Linux/scripts/decodecode

Version: ~ [ linux-6.12-rc7 ] ~ [ linux-6.11.7 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.60 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.116 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.171 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.229 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.285 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.323 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.12 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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1 #!/bin/bash !! 1 #!/bin/sh 2 # SPDX-License-Identifier: GPL-2.0 2 # SPDX-License-Identifier: GPL-2.0 3 # Disassemble the Code: line in Linux oopses 3 # Disassemble the Code: line in Linux oopses 4 # usage: decodecode < oops.file 4 # usage: decodecode < oops.file 5 # 5 # 6 # options: set env. variable AFLAGS=options to 6 # options: set env. variable AFLAGS=options to pass options to "as"; 7 # e.g., to decode an i386 oops on an x86_64 sy 7 # e.g., to decode an i386 oops on an x86_64 system, use: 8 # AFLAGS=--32 decodecode < 386.oops 8 # AFLAGS=--32 decodecode < 386.oops 9 # PC=hex - the PC (program counter) the oops p << 10 << 11 faultlinenum=1 << 12 9 13 cleanup() { 10 cleanup() { 14 rm -f $T $T.s $T.o $T.oo $T.aa $T.dis 11 rm -f $T $T.s $T.o $T.oo $T.aa $T.dis 15 exit 1 12 exit 1 16 } 13 } 17 14 18 die() { 15 die() { 19 echo "$@" 16 echo "$@" 20 exit 1 17 exit 1 21 } 18 } 22 19 23 trap cleanup EXIT 20 trap cleanup EXIT 24 21 25 T=`mktemp` || die "cannot create temp file" 22 T=`mktemp` || die "cannot create temp file" 26 code= 23 code= 27 cont= 24 cont= 28 25 29 while read i ; do 26 while read i ; do 30 27 31 case "$i" in 28 case "$i" in 32 *Code:*) 29 *Code:*) 33 code=$i 30 code=$i 34 cont=yes 31 cont=yes 35 ;; 32 ;; 36 *) 33 *) 37 [ -n "$cont" ] && { 34 [ -n "$cont" ] && { 38 xdump="$(echo $i | grep '^[[:x 35 xdump="$(echo $i | grep '^[[:xdigit:]<>[:space:]]\+$')" 39 if [ -n "$xdump" ]; then 36 if [ -n "$xdump" ]; then 40 code="$code $xdump" 37 code="$code $xdump" 41 else 38 else 42 cont= 39 cont= 43 fi 40 fi 44 } 41 } 45 ;; 42 ;; 46 esac 43 esac 47 44 48 done 45 done 49 46 50 if [ -z "$code" ]; then 47 if [ -z "$code" ]; then 51 rm $T 48 rm $T 52 exit 49 exit 53 fi 50 fi 54 51 55 echo $code 52 echo $code 56 code=`echo $code | sed -e 's/.*Code: //'` 53 code=`echo $code | sed -e 's/.*Code: //'` 57 54 58 width=`expr index "$code" ' '` 55 width=`expr index "$code" ' '` 59 width=$((($width-1)/2)) 56 width=$((($width-1)/2)) 60 case $width in 57 case $width in 61 1) type=byte ;; 58 1) type=byte ;; 62 2) type=2byte ;; 59 2) type=2byte ;; 63 4) type=4byte ;; 60 4) type=4byte ;; 64 esac 61 esac 65 62 66 if [ -z "$ARCH" ]; then 63 if [ -z "$ARCH" ]; then 67 case `uname -m` in 64 case `uname -m` in 68 aarch64*) ARCH=arm64 ;; 65 aarch64*) ARCH=arm64 ;; 69 arm*) ARCH=arm ;; 66 arm*) ARCH=arm ;; 70 loongarch*) ARCH=loongarch ;; << 71 esac 67 esac 72 fi 68 fi 73 69 74 # Params: (tmp_file, pc_sub) << 75 disas() { 70 disas() { 76 t=$1 !! 