diff options
Diffstat (limited to 'scripts/xldd.in')
| -rwxr-xr-x | scripts/xldd.in | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/scripts/xldd.in b/scripts/xldd.in index 3398fdc..708f6d7 100755 --- a/scripts/xldd.in +++ b/scripts/xldd.in @@ -12,6 +12,7 @@ prefix="${0%-ldd}" gcc="${prefix}-gcc" readelf="${prefix}-readelf" fake_load_addr_root="$((0xdeadbeef))" +fake_load_addr_rpath="$((0xdeadc0de))" fake_load_addr_sysroot="$((0x8badf00d))" ld_library_path="/lib:/usr/lib" @@ -53,6 +54,7 @@ Usage: ${my_name} [OPTION]... --root DIR FILE... --version print version information and exit --root dir treat dir as being the root of the target -s, --show-system mark libs from the sysroot with a trailing '[*]' + and libs found via RPATH with a trailing '[+]' _EOF_ cat <<_EOF_ |fmt @@ -70,6 +72,12 @@ guessed except at runtime, and we can't run. ${my_name} does not scan /etc/ld.so.cache, but instead uses /etc/ld.so.conf (it understands the include directives therein for libces that have that). +${my_name} also interprets (tries to!) the RPATH/RUNPATH records found in +the dynamic ELF section. Such paths are searched for only relative to +the specified root, not from the sysroot (see below). Also, those paths +are searched for not only for the file they appear in, but also for its +dependencies. + ${my_name} will search the directory specified with --root for libraries to resolve the NEEDED tags. If --root is not set, then ${my_name} will use the value in the environment variable \${CT_XLDD_ROOT}. If neither @@ -90,7 +98,8 @@ The paths are relative to the specified root directory, or to the sysroot The expected load address 'loadaddr' is a faked address to match the output of the real ldd, but has no actual meaning (set to some constants for now, -0x8badf00d for libraries from the sysroot, 0xdeadbeef for others). +0x8badf00d for libraries from the sysroot, 0xdeadc0de for those found via +the RPATH/RUNPATH records, and 0xdeadbeef for others). _EOF_ # Unimplemeted yet: @@ -168,6 +177,12 @@ do_report_needed_found() { root) loadaddr="${fake_load_addr_root}" ;; + rpath) + loadaddr="${fake_load_addr_rpath}" + if [ -n "${show_system}" ]; then + sys=" [+]" + fi + ;; sysroot) loadaddr="${fake_load_addr_sysroot}" if [ -n "${show_system}" ]; then @@ -189,6 +204,7 @@ do_report_needed_found() { do_find_needed() { local needed="${1}" local -a list + local -a dirs local found local where local base @@ -196,7 +212,9 @@ do_find_needed() { do_trace "Searching for '${needed}'\n" + # rpath shall come first! list=( \ + "rpath:${root}" \ "root:${root}" \ "sysroot:${sysroot}" \ ) @@ -204,7 +222,12 @@ do_find_needed() { for i in "${list[@]}"; do where="${i%%:*}" base="${i#*:}" - for d in "${needed_search_path[@]}"; do + if [ "${where}" = "rpath" ]; then + dirs=( "${search_rpath[@]}" ) + else + dirs=( "${needed_search_path[@]}" ) + fi + for d in "${dirs[@]}"; do do_trace "-> looking in '${d}' (${where})\n" if [ -f "${base}${d}/${needed}" ]; then found="${d}/${needed}" @@ -225,11 +248,25 @@ do_find_needed() { # Scan a file for all NEEDED tags do_process_file() { local file="${1}" + local -a save_search_rpath local n m local found do_trace "Parsing file '${file}'\n" + save_search_rpath=( "${search_rpath[@]}" ) + for n in $( "${readelf}" -d "${file}" \ + |"${grep}" -E '\((RPATH|RUNPATH)\)' \ + |"${sed}" -r -e 's/^.*Library r(|un)path:[[:space:]]+\[(.*)\]$/\2/;'\ + ); do + do_trace "-> adding rpath '${n}'\n" + search_rpath+=( "${n}" ) + done + do_trace ": search path:\n" + for n in "${search_rpath[@]}" "${needed_search_path[@]}"; do + do_trace ": - '${n}'\n" + done + for n in $( "${readelf}" -d "${file}" \ |"${grep}" -E '\(NEEDED\)' \ |"${sed}" -r -e 's/^.*Shared library:[[:space:]]+\[(.*)\]$/\1/;' \ @@ -245,7 +282,9 @@ do_process_file() { do_trace "-> handling new dependency '${n}'\n" needed_list+=( "${n}" ) do_find_needed "${n}" - done + done + + search_rpath=( "${save_search_rpath[@]}" ) } # Recursively scan a /etc/ld.so.conf file @@ -297,4 +336,5 @@ done do_trace "Scanning file '${1}'\n" declare -a needed_list +declare -a search_rpath do_process_file "${1}" |