On Monday, July 29, 2024, Thiago Macieira wrote:

>
> I was hasty in my reply, because you need to store at least one thing to
> make
> it work: the return address you replaced with yours. You can't keep it r10
> because it's a volatile register. You can't use the stack because you have
> none available. You have to use a thread-local variable and to make that
> reentrant, you'd need to have a linked list of return addresses allocated
> using the heap. So it's possible... just terribly cumbersome.




I don't know where you're going with your linked list. If you look at the
GodBolt I gave you, you'll see I have it working on x86_32 with one simple
thread-local variable.

Ain't no linked lists round these parts.