On 04/09/2015 04:41 AM, Michael Neuling wrote: > On Wed, 2015-04-08 at 19:50 +0200, Ulrich Weigand wrote: >> Anshuman Khandual <khand...@linux.vnet.ibm.com> wrote on 23.03.2015 >> 11:34:30: >> >>>> With that in mind, do we have a way to set the top 32bits of the MSR >>>> (which contain the TM bits) when ptracing 32 bit processes? I can't >>>> find anything like that in this patch set. >>> >>> No, we dont have that yet. When ptracing in 32-bit mode the MSR value >>> which can be viewed or set from the user space through PTRACE_GETREGS >>> PTRACE_SETREGS call is it's lower 32 bits only. Either we can club >>> the upper 32 bits of MSR as part of one of the ELF core notes we are >>> adding in the patch series or we can create one more separate ELF core >>> note for that purpose. Let me know your opinion on this. >> >> I'm not sure I understand this. I thought we had the following: >> >> - If the process calling ptrace is itself 64-bit (which is how GDB is >> built on all current Linux distributions), then PTRACE_GETREGS etc. >> will *always* operate on 64-bit register sets, even if the target >> process is 32-bit. >> >> - If the process calling ptrace is 32-bit, then PTRACE_GETREGS will >> operate on 32-bit register sets. However, there is a separate >> PTRACE_GETREGS64 / PTRACE_SETREGS64 call that will also provide >> the opportunity to operate on the full 64-bit register set. Both >> apply independently of whether the target process is 32-bit or >> 64-bit. >> >> Is this not correct? > > I think you're correct. We should be right. I'd forgotten about the > GET/SETREGS64 interfaces.
In that case, is the patch series complete and okay ? Is there any thing else we need to verify other than waiting for the GDB test results which Edjunior has been working on. But I am not aware of the status on the GDB test development front. Edjunior, Do you have any updates ? Regards Anshuman _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
