Scott Wood <[email protected]> wrote on 2013/06/25 02:51:00: > > On Fri, Jul 20, 2012 at 10:37:17AM +0200, Joakim Tjernlund wrote: > > Zang Roy-R61911 <[email protected]> wrote on 2012/07/20 10:27:52: > > > > > > > > > > > > > -----Original Message----- > > > > From: [email protected] > > > > [ mailto:[email protected]] > > > > On Behalf Of Joakim Tjernlund > > > > Sent: Friday, June 01, 2012 6:36 AM > > > > To: Wood Scott-B07421 > > > > Cc: [email protected]; Dan Malek; Bob Cochran; Support > > > > Subject: Re: [RFC] [PATCH] powerpc: Add MSR_DE to MSR_KERNEL > > > > > > > > It just occurred to me that you guys have this already in your Linux SDK so > > > > it can't be that bad. > > > No. MSR_DE is ONLY added when using CW debug in SDK. > > > Roy > > > > > > > Yes, and I later found that user space debugging is busted if you turn on MSR_DE in > > kernel. > > So, how should we handle the CONFIG_BDI_SWITCH patch? It seems like it > should at least have a warning in the kconfig help text that it breaks > userspace debugging (to the point of causing a kernel oops if it's > tried). Or maybe it can deselect CONFIG_PPC_ADV_DEBUG_REGS? > > It'd also be nice to keep things like this, that are a consequence of how > external debug works on e500, separate from the Abatron-specific stuff. >
I was hoping the kernel would grow per context handling of MSR_DE. Then one could have MSR_DE on in MSR_KERNEL but off in user space(unless gdb request it on a per process basis). Jocke _______________________________________________ Linuxppc-dev mailing list [email protected] https://lists.ozlabs.org/listinfo/linuxppc-dev
