Re: [PATCH v5 16/24] powerpc/elf: Add 32-bit REL16 relocation definitions

From: R Nageswara Sastry <rnsastry@linux.ibm.com>
To: "Thomas Weißschuh" <thomas.weissschuh@linutronix.de>,
	"Paul Walmsley" <paul.walmsley@sifive.com>,
	"Palmer Dabbelt" <palmer@dabbelt.com>,
	"Albert Ou" <aou@eecs.berkeley.edu>,
	"Alexandre Ghiti" <alex@ghiti.fr>,
	"Nathan Chancellor" <nathan@kernel.org>,
	"Nick Desaulniers" <nick.desaulniers+lkml@gmail.com>,
	"Bill Wendling" <morbo@google.com>,
	"Justin Stitt" <justinstitt@google.com>,
	"Andy Lutomirski" <luto@kernel.org>,
	"Vincenzo Frascino" <vincenzo.frascino@arm.com>,
	"Kees Cook" <kees@kernel.org>, "Ingo Molnar" <mingo@redhat.com>,
	"Borislav Petkov" <bp@alien8.de>,
	"Dave Hansen" <dave.hansen@linux.intel.com>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	"Richard Weinberger" <richard@nod.at>,
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	"Catalin Marinas" <catalin.marinas@arm.com>,
	"Will Deacon" <will@kernel.org>,
	"Madhavan Srinivasan" <maddy@linux.ibm.com>,
	"Michael Ellerman" <mpe@ellerman.id.au>,
	"Nicholas Piggin" <npiggin@gmail.com>,
	"Huacai Chen" <chenhuacai@kernel.org>,
	"WANG Xuerui" <kernel@xen0n.name>,
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	"Alexander Gordeev" <agordeev@linux.ibm.com>,
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	"Sven Schnelle" <svens@linux.ibm.com>,
	"Thomas Bogendoerfer" <tsbogend@alpha.franken.de>,
	"Miguel Ojeda" <ojeda@kernel.org>,
	"Alex Gaynor" <alex.gaynor@gmail.com>,
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	"Boqun Feng" <boqun@kernel.org>,
	"Nicolas Schier" <nsc@kernel.org>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
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	Jan Stancek <jstancek@redhat.com>,
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	Alexandre Ghiti <alexghiti@rivosinc.com>
Subject: Re: [PATCH v5 16/24] powerpc/elf: Add 32-bit REL16 relocation definitions
Date: Tue, 8 Sep 2026 19:31:57 +0530	[thread overview]
Message-ID: <ea5fe025-4d7c-4d57-b277-85a922f09f84@linux.ibm.com> (raw)
In-Reply-To: <20260908-vdso-absolute-reloc-v5-16-3a93791af1cf@linutronix.de>


On 08.09.2026 12:03 PM, Thomas Weißschuh wrote:
> These are used by userspace and are necessary for the vdsocheck tool.
> They share the numbers with their 64-bit variants.
>
> Also update the copy in tools/ so they can be used by vdsocheck.
>
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Tested-by: R Nageswara Sastry <rnsastry@linux.ibm.com>

System: ppc64le LPAR (IBM POWER), Linux 7.3-rc2
> ---
>   include/uapi/linux/elf-r.h       | 7 ++++++-
>   tools/include/uapi/linux/elf-r.h | 7 ++++++-
>   2 files changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
> index 72fc9045a5d4..170888422400 100644
> --- a/include/uapi/linux/elf-r.h
> +++ b/include/uapi/linux/elf-r.h
> @@ -182,8 +182,13 @@
>   #define R_PPC_GOT_DTPREL16_HI	93 /* half16*	(sym+add)@got@dtprel@h */
>   #define R_PPC_GOT_DTPREL16_HA	94 /* half16*	(sym+add)@got@dtprel@ha */
>   
> +#define R_PPC_REL16		249
> +#define R_PPC_REL16_LO		250
> +#define R_PPC_REL16_HI		251
> +#define R_PPC_REL16_HA		252
> +
>   /* keep this the last entry. */
> -#define R_PPC_NUM		95
> +#define R_PPC_NUM		253
>   
>   /* PowerPC64 relocations defined by the ABIs */
>   #define R_PPC64_NONE    R_PPC_NONE
> diff --git a/tools/include/uapi/linux/elf-r.h b/tools/include/uapi/linux/elf-r.h
> index 72fc9045a5d4..170888422400 100644
> --- a/tools/include/uapi/linux/elf-r.h
> +++ b/tools/include/uapi/linux/elf-r.h
> @@ -182,8 +182,13 @@
>   #define R_PPC_GOT_DTPREL16_HI	93 /* half16*	(sym+add)@got@dtprel@h */
>   #define R_PPC_GOT_DTPREL16_HA	94 /* half16*	(sym+add)@got@dtprel@ha */
>   
> +#define R_PPC_REL16		249
> +#define R_PPC_REL16_LO		250
> +#define R_PPC_REL16_HI		251
> +#define R_PPC_REL16_HA		252
> +
>   /* keep this the last entry. */
> -#define R_PPC_NUM		95
> +#define R_PPC_NUM		253
>   
>   /* PowerPC64 relocations defined by the ABIs */
>   #define R_PPC64_NONE    R_PPC_NONE
>
-- 
Thanks and Regards
R.Nageswara Sastry