple reloc types.  */
+Elf_Type
+tilegx_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type)
+{
+  switch (type)
+    {
+    case R_TILEGX_64:
+      return ELF_T_SXWORD;
+    case R_TILEGX_32:
+      return ELF_T_SWORD;
+    case R_TILEGX_16:
+      return ELF_T_HALF;
+    case R_TILEGX_8:
+      return ELF_T_BYTE;
+    default:
+      return ELF_T_NUM;
+    }
+}