From: Brad Smith <brad@comstyle.com>
To: "Thomas Huth" <thuth@redhat.com>,
qemu-devel@nongnu.org, "Paolo Bonzini" <pbonzini@redhat.com>,
"Daniel P. Berrangé" <berrange@redhat.com>
Cc: "Philippe Mathieu-Daudé" <philmd@linaro.org>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>
Subject: Re: [PATCH for-9.0] meson.build: Disable -fzero-call-used-regs on OpenBSD
Date: Thu, 11 Apr 2024 16:28:10 -0400 [thread overview]
Message-ID: <1ff86ac9-917c-4703-85c6-c1e5bf3be79d@comstyle.com> (raw)
In-Reply-To: <1ccea33f-23cd-4beb-b6d4-8bdc9c623dd9@redhat.com>
On 4/11/2024 8:12 AM, Thomas Huth wrote:
> On 11/04/2024 14.08, Thomas Huth wrote:
>> QEMU currently does not work on OpenBSD since the -fzero-call-used-regs
>
> That should be "OpenBSD 7.5" ... older versions are fine since they
> are using an older version of Clang that does not have
> -fzero-call-used-regs yet, I think.
About the compiler version that is correct. Between 7.4 and 7.5 we
upgraded from Clang 13 to 16.
-fzero-call-used-regs was added with the 15 release.
https://github.com/llvm/llvm-project/commit/deaf22bc0e306bc44c70d2503e9364b5ed312c49
Retguard is also used to mitigate ROP exploits and is enabled by default.
https://www.openbsd.org/papers/asiabsdcon2019-rop-paper.pdf
next prev parent reply other threads:[~2024-04-11 20:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-11 12:08 [PATCH for-9.0] meson.build: Disable -fzero-call-used-regs on OpenBSD Thomas Huth
2024-04-11 12:12 ` Thomas Huth
2024-04-11 20:28 ` Brad Smith [this message]
2024-04-11 14:56 ` Philippe Mathieu-Daudé
2024-04-12 10:02 ` Paolo Bonzini
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