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
