Squashed 'third_party/elfutils/' content from commit 555e15e

Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/backends/i386_init.c b/backends/i386_init.c
new file mode 100644
index 0000000..fc1587a
--- /dev/null
+++ b/backends/i386_init.c
@@ -0,0 +1,71 @@
+/* Initialization of i386 specific backend library.
+   Copyright (C) 2000-2009, 2013, 2017 Red Hat, Inc.
+   This file is part of elfutils.
+   Written by Ulrich Drepper <drepper@redhat.com>, 2000.
+
+   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		i386_
+#define RELOC_PREFIX	R_386_
+#include "libebl_CPU.h"
+
+/* This defines the common reloc hooks based on i386_reloc.def.  */
+#include "common-reloc.c"
+
+const char *
+i386_init (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 = "Intel 80386";
+  i386_init_reloc (eh);
+  HOOK (eh, reloc_simple_type);
+  HOOK (eh, gotpc_reloc_check);
+  HOOK (eh, core_note);
+  generic_debugscn_p = eh->debugscn_p;
+  HOOK (eh, debugscn_p);
+  HOOK (eh, return_value_location);
+  HOOK (eh, register_info);
+  HOOK (eh, syscall_abi);
+  HOOK (eh, auxv_info);
+  HOOK (eh, disasm);
+  HOOK (eh, abi_cfi);
+  /* gcc/config/ #define DWARF_FRAME_REGISTERS.  For i386 it is 17, why?  */
+  eh->frame_nregs = 9;
+  HOOK (eh, set_initial_registers_tid);
+  HOOK (eh, unwind);
+
+  return MODVERSION;
+}