arm/aarch64 gdb connection visual disassembled view, hiding extra registers.

[Goyo2600]

Description

Using r2 to connect to gdb remotely to qemu-aarch64 -g 5555 ... or qemu-arm -g 5555 ...

r2 -a arm -b 64 -D gdb -d gdb http://localhost:5555

We get a lot of registers in visual mode: (red circle).

The disassembled view with those registers is too small, and I don't need to view those registers in visual mode for my projects.
In #radare2 chat, it was suggested the solution must be fixed in the gdb reg profile converter.

a rapid and simple patch for getting the same effect is in libr/reg/profile.c in parse_def function:

This is not a solution, is a simple patch to hide those registers and get the dissasembled view in Visual mode with the desired effect:

[trufae]

Uppercase registers should be ignored because those are not valid names for r2. But we can handle them as separate group in 5.9 because thats an abi breaking change

[trufae]

this fix should work for you and not break anything, for 5.9 i can introduce those new reg types and get this right, so we hav etime to check for other archs if thats the case or improve the parser.
thanks!