mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Sam Ravnborg](/assets/img/avatar_default.png)
Andi Kleen <andi@firstfloor.org> reported that he saw a lot of symbols like this: 0000000000000b24 N DW.aio.h.903a6d92.2 0000000000000bce N DW.task_io_accounting.h.8d8de327.0 0000000000000bec N DW.hrtimer.h.c23659c6.0 in his System.map / kallsyms output. Simple solution is to skip all debugging symbols (they are marked 'N'). Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Paulo Marques <pmarques@grupopie.com>
45 lines
1.3 KiB
Bash
45 lines
1.3 KiB
Bash
#!/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
|
|
# 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'. __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 '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)' > $2
|
|
|