diff options
| -rwxr-xr-x | spectre-meltdown-checker.sh | 40 |
1 files changed, 24 insertions, 16 deletions
diff --git a/spectre-meltdown-checker.sh b/spectre-meltdown-checker.sh index c05671a..0662754 100755 --- a/spectre-meltdown-checker.sh +++ b/spectre-meltdown-checker.sh @@ -33,6 +33,8 @@ pstatus() # Licensed under the GNU General Public License, version 2 (GPLv2). # ---------------------------------------------------------------------- +vmlinux='' +vmlinux_err='' check_vmlinux() { readelf -h $1 > /dev/null 2>&1 || return 1 @@ -41,16 +43,20 @@ check_vmlinux() try_decompress() { - # The obscure use of the "tr" filter is to work around older versions of - # "grep" that report the byte offset of the line instead of the pattern. + # The obscure use of the "tr" filter is to work around older versions of + # "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=" < "$4" | grep -abo "^$2"` - do - pos=${pos%%:*} - tail -c+$pos "$4" | $3 > $vmlinuxtmp 2> /dev/null - check_vmlinux "$vmlinuxtmp" && echo "$vmlinuxtmp" && return 0 - done + # Try to find the header ($1) and decompress from here + for pos in `tr "$1\n$2" "\n$2=" < "$5" | grep -abo "^$2"` + do + if ! which $3 >/dev/null 2>&1; then + vmlinux_err="missing '$3' tool, please install it, usually it's in the '$4' package" + return 0 + fi + pos=${pos%%:*} + tail -c+$pos "$5" | $3 > $vmlinuxtmp 2> /dev/null + check_vmlinux "$vmlinuxtmp" && vmlinux=$vmlinuxtmp && return 0 + done return 1 } @@ -68,11 +74,11 @@ extract_vmlinux() fi # That didn't work, so retry after decompression. - 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 + try_decompress '\037\213\010' xy gunzip gunzip "$1" && return 0 + try_decompress '\3757zXZ\000' abcde unxz xz-utils "$1" && return 0 + try_decompress 'BZh' xy bunzip2 bzip2 "$1" && return 0 + try_decompress '\135\0\0\0' xxx unlzma xz-utils "$1" && return 0 + try_decompress '\211\114\132' xy 'lzop -d' lzop "$1" && return 0 return 1 } @@ -109,8 +115,10 @@ img='' if [ -z "$img" ]; then pstatus yellow UNKNOWN "couldn't find your kernel image in /boot, if you used netboot, this is normal" else - vmlinux=$(extract_vmlinux $img) - if [ -z "$vmlinux" -o ! -r "$vmlinux" ]; then + extract_vmlinux $img + if [ "$vmlinux_err" != "" ]; then + pstatus yellow UNKNOWN "couldn't extract your kernel from $img: $vmlinux_err" + elif [ -z "$vmlinux" -o ! -r "$vmlinux" ]; then pstatus yellow UNKNOWN "couldn't extract your kernel from $img" elif ! which objdump >/dev/null 2>&1; then pstatus yellow UNKNOWN "missing 'objdump' tool, please install it, usually it's in the binutils package" |