am 7401a30e: am 36e62782: Merge "Upgrade to elfutils 0.161."

* commit '7401a30e8b3a0de25d7e8a6b635fc33f45894118':
  Upgrade to elfutils 0.161.

1 files changed, 63 insertions, 0 deletions

diff --git a/src/backends/ppc64_resolve_sym.c b/src/backends/ppc64_resolve_sym.c
new file mode 100644
index 00000000..03f65584
--- /dev/null
+++ b/src/backends/ppc64_resolve_sym.c
@@ -0,0 +1,63 @@
+/* Resolve symbol values through .opd function descriptors.
+   Copyright (C) 2013 Red Hat, Inc.
+   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 ppc64_
+#include "libebl_CPU.h"
+
+/* Resolve a function descriptor if addr points into the .opd section.
+   The .opd section contains function descriptors consisting of 3 addresses.
+   function, toc and chain. We are just interested in the first.
+   http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html#FUNC-DES
+
+   Returns true if the given address could be resolved, false otherwise.
+*/
+bool
+ppc64_resolve_sym_value (Ebl *ebl, GElf_Addr *addr)
+{
+  if (ebl->fd_data != NULL && *addr >= ebl->fd_addr
+      && *addr + sizeof (Elf64_Addr) <= ebl->fd_addr + ebl->fd_data->d_size)
+    {
+      GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (ebl->elf, &ehdr_mem);
+      if (ehdr != NULL)
+	{
+	  Elf_Data opd_in, opd_out;
+	  opd_in.d_buf = ebl->fd_data->d_buf + (*addr - ebl->fd_addr);
+	  opd_out.d_buf = addr;
+	  opd_out.d_size = opd_in.d_size = sizeof (Elf64_Addr);
+	  opd_out.d_type = opd_in.d_type = ELF_T_ADDR;
+	  if (elf64_xlatetom (&opd_out, &opd_in,
+			      ehdr->e_ident[EI_DATA]) != NULL)
+	    return true;
+	}
+    }
+  return false;
+}