2014-11-06 22:45:03 +00:00
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#!/bin/sh
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# $FreeBSD$
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2015-04-21 03:29:03 +00:00
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libkey() {
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libkey="lib_symbols_$1"
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2015-04-21 05:10:18 +00:00
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patterns=[.+,/-]
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2015-04-21 03:29:03 +00:00
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replacement=_
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while :; do
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case " ${libkey} " in
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*${patterns}*)
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libkey="${libkey%%${patterns}*}${replacement}${libkey#*${patterns}}"
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;;
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*)
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break
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;;
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esac
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done
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return 0
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}
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2015-04-20 20:51:19 +00:00
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ret=0
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CHECK_UNRESOLVED=1
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2015-05-01 05:01:56 +00:00
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VERBOSE_RESOLVED=0
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while getopts "Uv" flag; do
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2015-04-20 20:51:19 +00:00
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case "${flag}" in
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U) CHECK_UNRESOLVED=0 ;;
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2015-05-01 05:01:56 +00:00
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v) VERBOSE_RESOLVED=1 ;;
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2015-04-20 20:51:19 +00:00
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esac
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done
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shift $((OPTIND-1))
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2016-01-19 22:42:10 +00:00
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if ! [ -f "$1" ]; then
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echo "No such file or directory: $1" >&2
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exit 1
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fi
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2015-04-09 22:16:35 +00:00
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mime=$(file -L --mime-type $1)
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2015-04-21 03:29:03 +00:00
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isbin=0
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2014-11-06 22:45:03 +00:00
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case $mime in
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2015-04-21 03:29:03 +00:00
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*application/x-executable) isbin=1 ;;
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2014-11-06 22:45:03 +00:00
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*application/x-sharedlib);;
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*) echo "Not an elf file" >&2 ; exit 1;;
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esac
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2015-04-20 20:51:19 +00:00
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# Gather all symbols from the target
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2015-04-21 05:41:56 +00:00
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unresolved_symbols=$(nm -u -D --format=posix "$1" | awk '$2 == "U" {print $1}' | tr '\n' ' ')
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[ ${isbin} -eq 1 ] && bss_symbols=$(nm -D --format=posix "$1" | awk '$2 == "B" && $4 != "" {print $1}' | tr '\n' ' ')
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2015-04-21 02:02:25 +00:00
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ldd_libs=$(ldd $(realpath $1) | awk '{print $1 ":" $3}')
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2015-04-20 20:51:19 +00:00
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2014-11-06 22:45:03 +00:00
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# Check for useful libs
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2015-04-20 20:51:19 +00:00
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list_libs=
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resolved_symbols=
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2015-04-09 22:16:35 +00:00
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for lib in $(readelf -d $1 | awk '$2 ~ /\(?NEEDED\)?/ { sub(/\[/,"",$NF); sub(/\]/,"",$NF); print $NF }'); do
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2015-04-20 20:45:10 +00:00
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echo -n "checking if $lib is needed: "
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2015-04-21 05:10:18 +00:00
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if [ -n "${lib##/*}" ]; then
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for libpair in ${ldd_libs}; do
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case "${libpair}" in
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${lib}:*) libpath="${libpair#*:}" && break ;;
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esac
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done
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else
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libpath="${lib}"
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fi
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2015-04-20 20:51:19 +00:00
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list_libs="$list_libs $lib"
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foundone=
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2015-04-21 03:29:03 +00:00
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lib_symbols="$(nm -D --defined-only --format=posix "${libpath}" | awk '$2 ~ /C|R|D|T|W|B|V/ {print $1}' | tr '\n' ' ')"
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2015-04-20 20:51:19 +00:00
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if [ ${CHECK_UNRESOLVED} -eq 1 ]; then
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# Save the global symbols for this lib
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libkey "${lib}"
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2015-04-21 03:29:03 +00:00
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setvar "${libkey}" "${lib_symbols}"
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2015-04-20 20:51:19 +00:00
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fi
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for fct in ${lib_symbols}; do
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2015-04-21 05:41:56 +00:00
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case " ${unresolved_symbols} ${bss_symbols} " in
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2015-04-20 20:51:19 +00:00
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*\ ${fct}\ *) foundone="${fct}" && break ;;
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esac
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done
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if [ -n "${foundone}" ]; then
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echo "yes... ${foundone}"
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2015-04-20 20:45:10 +00:00
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else
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echo "no"
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2015-04-20 20:51:19 +00:00
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ret=1
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2015-04-20 20:45:10 +00:00
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fi
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2014-11-06 22:45:03 +00:00
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done
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2015-04-20 20:51:19 +00:00
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if [ ${CHECK_UNRESOLVED} -eq 1 ]; then
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2015-04-21 03:29:03 +00:00
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# Add in crt1 symbols
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list_libs="${list_libs} crt1.o"
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lib_symbols="$(nm --defined-only --format=posix "/usr/lib/crt1.o" | awk '$2 ~ /C|R|D|T|W|B|V/ {print $1}' | tr '\n' ' ')"
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# Save the global symbols for this lib
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libkey "crt1.o"
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setvar "${libkey}" "${lib_symbols}"
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2015-05-01 04:35:42 +00:00
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# Now search libs for all symbols and report missing ones.
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2015-04-20 20:51:19 +00:00
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for sym in ${unresolved_symbols}; do
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found=0
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for lib in ${list_libs}; do
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libkey "${lib}"
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eval "lib_symbols=\"\${${libkey}}\""
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# lib_symbols now contains symbols for the lib.
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case " ${lib_symbols} " in
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2015-05-01 05:01:56 +00:00
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*\ ${sym}\ *)
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[ ${VERBOSE_RESOLVED} -eq 1 ] &&
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echo "Resolved symbol ${sym} from ${lib}"
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found=1
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break
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;;
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2015-04-20 20:51:19 +00:00
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esac
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done
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if [ $found -eq 0 ]; then
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echo "Unresolved symbol $sym"
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ret=1
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fi
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2015-04-20 20:45:10 +00:00
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done
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2015-04-20 20:51:19 +00:00
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fi
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exit ${ret}
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