1*1da177e4SLinus Torvalds#!/bin/sh -x 2*1da177e4SLinus Torvalds# Based on the vmlinux file create the System.map file 3*1da177e4SLinus Torvalds# System.map is used by module-init tools and some debugging 4*1da177e4SLinus Torvalds# tools to retreive the actual addresses of symbols in the kernel. 5*1da177e4SLinus Torvalds# 6*1da177e4SLinus Torvalds# Usage 7*1da177e4SLinus Torvalds# mksysmap vmlinux System.map 8*1da177e4SLinus Torvalds 9*1da177e4SLinus Torvalds 10*1da177e4SLinus Torvalds##### 11*1da177e4SLinus Torvalds# Generate System.map (actual filename passed as second argument) 12*1da177e4SLinus Torvalds 13*1da177e4SLinus Torvalds# $NM produces the following output: 14*1da177e4SLinus Torvalds# f0081e80 T alloc_vfsmnt 15*1da177e4SLinus Torvalds 16*1da177e4SLinus Torvalds# The second row specify the type of the symbol: 17*1da177e4SLinus Torvalds# A = Absolute 18*1da177e4SLinus Torvalds# B = Uninitialised data (.bss) 19*1da177e4SLinus Torvalds# C = Comon symbol 20*1da177e4SLinus Torvalds# D = Initialised data 21*1da177e4SLinus Torvalds# G = Initialised data for small objects 22*1da177e4SLinus Torvalds# I = Indirect reference to another symbol 23*1da177e4SLinus Torvalds# N = Debugging symbol 24*1da177e4SLinus Torvalds# R = Read only 25*1da177e4SLinus Torvalds# S = Uninitialised data for small objects 26*1da177e4SLinus Torvalds# T = Text code symbol 27*1da177e4SLinus Torvalds# U = Undefined symbol 28*1da177e4SLinus Torvalds# V = Weak symbol 29*1da177e4SLinus Torvalds# W = Weak symbol 30*1da177e4SLinus Torvalds# Corresponding small letters are local symbols 31*1da177e4SLinus Torvalds 32*1da177e4SLinus Torvalds# For System.map filter away: 33*1da177e4SLinus Torvalds# a - local absolute symbols 34*1da177e4SLinus Torvalds# U - undefined global symbols 35*1da177e4SLinus Torvalds# w - local weak symbols 36*1da177e4SLinus Torvalds 37*1da177e4SLinus Torvalds# readprofile starts reading symbols when _stext is found, and 38*1da177e4SLinus Torvalds# continue until it finds a symbol which is not either of 'T', 't', 39*1da177e4SLinus Torvalds# 'W' or 'w'. __crc_ are 'A' and placed in the middle 40*1da177e4SLinus Torvalds# so we just ignore them to let readprofile continue to work. 41*1da177e4SLinus Torvalds# (At least sparc64 has __crc_ in the middle). 42*1da177e4SLinus Torvalds 43*1da177e4SLinus Torvalds$NM -n $1 | grep -v '\( [aUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2 44*1da177e4SLinus Torvalds 45