Step1: build with busybox.
Signed-off-by: Chen Wang <wangchen20@iscas.ac.cn>
This commit is contained in:
Chen Wang
193
support/scripts/fix-rpath
Executable file
193
support/scripts/fix-rpath
Executable file
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#!/usr/bin/env bash
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# Copyright (C) 2016 Samuel Martin <s.martin49@gmail.com>
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# Copyright (C) 2017 Wolfgang Grandegger <wg@grandegger.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but 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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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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usage() {
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cat <<EOF >&2
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Usage: ${0} TREE_KIND
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Description:
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This script scans a tree and sanitize ELF files' RPATH found in there.
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Sanitization behaves the same whatever the kind of the processed tree,
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but the resulting RPATH differs. The rpath sanitization is done using
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"patchelf --make-rpath-relative".
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Arguments:
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TREE_KIND Kind of tree to be processed.
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Allowed values: host, target, staging
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Environment:
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PATCHELF patchelf program to use
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(default: HOST_DIR/bin/patchelf)
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HOST_DIR host directory
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STAGING_DIR staging directory
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TARGET_DIR target directory
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TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR
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(default HOST_DIR/opt/ext-toolchain)
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PARALLEL_JOBS number of parallel jobs to run
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Returns: 0 if success or 1 in case of error
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EOF
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}
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: "${PATCHELF:=${HOST_DIR}/bin/patchelf}"
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# ELF files should not be in these sub-directories
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HOST_EXCLUDEPATHS="/share/terminfo"
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STAGING_EXCLUDEPATHS="/usr/include /usr/share/terminfo"
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TARGET_EXCLUDEPATHS="/lib/firmware"
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declare -a sanitize_extra_args
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rootdir=
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patch_file() {
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local file="${1}"
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# check if it's an ELF file
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rpath="$("${PATCHELF}" --print-rpath "${file}" 2>&1)"
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if test $? -ne 0 ; then
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return 0
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fi
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# make files writable if necessary
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changed="$(chmod -c u+w "${file}")"
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# With per-package directory support, most RPATH of host
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# binaries will point to per-package directories. This won't
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# work with the --make-rpath-relative ${rootdir} invocation as
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# the per-package host directory is not within ${rootdir}. So,
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# we rewrite all RPATHs pointing to per-package directories so
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# that they point to the global host directory.
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# shellcheck disable=SC2001 # ${var//search/replace} hard when search or replace have / in them
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changed_rpath="$(echo "${rpath}" | sed "s@${PER_PACKAGE_DIR}/[^/]\+/host@${HOST_DIR}@g")"
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if test "${rpath}" != "${changed_rpath}" ; then
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"${PATCHELF}" --set-rpath "${changed_rpath}" "${file}"
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fi
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# call patchelf to sanitize the rpath
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"${PATCHELF}" --make-rpath-relative "${rootdir}" "${sanitize_extra_args[@]}" "${file}"
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# restore the original permission
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test "${changed}" != "" && chmod u-w "${file}"
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}
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patch_files() {
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while read -r -d $'\0' file; do
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# for performance reasons, we want to do as little work as
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# possible on non-ELF files. therefore, make sure that the
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# file at least starts with the ELF magic before handing it of
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# to patchelf, which will then perform the proper validation.
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read -r -n4 magic <"${file}" && test "${magic}" != $'\x7fELF' && continue
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patch_file "${file}"
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done
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}
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main() {
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local tree
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local -a find_args
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tree="${1}"
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if ! "${PATCHELF}" --version > /dev/null 2>&1; then
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echo "Error: can't execute patchelf utility '${PATCHELF}'"
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exit 1
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fi
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case "${tree}" in
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host)
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rootdir="${HOST_DIR}"
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# do not process the sysroot (only contains target binaries)
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find_args+=( "-path" "${STAGING_DIR}" "-prune" "-o" )
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# do not process the external toolchain installation directory to
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# avoid breaking it.
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test "${TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR}" != "" && \
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find_args+=( "-path" "${TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR}" "-prune" "-o" )
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for excludepath in ${HOST_EXCLUDEPATHS}; do
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find_args+=( "-path" "${HOST_DIR}""${excludepath}" "-prune" "-o" )
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done
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# do not process the patchelf binary but a copy to work-around "file in use"
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find_args+=( "-path" "${PATCHELF}" "-prune" "-o" )
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cp "${PATCHELF}" "${PATCHELF}.__to_be_patched"
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# we always want $ORIGIN-based rpaths to make it relocatable.
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sanitize_extra_args+=( "--relative-to-file" )
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;;
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staging)
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rootdir="${STAGING_DIR}"
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# ELF files should not be in these sub-directories
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for excludepath in ${STAGING_EXCLUDEPATHS}; do
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find_args+=( "-path" "${STAGING_DIR}""${excludepath}" "-prune" "-o" )
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done
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# should be like for the target tree below
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sanitize_extra_args+=( "--no-standard-lib-dirs" )
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;;
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target)
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rootdir="${TARGET_DIR}"
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for excludepath in ${TARGET_EXCLUDEPATHS}; do
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find_args+=( "-path" "${TARGET_DIR}""${excludepath}" "-prune" "-o" )
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done
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# we don't want $ORIGIN-based rpaths but absolute paths without rootdir.
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# we also want to remove rpaths pointing to /lib or /usr/lib.
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sanitize_extra_args+=( "--no-standard-lib-dirs" )
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;;
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*)
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usage
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exit 1
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;;
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esac
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work=$(mktemp --tmpdir -d fix-rpath.XXXXXXXX)
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find_args+=( "-type" "f" "-print0" )
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find "${rootdir}" "${find_args[@]}" \
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| split -t '\0' -a4 -d -n "r/${PARALLEL_JOBS:-1}" "-" "${work}/part"
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for part in "${work}/part"*; do
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patch_files <"${part}" &
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done
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wait
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rm -rf "${work}"
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# Restore patched patchelf utility
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test "${tree}" = "host" && mv "${PATCHELF}.__to_be_patched" "${PATCHELF}"
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# ignore errors
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return 0
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}
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main "${@}"
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