linux-kernel - [PATCH 1/2] sparc/module: Add R_SPARC

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Message-Id: <20250609-b4-sparc-relocs-v1-1-aa52631735af@protonmail.com>
Date: Mon, 09 Jun 2025 20:53:11 +0700
From: Koakuma via B4 Relay <devnull+koachan.protonmail.com@...nel.org>
To: "David S. Miller" <davem@...emloft.net>, 
 Andreas Larsson <andreas@...sler.com>, 
 Nathan Chancellor <nathan@...nel.org>, 
 Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>
Cc: sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org, 
 llvm@...ts.linux.dev, Koakuma <koachan@...tonmail.com>
Subject: [PATCH 1/2] sparc/module: Add R_SPARC_UA64 relocation handling

From: Koakuma <koachan@...tonmail.com>

This is needed so that the kernel can handle R_SPARC_UA64 relocations,
which is emitted by LLVM's IAS.

Signed-off-by: Koakuma <koachan@...tonmail.com>
---
 arch/sparc/include/asm/elf_64.h | 1 +
 arch/sparc/kernel/module.c      | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/sparc/include/asm/elf_64.h b/arch/sparc/include/asm/elf_64.h
index 8fb09eec8c3e796a9a79aa0a7877842ceb7ea6d3..694ed081cf8d99adf70be25e5dc0e30a45f70398 100644
--- a/arch/sparc/include/asm/elf_64.h
+++ b/arch/sparc/include/asm/elf_64.h
@@ -58,6 +58,7 @@
 #define R_SPARC_7		43
 #define R_SPARC_5		44
 #define R_SPARC_6		45
+#define R_SPARC_UA64		54

 /* Bits present in AT_HWCAP, primarily for Sparc32.  */
 #define HWCAP_SPARC_FLUSH       0x00000001
diff --git a/arch/sparc/kernel/module.c b/arch/sparc/kernel/module.c
index b8c51cc23d96944037494f13d2d65a43bb187729..6e3d4dde4f9ab33040b300c40d5fd5d0584e166d 100644
--- a/arch/sparc/kernel/module.c
+++ b/arch/sparc/kernel/module.c
@@ -87,6 +87,7 @@ int apply_relocate_add(Elf_Shdr *sechdrs,
 			break;
 #ifdef CONFIG_SPARC64
 		case R_SPARC_64:
+		case R_SPARC_UA64:
 			location[0] = v >> 56;
 			location[1] = v >> 48;
 			location[2] = v >> 40;

-- 
2.49.0