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authorSascha Hauer <s.hauer@pengutronix.de>2007-07-05 18:01:14 +0200
committerSascha Hauer <sha@octopus.labnet.pengutronix.de>2007-07-05 18:01:14 +0200
commit75f79f014c52ec6ad286c014aa5ba4881de3c0f6 (patch)
tree463003d54230573bc6ff42dbeae4958d6b46a6d5 /scripts
parent51eb67650f5c546750f9414496160f993da02477 (diff)
downloadbarebox-75f79f014c52ec6ad286c014aa5ba4881de3c0f6.tar.gz
barebox-75f79f014c52ec6ad286c014aa5ba4881de3c0f6.tar.xz
svn_rev_019
missing for kbuild
Diffstat (limited to 'scripts')
-rw-r--r--scripts/mksysmap44
1 files changed, 44 insertions, 0 deletions
diff --git a/scripts/mksysmap b/scripts/mksysmap
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+#!/bin/sh -x
+# Based on the vmlinux file create the System.map file
+# System.map is used by module-init tools and some debugging
+# tools to retrieve the actual addresses of symbols in the kernel.
+#
+# Usage
+# mksysmap vmlinux System.map
+
+
+#####
+# Generate System.map (actual filename passed as second argument)
+
+# $NM produces the following output:
+# f0081e80 T alloc_vfsmnt
+
+# The second row specify the type of the symbol:
+# A = Absolute
+# B = Uninitialised data (.bss)
+# C = Comon symbol
+# D = Initialised data
+# G = Initialised data for small objects
+# I = Indirect reference to another symbol
+# N = Debugging symbol
+# R = Read only
+# S = Uninitialised data for small objects
+# T = Text code symbol
+# U = Undefined symbol
+# V = Weak symbol
+# W = Weak symbol
+# Corresponding small letters are local symbols
+
+# For System.map filter away:
+# a - local absolute symbols
+# U - undefined global symbols
+# w - local weak symbols
+
+# readprofile starts reading symbols when _stext is found, and
+# continue until it finds a symbol which is not either of 'T', 't',
+# 'W' or 'w'. __crc_ are 'A' and placed in the middle
+# so we just ignore them to let readprofile continue to work.
+# (At least sparc64 has __crc_ in the middle).
+
+$NM -n $1 | grep -v '\( [aUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2
+