Does the LD --wrap feature work for library internal references?

[Sebastian Huber]

Hello Nick,

On 10/01/2019 12:13, Nick Clifton wrote:
>> Is this a bug or a feature?
> Well I would have to say "bug", although I think that it is really a case
> of expecting too much of a feature that was really only intended to catch
> ordinary function calls.
>
> I have no idea how to fix it however, so maybe the best that we can is to
> update the documentation....

from the documentation

"Use a wrapper function for symbol. Any undefined reference to symbol 
will be resolved to __wrap_symbol. Any undefined reference to 
__real_symbol will be resolved to symbol. "

it is absolutely not clear that function pointer references are anything 
special and are not covered by this mapping. I am not sure what is 
expected to work. There are not that many tests in the test suite. Maybe 
this:

"Use a wrapper function for all direct calls to symbol. Any direct 
function call to symbol will be resolved to __wrap_symbol. Any direct 
function call to __real_symbol will be resolved to symbol. Indirect 
function calls will not be replaced for example."

Would it be difficult to catch also indirect function calls?

-- 
Sebastian Huber, embedded brains GmbH

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