2014-09-12 22:14:23 +00:00
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#!/bin/sh
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# relro_test.sh -- test -z relro
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2021-03-21 00:09:18 +00:00
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# Copyright (C) 2010-2020 Free Software Foundation, Inc.
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2014-09-12 22:14:23 +00:00
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# Written by Cary Coutant <ccoutant@google.com>.
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# This file is part of gold.
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# This program 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 3 of the License, or
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# (at your option) any later version.
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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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# 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 Street - Fifth Floor, Boston,
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# MA 02110-1301, USA.
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# This test checks that the PT_GNU_RELRO segment is properly
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# aligned and is coincident with the beginning of the data segment.
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# Cleans a hexadecimal number for input to dc.
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clean_hex()
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{
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echo "$1" | sed -e 's/0x//' -e 'y/abcdef/ABCDEF/'
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}
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check()
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{
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# Get the address and length of the PT_GNU_RELRO segment.
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RELRO_START=`grep GNU_RELRO "$1" | awk '{ print $3; }'`
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RELRO_LEN=`grep GNU_RELRO "$1" | awk '{ print $6; }'`
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if test -z "$RELRO_START"
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then
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echo "Did not find a PT_GNU_RELRO segment."
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exit 1
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fi
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# Get the address and alignment of the PT_LOAD segment whose address
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# matches the PT_GNU_RELRO segment.
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LOAD_ALIGN=`grep LOAD "$1" | awk -v A=$RELRO_START '$3 == A { print $NF; }'`
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LOAD_LEN=`grep LOAD "$1" | awk -v A=$RELRO_START '$3 == A { print $6; }'`
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if test -z "$LOAD_LEN"
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then
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echo "Did not find a PT_LOAD segment matching the PT_GNU_RELRO segment."
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exit 1
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fi
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# Compute the address of the end of the PT_GNU_RELRO segment,
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# modulo the alignment of the PT_LOAD segment.
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RELRO_START=`clean_hex "$RELRO_START"`
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RELRO_LEN=`clean_hex "$RELRO_LEN"`
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LOAD_ALIGN=`clean_hex "$LOAD_ALIGN"`
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RELRO_END=`echo "16o 16i $RELRO_START $RELRO_LEN + p" | dc`
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REM=`echo "16i $RELRO_END $LOAD_ALIGN % p" | dc`
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if test "$REM" -eq 0; then
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:
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else
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echo "PT_GNU_RELRO segment does not end at page boundary."
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exit 1
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fi
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}
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check relro_test.stdout
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