With spectre I get better results with the original test on core2 with rdtscp changed to rdtsc. Run a couple of cpu intensive processes and the original over many runs starts recovering the message. With the new version all I get are either ? or gibberish.
Which CPU exactly?

The same cpu I ...

Aiken wrote:With spectre I get better results with the original test on core2 with rdtscp changed to rdtsc. Run a couple of cpu intensive processes and the original over many runs starts recovering the message. With the new version all I get are either ? or gibberish.

Which CPU exactly?

Anyhow, he also said that my cpu (Intel(R) Pentium(R) Dual CPU E2180) isn't in the affected list, which is interesting.
https://security-center.intel.com/advisory.aspx?intelid=INTEL-SA-00088&languageid=en-fr
Well, it seems that Penryn Core 2 processors aren't in the list too.
I've tried to change ...

Is there a PoC that works on older processors?
Both https://github.com/Eugnis/spectre-attack/ and https://github.com/gkaindl/meltdown-poc (only for OSX ?) are not working on my core2.

I asked the author and he promptly responded with the version that now works in my case.
What confuses me is that ...

I have some interesting results for my Gentoo Xen HVM

I updated my system to 4.14.11-gentoo-r2 and the PoC code produces this

So, Xen hardware virtual machines need more than a local kernel fix, they need the actual Hypervisor code patched as well? Interesting......
The patch is for Meltdown ...

Is it possible to provide a patch for the current stable gentoo-sources? Manually patching it on 4.9.72 gives me an hunk fail.

I'll report the bug to the musl mailing list.

The workaround suggested by Ant P. works fine. Sorry for the late reply.

Hello,
when I try to compile qemu I run in the following error:
gcc -I/var/tmp/portage/app-emulation/qemu-2.9.0-r2/work/qemu-2.9.0/user-build/linux-user -Ilinux-user -I/var/tmp/portage/app-emulation/qemu-2.9.0-r2/work/qemu-2.9.0/tcg -I/var/tmp/portage/app-emulation/qemu-2.9.0-r2/work/qemu-2.9.0/tcg ...

Hello,
I tried to install klibc but it fails on the compile phase with the following error:
>>> Compiling source in /var/tmp/portage/dev-libs/klibc-2.0.4-r2/work/klibc-2.0.4 ...
make -j3 defconfig CC=x86_64-pc-linux-gnu-gcc HOSTCC=x86_64-pc-linux-gnu-gcc ARCH=x86
HOSTCC scripts/basic/fixdep ...