This seems like an OS bug (kernel or Cocoa). The usage of the signal is common to all QEMU system emulation targets, so it's not dependent on Stellaris.
Try an older version of OS X, or try a different video backend (e.g. VNC). That may help isolating the problem. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1065325 Title: qemu-system-arm hangs on SIGUSR1 on OS X 10.8.2 Status in QEMU: New Bug description: I built the latest version of QEMU commit b4ae3cfa57b8c1bdbbd7b7d420971e9171203ade Date: Mon Oct 1 12:34:37 2012 +1000 My system is: Darwin localhost 12.2.0 Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64 localhost:qemu oliverks$ gcc -v Using built-in specs. Target: i686-apple-darwin11 Configured with: /private/var/tmp/llvmgcc42/llvmgcc42-2336.11~28/src/configure --disable-checking --enable-werror --prefix=/Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2 --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-prefix=llvm- --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin11 --enable-llvm=/private/var/tmp/llvmgcc42/llvmgcc42-2336.11~28/dst-llvmCore/Developer/usr/local --program-prefix=i686-apple-darwin11- --host=x86_64-apple-darwin11 --target=i686-apple-darwin11 --with-gxx-include-dir=/usr/include/c++/4.2.1 Thread model: posix gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) Shortly after start up I freeze. I am running the command line ./arm-softmmu/qemu-system-arm -M lm3s811evb -kernel ../FreeRTOSV7.2.0/FreeRTOS/Demo/CORTEX_LM3S811_GCC/gcc/RTOSDemo.axf The hang appears to occur due to this signal being sent static void qemu_tcg_init_cpu_signals(void) { sigset_t set; struct sigaction sigact; memset(&sigact, 0, sizeof(sigact)); sigact.sa_handler = cpu_signal; sigaction(SIG_IPI, &sigact, NULL); // <-- Signal that hangs system sigemptyset(&set); sigaddset(&set, SIG_IPI); pthread_sigmask(SIG_UNBLOCK, &set, NULL); } Oliver To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1065325/+subscriptions
