On Mon, Sep 10, 2018 at 08:40:08PM +0200, Moritz Mühlenhoff wrote: > On Mon, Sep 10, 2018 at 02:54:54AM +0200, b...@debian.16bits.net wrote: > > /proc/cpuinfo shows it supports sse, but not sse2. And movsd is a sse2 > > instruction [1] > > This is an intentional upstream change which also affects the binaries > provided by Mozilla: > https://support.mozilla.org/en-US/kb/your-hardware-no-longer-supported > > It might be possible to disable the use of SSE2 for the i386 architecture > (as every CPU covered by amd64 supports SSE2), but I have no idea how > intrusive that would be (and might cause some problems in the long term > if the non-SSE2 code paths are not covered by upstream CI/tests). It's > also one additional patch to be carried forward until i386 is retired > as an architecture.
The problem from bug #877445 is actually trivial to fix, but the ones from bug 908449/908396 would seem unrelated. I tried running firefox-esr from stretch-security in qemu without sse2 (without kvm), and it... just worked. I couldn't even reproduce #877445. The problem is that apparently, even when doing emulation, qemu doesn't actually disable instruction sets, it just hides them from cpuid. Mike
