busybox/scripts/showasm

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#!/bin/sh
# Copyright 2006 Rob Landley <rob@landley.net>
# Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
# Dumb little utility function to print out the assembly dump of a single
# function, or list the functions so dumpable in an executable. You'd think
# there would be a way to get objdump to do this, but I can't find it.
[ $# -lt 1 ] || [ $# -gt 2 ] && { echo "usage: showasm file function"; exit 1; }
[ ! -f $1 ] && { echo "File $1 not found"; exit 1; }
if [ $# -eq 1 ]
then
objdump -d $1 | sed -n -e 's/^[0-9a-fA-F]* <\(.*\)>:$/\1/p'
exit 0
fi
objdump -d $1 | sed -n -e '/./{H;$!d}' -e "x;/^.[0-9a-fA-F]* <$2>:/p"