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authorAlexey Neyman <stilor@att.net>2017-03-13 08:23:13 (GMT)
committerAlexey Neyman <stilor@att.net>2017-03-15 02:28:26 (GMT)
commitb00dea99511068b412f64a641deb7925b3e71d7f (patch)
treefe8338c13bf95d69571179fbd9b63103a5d3d6b6
parent11b52ab6d7aef83f624dccc81e0b479c5155fe31 (diff)
Check libraries for compatibility
... as we are going through various multilibs in ld.so.conf Signed-off-by: Alexey Neyman <stilor@att.net>
-rw-r--r--scripts/xldd.in56
1 files changed, 54 insertions, 2 deletions
diff --git a/scripts/xldd.in b/scripts/xldd.in
index 0e8c0d0..d575e3c 100644
--- a/scripts/xldd.in
+++ b/scripts/xldd.in
@@ -16,6 +16,10 @@ fake_load_addr_rpath="$((0xdeadc0de))"
fake_load_addr_sysroot="$((0x8badf00d))"
ld_library_path="/lib:/usr/lib"
+need_e_class=
+need_e_flags=
+need_e_mach=
+
do_error() {
printf "%s: %s\n" "${my_name}" "$*" >&2
}
@@ -200,6 +204,35 @@ do_report_needed_found() {
"${sys}"
}
+do_check_compat() {
+ local file="${1}"
+ local info e_mach e_class e_flags
+
+ if [ ! -r "${file}" ]; then
+ return 1
+ fi
+ info=`${readelf} -Wh "${file}"`
+ e_class=`echo "${info}" | "${sed}" -nr 's/.*Class:[[:space:]]*//p'`
+ e_mach=`echo "${info}" | "${sed}" -nr 's/.*Machine:[[:space:]]*//p'`
+ e_flags=`echo "${info}" | "${sed}" -nr 's/.*Flags:[[:space:]]*//p'`
+ if [ "${e_class}" != "${need_e_class}" ]; then
+ do_trace "-> skip incompatible '%s' (class '%s', need '%s')\n" \
+ "${base}${d}/${needed}" "${e_class}" "${need_e_class}"
+ return 1
+ fi
+ if [ "${e_mach}" != "${need_e_mach}" ]; then
+ do_trace "-> skip incompatible '%s' (machine '%s', need '%s')\n" \
+ "${base}${d}/${needed}" "${e_mach}" "${need_e_mach}"
+ return 1
+ fi
+ if [ "${e_flags}" != "${need_e_flags}" ]; then
+ do_trace "-> skip incompatible '%s' (flags '%s', need '%s')\n" \
+ "${base}${d}/${needed}" "${e_flags}" "${need_e_flags}"
+ return 1
+ fi
+ return 0
+}
+
# Search a needed file, scanning ${lib_dir} in the root directory
do_find_needed() {
local needed="${1}"
@@ -229,7 +262,7 @@ do_find_needed() {
fi
for d in "${dirs[@]}"; do
do_trace "-> looking in '%s' (%s)\n" "${d}" "${where}"
- if [ -f "${base}${d}/${needed}" ]; then
+ if do_check_compat "${base}${d}/${needed}"; then
found="${d}/${needed}"
do_trace "---> found\n"
break 2
@@ -250,9 +283,11 @@ do_find_needed() {
# Scan a file for all NEEDED tags
do_process_file() {
local file="${1}"
+ local initial="${2}"
local -a save_search_rpath
local n m
local found
+ local info
do_trace "Parsing file '%s'\n" "${file}"
@@ -270,6 +305,17 @@ do_process_file() {
done
do_trace ": end search path\n"
+ if [ -n "${initial}" ]; then
+ if ! "${readelf}" -Wl "${file}" |
+ "${grep}" 'Requesting program interpreter: ' >/dev/null; then
+ printf " not a dynamic executable\n"
+ exit 1
+ fi
+ info=`${readelf} -Wh "${file}"`
+ need_e_class=`echo "${info}" | "${sed}" -nr 's/.*Class:[[:space:]]*//p'`
+ need_e_mach=`echo "${info}" | "${sed}" -nr 's/.*Machine:[[:space:]]*//p'`
+ need_e_flags=`echo "${info}" | "${sed}" -nr 's/.*Flags:[[:space:]]*//p'`
+ fi
for n in $( "${readelf}" -d "${file}" \
|"${grep}" -E '\(NEEDED\)' \
|"${sed}" -r -e 's/^.*Shared library:[[:space:]]+\[([^]]+)\].*/\1/;' \
@@ -324,6 +370,12 @@ do_scan_etc_ldsoconf() {
do_trace "Finished parsing ld.so.conf: '%s'\n" "${ldsoconf}"
}
+if [ -z "${1}" ]; then
+ show_help
+elif [ ! -r "${1}" ]; then
+ do_error "${1}: No such file or directory"
+fi
+
# Build up the full list of search directories
declare -a needed_search_path
do_trace "Adding basic lib dirs\n"
@@ -348,5 +400,5 @@ done
declare -a needed_list
declare -a search_rpath
do_trace "Scanning file '%s'\n" "${1}"
-do_process_file "${1}"
+do_process_file "${1}" initial
do_trace "Done scanning file '%s'\n" "${1}"