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[BartMassey]

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[Kerssss]

Hello,

Today I started reading the book for microbit controller. I was able to do everything but I got stuck at section 5.4. When executing the command 'target remote :1337' I do not get the same reply as described in the book:

• In the book:
  (gdb) target remote :1337 Remote debugging using :1337 0x00000116 in nrf52833_pac::{{impl}}::fmt (self=0xd472e165, f=0x3c195ff7) at /home/nix/.cargo/registry/src/github.com-1ecc6299db9ec823/nrf52833-pac-0.9.0/src/lib.rs:157 157 #[derive(Copy, Clone, Debug)]

• In my PC:
  (gdb) target remote :1337 Remote debugging using :1337 warning: while parsing target description (at line 4): Target description specified unknown architecture "armv7" warning: Could not load XML target description; ignoring 0x00000000 in __vector_table ()

I do not know if this might have something to do but when using breakpoints, I am not able to print the value of x:

(gdb) break 15 Breakpoint 4 at 0x172: file mdbook\src\05-meet-your-software\examples/init.rs, line 15. (gdb) print x No symbol "x" in current context. (gdb) print(x) No symbol "x" in current context. (gdb) print _y No symbol "_y" in current context. (gdb) print &x No symbol "x" in current context.

And the loaded program is:

`
#![deny(unsafe_code)]
#![no_main]
#![no_std]

use cortex_m::asm;
use cortex_m_rt::entry;
use microbit as _;
use panic_halt as _;

#[entry]
fn main() -> ! {
#[allow(clippy::needless_late_init)]
let _y;
let x = 42;
_y = x;

// infinite loop; just so we don't leave this stack frame
loop {
    asm::nop();
}

}
`
Thank you!

[BartMassey]

Looks like your gdb knows nothing of ARM — you probably need gdb-multiarch or similar for your platform. Take a look at issues #27 and #65 which have good descriptions, and file something there if you still have trouble.

We really need to get a PR from somebody updating the Setup and this chapter to make sure everybody knows how they need to be set up on each platform. I don't do Windows or Mac, so I am of little help there I'm afraid.