1#!/bin/sh 2 3# bnd_plt_1.sh -- test -z bndplt for x86_64 4 5# Copyright (C) 2016-2020 Free Software Foundation, Inc. 6# Written by Cary Coutant <ccoutant@gmail.com>. 7 8# This file is part of gold. 9 10# This program is free software; you can redistribute it and/or modify 11# it under the terms of the GNU General Public License as published by 12# the Free Software Foundation; either version 3 of the License, or 13# (at your option) any later version. 14 15# This program is distributed in the hope that it will be useful, 16# but WITHOUT ANY WARRANTY; without even the implied warranty of 17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18# GNU General Public License for more details. 19 20# You should have received a copy of the GNU General Public License 21# along with this program; if not, write to the Free Software 22# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 23# MA 02110-1301, USA. 24 25match() 26{ 27 if ! egrep "$1" "$2" >/dev/null 2>&1; then 28 echo 1>&2 "could not find '$1' in $2" 29 exit 1 30 fi 31} 32 33# Extract just the PLT portion of the disassembly. 34get_plt() 35{ 36 sed -n -e '/^Disassembly of section .plt:/,/^Disassembly/p' 37} 38 39# Extract the addresses of the indirect jumps, omitting the PLT0 entry. 40get_aplt_jmp_addresses() 41{ 42 sed -n -e '/_GLOBAL_OFFSET_TABLE_+0x10/d' \ 43 -e '/bnd jmp \*0x[0-9a-f]*(%rip)/p' | 44 sed -e 's/ *\([0-9a-f]*\):.*/\1/' 45} 46 47match 'bnd jmp \*0x[0-9a-f]*\(%rip\) *# [0-9a-f]* <_GLOBAL_OFFSET_TABLE_\+0x10>' bnd_plt_1.stdout 48 49for APLT_ADDR in $(get_plt < bnd_ifunc_2.stdout | get_aplt_jmp_addresses) 50do 51 match "bnd (call|jmp) $APLT_ADDR" bnd_ifunc_2.stdout 52done 53