1#!/bin/sh -x 2# Based on the vmlinux file create the System.map file 3# System.map is used by module-init tools and some debugging 4# tools to retrieve the actual addresses of symbols in the kernel. 5# 6# Usage 7# mksysmap vmlinux System.map 8 9 10##### 11# Generate System.map (actual filename passed as second argument) 12 13# $NM produces the following output: 14# f0081e80 T alloc_vfsmnt 15 16# The second row specify the type of the symbol: 17# A = Absolute 18# B = Uninitialised data (.bss) 19# C = Common symbol 20# D = Initialised data 21# G = Initialised data for small objects 22# I = Indirect reference to another symbol 23# N = Debugging symbol 24# R = Read only 25# S = Uninitialised data for small objects 26# T = Text code symbol 27# U = Undefined symbol 28# V = Weak symbol 29# W = Weak symbol 30# Corresponding small letters are local symbols 31 32# For System.map filter away: 33# a - local absolute symbols 34# U - undefined global symbols 35# N - debugging symbols 36# w - local weak symbols 37 38# readprofile starts reading symbols when _stext is found, and 39# continue until it finds a symbol which is not either of 'T', 't', 40# 'W' or 'w'. __crc_ are 'A' and placed in the middle 41# so we just ignore them to let readprofile continue to work. 42# (At least sparc64 has __crc_ in the middle). 43 44$NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2 45 46