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/elf_getident.c b/libelf/elf_getident.c
new file mode 100644
index 0000000..5abf8c9
--- /dev/null
+++ b/libelf/elf_getident.c
@@ -0,0 +1,61 @@
+/* Retrieve file identification data.
+ Copyright (C) 1998, 1999, 2000, 2002, 2004, 2015 Red Hat, Inc.
+ This file is part of elfutils.
+ Written by Ulrich Drepper <drepper@redhat.com>, 1998.
+
+ 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 <stddef.h>
+
+#include "libelfP.h"
+
+
+char *
+elf_getident (Elf *elf, size_t *ptr)
+{
+ /* In case this is no ELF file, the handle is invalid and we return
+ NULL. */
+ if (elf == NULL || elf->kind != ELF_K_ELF)
+ {
+ if (ptr != NULL)
+ *ptr = 0;
+ return NULL;
+ }
+
+ /* We already read the ELF header. Return a pointer to it and store
+ the length in *PTR. */
+ if (ptr != NULL)
+ *ptr = EI_NIDENT;
+
+ return (char *) (elf->class == ELFCLASS32
+ || (offsetof (struct Elf, state.elf32.ehdr)
+ == offsetof (struct Elf, state.elf64.ehdr))
+ ? elf->state.elf32.ehdr->e_ident
+ : elf->state.elf64.ehdr->e_ident);
+}