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> $2
1#!/bin/sh -x
2# Based on the vmlinux file create the System.map file
3# System.map is used by module-init tools and some debugging
4# tools to retrieve the actual addresses of symbols in the kernel.
5#
6# Usage
7# mksysmap vmlinux System.map [exclude]
8
9
10#####
11# Generate System.map (actual filename passed as second argument)
12# The following refers to the symbol type as per nm(1).
13
14# readprofile starts reading symbols when _stext is found, and
15# continue until it finds a symbol which is not either of 'T', 't',
16# 'W' or 'w'.
17#
18
19${NM} -n ${1} | sed >${2} -e "
20# ---------------------------------------------------------------------------
21# Ignored symbol types
22#
23
24# a: local absolute symbols
25# N: debugging symbols
26# U: undefined global symbols
27# w: local weak symbols
28/ [aNUw] /d
29
30# ---------------------------------------------------------------------------
31# Ignored prefixes
32# (do not forget a space before each pattern)
33
34# local symbols for ARM, MIPS, etc.
35/ \\$/d
36
37# local labels, .LBB, .Ltmpxxx, .L__unnamed_xx, .LASANPC, etc.
38/ \.L/d
39
40# arm64 EFI stub namespace
41/ __efistub_/d
42
43# arm64 local symbols in PIE namespace
44/ __pi_\\$/d
45/ __pi_\.L/d
46
47# arm64 local symbols in non-VHE KVM namespace
48/ __kvm_nvhe_\\$/d
49/ __kvm_nvhe_\.L/d
50
51# lld arm/aarch64/mips thunks
52/ __[[:alnum:]]*Thunk_/d
53
54# CFI type identifiers
55/ __kcfi_typeid_/d
56/ __kvm_nvhe___kcfi_typeid_/d
57/ __pi___kcfi_typeid_/d
58
59# CRC from modversions
60/ __crc_/d
61
62# EXPORT_SYMBOL (symbol name)
63/ __kstrtab_/d
64
65# EXPORT_SYMBOL (namespace)
66/ __kstrtabns_/d
67
68# ---------------------------------------------------------------------------
69# Ignored suffixes
70# (do not forget '$' after each pattern)
71
72# arm
73/_from_arm$/d
74/_from_thumb$/d
75/_veneer$/d
76
77# ---------------------------------------------------------------------------
78# Ignored symbols (exact match)
79# (do not forget a space before and '$' after each pattern)
80
81# for LoongArch?
82/ L0$/d
83
84# ppc
85/ _SDA_BASE_$/d
86/ _SDA2_BASE_$/d
87
88# ---------------------------------------------------------------------------
89# Ignored patterns
90# (symbols that contain the pattern are ignored)
91
92# ppc stub
93/\.long_branch\./d
94/\.plt_branch\./d
95
96# ---------------------------------------------------------------------------
97# Ignored kallsyms symbols
98#
99# If the 3rd parameter exists, symbols from it will be omitted from the output.
100# This makes kallsyms have the identical symbol lists in the step 1 and 2.
101# Without this, the step2 would get new symbols generated by scripts/kallsyms.c
102# when CONFIG_KALLSYMS_ALL is enabled. That might require one more pass.
103$(if [ $# -ge 3 ]; then ${NM} ${3} | sed -n '/ U /!s:.* \([^ ]*\)$:/ \1$/d:p'; fi)
104"