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-knowledge.h b/libelf/elf-knowledge.h
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+/* 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 */