On 3/22/19 7:23 PM, asavah wrote: > I'm using qemu-user-arm for crosscompilation needs, usually via a wrapper. > qemu-user-arm (4.0.0-rc0) crashes with SIGILL on at least 2 instructions: > > first case (sadly I don't have more data handy, can reproduce at a later time > if needed): > (gdb) x/i $pc > => 0xfffce314: vseleq.f64 d0, d17, d0 > > second case (llvm-config): > qemu cmdline: > qemu-arm -strace -cpu max -r 5.0.0 -L /home/asavah/kross/build/rpi3/rootfs -E > LD_LIBRARY_PATH=/home/asavah/kross/build/rpi3/rootfs/usr/bin:/home/asavah/kross/build/rpi3/rootfs/usr/lib > /home/asavah/kross/build/rpi3/rootfs/usr/bin/llvm-config --shared-mode
Yes indeed. A recent patch, c0c760afe80, correctly adjusted these insns so that they do properly raise SIGILL when the selected cpu does not support them, but then failed to update -cpu max for the 32-bit guest (qemu-arm) as opposed to the 64-bit guest (qemu-aarch64, which we got for free because cortex-a57, as the base of -cpu max, already sets the correct values). Peter, we need to set SIMDMISC+FPMISC in MVFR2 in arm_max_initfn. r~
