Ping Re: [PATCH v1] PowerPC: Add NT_PPC_DMR core file support

[Abhay Kandpal]

Hi all,

Just a gentle ping to see if anyone has had a chance to review this patch,
or if any further changes are needed on my end.

Regards
Abhay Kandpal

On 22/06/26 15:44, Abhay Kandpal wrote:
> Add BFD and readelf support for the new NT_PPC_DMR note type, which
> carries the contents of the Dense Math Registers (DMR) available on
> a future PowerPC processor. The DMR register set consists of eight
> 1024-bit registers introduced by the Dense Math facility in a future
> Power ISA revision.
>
> GDB support for reading and writing DMR registers, both from live
> processes and from core files, will be added as a follow-up patch.
>
> bfd/
> 	* elf-bfd.h (elfcore_write_ppc_dmr): Declare.
> 	* elf.c (NOTE_PSEUDO_SECTION_PPC_DMR): Define.
> 	(elfcore_grok_ppc_dmr): New function.
> 	(elfcore_grok_note) <NT_PPC_DMR>: Handle it.
> 	(elfcore_write_ppc_dmr): New function.
> 	(elfcore_write_register_note): Handle .reg-ppc-dmr.
>
> binutils/
> 	* readelf.c (get_note_type) <NT_PPC_DMR>: Handle it.
>
> include/
> 	* elf/common.h (NT_PPC_DMR): New macro.
> ---
> This patch is reg tested.
>
>   bfd/elf-bfd.h        |  2 ++
>   bfd/elf.c            | 20 ++++++++++++++++++++
>   binutils/readelf.c   |  2 ++
>   include/elf/common.h |  2 ++
>   4 files changed, 26 insertions(+)
>
> diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h
> index 88d35925987..0605d31107f 100644
> --- a/bfd/elf-bfd.h
> +++ b/bfd/elf-bfd.h
> @@ -3100,6 +3100,8 @@ extern char *elfcore_write_ppc_tm_cppr
>     (bfd *, char *, int *, const void *, int);
>   extern char *elfcore_write_ppc_tm_cdscr
>     (bfd *, char *, int *, const void *, int);
> +extern char *elfcore_write_ppc_dmr
> +  (bfd *, char *, int *, const void *, int);
>   extern char *elfcore_write_s390_timer
>     (bfd *, char *, int *, const void *, int);
>   extern char *elfcore_write_s390_todcmp
> diff --git a/bfd/elf.c b/bfd/elf.c
> index c9a68404e9d..d0769d03644 100644
> --- a/bfd/elf.c
> +++ b/bfd/elf.c
> @@ -80,6 +80,7 @@ SECTION
>   #define NOTE_PSEUDO_SECTION_LOONGARCH_LASX	".reg-loongarch-lasx"
>   #define NOTE_PSEUDO_SECTION_LOONGARCH_LBT	".reg-loongarch-lbt"
>   #define NOTE_PSEUDO_SECTION_LOONGARCH_LSX	".reg-loongarch-lsx"
> +#define NOTE_PSEUDO_SECTION_PPC_DMR		".reg-ppc-dmr"
>   #define NOTE_PSEUDO_SECTION_PPC_DSCR		".reg-ppc-dscr"
>   #define NOTE_PSEUDO_SECTION_PPC_EBB		".reg-ppc-ebb"
>   #define NOTE_PSEUDO_SECTION_PPC_PMU		".reg-ppc-pmu" @@ -10507,6 +10508,12 @@ elfcore_grok_ppc_vsx (bfd *abfd, 
> Elf_Internal_Note *note) return elfcore_make_note_pseudosection (abfd, 
> NOTE_PSEUDO_SECTION_PPC_VSX, note); } +static bool 
> +elfcore_grok_ppc_dmr (bfd *abfd, Elf_Internal_Note *note) +{ + return 
> elfcore_make_note_pseudosection (abfd, NOTE_PSEUDO_SECTION_PPC_DMR, 
