Re: [PATCH] Linux Kernel Markers

[Andi Kleen]

Ingo Molnar <mingo@xxxxxxx> writes:
> 
> yeah, this would be nice - if it werent it for function pointers, and if 
> all kernel functions were relocatable. But if you can think of a method 
> to do this, it would be nice.

x86-64 did it for some time statically to replace mem copies and some other
functions. Basically it just patches the beginning of the other function
to a jump. However this assumes that the code doesn't contain absolute addresses
(e.g. no switches). In the x86-64 it's easy because only assembly functions
are threated this way. 

-Andi
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