On 29/01/2026 17:14, Mike Kelly wrote:
Here is a patch for review to address the xmm register value corruption
occurring in user code that is heavily bombarded by signals.
It's a small patch to address what I found to be a very difficult problem. The
xstate_size of the interrupted thread's xstate is not saved in any structure. I
therefore had to implement the assumption that xstate_size returns the same
value for all calls to __i386_get_xstate_size() which is indeed currently the
case. There is no actual issue here but it seemed wrong to me to do so.
Comments welcome.
Also note that this patch has been tested successfully on hurd-i386 and
hurd-amd64 using the test case 'sigtest_xmm0.c' attached to message
https://lists.gnu.org/archive/html/bug-hurd/2026-01/msg00241.html
Mike.
