On 5 March 2018 at 18:54, Christian Borntraeger <borntrae...@de.ibm.com> wrote: > > > On 03/05/2018 07:45 PM, Farhan Ali wrote: >> 0x000003ff90752026 <+110>: svc 175 > > sys_rt_sigprocmask. r0 should not be changed by the system call. > >> 0x000003ff90752028 <+112>: lgr %r5,%r0 >> => 0x000003ff9075202c <+116>: lfpc 248(%r5) > > so r5 is zero and it was loaded from r0. r0 was loaded from r3 (which is the > 2nd parameter to this > function). Now this is odd.
...particularly given that the only place we call swapcontext() the second parameter is always the address of a local variable and can't be 0... thanks -- PMM
