Ram Pai <linux...@us.ibm.com> writes: > On Fri, Aug 11, 2017 at 08:26:30PM +1000, Michael Ellerman wrote: >> Thiago Jung Bauermann <bauer...@linux.vnet.ibm.com> writes: >> >> > Ram Pai <linux...@us.ibm.com> writes: >> > >> >> The value of the AMR register at the time of exception >> >> is made available in gp_regs[PT_AMR] of the siginfo. ... >> >> I don't understand why we are putting it in there at all? >> >> Is there some special handling of the actual register on signals? I >> haven't seen it. In which case the process can get the value of AMR by >> reading the register. ?? > > The value of AMR register at the time of the key-exception may not be > the same when the signal handler is invoked.
Why not? cheers
