[PATCH] Fix section corruption bug
Thilo Schulz
thilo at tjps.eu
Sat Jun 14 01:23:29 UTC 2014
On Thursday 12 June 2014 14:30:52 Mark Wielaard wrote:
> Thanks. It think that shows the second bug you describe.
First bug. My testcase first uses elf_strptr() to get the strings for the
symbols, and that func internally calls elf_rawdata() thus triggering the first
bug described.
> Still scratching my head a little how to resolve both issues properly.
Hmm.. I didn't do any debugging on the second bug reported, but it seems to me
that once a section was marked dirty, outputting to a new elf causes it to
only consider data explicitly added to the lib internal memory representation
of the elf.
It _did_ write out the data I added via elf_newdata(), and entered the
appropriate offsets into the header file, but completely omitted copying of the
original data.
These issues can all be worked around with by explicitly calling
elf_getdata().
Still, I'm a bit baffled that a bug like this could exist for so long in .. well
I guess these are kind of core developer utils, right?
Or maybe I'm doing some really sick stuff noone else dreamt up yet ;)
--
Best regards,
Thilo Schulz
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