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81 lines
3.2 KiB
C
81 lines
3.2 KiB
C
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/* Accumulation of various pieces of knowledge about ELF.
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Copyright (C) 2000-2012, 2014, 2016 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 2000.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifndef _ELF_KNOWLEDGE_H
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#define _ELF_KNOWLEDGE_H 1
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#include <stdbool.h>
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/* Test whether a section can be stripped or not. */
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#define SECTION_STRIP_P(shdr, name, remove_comment) \
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/* Sections which are allocated are not removed. */ \
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(((shdr)->sh_flags & SHF_ALLOC) == 0 \
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/* We never remove .note sections. */ \
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&& (shdr)->sh_type != SHT_NOTE \
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&& (((shdr)->sh_type) != SHT_PROGBITS \
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/* Never remove .gnu.warning.* sections. */ \
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|| (name != NULL \
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&& strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) != 0\
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/* We remove .comment sections only if explicitly told to do so. */\
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&& (remove_comment \
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|| strcmp (name, ".comment") != 0))))
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/* Test whether `sh_info' field in section header contains a section
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index. There are two kinds of sections doing this:
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- the sections containing relocation information reference in this
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field the section to which the relocations apply;
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- section with the SHF_INFO_LINK flag set to signal that `sh_info'
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references a section. This allows correct handling of unknown
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sections. */
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#define SH_INFO_LINK_P(Shdr) \
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((Shdr)->sh_type == SHT_REL || (Shdr)->sh_type == SHT_RELA \
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|| ((Shdr)->sh_flags & SHF_INFO_LINK) != 0)
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/* Size of an entry in the hash table. The ELF specification says all
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entries are regardless of platform 32-bits in size. Early 64-bit
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ports (namely Alpha for Linux) got this wrong. The wording was not
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clear.
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Several years later the ABI for the 64-bit S390s was developed.
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Many things were copied from the IA-64 ABI (which uses the correct
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32-bit entry size) but what do these people do? They use 64-bit
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entries. It is really shocking to see what kind of morons are out
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there. And even worse: they are allowed to design ABIs. */
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#define SH_ENTSIZE_HASH(Ehdr) \
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((Ehdr)->e_machine == EM_ALPHA \
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|| ((Ehdr)->e_machine == EM_S390 \
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&& (Ehdr)->e_ident[EI_CLASS] == ELFCLASS64) ? 8 : 4)
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#endif /* elf-knowledge.h */
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