Squashed 'third_party/elfutils/' content from commit 555e15e
Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/libelf/gelf_getversym.c b/libelf/gelf_getversym.c
new file mode 100644
index 0000000..68d23c7
--- /dev/null
+++ b/libelf/gelf_getversym.c
@@ -0,0 +1,86 @@
+/* Get symbol version information at the given index.
+ Copyright (C) 1999, 2000, 2001, 2002, 2005, 2009, 2014, 2015 Red Hat, Inc.
+ This file is part of elfutils.
+ Written by Ulrich Drepper <drepper@redhat.com>, 1999.
+
+ 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 <gelf.h>
+#include <string.h>
+
+#include "libelfP.h"
+
+
+GElf_Versym *
+gelf_getversym (Elf_Data *data, int ndx, GElf_Versym *dst)
+{
+ Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data;
+ Elf_Scn *scn;
+ GElf_Versym *result;
+
+ if (data == NULL)
+ return NULL;
+
+ if (unlikely (data->d_type != ELF_T_HALF))
+ {
+ __libelf_seterrno (ELF_E_INVALID_HANDLE);
+ return NULL;
+ }
+
+ /* This is the one place where we have to take advantage of the fact
+ that an `Elf_Data' pointer is also a pointer to `Elf_Data_Scn'.
+ The interface is broken so that it requires this hack. */
+ scn = data_scn->s;
+
+ /* It's easy to handle this type. It has the same size for 32 and
+ 64 bit objects. */
+ assert (sizeof (GElf_Versym) == sizeof (Elf32_Versym));
+ assert (sizeof (GElf_Versym) == sizeof (Elf64_Versym));
+
+ rwlock_rdlock (scn->elf->lock);
+
+ /* The data is already in the correct form. Just make sure the
+ index is OK. */
+ if (INVALID_NDX (ndx, GElf_Versym, data))
+ {
+ __libelf_seterrno (ELF_E_INVALID_INDEX);
+ result = NULL;
+ }
+ else
+ {
+ *dst = ((GElf_Versym *) data->d_buf)[ndx];
+
+ result = dst;
+ }
+
+ rwlock_unlock (scn->elf->lock);
+
+ return result;
+}