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From: Jesse Taube <jesse@rivosinc.com>
To: linux-riscv@lists.infradead.org
Cc: Ard Biesheuvel <ardb@kernel.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Bill Wendling <morbo@google.com>,
	Justin Stitt <justinstitt@google.com>,
	Jesse Taube <jesse@rivosinc.com>,
	Alexandre Ghiti <alexghiti@rivosinc.com>,
	Conor Dooley <conor.dooley@microchip.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Wende Tan <twd2.me@gmail.com>,
	Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
	Sami Tolvanen <samitolvanen@google.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Baoquan He <bhe@redhat.com>,
	"Mike Rapoport (IBM)" <rppt@kernel.org>,
	"Vishal Moola (Oracle)" <vishal.moola@gmail.com>,
	linux-kernel@vger.kernel.org, llvm@lists.linux.dev
Subject: [PATCH v4 1/4] RISC-V: pi: Force hidden visibility for all symbol references
Date: Tue,  9 Jul 2024 13:39:34 -0400	[thread overview]
Message-ID: <20240709173937.510084-2-jesse@rivosinc.com> (raw)
In-Reply-To: <20240709173937.510084-1-jesse@rivosinc.com>

Eliminate all GOT entries in the .pi section, by forcing hidden
visibility for all symbol references, which informs the compiler that
such references will be resolved at link time without the need for
allocating GOT entries.

Include linux/hidden.h in Makefile, like arm64, for the
hidden visibility attribute.

Signed-off-by: Jesse Taube <jesse@rivosinc.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
---
V1 -> V2:
 - New patch
V2 -> V3:
 - No changes
V3 -> V4:
 - No changes
---
 arch/riscv/kernel/pi/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/kernel/pi/Makefile b/arch/riscv/kernel/pi/Makefile
index 50bc5ef7dd2f..1ef7584be0c3 100644
--- a/arch/riscv/kernel/pi/Makefile
+++ b/arch/riscv/kernel/pi/Makefile
@@ -5,6 +5,7 @@ KBUILD_CFLAGS	:= $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) -fpie \
 		   -Os -DDISABLE_BRANCH_PROFILING $(DISABLE_STACKLEAK_PLUGIN) \
 		   $(call cc-option,-mbranch-protection=none) \
 		   -I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \
+		   -include $(srctree)/include/linux/hidden.h \
 		   -D__DISABLE_EXPORTS -ffreestanding \
 		   -fno-asynchronous-unwind-tables -fno-unwind-tables \
 		   $(call cc-option,-fno-addrsig)
-- 
2.45.2


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  reply	other threads:[~2024-07-09 17:39 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-07-09 17:39 [PATCH v4 0/4] RISC-V: Parse DT for Zkr to seed KASLR Jesse Taube
2024-07-09 17:39 ` Jesse Taube [this message]
2024-07-09 17:39 ` [PATCH v4 2/4] RISC-V: lib: Add pi aliases for string functions Jesse Taube
2024-07-09 17:39 ` [PATCH v4 3/4] RISC-V: pi: Add kernel/pi/pi.h Jesse Taube
2024-07-09 17:39 ` [PATCH v4 4/4] RISC-V: Use Zkr to seed KASLR base address Jesse Taube
2024-07-10 14:23   ` Conor Dooley
2024-08-14 14:10 ` [PATCH v4 0/4] RISC-V: Parse DT for Zkr to seed KASLR patchwork-bot+linux-riscv

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