RE: [PATCH 02/11] x86: tboot: avoid Wstringop-overread-warning

[David Laight]

From: Martin Sebor
> Sent: 22 March 2021 22:08
...
> In GCC 11, all access warnings expect objects to be either declared
> or allocated.  Pointers with constant values are taken to point to
> nothing valid (as Arnd mentioned above, this is to detect invalid
> accesses to members of structs at address zero).
> 
> One possible solution to the known address problem is to extend GCC
> attributes address and io that pin an object to a hardwired address
> to all targets (at the moment they're supported on just one or two
> targets).  I'm not sure this can still happen before GCC 11 releases
> sometime in April or May.

A different solution is to define a normal C external data item
and then assign a fixed address with an asm statement or in
the linker script.

	David

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