xref: /openbmc/linux/scripts/mksysmap (revision 9b68f30b) 
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 non-VHE KVM namespace
44/ __kvm_nvhe_\$/d
45/ __kvm_nvhe_\.L/d
46
47# arm64 lld
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
58
59# CFI type identifiers
60/ __kcfi_typeid_/d
61
62# CRC from modversions
63/ __crc_/d
64
65# EXPORT_SYMBOL (symbol name)
66/ __kstrtab_/d
67
68# EXPORT_SYMBOL (namespace)
69/ __kstrtabns_/d
70
71# ---------------------------------------------------------------------------
72# Ignored suffixes
73#  (do not forget '$' after each pattern)
74
75# arm
76/_from_arm$/d
77/_from_thumb$/d
78/_veneer$/d
79
80# ---------------------------------------------------------------------------
81# Ignored symbols (exact match)
82#  (do not forget a space before and '$' after each pattern)
83
84# for LoongArch?
85/ L0$/d
86
87# ppc
88/ _SDA_BASE_$/d
89/ _SDA2_BASE_$/d
90
91# ---------------------------------------------------------------------------
92# Ignored patterns
93#  (symbols that contain the pattern are ignored)
94
95# ppc stub
96/\.long_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"
108