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Re: Tests requiring MD hooks
On Mon, 11 Jul 2011 19:46:33 +0400, Valeriy E. Ushakov wrote:
But you do cast your mapped address to a function pointer. Does that
do the right thing for architectures with fat function pointers?
Untested; will see this evening what the resulting code does.
You also don't seem to mention instruction/data-cache issues. I
remember if mprotecting something +x makes any guarantees about
(cf. arm_sync_icache(2) for example).
OG does say a thing about this. I assume that mprotect(2) should flush
them (especially icache upon removal of --x right), and count this as a
bug if it does not.
Best way to see is through testing, although I see a couple of
icache_sync in ARM pmap each time execute mappings are modified.
I can't do that simply through rtld, as I need to memcpy(2) the
and therefore have access to the beginning (which is not necessarily
trivial given certain architectures), and the end (never found a way
properly label those without using assembly routines).
You can always parse ELF yourself (unfortunately libelf is still not
imported, it seems).
That's a possibility, yes. Although this would restrict me to ELF, and
rule out all other binary formats.
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