linux-kernel - [PATCH v2] scripts: Do not strip .rela.dyn section

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Message-Id: <20250403134200.385077-1-alexghiti@rivosinc.com>
Date: Thu,  3 Apr 2025 15:42:00 +0200
From: Alexandre Ghiti <alexghiti@...osinc.com>
To: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Alexandre Ghiti <alex@...ti.fr>,
	Björn Töpel <bjorn@...osinc.com>,
	Masahiro Yamada <masahiroy@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas@...sle.eu>,
	Ard Biesheuvel <ardb@...nel.org>,
	Charlie Jenkins <charlie@...osinc.com>,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	linux-kbuild@...r.kernel.org
Cc: Alexandre Ghiti <alexghiti@...osinc.com>
Subject: [PATCH v2] scripts: Do not strip .rela.dyn section

riscv uses the .rela.dyn section to relocate the kernel at runtime but
that section is stripped from vmlinux. That prevents kexec to
successfully load vmlinux since it does not contain the relocations info
needed.

Fixes: 71d815bf5dfd ("kbuild: Strip runtime const RELA sections correctly")
Signed-off-by: Alexandre Ghiti <alexghiti@...osinc.com>
---
 scripts/Makefile.lib | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index cad20f0e66ee..0a1f1e67a0ed 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -377,7 +377,7 @@ quiet_cmd_objcopy = OBJCOPY $@
 cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
 
 quiet_cmd_strip_relocs = RSTRIP  $@
-cmd_strip_relocs = $(OBJCOPY) --remove-section='.rel*' $@
+cmd_strip_relocs = $(OBJCOPY) --remove-section='.rel*' --remove-section=!.rela.dyn $@
 
 # Gzip
 # ---------------------------------------------------------------------------
-- 
2.39.2