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44 lines
909 B
44 lines
909 B
7 months ago
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#!/bin/bash -eux
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# Copyright 2014 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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me=${0##*/}
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TMP="$me.tmp"
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# Work in scratch directory
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cd "$OUTDIR"
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IN=${SCRIPTDIR}/data/bios_link_mp.bin
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BIOS=${TMP}.bios.bin
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cp ${IN} ${BIOS}
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AREAS="RW_SECTION_A VBLOCK_B BOOT_STUB"
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# Extract good blobs first
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${FUTILITY} dump_fmap -x ${BIOS} ${AREAS}
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# Save the good blobs, make same-size random blobs, create command
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CMDS=""
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for a in ${AREAS}; do
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size=$(stat -c '%s' $a)
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mv $a $a.good
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dd if=/dev/urandom of=$a.rand bs=$size count=1
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CMDS="$CMDS $a:$a.rand"
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done
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# Poke the new blobs in
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${FUTILITY} load_fmap ${BIOS} ${CMDS}
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# Pull them back out and see if they match
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${FUTILITY} dump_fmap -x ${BIOS} ${AREAS}
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for a in ${AREAS}; do
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cmp $a $a.rand
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done
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# cleanup
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rm -f ${TMP}* ${AREAS} *.rand *.good
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exit 0
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