On Mon, 2021-06-21 at 10:14 -0400, Jonathan Albrecht wrote: > Currently when a compare-and-trap instruction is executed, qemu will > always raise a SIGILL signal. On real hardware, a SIGFPE is raised. > > Change the PGM_DATA case in cpu_loop to follow the behavior in > linux kernel /arch/s390/kernel/traps.c. > * Only raise SIGILL if DXC == 0 > * If DXC matches an IEEE exception, raise SIGFPE with correct si_code > * Raise SIGFPE with si_code == 0 for everything else > > When applied on [email protected], this fixes > crashes in the java jdk such as the linked bug. > > Buglink: https://bugs.launchpad.net/qemu/+bug/1920913 > Resolves: https://gitlab.com/qemu-project/qemu/-/issues/319 > Signed-off-by: Jonathan Albrecht < > [email protected]> > --- > linux-user/s390x/cpu_loop.c | 19 ++++++++++--------- > 1 file changed, 10 insertions(+), 9 deletions(-)
I tried this on top of my SIGILL patch to run Maven, it worked without issues. Acked-by: Ilya Leoshkevich <[email protected]> Tested-by: Ilya Leoshkevich <[email protected]>
