On 08/30/2016 02:22 PM, Jens Bauer wrote:
Hi all.
I know it's possible to declare a variable 'read-only' by using 'const'.
When working with microcontrollers (small ICs, which often requires you to
write your code at driver-level), you need to be able to declare a structure
member 'read-only', 'write-only' or 'read+write'.
In addition to that, it would definitely be handy to declare variables 'no
access'
So I'd like to propose the following two attributes, which is 'off' by default
(eg. read access + write access):
__attribute__((not_readable))
__attribute__((not_writable))
Any combination of those allowed.
You can already do this:
“
int my_register;
#define store_my_register(val) (my_register = (val))
#pragma GCC poison my_register
”
And GCC will reject any access to my_register.
Is this solution good enough?
Florian
