Re: Tests requiring MD hooks

[Matt Thomas <matt%3am-software.com@localhost>]

On Jul 10, 2011, at 7:58 PM, Valeriy E. Ushakov wrote:

> 
>> That seems to be a bit tricky to write in a portable way: testing --x
>> right in memory pages requires to put/copy some payload in a page and
>> call it.
> 
> dlopen something, find a function with dlsym, disable exec on that
> page and call the function.  Catch SIGSEGV, check siginfo.  mprotect
> it back and call the function again.

doesn't work when the target uses function descriptors.