1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 4# Disassemble a single function. 5# 6# usage: objdump-func <file> <func> 7 8set -o errexit 9set -o nounset 10 11OBJDUMP="${CROSS_COMPILE:-}objdump" 12 13command -v gawk >/dev/null 2>&1 || die "gawk isn't installed" 14 15usage() { 16 echo "usage: objdump-func <file> <func>" >&2 17 exit 1 18} 19 20[[ $# -lt 2 ]] && usage 21 22OBJ=$1; shift 23FUNC=$1; shift 24 25# Secret feature to allow adding extra objdump args at the end 26EXTRA_ARGS=$@ 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; } }' 30