linux-kernel - Re: [RFC PATCH v2 01/10] elf: Add relocation types used by nolibc

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Message-ID: <aYdbuCbWA_jUcKP_@1wt.eu>
Date: Sat, 7 Feb 2026 16:35:20 +0100
From: Willy Tarreau <w@....eu>
To: Daniel Palmer <daniel@...ngy.jp>
Cc: linux@...ssschuh.net, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v2 01/10] elf: Add relocation types used by nolibc

On Wed, Feb 04, 2026 at 09:45:33PM +0900, Daniel Palmer wrote:
> nolibc based programs are gaining the ability to relocate themselves
> so that they can support PIE without needing a linker or special
> crt from the toolchain.
> 
> Add the required relocation types.
> 
> Signed-off-by: Daniel Palmer <daniel@...ngy.jp>
> ---
>  include/uapi/linux/elf-r.h | 27 +++++++++++++++++++++++++++
>  include/uapi/linux/elf.h   |  1 +
>  2 files changed, 28 insertions(+)
>  create mode 100644 include/uapi/linux/elf-r.h
> 
> diff --git a/include/uapi/linux/elf-r.h b/include/uapi/linux/elf-r.h
> new file mode 100644
> index 000000000000..a1dce23104a7
> --- /dev/null
> +++ b/include/uapi/linux/elf-r.h
> @@ -0,0 +1,27 @@
> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> +#ifndef _LINUX_ELF_R_H
> +#define _LINUX_ELF_R_H
> +
> +/* These constants define various ELF relocation types */
> +#define R_386_RELATIVE		8
> +
> +#define R_68K_RELATIVE		22
> +
> +#define R_AARCH64_RELATIVE	1027
> +
> +#define R_AMD64_RELATIVE	8
> +
> +#define R_ARM_RELATIVE		23
> +
> +#define R_LARCH_RELATIVE	3
> +
> +#define R_PPC_RELATIVE		22
> +
> +#define R_RISCV_RELATIVE	3
> +
> +#define R_SH_RELATIVE		165
> +
> +#define R_SPARC_NONE		0
> +#define R_SPARC_RELATIVE	22

Maybe a comment indicating where to find these values would be helpful
for future architectures ?

Willy