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From: Ard Biesheuvel <ardb+git@google.com>
To: linux-kernel@vger.kernel.org
Cc: linux-efi@vger.kernel.org, x86@kernel.org, mingo@kernel.org,
	 Ard Biesheuvel <ardb@kernel.org>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	 Dionna Amalie Glaze <dionnaglaze@google.com>,
	Kevin Loughlin <kevinloughlin@google.com>
Subject: [PATCH v5 1/6] vmlinux.lds: Include .data.rel[.local] into .data section
Date: Fri, 18 Apr 2025 16:12:55 +0200	[thread overview]
Message-ID: <20250418141253.2601348-9-ardb+git@google.com> (raw)
In-Reply-To: <20250418141253.2601348-8-ardb+git@google.com>

From: Ard Biesheuvel <ardb@kernel.org>

When running in -fPIC mode, the compiler may decide to emit statically
initialized data objects into .data.rel or .data.rel.local if they
contain absolute references to global or local objects, respectively,
which require fixing up at load time.

This distinction is irrelevant for the kernel, so fold .data.rel and
.data.rel.local into .data.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 include/asm-generic/vmlinux.lds.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 58a635a6d5bd..66409bc3a4e0 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -108,13 +108,13 @@ defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG)
 #define TEXT_MAIN .text
 #endif
 #if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG)
-#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L*
+#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data.rel.* .data..L* .data..compoundliteral* .data.$__unnamed_* .data.$L*
 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L*
 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..L* .bss..compoundliteral*
 #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
 #else
-#define DATA_MAIN .data
+#define DATA_MAIN .data .data.rel .data.rel.local
 #define SDATA_MAIN .sdata
 #define RODATA_MAIN .rodata
 #define BSS_MAIN .bss
-- 
2.49.0.805.g082f7c87e0-goog


  reply	other threads:[~2025-04-18 14:14 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-04-18 14:12 [PATCH v5 0/6] x86: Refactor and consolidate startup code Ard Biesheuvel
2025-04-18 14:12 ` Ard Biesheuvel [this message]
2025-04-18 14:12 ` [PATCH v5 2/6] x86/sev: Move noinstr NMI handling code into separate source file Ard Biesheuvel
2025-04-18 14:12 ` [PATCH v5 3/6] x86/sev: Split off startup code from core code Ard Biesheuvel
2025-04-23 15:22   ` Tom Lendacky
2025-04-23 15:50     ` Ard Biesheuvel
2025-04-24  9:37       ` Borislav Petkov
2025-04-24 15:34     ` [PATCH] x86/sev: Share the sev_secrets_pa value again Ingo Molnar
2025-04-24 16:04       ` Tom Lendacky
2025-04-18 14:12 ` [PATCH v5 4/6] x86/boot: Move SEV startup code into startup/ Ard Biesheuvel
2025-04-18 14:12 ` [PATCH v5 5/6] x86/boot: Drop RIP_REL_REF() uses from early SEV code Ard Biesheuvel
2025-04-18 14:13 ` [PATCH v5 6/6] x86/asm: Retire RIP_REL_REF() Ard Biesheuvel
2025-04-18 15:51   ` Uros Bizjak
2025-04-18 15:58     ` Ard Biesheuvel
2025-05-04  7:33       ` Uros Bizjak
2025-04-22 19:55 ` [PATCH v5 0/6] x86: Refactor and consolidate startup code Ingo Molnar
2025-04-22 21:09   ` Ard Biesheuvel

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