diff --git a/libelf/elf-knowledge.h b/libelf/elf-knowledge.h
new file mode 100644
index 0000000..64f5887
--- /dev/null
+++ b/libelf/elf-knowledge.h
@@ -0,0 +1,80 @@
+/* Accumulation of various pieces of knowledge about ELF.
+   Copyright (C) 2000-2012, 2014, 2016 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/>.  */
+
+#ifndef _ELF_KNOWLEDGE_H
+#define _ELF_KNOWLEDGE_H	1
+
+#include <stdbool.h>
+
+
+/* Test whether a section can be stripped or not.  */
+#define SECTION_STRIP_P(shdr, name, remove_comment) \
+  /* Sections which are allocated are not removed.  */			      \
+  (((shdr)->sh_flags & SHF_ALLOC) == 0					      \
+   /* We never remove .note sections.  */				      \
+   && (shdr)->sh_type != SHT_NOTE					      \
+   && (((shdr)->sh_type) != SHT_PROGBITS				      \
+       /* Never remove .gnu.warning.* sections.  */			      \
+       || (name != NULL							      \
+	   && strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) != 0\
+	   /* We remove .comment sections only if explicitly told to do so. */\
+	   && (remove_comment						      \
+	       || strcmp (name, ".comment") != 0))))
+
+
+/* Test whether `sh_info' field in section header contains a section
+   index.  There are two kinds of sections doing this:
+
+   - the sections containing relocation information reference in this
+     field the section to which the relocations apply;
+
+   - section with the SHF_INFO_LINK flag set to signal that `sh_info'
+     references a section.  This allows correct handling of unknown
+     sections.  */
+#define SH_INFO_LINK_P(Shdr) \
+  ((Shdr)->sh_type == SHT_REL || (Shdr)->sh_type == SHT_RELA		      \
+   || ((Shdr)->sh_flags & SHF_INFO_LINK) != 0)
+
+
+/* Size of an entry in the hash table.  The ELF specification says all
+   entries are regardless of platform 32-bits in size.  Early 64-bit
+   ports (namely Alpha for Linux) got this wrong.  The wording was not
+   clear.
+
+   Several years later the ABI for the 64-bit S390s was developed.
+   Many things were copied from the IA-64 ABI (which uses the correct
+   32-bit entry size) but what do these people do?  They use 64-bit
+   entries.  It is really shocking to see what kind of morons are out
+   there.  And even worse: they are allowed to design ABIs.  */
+#define SH_ENTSIZE_HASH(Ehdr) \
+  ((Ehdr)->e_machine == EM_ALPHA					      \
+   || ((Ehdr)->e_machine == EM_S390					      \
+       && (Ehdr)->e_ident[EI_CLASS] == ELFCLASS64) ? 8 : 4)
+
+#endif	/* elf-knowledge.h */