Re: [PATCH v3 0/2] target/s390x: Fix SIGILL psw.addr reporting

[Ilya Leoshkevich <iii@linux.ibm.com>]

On Thu, 2021-06-10 at 11:49 +0200, David Hildenbrand wrote:
> On 02.06.21 02:22, Ilya Leoshkevich wrote:
> > qemu-s390x puts a wrong value into SIGILL's siginfo_t's psw.addr:
> > it
> > should be a pointer to the instruction following the illegal
> > instruction, but at the moment it is a pointer to the illegal
> > instruction itself. This breaks OpenJDK, which relies on this
> > value.
> > 
> > Patch 1 fixes the issue, patch 2 adds a test.
> > 
> > v1:
> > https://lists.nongnu.org/archive/html/qemu-devel/2021-05/msg06592.html
> > v1 -> v2: Use a better buglink (Cornelia), simplify the inline asm
> >            magic in the test and add an explanation (David).
> > 
> > v2:
> > https://lists.nongnu.org/archive/html/qemu-devel/2021-05/msg06649.html
> > v2 -> v3: Fix SIGSEGV handling (found when trying to run valgrind
> > under
> >            qemu-user).
> > 
> 
> There might still be something wrong:
> 
> https://gitlab.com/qemu-project/qemu/-/issues/319
> 
> At least it smells like some more signal (mis)handling.
> 
> 

I've taken another look, and it must be compare-and-trap SIGFPE/SIGILL
mixup. I think I will just fix it here in v4.

Best regards,
Ilya