graphic: 0.155 semantic: 0.151 device: 0.105 files: 0.089 other: 0.087 PID: 0.080 boot: 0.072 permissions: 0.057 socket: 0.048 network: 0.039 vnc: 0.039 debug: 0.039 performance: 0.031 KVM: 0.007 debug: 0.454 files: 0.106 other: 0.094 performance: 0.077 PID: 0.064 device: 0.040 network: 0.036 graphic: 0.028 semantic: 0.027 socket: 0.020 boot: 0.019 permissions: 0.015 vnc: 0.010 KVM: 0.008 s390x binaries segfault Hello World appears to segfault with qemu s390x, on a Debian 10.0.0 Buster amd64 host. $ cat hello.cpp #include using std::cout; int main() { cout << "Hello World!\n"; return 0; } $ s390x-linux-gnu-g++ -o hello hello.cpp $ qemu-s390x-static hello Segmentation fault Does "make check-tcg" work in this case? It works for me here. Which QEMU version are you using here? Can you reproduce this issue with the latest upstream QEMU ? ... otherwise, please report this issue to the Debian bug tracker instead. [Expired for QEMU because there has been no activity for 60 days.]