71 ${CROSS_COMPILE}as $AFLAGS -o $1.o $1.s > /dev/null 2>&1 77 pc_sub=$2 << 78 << 79 ${CROSS_COMPILE}as $AFLAGS -o $t.o $t. << 80 72 81 if [ "$ARCH" = "arm" ]; then 73 if [ "$ARCH" = "arm" ]; then 82 if [ $width -eq 2 ]; then 74 if [ $width -eq 2 ]; then 83 OBJDUMPFLAGS="-M force 75 OBJDUMPFLAGS="-M force-thumb" 84 fi 76 fi 85 77 86 ${CROSS_COMPILE}strip $t.o !! 78 ${CROSS_COMPILE}strip $1.o 87 fi 79 fi 88 80 89 if [ "$ARCH" = "arm64" ]; then 81 if [ "$ARCH" = "arm64" ]; then 90 if [ $width -eq 4 ]; then 82 if [ $width -eq 4 ]; then 91 type=inst 83 type=inst 92 fi 84 fi 93 85 94 ${CROSS_COMPILE}strip $t.o !! 86 ${CROSS_COMPILE}strip $1.o 95 fi << 96 << 97 if [ "$ARCH" = "riscv" ]; then << 98 OBJDUMPFLAGS="-M no-aliases -- << 99 ${CROSS_COMPILE}strip $t.o << 100 fi << 101 << 102 if [ "$ARCH" = "loongarch" ]; then << 103 ${CROSS_COMPILE}strip $t.o << 104 fi 87 fi 105 88 106 if [ $pc_sub -ne 0 ]; then !! 89 ${CROSS_COMPILE}objdump $OBJDUMPFLAGS -S $1.o | \ 107 if [ $PC ]; then !! 90 grep -v "/tmp\|Disassembly\|\.text\|^$" > $1.dis 2>&1 108 adj_vma=$(( $PC - $pc_ << 109 OBJDUMPFLAGS="$OBJDUMP << 110 fi << 111 fi << 112 << 113 ${CROSS_COMPILE}objdump $OBJDUMPFLAGS << 114 grep -v "/tmp\|Disassembly\|\. << 115 } << 116 << 117 # Match the maximum number of opcode bytes fro << 118 # @opline << 119 # << 120 # Params: << 121 # @op_bytes: The string of bytes from the Code << 122 # @opline: The disassembled line coming from o << 123 # << 124 # Returns: << 125 # The max number of opcode bytes from the begi << 126 # the opcode bytes in the objdump line. << 127 get_substr_opcode_bytes_num() << 128 { << 129 local op_bytes=$1 << 130 local opline=$2 << 131 << 132 local retval=0 << 133 substr="" << 134 << 135 for opc in $op_bytes; << 136 do << 137 substr+="$opc" << 138 << 139 opcode="$substr" << 140 if [ "$ARCH" = "riscv" ]; then << 141 opcode=$(echo $opcode << 142 fi << 143 << 144 # return if opcode bytes do no << 145 if ! echo $opline | grep -q "$ << 146 then << 147 break << 148 fi << 149 << 150 # add trailing space << 151 substr+=" " << 152 retval=$((retval+1)) << 153 done << 154 << 155 return $retval << 156 } << 157 << 158 # Return the line number in objdump output to << 159 # line points to << 160 # << 161 # Params: << 162 # @all_code: code in bytes without the marker << 163 # @dis_file: disassembled file << 164 # @ip_byte: The byte to which the IP points to << 165 get_faultlinenum() << 166 { << 167 local all_code="$1" << 168 local dis_file="$2" << 169 << 170 # num bytes including IP byte << 171 local num_bytes_ip=$(( $3 + 1 * $width << 172 << 173 # Add the two header lines (we're coun << 174 local retval=3 << 175 << 176 # remove marker << 177 all_code=$(echo $all_code | sed -e 's/ << 178 << 179 while read line << 180 do << 181 get_substr_opcode_bytes_num "$ << 182 ate_opcodes=$? << 183 << 184 if ! (( $ate_opcodes )); then << 185 continue << 186 fi << 187 << 188 num_bytes_ip=$((num_bytes_ip - << 189 if (( $num_bytes_ip <= 0 )); t << 190 break << 191 fi << 192 << 193 # Delete matched opcode bytes << 194 # how many chars those opcodes << 195 # trailing space. << 196 # << 197 # a byte is 2 chars, ate_opcod << 198 # spaces << 199 del_chars=$(( ($ate_opcodes * << 200 << 201 