[linux-block.git] / scripts / objdump-func

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Disassemble a single function.
#
# usage: objdump-func <file> <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>" >&2
	exit 1
}

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

OBJ=$1; shift
FUNC=$1; shift

# Secret feature to allow adding extra objdump args at the end
EXTRA_ARGS=$@

# Note this also matches compiler-added suffixes like ".cold", etc
${OBJDUMP} -wdr $EXTRA_ARGS $OBJ | gawk -M -v f=$FUNC '/^$/ { P=0; } $0 ~ "<" f "(\\..*)?>:" { P=1; O=strtonum("0x" $1); } { if (P) { o=strtonum("0x" $1); printf("%04x ", o-O); print $0; } }'
Commit	Line	Data
21e35023 JP	1	#!/bin/bash
	2	# SPDX-License-Identifier: GPL-2.0
	3	#
	4	# Disassemble a single function.
	5	#
	6	# usage: objdump-func <file> <func>
	7
	8	set -o errexit
	9	set -o nounset
	10
	11	OBJDUMP="${CROSS_COMPILE:-}objdump"
	12
	13	command -v gawk >/dev/null 2>&1 \|\| die "gawk isn't installed"
	14
	15	usage() {
	16	echo "usage: objdump-func <file> <func>" >&2
	17	exit 1
	18	}
	19
	20	[[ $# -lt 2 ]] && usage
	21
	22	OBJ=$1; shift
	23	FUNC=$1; shift
	24
	25	# Secret feature to allow adding extra objdump args at the end
	26	EXTRA_ARGS=$@
	27
	28	# Note this also matches compiler-added suffixes like ".cold", etc
	29	${OBJDUMP} -wdr $EXTRA_ARGS $OBJ \| gawk -M -v f=$FUNC '/^$/ { P=0; } $0 ~ "<" f "(\\..*)?>:" { P=1; O=strtonum("0x" $1); } { if (P) { o=strtonum("0x" $1); printf("%04x ", o-O); print $0; } }'