> note); +} + static bool elfcore_grok_ppc_tar (bfd *abfd, 
> Elf_Internal_Note *note) { @@ -11193,6 +11200,7 @@ elfcore_grok_note 
> (bfd *abfd, Elf_Internal_Note *note) case NT_LARCH_LASX: return 
> elfcore_grok_loongarch_lasx (abfd, note); case NT_LARCH_LBT: return 
> elfcore_grok_loongarch_lbt (abfd, note); case NT_LARCH_LSX: return 
> elfcore_grok_loongarch_lsx (abfd, note); + case NT_PPC_DMR: return 
> elfcore_grok_ppc_dmr (abfd, note); case NT_PPC_DSCR: return 
> elfcore_grok_ppc_dscr (abfd, note); case NT_PPC_EBB: return 
> elfcore_grok_ppc_ebb (abfd, note); case NT_PPC_PMU: return 
> elfcore_grok_ppc_pmu (abfd, note); @@ -12459,6 +12467,17 @@ 
> elfcore_write_ppc_vsx (bfd *abfd, NOTE_NAME_LINUX, NT_PPC_VSX, 
> ppc_vsx, size); } +char * +elfcore_write_ppc_dmr (bfd *abfd, + char 
> *buf, + int *bufsiz, + const void *ppc_dmr, + int size) +{ + return 
> elfcore_write_note (abfd, buf, bufsiz, + NOTE_NAME_LINUX, NT_PPC_DMR, 
> ppc_dmr, size); +} + char * elfcore_write_ppc_tar (bfd *abfd, char 
> *buf, @@ -13040,6 +13059,7 @@ elfcore_write_register_note (bfd *abfd, 
> { NOTE_PSEUDO_SECTION_LOONGARCH_LASX, elfcore_write_loongarch_lasx}, { 
> NOTE_PSEUDO_SECTION_LOONGARCH_LBT, elfcore_write_loongarch_lbt}, { 
> NOTE_PSEUDO_SECTION_LOONGARCH_LSX, elfcore_write_loongarch_lsx}, + { 
> NOTE_PSEUDO_SECTION_PPC_DMR, elfcore_write_ppc_dmr}, { 
> NOTE_PSEUDO_SECTION_PPC_DSCR, elfcore_write_ppc_dscr}, { 
> NOTE_PSEUDO_SECTION_PPC_EBB, elfcore_write_ppc_ebb}, { 
> NOTE_PSEUDO_SECTION_PPC_PMU, elfcore_write_ppc_pmu}, diff --git 
> a/binutils/readelf.c b/binutils/readelf.c index 
> bf27f9eec23..aed0b058732 100644 --- a/binutils/readelf.c +++ 
> b/binutils/readelf.c @@ -21847,6 +21847,8 @@ get_note_type (Filedata * 
> filedata, unsigned e_type) return _("NT_PPC_TM_CPPR (ppc checkpointed PPR register)");
>         case NT_PPC_TM_CDSCR:
>   	return _("NT_PPC_TM_CDSCR (ppc checkpointed DSCR register)");
> +      case NT_PPC_DMR:
> +	return _("NT_PPC_DMR (ppc Dense Math registers)");
>         case NT_386_TLS:
>   	return _("NT_386_TLS (x86 TLS information)");
>         case NT_386_IOPERM:
> diff --git a/include/elf/common.h b/include/elf/common.h
> index 1ae68221a89..bd327194b7e 100644
> --- a/include/elf/common.h
> +++ b/include/elf/common.h
> @@ -686,6 +686,8 @@
>   					/*   note name must be "LINUX".  */
>   #define NT_PPC_TM_CDSCR	0x10f		/* PowerPC TM checkpointed Data SCR */
>   					/*   note name must be "LINUX".  */
> +#define NT_PPC_DMR	0x113		/* PowerPC Dense Math Registers */
> +					/*   note name must be "LINUX".  */
>   #define NT_386_TLS	0x200		/* x86 TLS information */
>   					/*   note name must be "LINUX".  */
>   #define NT_386_IOPERM	0x201		/* x86 io permissions */
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://sourceware.org/pipermail/binutils/attachments/20260713/f3d0a71b/attachment-0001.htm>