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From: Daniel Palmer <daniel@thingy.jp>
To: w@1wt.eu, linux@weissschuh.net
Cc: linux-kernel@vger.kernel.org, Daniel Palmer <daniel@thingy.jp>
Subject: [RFC PATCH v2 01/10] elf: Add relocation types used by nolibc
Date: Wed,  4 Feb 2026 21:45:33 +0900	[thread overview]
Message-ID: <20260204124542.523567-2-daniel@thingy.jp> (raw)
In-Reply-To: <20260204124542.523567-1-daniel@thingy.jp>

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@thingy.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
+
+#endif /* _LINUX_ELF_R_H */
diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index 819ded2d39de..3d18543d5460 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -4,6 +4,7 @@
 
 #include <linux/types.h>
 #include <linux/elf-em.h>
+#include <linux/elf-r.h>
 
 /* 32-bit ELF base types. */
 typedef __u32	Elf32_Addr;
-- 
2.51.0


  reply	other threads:[~2026-02-04 12:46 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-04 12:45 [RFC PATCH v2 00/10] nolibc: Add static-pie support Daniel Palmer
2026-02-04 12:45 ` Daniel Palmer [this message]
2026-02-07 15:35   ` [RFC PATCH v2 01/10] elf: Add relocation types used by nolibc Willy Tarreau
2026-02-16 20:33   ` Thomas Weißschuh
2026-02-04 12:45 ` [RFC PATCH v2 02/10] tools/nolibc: crt: Split _start_c() into stack-only and normal parts Daniel Palmer
2026-02-07 15:45   ` Willy Tarreau
2026-02-08  1:40     ` Daniel Palmer
2026-02-16 20:42   ` Thomas Weißschuh
2026-02-04 12:45 ` [RFC PATCH v2 03/10] tools/nolibc: Add basic ELF self-relocation support for static PIE Daniel Palmer
2026-02-07 15:49   ` Willy Tarreau
2026-02-04 12:45 ` [RFC PATCH v2 04/10] tools/nolibc: m68k: Add relocation support Daniel Palmer
2026-02-16 20:51   ` Thomas Weißschuh
2026-02-04 12:45 ` [RFC PATCH v2 05/10] tools/nolibc: x86: " Daniel Palmer
2026-02-16 21:06   ` Thomas Weißschuh
2026-02-04 12:45 ` [RFC PATCH v2 06/10] tools/nolibc: riscv: " Daniel Palmer
2026-02-04 12:45 ` [RFC PATCH v2 07/10] tools/nolibc: arm: " Daniel Palmer
2026-02-04 12:45 ` [RFC PATCH v2 08/10] tools/nolibc: sh: " Daniel Palmer
2026-02-04 12:45 ` [RFC PATCH v2 09/10] tools/nolibc: ppc: " Daniel Palmer
2026-02-04 12:45 ` [RFC PATCH v2 10/10] selftests/nolibc: Add option for building with -static-pie Daniel Palmer
2026-02-16 20:59   ` Thomas Weißschuh
2026-02-07 15:34 ` [RFC PATCH v2 00/10] nolibc: Add static-pie support Willy Tarreau
2026-02-08  1:35   ` Daniel Palmer

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