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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/113312] Update __attribute__((interrupt)) for Intel FRED
Date: Thu, 11 Jan 2024 04:09:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113312

--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H. Peter Anvin from comment #6)
> Of course. That's not what we want in the Linux kernel specifically, thou=
gh.
> It's really up to the OS.

no_callee_saved_registers attribute is sufficient.  One can do

void *
__attribute__((no_caller_saved_registers))
fred_handler (struct fred_event_info_and_called_saved_regs *arg)
{
  ....
}=