Messages in this thread | | | From | Michael Ellerman <> | Subject | Re: [V6,1/9] elf: Add new powerpc specifc core note sections | Date | Wed, 3 Dec 2014 16:22:04 +1100 (AEDT) |
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On Tue, 2014-02-12 at 07:56:45 UTC, Anshuman Khandual wrote: > This patch adds four new ELF core note sections for powerpc > transactional memory and one new ELF core note section for > powerpc general miscellaneous debug registers. These addition > of new ELF core note sections extends the existing ELF ABI > without affecting it in any manner. > > Acked-by: Andrew Morton <akpm@linux-foundation.org> > Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> > --- > include/uapi/linux/elf.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h > index ea9bf25..2260fc0 100644 > --- a/include/uapi/linux/elf.h > +++ b/include/uapi/linux/elf.h > @@ -379,6 +379,11 @@ typedef struct elf64_shdr { > #define NT_PPC_VMX 0x100 /* PowerPC Altivec/VMX registers */ > #define NT_PPC_SPE 0x101 /* PowerPC SPE/EVR registers */ > #define NT_PPC_VSX 0x102 /* PowerPC VSX registers */ > +#define NT_PPC_TM_SPR 0x103 /* PowerPC TM special registers */ > +#define NT_PPC_TM_CGPR 0x104 /* PowerpC TM checkpointed GPR */ > +#define NT_PPC_TM_CFPR 0x105 /* PowerPC TM checkpointed FPR */ > +#define NT_PPC_TM_CVMX 0x106 /* PowerPC TM checkpointed VMX */ > +#define NT_PPC_MISC 0x107 /* PowerPC miscellaneous registers */
This is a really terrible name, "MISC".
Having said that, I guess it's accurate. We have a whole bunch of regs that have accrued over recent years that aren't accessible via ptrace.
It seems to me if we're adding a misc regset we should be adding everything we might want to it that is currenty architected.
But currently you only include the PPR, TAR & DSCR.
Looking at Power ISA v2.07, I see the following that could be included:
MMCR2 MMCRA PMC1 PMC2 PMC3 PMC4 PMC5 PMC6 MMCR0 EBBHR EBBRR BESCR SIAR SDAR CFAR?
Those are all new in 2.07 except for CFAR.
There might be more I missed, that was just a quick scan.
Some are only accessible when EBB is in use, maybe those could be a separate regset.
cheers
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