Blame view
scripts/decodecode
2.88 KB
dcecc6c70
|
1 |
#!/bin/sh |
b24413180
|
2 |
# SPDX-License-Identifier: GPL-2.0 |
dcecc6c70
|
3 4 5 6 7 8 |
# Disassemble the Code: line in Linux oopses # usage: decodecode < oops.file # # options: set env. variable AFLAGS=options to pass options to "as"; # e.g., to decode an i386 oops on an x86_64 system, use: # AFLAGS=--32 decodecode < 386.oops |
d72e720a1
|
9 |
# PC=hex - the PC (program counter) the oops points to |
dcecc6c70
|
10 |
|
fa220d89a
|
11 |
cleanup() { |
5358db0b0
|
12 |
rm -f $T $T.s $T.o $T.oo $T.aa $T.dis |
fa220d89a
|
13 14 15 16 17 18 19 20 21 22 23 |
exit 1 } die() { echo "$@" exit 1 } trap cleanup EXIT T=`mktemp` || die "cannot create temp file" |
dcecc6c70
|
24 |
code= |
7e68b3614
|
25 |
cont= |
dcecc6c70
|
26 27 28 29 30 31 |
while read i ; do case "$i" in *Code:*) code=$i |
7e68b3614
|
32 33 34 35 36 37 38 39 40 41 42 |
cont=yes ;; *) [ -n "$cont" ] && { xdump="$(echo $i | grep '^[[:xdigit:]<>[:space:]]\+$')" if [ -n "$xdump" ]; then code="$code $xdump" else cont= fi } |
dcecc6c70
|
43 44 45 46 47 48 |
;; esac done if [ -z "$code" ]; then |
fa220d89a
|
49 |
rm $T |
dcecc6c70
|
50 51 52 53 54 |
exit fi echo $code code=`echo $code | sed -e 's/.*Code: //'` |
5358db0b0
|
55 |
width=`expr index "$code" ' '` |
b396aa030
|
56 |
width=$((($width-1)/2)) |
5358db0b0
|
57 58 59 60 61 |
case $width in 1) type=byte ;; 2) type=2byte ;; 4) type=4byte ;; esac |
c5cfb62f2
|
62 63 64 65 66 67 |
if [ -z "$ARCH" ]; then case `uname -m` in aarch64*) ARCH=arm64 ;; arm*) ARCH=arm ;; esac fi |
d72e720a1
|
68 |
# Params: (tmp_file, pc_sub) |
5358db0b0
|
69 |
disas() { |
d72e720a1
|
70 71 72 73 |
t=$1 pc_sub=$2 ${CROSS_COMPILE}as $AFLAGS -o $t.o $t.s > /dev/null 2>&1 |
5358db0b0
|
74 |
|
b396aa030
|
75 76 |
if [ "$ARCH" = "arm" ]; then if [ $width -eq 2 ]; then |
5358db0b0
|
77 78 |
OBJDUMPFLAGS="-M force-thumb" fi |
d72e720a1
|
79 |
${CROSS_COMPILE}strip $t.o |
5358db0b0
|
80 |
fi |
be9fa663d
|
81 82 83 84 |
if [ "$ARCH" = "arm64" ]; then if [ $width -eq 4 ]; then type=inst fi |
d72e720a1
|
85 |
${CROSS_COMPILE}strip $t.o |
be9fa663d
|
86 |
fi |
d72e720a1
|
87 88 89 90 91 92 93 94 95 |
if [ $pc_sub -ne 0 ]; then if [ $PC ]; then adj_vma=$(( $PC - $pc_sub )) OBJDUMPFLAGS="$OBJDUMPFLAGS --adjust-vma=$adj_vma" fi fi ${CROSS_COMPILE}objdump $OBJDUMPFLAGS -S $t.o | \ grep -v "/tmp\|Disassembly\|\.text\|^$" > $t.dis 2>&1 |
5358db0b0
|
96 |
} |
dcecc6c70
|
97 98 99 100 |
marker=`expr index "$code" "\<"` if [ $marker -eq 0 ]; then marker=`expr index "$code" "\("` fi |
d72e720a1
|
101 |
|
846442c8d
|
102 |
touch $T.oo |
dcecc6c70
|
103 |
if [ $marker -ne 0 ]; then |
d72e720a1
|
104 105 |
# 2 opcode bytes and a single space pc_sub=$(( $marker / 3 )) |
846442c8d
|
106 107 108 |
echo All code >> $T.oo echo ======== >> $T.oo beforemark=`echo "$code"` |
5358db0b0
|
109 110 |
echo -n " .$type 0x" > $T.s echo $beforemark | sed -e 's/ /,0x/g; s/[<>()]//g' >> $T.s |
d72e720a1
|
111 |
disas $T $pc_sub |
5358db0b0
|
112 113 |
cat $T.dis >> $T.oo rm -f $T.o $T.s $T.dis |
dcecc6c70
|
114 115 116 117 |
# and fix code at-and-after marker code=`echo "$code" | cut -c$((${marker} + 1))-` fi |
846442c8d
|
118 119 |
echo Code starting with the faulting instruction > $T.aa echo =========================================== >> $T.aa |
5358db0b0
|
120 121 |
code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'` echo -n " .$type 0x" > $T.s |
dcecc6c70
|
122 |
echo $code >> $T.s |
d72e720a1
|
123 |
disas $T 0 |
5358db0b0
|
124 |
cat $T.dis >> $T.aa |
846442c8d
|
125 |
|
18ff44b18
|
126 127 128 129 130 |
# (lines of whole $T.oo) - (lines of $T.aa, i.e. "Code starting") + 3, # i.e. the title + the "===..=" line (sed is counting from 1, 0 address is # special) faultlinenum=$(( $(wc -l $T.oo | cut -d" " -f1) - \ $(wc -l $T.aa | cut -d" " -f1) + 3)) |
2a95e37c1
|
131 |
faultline=`cat $T.dis | head -1 | cut -d":" -f2-` |
5358db0b0
|
132 |
faultline=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'` |
846442c8d
|
133 |
|
e08df079b
|
134 |
cat $T.oo | sed -e "${faultlinenum}s/^\([^:]*:\)\(.*\)/\1\*\2\t\t<-- trapping instruction/" |
846442c8d
|
135 136 137 |
echo cat $T.aa cleanup |