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fix extract-vmlinux for non-gzip

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This commit is contained in:
Stéphane Lesimple 2018-01-08 09:56:29 +01:00
parent fa0850466e
commit c1004d5171
1 changed files with 16 additions and 15 deletions
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31
spectre-meltdown-checker.sh
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@ -1,7 +1,7 @@
#! /bin/sh
# Spectre & Meltdown checker
# Stephane Lesimple
VERSION=0.09
VERSION=0.10
# print status function
pstatus()
@ -45,34 +45,35 @@ try_decompress()
# "grep" that report the byte offset of the line instead of the pattern.
# Try to find the header ($1) and decompress from here
for pos in `tr "$1\n$2" "\n$2=" < "$img" | grep -abo "^$2"`
for pos in `tr "$1\n$2" "\n$2=" < "$4" | grep -abo "^$2"`
do
pos=${pos%%:*}
tail -c+$pos "$img" | $3 > $vmlinuxtmp 2> /dev/null
check_vmlinux $vmlinuxtmp && echo $vmlinuxtmp && return 0
tail -c+$pos "$4" | $3 > $vmlinuxtmp 2> /dev/null
check_vmlinux "$vmlinuxtmp" && echo "$vmlinuxtmp" && return 0
done
return 1
}
extract_vmlinux()
{
img="$1"
[ -n "$1" ] || return 1
# Prepare temp files:
vmlinuxtmp=$(mktemp /tmp/vmlinux-XXX)
vmlinuxtmp="$(mktemp /tmp/vmlinux-XXX)"
# Initial attempt for uncompressed images or objects:
if check_vmlinux $img; then
cat $img > $vmlinuxtmp
echo $vmlinuxtmp
if check_vmlinux "$1"; then
cat "$1" > "$vmlinuxtmp"
echo "$vmlinuxtmp"
return 0
fi
# That didn't work, so retry after decompression.
try_decompress '\037\213\010' xy gunzip || \
try_decompress '\3757zXZ\000' abcde unxz || \
try_decompress 'BZh' xy bunzip2 || \
try_decompress '\135\0\0\0' xxx unlzma || \
try_decompress '\211\114\132' xy 'lzop -d'
try_decompress '\037\213\010' xy gunzip "$1" && return 0
try_decompress '\3757zXZ\000' abcde unxz "$1" && return 0
try_decompress 'BZh' xy bunzip2 "$1" && return 0
try_decompress '\135\0\0\0' xxx unlzma "$1" && return 0
try_decompress '\211\114\132' xy 'lzop -d' "$1" && return 0
return 1
}
# end of extract-vmlinux functions