Linux/scripts/faddr2line

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/bash 2 # SPDX-License-Identifier: GPL-2.0 << 3 # 2 # 4 # Translate stack dump function offsets. 3 # Translate stack dump function offsets. 5 # 4 # 6 # addr2line doesn't work with KASLR addresses. 5 # addr2line doesn't work with KASLR addresses. This works similarly to 7 # addr2line, but instead takes the 'func+0x123 6 # addr2line, but instead takes the 'func+0x123' format as input: 8 # 7 # 9 # $ ./scripts/faddr2line ~/k/vmlinux meminfo 8 # $ ./scripts/faddr2line ~/k/vmlinux meminfo_proc_show+0x5/0x568 10 # meminfo_proc_show+0x5/0x568: 9 # meminfo_proc_show+0x5/0x568: 11 # meminfo_proc_show at fs/proc/meminfo.c:27 10 # meminfo_proc_show at fs/proc/meminfo.c:27 12 # 11 # 13 # If the address is part of an inlined functio 12 # If the address is part of an inlined function, the full inline call chain is 14 # printed: 13 # printed: 15 # 14 # 16 # $ ./scripts/faddr2line ~/k/vmlinux native_ 15 # $ ./scripts/faddr2line ~/k/vmlinux native_write_msr+0x6/0x27 17 # native_write_msr+0x6/0x27: 16 # native_write_msr+0x6/0x27: 18 # arch_static_branch at arch/x86/include/asm 17 # arch_static_branch at arch/x86/include/asm/msr.h:121 19 # (inlined by) static_key_false at include/ 18 # (inlined by) static_key_false at include/linux/jump_label.h:125 20 # (inlined by) native_write_msr at arch/x86 19 # (inlined by) native_write_msr at arch/x86/include/asm/msr.h:125 21 # 20 # 22 # The function size after the '/' in the input 21 # The function size after the '/' in the input is optional, but recommended. 23 # It's used to help disambiguate any duplicate 22 # It's used to help disambiguate any duplicate symbol names, which can occur 24 # rarely. If the size is omitted for a duplic 23 # rarely. If the size is omitted for a duplicate symbol then it's possible for 25 # multiple code sites to be printed: 24 # multiple code sites to be printed: 26 # 25 # 27 # $ ./scripts/faddr2line ~/k/vmlinux raw_ioc 26 # $ ./scripts/faddr2line ~/k/vmlinux raw_ioctl+0x5 28 # raw_ioctl+0x5/0x20: 27 # raw_ioctl+0x5/0x20: 29 # raw_ioctl at drivers/char/raw.c:122 28 # raw_ioctl at drivers/char/raw.c:122 30 # 29 # 31 # raw_ioctl+0x5/0xb1: 30 # raw_ioctl+0x5/0xb1: 32 # raw_ioctl at net/ipv4/raw.c:876 31 # raw_ioctl at net/ipv4/raw.c:876 33 # 32 # 34 # Multiple addresses can be specified on a sin 33 # Multiple addresses can be specified on a single command line: 35 # 34 # 36 # $ ./scripts/faddr2line ~/k/vmlinux type_sh 35 # $ ./scripts/faddr2line ~/k/vmlinux type_show+0x10/45 free_reserved_area+0x90 37 # type_show+0x10/0x2d: 36 # type_show+0x10/0x2d: 38 # type_show at drivers/video/backlight/backl 37 # type_show at drivers/video/backlight/backlight.c:213 39 # 38 # 40 # free_reserved_area+0x90/0x123: 39 # free_reserved_area+0x90/0x123: 41 # free_reserved_area at mm/page_alloc.c:6429 40 # free_reserved_area at mm/page_alloc.c:6429 (discriminator 2) 42 41 43 42 44 set -o errexit 43 set -o errexit 45 set -o nounset 44 set -o nounset 46 45 >> 46 command -v awk >/dev/null 2>&1 || die "awk isn't installed" >> 47 command -v readelf >/dev/null 2>&1 || die "readelf isn't installed" >> 48 command -v addr2line >/dev/null 2>&1 || die "addr2line isn't installed" >> 49 47 usage() { 50 usage() { 48 echo "usage: faddr2line [--list] <obje !! 