[Buildroot] [RFC PATCH 2/9] support/scripts: add fix-rpath script to sanitize the rpath
Wolfgang Grandegger
wg at grandegger.com
Fri Mar 3 14:18:46 UTC 2017
From: Samuel Martin <s.martin49 at gmail.com>
This commit introduces a fix-rpath script 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".
Signed-off-by: Samuel Martin <s.martin49 at gmail.com>
Signed-off-by: Wolfgang Grandegger <wg at grandegger.com>
---
support/scripts/fix-rpath | 106 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 106 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..bde2c17
--- /dev/null
+++ b/support/scripts/fix-rpath
@@ -0,0 +1,106 @@
+#!/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
+
+#set -e
+#set -v
+
+usage() {
+ cat <<EOF >&2
+Usage: ${0} TREE_KIND TREE_ROOT
+
+Description:
+
+ This script scans a tree and sanitize ELF files' RPATH found in there.
+
+ Sanitization behaves the same whatever the kindd of the processed tree, but
+ the resulting RPATH differs.
+
+ Sanitization action:
+ - remove RPATH pointing outside of the tree
+ - for RPATH pointing in the tree:
+ - if they point to standard location (/lib, /usr/lib): remove them
+ - otherwise: make them relative using \$ORIGIN
+
+ For the target tree:
+ - scan the whole tree for sanitization
+
+ For the staging tree :
+ - scan the whole tree for sanitization
+
+ For the host tree:
+ - skip the staging tree for sanitization
+ - add \$HOST_DIR/{lib,usr/lib} to RPATH (as relative pathes)
+
+Arguments:
+
+ TREE_KIND Kind of tree to be processed.
+ Allowed values: host, target, staging
+
+ TREE_ROOT Path to the root of the tree to be scaned
+
+Environment:
+
+ PATCHELF patchelf program to use
+ (default: patchelf)
+EOF
+}
+
+: ${PATCHELF:=patchelf}
+
+main() {
+ local tree="${1}"
+ local basedir="$(readlink -f "${2}")"
+
+ local find_args=( "${basedir}" )
+ local sanitize_extra_args=( )
+
+ case "${tree}" in
+ host)
+ # do not process the sysroot (only contains target binaries)
+ find_args+=( "-name" "sysroot" "-prune" "-o" )
+
+ # do not process the external toolchain installation directory to
+ # to avoid breaking it.
+ find_args+=( "-path" "*/opt/ext-toolchain" "-prune" "-o" )
+
+ ;;
+ staging|target)
+ # discard ${hostdir}/lib and ${hostdir}/usr/lib
+ sanitize_extra_args+=( "--no-standard-lib-dirs" )
+
+ ;;
+ *)
+ usage
+ exit 1
+ ;;
+ esac
+
+ find_args+=( "-type" "f" "-print" )
+
+ while read file ; do
+ # some files are not writable
+ chmod u+w $file
+ # call patchelf for each regular file; error will silently be ignored.
+ ${PATCHELF} --debug --make-rpath-relative "${basedir}" ${sanitize_extra_args[@]} "${file}" >> /dev/null 2>&1
+ done < <(find ${find_args[@]})
+
+ # ignore errors
+ return 0
+}
+
+main ${@}
--
1.9.1
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