1*21e35023SJosh Poimboeuf#!/bin/bash 2*21e35023SJosh Poimboeuf# SPDX-License-Identifier: GPL-2.0 3*21e35023SJosh Poimboeuf# 4*21e35023SJosh Poimboeuf# Disassemble a single function. 5*21e35023SJosh Poimboeuf# 6*21e35023SJosh Poimboeuf# usage: objdump-func <file> <func> 7*21e35023SJosh Poimboeuf 8*21e35023SJosh Poimboeufset -o errexit 9*21e35023SJosh Poimboeufset -o nounset 10*21e35023SJosh Poimboeuf 11*21e35023SJosh PoimboeufOBJDUMP="${CROSS_COMPILE:-}objdump" 12*21e35023SJosh Poimboeuf 13*21e35023SJosh Poimboeufcommand -v gawk >/dev/null 2>&1 || die "gawk isn't installed" 14*21e35023SJosh Poimboeuf 15*21e35023SJosh Poimboeufusage() { 16*21e35023SJosh Poimboeuf echo "usage: objdump-func <file> <func>" >&2 17*21e35023SJosh Poimboeuf exit 1 18*21e35023SJosh Poimboeuf} 19*21e35023SJosh Poimboeuf 20*21e35023SJosh Poimboeuf[[ $# -lt 2 ]] && usage 21*21e35023SJosh Poimboeuf 22*21e35023SJosh PoimboeufOBJ=$1; shift 23*21e35023SJosh PoimboeufFUNC=$1; shift 24*21e35023SJosh Poimboeuf 25*21e35023SJosh Poimboeuf# Secret feature to allow adding extra objdump args at the end 26*21e35023SJosh PoimboeufEXTRA_ARGS=$@ 27*21e35023SJosh Poimboeuf 28*21e35023SJosh Poimboeuf# Note this also matches compiler-added suffixes like ".cold", etc 29*21e35023SJosh Poimboeuf${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