[Crash-utility] [PATCH 0/6] gcore: a bug fix and improvements on register restoration for active tasks

Hello Dave, This patch series for gcore extension module fix a bug and improves register restoration for active tasks. Could you review these? I'm going to release these after your review. In summary, - The first patch fixes a bug that a target task context is wrongly specified in the process of getting NT_PRSTATUS on vmcore in ELF. Without this patch, all the register values but the one of the task user mannually specifies are unintensionally equal each other. - The remainig patches implements register restorement for active tasks from exception frame and KVMDUMP notes. By this, register values for active tasks can be correctly restored for KDUMP, NETDUMP, DISKDUMP and KVMDUMP formats. Thanks. HATAYAMA Daisuke