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fix extract-vmlinux for non-gzip

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