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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1.3 KiB
1.3 KiB
#!/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 retreive 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 = Comon 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
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 '( [aUw] )|(_crc)|( $[adt])' > $2