diff options
Diffstat (limited to '')
-rwxr-xr-x | scripts/mksysmap | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/scripts/mksysmap b/scripts/mksysmap new file mode 100755 index 000000000..16a08b8ef --- /dev/null +++ b/scripts/mksysmap @@ -0,0 +1,60 @@ +#!/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 = Common 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 +# N - debugging 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'. +# +# Ignored prefixes: +# $ - local symbols for ARM, MIPS, etc. +# .L - local labels, .LBB,.Ltmpxxx,.L__unnamed_xx,.LASANPC, etc. +# __crc_ - modversions +# __kstrtab_ - EXPORT_SYMBOL (symbol name) +# __kstrtabns_ - EXPORT_SYMBOL (namespace) +# +# Ignored symbols: +# L0 - for LoongArch? + +$NM -n $1 | grep -v \ + -e ' [aNUw] ' \ + -e ' \$' \ + -e ' \.L' \ + -e ' __crc_' \ + -e ' __kstrtab_' \ + -e ' __kstrtabns_' \ + -e ' L0$' \ +> $2 |