Re: 64-bit Addresses in remote protocol

Hi,

On 3/22/21 1:55 PM, Joel Sherrill wrote:
> Hi
> 
> Over at RTEMS, we are looking at some warnings in our debug
> server and wondering if fields described as "addr" in the gdb
> protocol should be treated 64-bits when that target has 64-bit
> addresses like the aarch64.

If the inferior is using 64-bit addresses, then the remote protocol will 
also use 64-bit addresses. If we have a 32-bit inferior running on 
aarch64 hardware, we'll have 32-bit addresses over the remote protocol 
as well.

Even when we're using 64-bit addresses, the remote protocol may not pad 
it with zeroes to make it 64-bit, but it should still be handled as 64-bit.

Does that help?

> 
> Technically, we are looking at sweeping through our gdb server
> and using  uintptr_t for addresses where uint32_t has been
> ok before.
> 
> But I wanted to make sure that our assumption that "addr" means
> a valid target address which means it can be 32- or 64- bits based
> on the target.
> 
> Thanks.
> 
> --joel
> RTEMS
>