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c17a253870
When System.map was generated, the kernel used mksysmap to filter the kernel symbols, we need to filter "L0" symbols in LoongArch architecture. $ cat System.map | grep L0 9000000000221540 t L0 The L0 symbol exists in System.map, but not in .tmp_System.map. When "cmp -s System.map .tmp_System.map" will show "Inconsistent kallsyms data" error message in link-vmlinux.sh script. Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
1.3 KiB
Executable File
1.3 KiB
Executable File
#!/bin/sh -x
Based on the vmlinux file create the System.map file
System.map is used by module-init tools and some debugging
tools to retrieve the actual addresses of symbols in the kernel.
Usage
mksysmap vmlinux System.map
Generate System.map (actual filename passed as second argument)
$NM produces the following output:
f0081e80 T alloc_vfsmnt
The second row specify the type of the symbol:
A = Absolute
B = Uninitialised data (.bss)
C = Common symbol
D = Initialised data
G = Initialised data for small objects
I = Indirect reference to another symbol
N = Debugging symbol
R = Read only
S = Uninitialised data for small objects
T = Text code symbol
U = Undefined symbol
V = Weak symbol
W = Weak symbol
Corresponding small letters are local symbols
For System.map filter away:
a - local absolute symbols
U - undefined global symbols
N - debugging symbols
w - local weak symbols
readprofile starts reading symbols when _stext is found, and
continue until it finds a symbol which is not either of 'T', 't',
'W' or 'w'. _crc are 'A' and placed in the middle
so we just ignore them to let readprofile continue to work.
(At least sparc64 has _crc in the middle).
$NM -n $1 | grep -v '( [aNUw] )|(_crc)|( $[adt])|( .L)|( L0)' > $2