[thirdparty/kernel/linux.git] / scripts / objdump-func

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Disassemble a single function.
#
# usage: objdump-func <file> <func> [<func> ...]

set -o errexit
set -o nounset

OBJDUMP="${CROSS_COMPILE:-}objdump"

command -v gawk >/dev/null 2>&1 || die "gawk isn't installed"

usage() {
	echo "usage: objdump-func <file> <func> [<func> ...]" >&2
	exit 1
}

[[ $# -lt 2 ]] && usage

OBJ=$1; shift
FUNCS=("$@")

${OBJDUMP} -wdr $OBJ | gawk -M -v _funcs="${FUNCS[*]}" '
	BEGIN { split(_funcs, funcs); }
	/^$/ { func_match=0; }
	/<.*>:/ {
		f = gensub(/.*<(.*)>:/, "\\1", 1);
		for (i in funcs) {
			# match compiler-added suffixes like ".cold", etc
			if (f ~ "^" funcs[i] "(\\..*)?") {
				func_match = 1;
				base = strtonum("0x" $1);
				break;
			}
		}
	}
	{
		if (func_match) {
			addr = strtonum("0x" $1);
			printf("%04x ", addr - base);
			print;
		}
	}'
Commit	Line	Data
21e35023 JP	1	#!/bin/bash
	2	# SPDX-License-Identifier: GPL-2.0
	3	#
	4	# Disassemble a single function.
	5	#
27d000d6	6	# usage: objdump-func <file> <func> [<func> ...]
21e35023 JP	7
	8	set -o errexit
	9	set -o nounset
	10
	11	OBJDUMP="${CROSS_COMPILE:-}objdump"
	12
	13	command -v gawk >/dev/null 2>&1 \|\| die "gawk isn't installed"
	14
	15	usage() {
27d000d6	16	echo "usage: objdump-func <file> <func> [<func> ...]" >&2
21e35023 JP	17	exit 1
	18	}
	19
	20	[[ $# -lt 2 ]] && usage
	21
	22	OBJ=$1; shift
27d000d6 JP	23	FUNCS=("$@")
	24
	25	${OBJDUMP} -wdr $OBJ \| gawk -M -v _funcs="${FUNCS[*]}" '
	26	BEGIN { split(_funcs, funcs); }
	27	/^$/ { func_match=0; }
	28	/<.*>:/ {
	29	f = gensub(/.<(.)>:/, "\\1", 1);
	30	for (i in funcs) {
	31	# match compiler-added suffixes like ".cold", etc
	32	if (f ~ "^" funcs[i] "(\\..*)?") {
	33	func_match = 1;
	34	base = strtonum("0x" $1);
	35	break;
	36	}
	37	}
	38	}
	39	{
	40	if (func_match) {
	41	addr = strtonum("0x" $1);
	42	printf("%04x ", addr - base);
	43	print;
	44	}
	45	}'