[Bug remote/18772] gdb does not respond to CTRL-C

["dominik.b.czarnota+bugzilla at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18772

Disconnect3d <dominik.b.czarnota+bugzilla at gmail dot com> changed:

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--- Comment #14 from Disconnect3d <dominik.b.czarnota+bugzilla at gmail dot com> ---
(In reply to Pedro Alves from comment #13)
> Once I'm done with my current priorities, my next project will be going back
> to this:
> 
>  [PATCH v2 00/16] Interrupting programs that block/ignore SIGINT
>  https://pi.simark.ca/gdb-patches/20210614212410.1612666-1-pedro@palves.net/
> 
> That redesigns how SIGINT is handled when native debugging, such that GDB
> _always_ gets the SIGINT first instead of relying on the inferior getting
> it, so I suspect it will fix Andrew's testcase when native debugging (though
> I haven't tried it).  As for remote debugging with gdbserver, I will take a
> look at it too, once I resume work on that series.

Hey,

Any progress on it?

I just stumbled on it when debugging an AARCH64 target [0] run via QEMU user
emulation [1]. I wonder if that it is a bug in the QEMU user emulation layer
here or if comes from GDB?

[0]
https://github.com/perfectblue/ctf-writeups/tree/master/2019/insomnihack-teaser-2019/nyanc/challenge
[1] Via command `qemu-aarch64 -g 1234 ./nyanc`, but I first used patchelf to
set interpreter and libc:
```
patchelf --set-interpreter ./ld-linux-aarch64.so.1 ./nyanc 
patchelf --replace-needed libc.so.6 ./libc.so.6 ./nyanc 
```

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