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 [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
10 # readprofile starts reading symbols when _ste 14 # readprofile starts reading symbols when _stext is found, and
11 # continue until it finds a symbol which is no 15 # continue until it finds a symbol which is not either of 'T', 't',
12 # 'W' or 'w'. 16 # 'W' or 'w'.
13 # 17 #
>> 18
>> 19 ${NM} -n ${1} | sed >${2} -e "
14 # -------------------------------------------- 20 # ---------------------------------------------------------------------------
15 # Ignored symbol types 21 # Ignored symbol types
16 # 22 #
17 23
18 # a: local absolute symbols 24 # a: local absolute symbols
19 # N: debugging symbols 25 # N: debugging symbols
20 # U: undefined global symbols 26 # U: undefined global symbols
21 # w: local weak symbols 27 # w: local weak symbols
22 / [aNUw] /d 28 / [aNUw] /d
23 29
24 # -------------------------------------------- 30 # ---------------------------------------------------------------------------
25 # Ignored prefixes 31 # Ignored prefixes
26 # (do not forget a space before each pattern) 32 # (do not forget a space before each pattern)
27 33
28 # local symbols for ARM, MIPS, etc. 34 # local symbols for ARM, MIPS, etc.
29 / \\$/d 35 / \\$/d
30 36
31 # local labels, .LBB, .Ltmpxxx, .L__unnamed_xx 37 # local labels, .LBB, .Ltmpxxx, .L__unnamed_xx, .LASANPC, etc.
32 / \.L/d 38 / \.L/d
33 39
34 # arm64 EFI stub namespace 40 # arm64 EFI stub namespace
35 / __efistub_/d 41 / __efistub_/d
36 42
37 # arm64 local symbols in PIE namespace <<
38 / __pi_\\$/d <<
39 / __pi_\.L/d <<
40 <<
41 # arm64 local symbols in non-VHE KVM namespace 43 # arm64 local symbols in non-VHE KVM namespace
42 / __kvm_nvhe_\\$/d 44 / __kvm_nvhe_\\$/d
43 / __kvm_nvhe_\.L/d 45 / __kvm_nvhe_\.L/d
44 46
45 # lld arm/aarch64/mips thunks !! 47 # arm64 lld
46 / __[[:alnum:]]*Thunk_/d !! 48 / __AArch64ADRPThunk_/d
>> 49
>> 50 # arm lld
>> 51 / __ARMV5PILongThunk_/d
>> 52 / __ARMV7PILongThunk_/d
>> 53 / __ThumbV7PILongThunk_/d
>> 54
>> 55 # mips lld
>> 56 / __LA25Thunk_/d
>> 57 / __microLA25Thunk_/d
47 58
48 # CFI type identifiers 59 # CFI type identifiers
49 / __kcfi_typeid_/d 60 / __kcfi_typeid_/d
50 / __kvm_nvhe___kcfi_typeid_/d <<
51 / __pi___kcfi_typeid_/d <<
52 61
53 # CRC from modversions 62 # CRC from modversions
54 / __crc_/d 63 / __crc_/d
55 64
56 # EXPORT_SYMBOL (symbol name) 65 # EXPORT_SYMBOL (symbol name)
57 / __kstrtab_/d 66 / __kstrtab_/d
58 67
59 # EXPORT_SYMBOL (namespace) 68 # EXPORT_SYMBOL (namespace)
60 / __kstrtabns_/d 69 / __kstrtabns_/d
61 70
62 # -------------------------------------------- 71 # ---------------------------------------------------------------------------
63 # Ignored suffixes 72 # Ignored suffixes
64 # (do not forget '$' after each pattern) 73 # (do not forget '$' after each pattern)
65 74
66 # arm 75 # arm
67 /_from_arm$/d 76 /_from_arm$/d
68 /_from_thumb$/d 77 /_from_thumb$/d
69 /_veneer$/d 78 /_veneer$/d
70 79
71 # -------------------------------------------- 80 # ---------------------------------------------------------------------------
72 # Ignored symbols (exact match) 81 # Ignored symbols (exact match)
73 # (do not forget a space before and '$' after 82 # (do not forget a space before and '$' after each pattern)
74 83
75 # for LoongArch? 84 # for LoongArch?
76 / L0$/d 85 / L0$/d
77 86
78 # ppc 87 # ppc
79 / _SDA_BASE_$/d 88 / _SDA_BASE_$/d
80 / _SDA2_BASE_$/d 89 / _SDA2_BASE_$/d
81 90
82 # -------------------------------------------- 91 # ---------------------------------------------------------------------------
83 # Ignored patterns 92 # Ignored patterns
84 # (symbols that contain the pattern are ignor 93 # (symbols that contain the pattern are ignored)
85 94
86 # ppc stub 95 # ppc stub
87 /\.long_branch\./d 96 /\.long_branch\./d
88 /\.plt_branch\./d 97 /\.plt_branch\./d
>> 98
>> 99 # ---------------------------------------------------------------------------
>> 100 # Ignored kallsyms symbols
>> 101 #
>> 102 # If the 3rd parameter exists, symbols from it will be omitted from the output.
>> 103 # This makes kallsyms have the identical symbol lists in the step 1 and 2.
>> 104 # Without this, the step2 would get new symbols generated by scripts/kallsyms.c
>> 105 # when CONFIG_KALLSYMS_ALL is enabled. That might require one more pass.
>> 106 $(if [ $# -ge 3 ]; then ${NM} ${3} | sed -n '/ U /!s:.* \([^ ]*\)$:/ \1$/d:p'; fi)
>> 107 "
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