51 echo "usage: faddr2line <object file> <func+offset> <func+offset>..." >&2 49 exit 1 52 exit 1 50 } 53 } 51 54 52 warn() { 55 warn() { 53 echo "$1" >&2 56 echo "$1" >&2 54 } 57 } 55 58 56 die() { 59 die() { 57 echo "ERROR: $1" >&2 60 echo "ERROR: $1" >&2 58 exit 1 61 exit 1 59 } 62 } 60 63 61 UTIL_SUFFIX="" << 62 if [[ "${LLVM:-}" == "" ]]; then << 63 UTIL_PREFIX=${CROSS_COMPILE:-} << 64 else << 65 UTIL_PREFIX=llvm- << 66 << 67 if [[ "${LLVM}" == *"/" ]]; then << 68 UTIL_PREFIX=${LLVM}${UTIL_PREF << 69 elif [[ "${LLVM}" == "-"* ]]; then << 70 UTIL_SUFFIX=${LLVM} << 71 fi << 72 fi << 73 << 74 READELF="${UTIL_PREFIX}readelf${UTIL_SUFFIX}" << 75 ADDR2LINE="${UTIL_PREFIX}addr2line${UTIL_SUFFI << 76 AWK="awk" << 77 GREP="grep" << 78 << 79 command -v ${AWK} >/dev/null 2>&1 || die "${AW << 80 command -v ${READELF} >/dev/null 2>&1 || die " << 81 command -v ${ADDR2LINE} >/dev/null 2>&1 || die << 82 << 83 # Try to figure out the source directory prefi 64 # Try to figure out the source directory prefix so we can remove it from the 84 # addr2line output. HACK ALERT: This assumes 65 # addr2line output. HACK ALERT: This assumes that start_kernel() is in 85 # init/main.c! This only works for vmlinux. !! 66 # kernel/init.c! This only works for vmlinux. Otherwise it falls back to 86 # printing the absolute path. 67 # printing the absolute path. 87 find_dir_prefix() { 68 find_dir_prefix() { 88 local start_kernel_addr=$(echo "${ELF_ !! 69 local objfile=$1 89 ${AWK} '$8 == "start_kernel" { !! 70 >> 71 local start_kernel_addr=$(readelf -sW $objfile | awk '$8 == "start_kernel" {printf "0x%s", $2}') 90 [[ -z $start_kernel_addr ]] && return 72 [[ -z $start_kernel_addr ]] && return 91 73 92 run_addr2line ${start_kernel_addr} "" !! 74 local file_line=$(addr2line -e $objfile $start_kernel_addr) 93 [[ -z $ADDR2LINE_OUT ]] && return !! 75 [[ -z $file_line ]] && return 94 76 95 local file_line=${ADDR2LINE_OUT#* at } << 96 if [[ -z $file_line ]] || [[ $file_lin << 97 return << 98 fi << 99 local prefix=${file_line%init/main.c:* 77 local prefix=${file_line%init/main.c:*} 100 if [[ -z $prefix ]] || [[ $prefix = $f 78 if [[ -z $prefix ]] || [[ $prefix = $file_line ]]; then 101 return 79 return 102 fi 80 fi 103 81 104 DIR_PREFIX=$prefix 82 DIR_PREFIX=$prefix 105 return 0 83 return 0 106 } 84 } 107 85 108 run_readelf() { << 109 local objfile=$1 << 110 local out=$(${READELF} --file-header - << 111 << 112 # This assumes that readelf first prin << 113 # Note: It seems that GNU readelf does << 114 # line when multiple options are given << 115 ELF_FILEHEADER=$(echo "${out}" | sed - << 116 ELF_SECHEADERS=$(echo "${out}" | sed - << 117 ELF_SYMS=$(echo "${out}" | sed -n '/Sy << 118 } << 119 << 120 check_vmlinux() { << 121 # vmlinux uses absolute addresses in t << 122 # section offsets. << 123 