linux-6.12.1/scripts/faddr2line

2 # SPDX-License-Identifier: GPL-2.0
7 # addr2line, but instead takes the 'func+0x123' format as input:
9 #   $ ./scripts/faddr2line ~/k/vmlinux meminfo_proc_show+0x5/0x568
10 #   meminfo_proc_show+0x5/0x568:
16 #   $ ./scripts/faddr2line ~/k/vmlinux native_write_msr+0x6/0x27
17 #   native_write_msr+0x6/0x27:
24 # rarely.  If the size is omitted for a duplicate symbol then it's possible for
27 #   $ ./scripts/faddr2line ~/k/vmlinux raw_ioctl+0x5
28 #   raw_ioctl+0x5/0x20:
31 #   raw_ioctl+0x5/0xb1:
34 # Multiple addresses can be specified on a single command line:
36 #   $ ./scripts/faddr2line ~/k/vmlinux type_show+0x10/45 free_reserved_area+0x90
37 #   type_show+0x10/0x2d:
40 #   free_reserved_area+0x90/0x123:
44 set -o errexit
45 set -o nounset
48 	echo "usage: faddr2line [--list] <object file> <func+offset> <func+offset>..." >&2
62 if [[ "${LLVM:-}" == "" ]]; then
63 	UTIL_PREFIX=${CROSS_COMPILE:-}
65 	UTIL_PREFIX=llvm-
69 	elif [[ "${LLVM}" == "-"* ]]; then
79 command -v ${AWK} >/dev/null 2>&1 || die "${AWK} isn't installed"
80 command -v ${READELF} >/dev/null 2>&1 || die "${READELF} isn't installed"
81 command -v ${ADDR2LINE} >/dev/null 2>&1 || die "${ADDR2LINE} isn't installed"
89 		${AWK} '$8 == "start_kernel" {printf "0x%s", $2}')
90 	[[ -z $start_kernel_addr ]] && return
93 	[[ -z $ADDR2LINE_OUT ]] && return
96 	if [[ -z $file_line ]] || [[ $file_line = $ADDR2LINE_OUT ]]; then
100 	if [[ -z $prefix ]] || [[ $prefix = $file_line ]]; then
105 	return 0
110 	local out=$(${READELF} --file-header --section-headers --symbols --wide $objfile)
115 …ELF_FILEHEADER=$(echo "${out}" | sed -n '/There are [0-9]* section headers, starting at offset\|Se…
116 … "${out}" | sed -n '/There are [0-9]* section headers, starting at offset\|Section Headers:/,$p' |…
117 	ELF_SYMS=$(echo "${out}" | sed -n '/Symbol table .* contains [0-9]* entries:/,$p')
123 	IS_VMLINUX=0
136 	ADDR2LINE_ARGS="--functions --pretty-print --inlines --addresses --exe=$objfile"
139 		# addr2line, so we can launch it now as a single long-running process.
149 		# We send to the addr2line process: (1) the address, then (2) a sentinel
150 		# value, i.e., something that can't be interpreted as a valid address
152 		# our address, then (2) either "?? ??:0" or "0x0...0: ..." (if
157 		read -r first_line <& "${ADDR2LINE_PROC[0]}"
158 		ADDR2LINE_OUT=$(echo "${first_line}" | sed 's/^0x[0-9a-fA-F]*: //')
159 		while read -r line <& "${ADDR2LINE_PROC[0]}"; do
160 …if [[ "$line" == "?? ??:0" ]] || [[ "$line" == "," ]] || [[ $(echo "$line" | ${GREP} "^0x00*: ") ]…
163 			ADDR2LINE_OUT+=$'\n'$(echo "$line" | sed 's/^0x[0-9a-fA-F]*: //')
166 		# Run addr2line as a single invocation.
168 		[[ -z $sec_name ]] && sec_arg="" || sec_arg="--section=${sec_name}"
169 		ADDR2LINE_OUT=$(${ADDR2LINE} ${ADDR2LINE_ARGS} ${sec_arg} ${addr} | sed 's/^0x[0-9a-fA-F]*: //')
185 	if [[ -z $sym_name ]] || [[ -z $func_offset ]] || [[ $sym_name = $func_addr ]]; then
196 		local sym_addr=0x${fields[1]}
204 			${AWK} -v sec=$sym_sec '$1 == "[" sec "]" { print "0x" $6; exit }')
206 		if [[ -z $sec_size ]]; then
214 			${AWK} -v sec=$sym_sec '$1 == "[" sec "]" { print $2; exit }')
216 		if [[ -z $sec_name ]]; then
227 		# symbol and the next symbol in a sorted list.
230 		local found=0
233 			cur_sym_addr=0x${fields[1]}
235 			local cur_sym_name=${fields[7]:-}
250 				sym_size=$(($cur_sym_addr - $sym_addr))
251 				[[ $sym_size -lt $sym_elf_size ]] && continue;
255 …"${ELF_SYMS}" | sed 's/\[.*\]//' | ${AWK} -v sec=$sym_sec '$7 == sec' | sort --key=2 | ${GREP} -A1…
257 		if [[ $found = 0 ]]; then
265 		[[ $found = 1 ]] && sym_size=$(($sec_size - $sym_addr))
267 		if [[ -z $sym_size ]] || [[ $sym_size -le 0 ]]; then
273 		sym_size=0x$(printf %x $sym_size)
275 		# Calculate the address from user-supplied offset:
277 		if [[ -z $addr ]] || [[ $addr = 0 ]]; then
282 		addr=0x$(printf %x $addr)
284 		# If the user provided a size, make sure it matches the symbol's size:
285 		if [[ -n $user_size ]] && [[ $user_size -ne $sym_size ]]; then
292 		if [[ $func_offset -gt $sym_size ]]; then
299 		# cmdline, separate multiple entries with a blank line:
300 		[[ $FIRST = 0 ]] && echo
301 		FIRST=0
309 		[[ -z $output ]] && continue
311 		# Default output (non --list):
312 		if [[ $LIST = 0 ]]; then
313 			echo "$output" | while read -r line
321 		# For --list, show each line with its corresponding source code:
322 		echo "$output" | while read -r line
326 			n=$(echo $line | sed 's/.*:\([0-9]\+\).*/\1/g')
327 			n1=$[$n-5]
330 …num("'$n2'") { if (NR=='$n') printf(">%d<", NR); else printf(" %d ", NR); printf("\t%s\n", $0)}' $f
335 	done < <(echo "${ELF_SYMS}" | sed 's/\[.*\]//' | ${AWK} -v fn=$sym_name '$8 == fn')
338 [[ $# -lt 2 ]] && usage
342 LIST=0
343 [[ "$objfile" == "--list" ]] && LIST=1 && shift && objfile=$1
345 [[ ! -f $objfile ]] && die "can't find objfile $objfile"
350 echo "${ELF_SECHEADERS}" | ${GREP} -q '\.debug_info' || die "CONFIG_DEBUG_INFO not enabled"
358 while [[ $# -gt 0 ]]; do
363 	DONE=0
364 	__faddr2line $objfile $func_addr $DIR_PREFIX 0
367 	if [[ $DONE = 0 ]]; then