all_code=$(echo $all_code | se << 202 << 203 let "retval+=1" << 204 << 205 done < $dis_file << 206 << 207 return $retval << 208 } 91 } 209 92 210 marker=`expr index "$code" "\<"` 93 marker=`expr index "$code" "\<"` 211 if [ $marker -eq 0 ]; then 94 if [ $marker -eq 0 ]; then 212 marker=`expr index "$code" "\("` 95 marker=`expr index "$code" "\("` 213 fi 96 fi 214 97 215 touch $T.oo 98 touch $T.oo 216 if [ $marker -ne 0 ]; then 99 if [ $marker -ne 0 ]; then 217 # How many bytes to subtract from the << 218 # in order to get to the beginning vir << 219 # Code: << 220 pc_sub=$(( (($marker - 1) / (2 * $widt << 221 echo All code >> $T.oo 100 echo All code >> $T.oo 222 echo ======== >> $T.oo 101 echo ======== >> $T.oo 223 beforemark=`echo "$code"` 102 beforemark=`echo "$code"` 224 echo -n " .$type 0x" > $T.s 103 echo -n " .$type 0x" > $T.s 225 << 226 echo $beforemark | sed -e 's/ /,0x/g; 104 echo $beforemark | sed -e 's/ /,0x/g; s/[<>()]//g' >> $T.s 227 !! 105 disas $T 228 disas $T $pc_sub << 229 << 230 cat $T.dis >> $T.oo 106 cat $T.dis >> $T.oo >> 107 rm -f $T.o $T.s $T.dis 231 108 232 get_faultlinenum "$code" "$T.dis" $pc_ !! 109 # and fix code at-and-after marker 233 faultlinenum=$? << 234 << 235 # and fix code at-and-after marker << 236 code=`echo "$code" | cut -c$((${marker 110 code=`echo "$code" | cut -c$((${marker} + 1))-` 237 << 238 rm -f $T.o $T.s $T.dis << 239 fi 111 fi 240 << 241 echo Code starting with the faulting instructi 112 echo Code starting with the faulting instruction > $T.aa 242 echo ========================================= 113 echo =========================================== >> $T.aa 243 code=`echo $code | sed -e 's/\r//;s/ [<(]/ /;s !! 114 code=`echo $code | sed -e 's/ [<(]/ /;s/[>)] / /;s/ /,0x/g; s/[>)]$//'` 244 echo -n " .$type 0x" > $T.s 115 echo -n " .$type 0x" > $T.s 245 echo $code >> $T.s 116 echo $code >> $T.s 246 disas $T 0 !! 117 disas $T 247 cat $T.dis >> $T.aa 118 cat $T.dis >> $T.aa >> 119 >> 120 # (lines of whole $T.oo) - (lines of $T.aa, i.e. "Code starting") + 3, >> 121 # i.e. the title + the "===..=" line (sed is counting from 1, 0 address is >> 122 # special) >> 123 faultlinenum=$(( $(wc -l $T.oo | cut -d" " -f1) - \ >> 124 $(wc -l $T.aa | cut -d" " -f1) + 3)) >> 125 >> 126 faultline=`cat $T.dis | head -1 | cut -d":" -f2-` >> 127 faultline=`echo "$faultline" | sed -e 's/\[/\\\[/g; s/\]/\\\]/g'` 248 128 249 cat $T.oo | sed -e "${faultlinenum}s/^$[^:]*: 129 cat $T.oo | sed -e "${faultlinenum}s/^\([^:]*:$$.*$/\1\*\2\t\t<-- trapping instruction/" 250 echo 130 echo 251 cat $T.aa 131 cat $T.aa 252 cleanup 132 cleanup

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TOMOYO Linux Cross Reference
Linux/scripts/decodecode

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Differences between /scripts/decodecode (Version linux-6.12-rc7) and /scripts/decodecode (Version linux-5.9.16)

TOMOYO Linux Cross Reference Linux/scripts/decodecode

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Differences between /scripts/decodecode (Version linux-6.12-rc7) and /scripts/decodecode (Version linux-5.9.16)

TOMOYO Linux Cross Reference
Linux/scripts/decodecode