1*53ee8cc1Swenshuai.xi#!/bin/sh -x 2*53ee8cc1Swenshuai.xi# Based on the vmlinux file create the System.map file 3*53ee8cc1Swenshuai.xi# System.map is used by module-init tools and some debugging 4*53ee8cc1Swenshuai.xi# tools to retrieve the actual addresses of symbols in the kernel. 5*53ee8cc1Swenshuai.xi# 6*53ee8cc1Swenshuai.xi# Usage 7*53ee8cc1Swenshuai.xi# mksysmap vmlinux System.map 8*53ee8cc1Swenshuai.xi 9*53ee8cc1Swenshuai.xi 10*53ee8cc1Swenshuai.xi##### 11*53ee8cc1Swenshuai.xi# Generate System.map (actual filename passed as second argument) 12*53ee8cc1Swenshuai.xi 13*53ee8cc1Swenshuai.xi# $NM produces the following output: 14*53ee8cc1Swenshuai.xi# f0081e80 T alloc_vfsmnt 15*53ee8cc1Swenshuai.xi 16*53ee8cc1Swenshuai.xi# The second row specify the type of the symbol: 17*53ee8cc1Swenshuai.xi# A = Absolute 18*53ee8cc1Swenshuai.xi# B = Uninitialised data (.bss) 19*53ee8cc1Swenshuai.xi# C = Comon symbol 20*53ee8cc1Swenshuai.xi# D = Initialised data 21*53ee8cc1Swenshuai.xi# G = Initialised data for small objects 22*53ee8cc1Swenshuai.xi# I = Indirect reference to another symbol 23*53ee8cc1Swenshuai.xi# N = Debugging symbol 24*53ee8cc1Swenshuai.xi# R = Read only 25*53ee8cc1Swenshuai.xi# S = Uninitialised data for small objects 26*53ee8cc1Swenshuai.xi# T = Text code symbol 27*53ee8cc1Swenshuai.xi# U = Undefined symbol 28*53ee8cc1Swenshuai.xi# V = Weak symbol 29*53ee8cc1Swenshuai.xi# W = Weak symbol 30*53ee8cc1Swenshuai.xi# Corresponding small letters are local symbols 31*53ee8cc1Swenshuai.xi 32*53ee8cc1Swenshuai.xi# For System.map filter away: 33*53ee8cc1Swenshuai.xi# a - local absolute symbols 34*53ee8cc1Swenshuai.xi# U - undefined global symbols 35*53ee8cc1Swenshuai.xi# N - debugging symbols 36*53ee8cc1Swenshuai.xi# w - local weak symbols 37*53ee8cc1Swenshuai.xi 38*53ee8cc1Swenshuai.xi# readprofile starts reading symbols when _stext is found, and 39*53ee8cc1Swenshuai.xi# continue until it finds a symbol which is not either of 'T', 't', 40*53ee8cc1Swenshuai.xi# 'W' or 'w'. __crc_ are 'A' and placed in the middle 41*53ee8cc1Swenshuai.xi# so we just ignore them to let readprofile continue to work. 42*53ee8cc1Swenshuai.xi# (At least sparc64 has __crc_ in the middle). 43*53ee8cc1Swenshuai.xi 44*53ee8cc1Swenshuai.xi$NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2 45*53ee8cc1Swenshuai.xi 46