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[PATCH 0/4] x86_64-gnu signal fixes

From: Sergey Bugaev
Subject: [PATCH 0/4] x86_64-gnu signal fixes
Date: Mon, 15 May 2023 11:33:19 +0300


now that we got enough of the system running on x86_64-gnu, we can
actually test the signal machinery. In fact we sort of *have to*,
because /bin/sh receives SIGCHLD when a command completes, and wants
to handle it.

Suprisingly, most of the logic actually does just work! -- but several
things were broken; and this patch series contains the fixes. With
these patches (+ the thread setup fixes that I'll send as a separate
series) I'm able to receive a signal, do all the trampoline and
intr-rpc magic, run the handler, and sigreturn back into user code --
apparently successfully.


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