1 #!/bin/sed -f !! 1 #!/bin/sh -x
2 # SPDX-License-Identifier: GPL-2.0-only !! 2 # Based on the vmlinux file create the System.map file
3 # <<
4 # sed script to filter out symbols that are no <<
5 # or not suitable for kallsyms. The input shou <<
6 # <<
7 # System.map is used by module-init tools and 3 # System.map is used by module-init tools and some debugging
8 # tools to retrieve the actual addresses of sy 4 # tools to retrieve the actual addresses of symbols in the kernel.
9 # 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
10 # readprofile starts reading symbols when _ste 38 # readprofile starts reading symbols when _stext is found, and
11 # continue until it finds a symbol which is no 39 # continue until it finds a symbol which is not either of 'T', 't',
12 # 'W' or 'w'. 40 # 'W' or 'w'.
13 # 41 #
14 # -------------------------------------------- !! 42 # Ignored prefixes:
15 # Ignored symbol types !! 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)
16 # 48 #
>> 49 # Ignored symbols:
>> 50 # L0 - for LoongArch?
17 51
18 # a: local absolute symbols !! 52 $NM -n $1 | grep -v \
19 # N: debugging symbols !! 53 -e ' [aNUw] ' \
20 # U: undefined global symbols !! 54 -e ' \$' \
21 # w: local weak symbols !! 55 -e ' \.L' \
22 / [aNUw] /d !! 56 -e ' __crc_' \
23 !! 57 -e ' __kstrtab_' \
24 # -------------------------------------------- !! 58 -e ' __kstrtabns_' \
25 # Ignored prefixes !! 59 -e ' L0$' \
26 # (do not forget a space before each pattern) !! 60 > $2
27 <<
28 # local symbols for ARM, MIPS, etc. <<
29 / \\$/d <<
30 <<
31 # local labels, .LBB, .Ltmpxxx, .L__unnamed_xx <<
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 '$' after <<
74 <<
75 # for LoongArch? <<
76 / L0$/d <<
77 <<
78 # ppc <<
79 / _SDA_BASE_$/d <<
80 / _SDA2_BASE_$/d <<
81 <<
82 # -------------------------------------------- <<
83 # Ignored patterns <<
84 # (symbols that contain the pattern are ignor <<
85 <<
86 # ppc stub <<
87 /\.long_branch\./d <<
88 /\.plt_branch\./d <<
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