IS_VMLINUX=0 << 124 local file_type=$(echo "${ELF_FILEHEAD << 125 ${AWK} '$1 == "Type:" { print << 126 if [[ $file_type = "EXEC" ]] || [[ $fi << 127 IS_VMLINUX=1 << 128 fi << 129 } << 130 << 131 init_addr2line() { << 132 local objfile=$1 << 133 << 134 check_vmlinux << 135 << 136 ADDR2LINE_ARGS="--functions --pretty-p << 137 if [[ $IS_VMLINUX = 1 ]]; then << 138 # If the executable file is vm << 139 # addr2line, so we can launch << 140 coproc ADDR2LINE_PROC (${ADDR2 << 141 fi << 142 } << 143 << 144 run_addr2line() { << 145 local addr=$1 << 146 local sec_name=$2 << 147 << 148 if [[ $IS_VMLINUX = 1 ]]; then << 149 # We send to the addr2line pro << 150 # value, i.e., something that << 151 # (i.e., ","). This causes add << 152 # our address, then (2) either << 153 # using binutils' addr2line), << 154 echo ${addr} >& "${ADDR2LINE_P << 155 echo "," >& "${ADDR2LINE_PROC[ << 156 local first_line << 157 read -r first_line <& "${ADDR2 << 158 ADDR2LINE_OUT=$(echo "${first_ << 159 while read -r line <& "${ADDR2 << 160 if [[ "$line" == "?? ? << 161 break << 162 fi << 163 ADDR2LINE_OUT+=$'\n'$( << 164 done << 165 else << 166 # Run addr2line as a single in << 167 local sec_arg << 168 [[ -z $sec_name ]] && sec_arg= << 169 ADDR2LINE_OUT=$(${ADDR2LINE} $ << 170 fi << 171 } << 172 << 173 __faddr2line() { 86 __faddr2line() { 174 local objfile=$1 87 local objfile=$1 175 local func_addr=$2 88 local func_addr=$2 176 local dir_prefix=$3 89 local dir_prefix=$3 177 local print_warnings=$4 90 local print_warnings=$4 178 91 179 local sym_name=${func_addr%+*} !! 92 local func=${func_addr%+*} 180 local func_offset=${func_addr#*+} !! 93 local offset=${func_addr#*+} 181 func_offset=${func_offset%/*} !! 94 offset=${offset%/*} 182 local user_size= !! 95 local size= 183 [[ $func_addr =~ "/" ]] && user_size=$ !! 96 [[ $func_addr =~ "/" ]] && size=${func_addr#*/} 184 97 185 if [[ -z $sym_name ]] || [[ -z $func_o !! 98 if [[ -z $func ]] || [[ -z $offset ]] || [[ $func = $func_addr ]]; then 186 warn "bad func+offset $func_ad 99 warn "bad func+offset $func_addr" 187 DONE=1 100 DONE=1 188 return 101 return 189 fi 102 fi 190 103 191 # Go through each of the object's symb 104 # Go through each of the object's symbols which match the func name. 192 # In rare cases there might be duplica !! 105 # In rare cases there might be duplicates. 193 # matches. !! 106 while read symbol; do 194 while read line; do !! 107 local fields=($symbol) 195 local fields=($line) !! 108 local sym_base=0x${fields[0]} 196 local sym_addr=0x${fields[1]} !! 109 local sym_type=${fields[1]} 197 local sym_elf_size=${fields[2] !! 