From: Tobias Klauser <tklauser@distanz.ch>
To: Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Albert Ou <aou@eecs.berkeley.edu>
Cc: linux-riscv@lists.infradead.org,
Palmer Dabbelt <palmerdabbelt@google.com>
Subject: [PATCH] riscv: disable stack-protector for vDSO
Date: Wed, 29 Jul 2020 09:51:29 +0200 [thread overview]
Message-ID: <20200729075129.11538-1-tklauser@distanz.ch> (raw)
Currently, building the vDSO with clang leads assembler errors like the
following:
/tmp/vgettimeofday-1ae0d2.s: Assembler messages:
/tmp/vgettimeofday-1ae0d2.s:28: Error: bad expression
/tmp/vgettimeofday-1ae0d2.s:28: Error: illegal operands `auipc a2,%got_pcrel_hi(__stack_chk_guard)'
Disable the stack-protector for vDSO to fix these.
Link: https://github.com/ClangBuiltLinux/linux/issues/1112
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
---
arch/riscv/kernel/vdso/Makefile | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
index c8c9e40023c6..478e7338ddc1 100644
--- a/arch/riscv/kernel/vdso/Makefile
+++ b/arch/riscv/kernel/vdso/Makefile
@@ -16,6 +16,8 @@ vdso-syms += flush_icache
# Files to link into the vdso
obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o
+ccflags-y := -fno-stack-protector
+
ifneq ($(c-gettimeofday-y),)
CFLAGS_vgettimeofday.o += -fPIC -include $(c-gettimeofday-y)
endif
--
2.27.0
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next reply other threads:[~2020-07-29 7:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-29 7:51 Tobias Klauser [this message]
2020-07-31 3:58 ` [PATCH] riscv: disable stack-protector for vDSO Palmer Dabbelt
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