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When System.map was generated, the kernel used mksysmap to
filter the kernel symbols, but all the symbols with the
second letter 'L' in the kernel were filtered out, not just
the symbols starting with 'dot + L'.
For example:
ashimida@ubuntu:~/linux$ cat System.map |grep ' .L'
ashimida@ubuntu:~/linux$ nm -n vmlinux |grep ' .L'
ffff0000088028e0 t bLength_show
......
ffff0000092e0408 b PLLP_OUTC_lock
ffff0000092e0410 b PLLP_OUTA_lock
The original intent should be to filter out all local symbols
starting with '.L', so the dot should be escaped.
Fixes: 00902e9847 ("mksysmap: Add h8300 local symbol pattern")
Signed-off-by: ashimida <ashimida@linux.alibaba.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
45 lines
1.3 KiB
Bash
Executable File
45 lines
1.3 KiB
Bash
Executable File
#!/bin/sh -x
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# Based on the vmlinux file create the System.map file
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# System.map is used by module-init tools and some debugging
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# tools to retrieve the actual addresses of symbols in the kernel.
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#
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# Usage
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# mksysmap vmlinux System.map
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#####
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# Generate System.map (actual filename passed as second argument)
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# $NM produces the following output:
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# f0081e80 T alloc_vfsmnt
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# The second row specify the type of the symbol:
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# A = Absolute
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# B = Uninitialised data (.bss)
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# C = Common symbol
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# D = Initialised data
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# G = Initialised data for small objects
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# I = Indirect reference to another symbol
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# N = Debugging symbol
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# R = Read only
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# S = Uninitialised data for small objects
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# T = Text code symbol
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# U = Undefined symbol
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# V = Weak symbol
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# W = Weak symbol
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# Corresponding small letters are local symbols
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# For System.map filter away:
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# a - local absolute symbols
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# U - undefined global symbols
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# N - debugging symbols
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# w - local weak symbols
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# readprofile starts reading symbols when _stext is found, and
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# continue until it finds a symbol which is not either of 'T', 't',
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# 'W' or 'w'. __crc_ are 'A' and placed in the middle
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# so we just ignore them to let readprofile continue to work.
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# (At least sparc64 has __crc_ in the middle).
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$NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)\|\( \.L\)' > $2
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