110 local sym_end=0x${fields[3]} 198 local sym_sec=${fields[6]} << 199 local sec_size << 200 local sec_name << 201 << 202 # Get the section size: << 203 sec_size=$(echo "${ELF_SECHEAD << 204 ${AWK} -v sec=$sym_sec << 205 << 206 if [[ -z $sec_size ]]; then << 207 warn "bad section size << 208 DONE=1 << 209 return << 210 fi << 211 << 212 # Get the section name: << 213 sec_name=$(echo "${ELF_SECHEAD << 214 ${AWK} -v sec=$sym_sec << 215 << 216 if [[ -z $sec_name ]]; then << 217 warn "bad section name << 218 DONE=1 << 219 return << 220 fi << 221 << 222 # Calculate the symbol size. << 223 # << 224 # Unfortunately we can't use t << 225 # also includes the padding by << 226 # kallsyms, the size calculati << 227 # symbol and the next symbol i << 228 local sym_size << 229 local cur_sym_addr << 230 local found=0 << 231 while read line; do << 232 local fields=($line) << 233 cur_sym_addr=0x${field << 234 local cur_sym_elf_size << 235 local cur_sym_name=${f << 236 << 237 # is_mapping_symbol(cu << 238 if [[ ${cur_sym_name} << 239 continue << 240 fi << 241 << 242 if [[ $cur_sym_addr = << 243 [[ $cur_sym_elf_siz << 244 [[ $cur_sym_name = << 245 found=1 << 246 continue << 247 fi << 248 << 249 if [[ $found = 1 ]]; t << 250 sym_size=$(($c << 251 [[ $sym_size - << 252 found=2 << 253 break << 254 fi << 255 done < <(echo "${ELF_SYMS}" | << 256 << 257 if [[ $found = 0 ]]; then << 258 warn "can't find symbo << 259 DONE=1 << 260 return << 261 fi << 262 << 263 # If nothing was found after t << 264 # symbol in the section. << 265 [[ $found = 1 ]] && sym_size=$ << 266 111 >> 112 # calculate the size >> 113 local sym_size=$(($sym_end - $sym_base)) 267 if [[ -z $sym_size ]] || [[ $s 114 if [[ -z $sym_size ]] || [[ $sym_size -le 0 ]]; then 268 warn "bad symbol size: !! 115 warn "bad symbol size: base: $sym_base end: $sym_end" 269 DONE=1 116 DONE=1 270 return 117 return 271 fi 118 fi 272 << 273 sym_size=0x$(printf %x $sym_si 119 sym_size=0x$(printf %x $sym_size) 274 120 275 # Calculate the address from u !! 121 # calculate the address 276 local addr=$(($sym_addr + $fun !! 122 local addr=$(($sym_base + $offset)) 277 if [[ -z $addr ]] || [[ $addr 123 if [[ -z $addr ]] || [[ $addr = 0 ]]; then 278 warn "bad address: $sy !! 124 warn "bad address: $sym_base + $offset" 279 DONE=1 125 DONE=1 280 return 126 return 281 fi 127 fi 282 addr=0x$(printf %x $addr) 128 addr=0x$(printf %x $addr) 283 129 284 # If the user provided a size, !! 130 # weed out non-function symbols 285 if [[ -n $user_size ]] && [[ $ !! 131 if [[ $sym_type != t ]] && [[ $sym_type != T ]]; then 286 [[ $print_warnings = 1 132 [[ $print_warnings = 1 ]] && 287 echo "skipping !! 133 echo "skipping $func address at $addr due to non-function symbol of type '$sym_type'" >> 134 continue >> 135 fi >> 136 >> 137 # if the user provided a size, make sure it matches the symbol's size >> 138 if [[ -n $size ]] && [[ $size -ne $sym_size ]]; then >> 139 [[ $print_warnings = 1 ]] && >> 140 echo "skipping $func address at $addr due to size mismatch ($size != $sym_size)" 288 continue; 141 continue; 289 fi 142 fi 290 143 291 # Make sure the provided offse !! 144 # make sure the provided offset is within the symbol's range 292 if [[ $func_offset -gt $sym_si !! 145 if [[ $offset -gt $sym_size ]]; then 293 [[ $print_warnings = 1 146 [[ $print_warnings = 1 ]] && 294 echo "skipping !! 147 echo "skipping $func address at $addr due to size mismatch ($offset > $sym_size)" 295 continue 148 continue 296 fi 149 fi 297 150 298 # In case of duplicates or mul !! 