QEMU 0.13 is completely outdated nowadays - can you still reproduce this
problem with the latest version of QEMU (currently version 2.8) ?
** Changed in: qemu
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/696834
Title:
FP exception reporting not working on NetBSD host
Status in QEMU:
Incomplete
Bug description:
I recognize that NetBSD is not one of the officially supported host
OS. However, qemu 0.13.0 is available in the NetBSD pkgsrc
collection, and works quite well. Well, with one exception (pun
intended): It seems that Floating Point exceptions don't get reported
properly.
The following code-snippet demonstrates the problem:
volatile int flt_signal = 0;
static sigjmp_buf sigfpe_flt_env;
static void
sigfpe_flt_action(int signo, siginfo_t *info, void *ptr)
{
flt_signal++;
}
void trigger(void)
{
struct sigaction sa;
double d = strtod("0", NULL);
if (sigsetjmp(sigfpe_flt_env, 0) == 0) {
sa.sa_flags = SA_SIGINFO;
sa.sa_sigaction = sigfpe_flt_action;
sigemptyset(&sa.sa_mask);
sigaction(SIGFPE, &sa, NULL);
fpsetmask(FP_X_INV|FP_X_DZ|FP_X_OFL|FP_X_UFL|FP_X_IMP);
printf("%g\n", 1 / d);
}
printf("FPE signal handler invoked %d times.\n");
}
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