[Buildroot] [PATCH v4 03/11] support/scripts: add fix-rpath script to sanitize the rpath
Wolfgang Grandegger
wg at grandegger.com
Tue Jun 27 10:26:39 UTC 2017
From: Samuel Martin <s.martin49 at gmail.com>
This commit introduces the script "fix-rpath" able to scan a tree,
detect ELF files, check their RPATH and fix it in a proper way.
The RPATH fixup is done by the patchelf utility using the option
"--make-rpath-relative <root-directory>".
Signed-off-by: Samuel Martin <s.martin49 at gmail.com>
Signed-off-by: Wolfgang Grandegger <wg at grandegger.com>
---
support/scripts/fix-rpath | 112 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 112 insertions(+)
create mode 100755 support/scripts/fix-rpath
diff --git a/support/scripts/fix-rpath b/support/scripts/fix-rpath
new file mode 100755
index 0000000..5d40657
--- /dev/null
+++ b/support/scripts/fix-rpath
@@ -0,0 +1,112 @@
+#!/usr/bin/env bash
+
+# Copyright (C) 2016 Samuel Martin <s.martin49 at gmail.com>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of 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.
+#
+# This program 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 a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+usage() {
+ cat <<EOF >&2
+Usage: ${0} TREE_KIND
+
+Description:
+
+ This script scans a tree and sanitize ELF files' RPATH found in there.
+
+ Sanitization behaves the same whatever the kind of the processed tree,
+ but the resulting RPATH differs. The rpath sanitization is done using
+ "patchelf --make-rpath-relazive".
+
+Arguments:
+
+ TREE_KIND Kind of tree to be processed.
+ Allowed values: host, target, staging
+
+Environment:
+
+ PATCHELF patchelf program to use
+ (default: HOST_DIR/usr/bin/patchelf)
+EOF
+}
+
+: ${PATCHELF:=${HOST_DIR}/usr/bin/patchelf}
+
+main() {
+ local rootdir
+ local tree="${1}"
+ local find_args=( )
+ local sanitize_extra_args=( )
+
+ case "${tree}" in
+ host)
+ rootdir="${HOST_DIR}"
+
+ # do not process the sysroot (only contains target binaries)
+ find_args+=( "-path" "${STAGING_DIR}" "-prune" "-o" )
+
+ # do not process the external toolchain installation directory to
+ # avoid breaking it.
+ test "${TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR}" != "" && \
+ find_args+=( "-path" "${TOOLCHAIN_EXTERNAL_DOWNLOAD_INSTALL_DIR}" "-prune" "-o" )
+
+ # ELF files should not be in these sub-directories
+ find_args+=( "-path" "${STAGING_DIR}/usr/share/terminfo" "-prune" "-o" )
+
+ # do not process the patchelf binary but a copy to work-around "file in use"
+ find_args+=( "-path" "${PATCHELF}" "-prune" "-o" )
+ cp "${PATCHELF}" "${PATCHELF}.__to_be_patched"
+
+ sanitize_extra_args+=( "--relative-to-file" )
+ ;;
+
+ staging)
+ rootdir="${STAGING_DIR}"
+ # supress include files
+ find_args+=( "-path" "${STAGING_DIR}/usr/include" "-prune" "-o" )
+ sanitize_extra_args+=( "--no-standard-lib-dirs" "--relative-to-file" )
+ ;;
+
+ target)
+ rootdir="${TARGET_DIR}"
+ sanitize_extra_args+=( "--no-standard-lib-dirs" )
+ ;;
+
+ *)
+ usage
+ exit 1
+ ;;
+ esac
+
+ find_args+=( "-type" "f" "-print" )
+
+ while read file ; do
+ # check if it's an ELF file
+ if ${PATCHELF} --print-rpath "${file}" > /dev/null 2>&1; then
+ # make files writable if necessary
+ changed=$(chmod -c u+w "${file}")
+ # call patchelf to sanitize the rpath
+ ${PATCHELF} --make-rpath-relative "${rootdir}" ${sanitize_extra_args[@]} "${file}"
+ # restore the original permission
+ test "${changed}" != "" && chmod u-w "${file}"
+ fi
+ done < <(find "${rootdir}" ${find_args[@]})
+
+ # Restore patched patchelf utility
+ test "${tree}" = "host" && mv "${PATCHELF}.__to_be_patched" "${PATCHELF}"
+
+ # ignore errors
+ return 0
+}
+
+main ${@}
--
2.7.4
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