Dmitry V. Levin
30d9979184
When the given ELF file doesn't specify PT_INTERP, e.g. if it's a shared library, we have to guess it. We used to try the program interpreter of dump_ld_config, but it doesn't work well enough in multilib environments, so extend the guess by trying interpreters listed in RTLDLIST from /usr/bin/ldd script.
141 lines
2.9 KiB
Bash
Executable File
141 lines
2.9 KiB
Bash
Executable File
#! /bin/sh
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# Copyright (C) 1996-2004, 2005 Free Software Foundation, Inc.
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# Copyright (C) 2006-2018 Dmitry V. Levin <ldv@altlinux.org>
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#
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# This file is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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. @RPMCONFIGDIR@/functions
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warn=
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bind_now=
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debug=
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while test $# -gt 0; do
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case "$1" in
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--undefined)
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warn=1
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bind_now=1
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shift
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;;
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--bindings)
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warn=1
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bind_now=1
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debug=bindings
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shift
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;;
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--) # Stop option processing.
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shift; break
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;;
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-*)
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Fatal "unrecognized option: $1"
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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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case $# in
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[01]) Fatal 'insufficient arguments' ;;
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2) ;;
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*) Fatal 'too many arguments' ;;
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esac
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file="$1" && shift
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rpath="$1" && shift
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interp=
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get_interp_from_elf()
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{
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local f info
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f="$1"; shift
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info="$(readelf --wide --segments "$f")" ||
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Fatal "$f: unable to fetch ELF segment headers"
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interp="$(printf '%s\n' "$info" |
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sed -ne 's,^[[:space:]]*\[Requesting program interpreter: \(/[^]]\+\)\]$,\1,p')"
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[ -n "$interp" ]
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}
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rtld=
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get_rtld_from_interp()
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{
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if [ -n "${RPM_BUILD_ROOT-}" ] &&
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[ -f "$RPM_BUILD_ROOT$interp" -a -x "$RPM_BUILD_ROOT$interp" ]; then
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rtld="$RPM_BUILD_ROOT$interp"
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elif [ -f "$interp" -a -x "$interp" ]; then
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rtld="$interp"
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else
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rtld=
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fi
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[ -n "$rtld" ]
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}
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verify_out=
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rtld_verify_elf()
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{
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local f
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f="$1"; shift
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verify_out="$("$rtld" --verify "$f")"
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[ "$?" = 0 -o "$?" = 2 ]
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}
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trace_elf()
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{
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local f
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f="$1"; shift
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LD_TRACE_LOADED_OBJECTS=1 \
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LD_WARN=$warn \
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LD_BIND_NOW=$bind_now \
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LD_DEBUG=$debug \
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LD_LIBRARY_VERSION=$verify_out \
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LD_PRELOAD="$RPM_LD_PRELOAD" \
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"$rtld" --library-path "$rpath" "$f" ||
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Fatal "$f: trace failed"
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exit 0
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}
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if get_interp_from_elf "$file"; then
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get_rtld_from_interp ||
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Fatal "$file: program interpreter $interp not found"
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rtld_verify_elf "$file" &&
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trace_elf "$file"
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fi
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for interp in $(cat /usr/bin/ldd 2>/dev/null |
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sed -n 's/^RTLDLIST="\([^"]\+\)"/\1/p'); do
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get_rtld_from_interp &&
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rtld_verify_elf "$file" &&
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trace_elf "$file"
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done
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dump_ld_config='@RPMCONFIGDIR@/dump_ld_config'
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get_interp_from_elf "$dump_ld_config" ||
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Fatal "$dump_ld_config: program interpreter not specified"
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get_rtld_from_interp ||
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Fatal "$dump_ld_config: program interpreter $interp not found"
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rtld_verify_elf "$file" &&
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trace_elf "$file"
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Fatal "$file: failed to find the program interpreter"
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