Loading...
1#!/bin/sh -x
2# Based on the vmlinux file create the System.map file
3# System.map is used by module-init tools and some debugging
4# tools to retrieve the actual addresses of symbols in the kernel.
5#
6# Usage
7# mksysmap vmlinux System.map
8
9
10#####
11# Generate System.map (actual filename passed as second argument)
12
13# $NM produces the following output:
14# f0081e80 T alloc_vfsmnt
15
16# The second row specify the type of the symbol:
17# A = Absolute
18# B = Uninitialised data (.bss)
19# C = Common symbol
20# D = Initialised data
21# G = Initialised data for small objects
22# I = Indirect reference to another symbol
23# N = Debugging symbol
24# R = Read only
25# S = Uninitialised data for small objects
26# T = Text code symbol
27# U = Undefined symbol
28# V = Weak symbol
29# W = Weak symbol
30# Corresponding small letters are local symbols
31
32# For System.map filter away:
33# a - local absolute symbols
34# U - undefined global symbols
35# N - debugging symbols
36# w - local weak symbols
37
38# readprofile starts reading symbols when _stext is found, and
39# continue until it finds a symbol which is not either of 'T', 't',
40# 'W' or 'w'.
41#
42# Ignored prefixes:
43# $ - local symbols for ARM, MIPS, etc.
44# .L - local labels, .LBB,.Ltmpxxx,.L__unnamed_xx,.LASANPC, etc.
45# __crc_ - modversions
46# __kstrtab_ - EXPORT_SYMBOL (symbol name)
47# __kstrtabns_ - EXPORT_SYMBOL (namespace)
48#
49# Ignored symbols:
50# L0 - for LoongArch?
51
52$NM -n $1 | grep -v \
53 -e ' [aNUw] ' \
54 -e ' \$' \
55 -e ' \.L' \
56 -e ' __crc_' \
57 -e ' __kstrtab_' \
58 -e ' __kstrtabns_' \
59 -e ' L0$' \
60> $2
1#!/bin/sed -f
2# SPDX-License-Identifier: GPL-2.0-only
3#
4# sed script to filter out symbols that are not needed for System.map,
5# or not suitable for kallsyms. The input should be 'nm -n <file>'.
6#
7# System.map is used by module-init tools and some debugging
8# tools to retrieve the actual addresses of symbols in the kernel.
9#
10# readprofile starts reading symbols when _stext is found, and
11# continue until it finds a symbol which is not either of 'T', 't',
12# 'W' or 'w'.
13#
14# ---------------------------------------------------------------------------
15# Ignored symbol types
16#
17
18# a: local absolute symbols
19# N: debugging symbols
20# U: undefined global symbols
21# w: local weak symbols
22/ [aNUw] /d
23
24# ---------------------------------------------------------------------------
25# Ignored prefixes
26# (do not forget a space before each pattern)
27
28# local symbols for ARM, MIPS, etc.
29/ \$/d
30
31# local labels, .LBB, .Ltmpxxx, .L__unnamed_xx, .LASANPC, etc.
32/ \.L/d
33
34# arm64 EFI stub namespace
35/ __efistub_/d
36
37# arm64 local symbols in PIE namespace
38/ __pi_\\$/d
39/ __pi_\.L/d
40
41# arm64 local symbols in non-VHE KVM namespace
42/ __kvm_nvhe_\$/d
43/ __kvm_nvhe_\.L/d
44
45# lld arm/aarch64/mips thunks
46/ __[[:alnum:]]*Thunk_/d
47
48# CFI type identifiers
49/ __kcfi_typeid_/d
50/ __kvm_nvhe___kcfi_typeid_/d
51/ __pi___kcfi_typeid_/d
52
53# CRC from modversions
54/ __crc_/d
55
56# EXPORT_SYMBOL (symbol name)
57/ __kstrtab_/d
58
59# EXPORT_SYMBOL (namespace)
60/ __kstrtabns_/d
61
62# ---------------------------------------------------------------------------
63# Ignored suffixes
64# (do not forget '$' after each pattern)
65
66# arm
67/_from_arm$/d
68/_from_thumb$/d
69/_veneer$/d
70
71# ---------------------------------------------------------------------------
72# Ignored symbols (exact match)
73# (do not forget a space before and '$' after each pattern)
74
75# for LoongArch?
76/ L0$/d
77
78# ppc
79/ _SDA_BASE_$/d
80/ _SDA2_BASE_$/d
81
82# ---------------------------------------------------------------------------
83# Ignored patterns
84# (symbols that contain the pattern are ignored)
85
86# ppc stub
87/\.long_branch\./d
88/\.plt_branch\./d