shiva7 wrote > Thanks again Scott. / >> Any idea whether the DBCR0 BRT bit actually works(??), > >> Do you have reason to believe that it might not? / > > I'm facing a strange problem which was not there on server processor. Let > me try to give brief flow. > > Server : > > Set BE bit (thru system call or sigreturn) for specific thread -> for > every branch -> trace exception -> Normal exception prolog > (STD_EXCEPTION_COMMON) SRR0 and SRR1 > > Embedded/BOOKE: > > Set DE & BRT bit (thru system call or sigreturn) for specific thread -> > for every branch taken -> Debug exception -> DEBUG_DEBUG prolog -> > return_dbg_except DSRR0 & DSRR1 > > In server case, able to capture the branches as expected, but wherein > BOOKE though branch taken exception are generated, at the certain stage > (mostly after turn on BRT & DE bit) user process is deviated (not taking > the same flow as like server) and leading to different > corruption/unexpected behavior. / >> And also, anything special required for "server" family application code >> porting here ?? as because in server family the trace exception used to >> viz >> NORMAL exception proglog and uses SRR0 and SRR1 but in this ISA/embedded >> case have dedicated DEBUG_DEBUG prolog and dedicated registers DSRR0 and >> DSRR1. > >> IIRC the branch taken mechanism does have different semantics than the >> equivalent mechanism on server. You can find discussion of this in the >> archives. :-) / > > Most of the discussions so far I have surfed are related to branch > taken/fall through(not taken) semantics related. But, in general, if I > have an application running on server where tracing was based on BE bit > and same can run on e500mc with DE & BRT combination? > > > Thanks In Advance.
Could someone help on this regard? -- View this message in context: http://linuxppc.10917.n7.nabble.com/questions-on-CONFIG-PPC-ADV-DEBUG-REGS-DBCR0-BRT-and-DBCR0-ACTIVE-EVENTS-tp70147p82686.html Sent from the linuxppc-dev mailing list archive at Nabble.com. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