151 # separate multiple entries with a blank line 299 # cmdline, separate multiple e << 300 [[ $FIRST = 0 ]] && echo 152 [[ $FIRST = 0 ]] && echo 301 FIRST=0 153 FIRST=0 302 154 303 echo "$sym_name+$func_offset/$ !! 155 # pass real address to addr2line 304 !! 156 echo "$func+$offset/$sym_size:" 305 # Pass section address to addr !! 157 addr2line -fpie $objfile $addr | sed "s; $dir_prefix$\./$*; ;" 306 # from the output: << 307 run_addr2line $addr $sec_name << 308 local output=$(echo "${ADDR2LI << 309 [[ -z $output ]] && continue << 310 << 311 # Default output (non --list): << 312 if [[ $LIST = 0 ]]; then << 313 echo "$output" | while << 314 do << 315 echo $line << 316 done << 317 DONE=1; << 318 continue << 319 fi << 320 << 321 # For --list, show each line w << 322 echo "$output" | while read -r << 323 do << 324 echo << 325 echo $line << 326 n=$(echo $line | sed ' << 327 n1=$[$n-5] << 328 n2=$[$n+5] << 329 f=$(echo $line | sed ' << 330 ${AWK} 'NR>=strtonum(" << 331 done << 332 << 333 DONE=1 158 DONE=1 334 159 335 done < <(echo "${ELF_SYMS}" | sed 's/\ !! 160 done < <(nm -n $objfile | awk -v fn=$func '$3 == fn { found=1; line=$0; start=$1; next } found == 1 { found=0; print line, $1 }') 336 } 161 } 337 162 338 [[ $# -lt 2 ]] && usage 163 [[ $# -lt 2 ]] && usage 339 164 340 objfile=$1 165 objfile=$1 341 << 342 LIST=0 << 343 [[ "$objfile" == "--list" ]] && LIST=1 && shif << 344 << 345 [[ ! -f $objfile ]] && die "can't find objfile 166 [[ ! -f $objfile ]] && die "can't find objfile $objfile" 346 shift 167 shift 347 168 348 run_readelf $objfile << 349 << 350 echo "${ELF_SECHEADERS}" | ${GREP} -q '\.debug << 351 << 352 init_addr2line $objfile << 353 << 354 DIR_PREFIX=supercalifragilisticexpialidocious 169 DIR_PREFIX=supercalifragilisticexpialidocious 355 find_dir_prefix !! 170 find_dir_prefix $objfile 356 171 357 FIRST=1 172 FIRST=1 358 while [[ $# -gt 0 ]]; do 173 while [[ $# -gt 0 ]]; do 359 func_addr=$1 174 func_addr=$1 360 shift 175 shift 361 176 362 # print any matches found 177 # print any matches found 363 DONE=0 178 DONE=0 364 __faddr2line $objfile $func_addr $DIR_ 179 __faddr2line $objfile $func_addr $DIR_PREFIX 0 365 180 366 # if no match was found, print warning 181 # if no match was found, print warnings 367 if [[ $DONE = 0 ]]; then 182 if [[ $DONE = 0 ]]; then 368 __faddr2line $objfile $func_ad 183 __faddr2line $objfile $func_addr $DIR_PREFIX 1 369 warn "no match for $func_addr" 184 warn "no match for $func_addr" 370 fi 185 fi 371 done 186 done

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TOMOYO Linux Cross Reference
Linux/scripts/faddr2line

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Differences between /scripts/faddr2line (Version linux-6.12-rc7) and /scripts/faddr2line (Version linux-4.11.12)

TOMOYO Linux Cross Reference Linux/scripts/faddr2line

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Differences between /scripts/faddr2line (Version linux-6.12-rc7) and /scripts/faddr2line (Version linux-4.11.12)

TOMOYO Linux Cross Reference
Linux/scripts/faddr2line