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 <a...@linux-foundation.org>
> Signed-off-by: Anshuman Khandual <khand...@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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