Messages in this thread | | | Date | Fri, 26 Apr 2013 09:06:10 +0800 | From | Chen Gang <> | Subject | Re: [PATCH v2] PowerPC: kernel: compiling issue, make additional room in exception vector area |
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On 2013年04月26日 07:16, Michael Neuling wrote: >> > diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S >> > index e789ee7..8997de2 100644 >> > --- a/arch/powerpc/kernel/exceptions-64s.S >> > +++ b/arch/powerpc/kernel/exceptions-64s.S >> > @@ -254,7 +254,11 @@ hardware_interrupt_hv: >> > STD_EXCEPTION_PSERIES(0x800, 0x800, fp_unavailable) >> > KVM_HANDLER_PR(PACA_EXGEN, EXC_STD, 0x800) >> > >> > - MASKABLE_EXCEPTION_PSERIES(0x900, 0x900, decrementer) >> > + . = 0x900 >> > + .globl decrementer_pSeries >> > +decrementer_pSeries: >> > + b decrementer_pSeries_0 >> > + > Unfortunately you can't do this ether as we need to save the CFAR[1] > before it's overwritten by any branch. MASKABLE_EXCEPTION_PSERIES does > this. >
Thanks for your checking.
> CFAR is the Come From Register. It saves the location of the last > branch and is hence overwritten by any branch. >
Do we process it just like others done (e.g. 0x300, 0xe00, 0xe20 ...) ? . = 0x900 .globl decrementer_pSeries decrementer_pSeries: HMT_MEDIUM_PPR_DISCARD SET_SCRATCH0(r13) b decrementer_pSeries_0
...
> Thanks for trying. >
Not at all, before get fixed by other members, I should continue trying.
-- Chen Gang
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