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Message-ID: <163700774865.414.17082222045277684777.tip-bot2@tip-bot2>
Date: Mon, 15 Nov 2021 20:22:28 -0000
From: "tip-bot2 for Sean Christopherson" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Cedric Xing <cedric.xing@...el.com>,
Sean Christopherson <sean.j.christopherson@...el.com>,
Reinette Chatre <reinette.chatre@...el.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Jarkko Sakkinen <jarkko@...nel.org>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: x86/sgx] selftests/sgx: Fix a benign linker warning
The following commit has been merged into the x86/sgx branch of tip:
Commit-ID: 5064343fb155487362708bacc8c6ab9dc2c52bb8
Gitweb: https://git.kernel.org/tip/5064343fb155487362708bacc8c6ab9dc2c52bb8
Author: Sean Christopherson <sean.j.christopherson@...el.com>
AuthorDate: Mon, 15 Nov 2021 10:35:14 -08:00
Committer: Dave Hansen <dave.hansen@...ux.intel.com>
CommitterDate: Mon, 15 Nov 2021 11:33:53 -08:00
selftests/sgx: Fix a benign linker warning
The enclave binary (test_encl.elf) is built with only three sections (tcs,
text, and data) as controlled by its custom linker script.
If gcc is built with "--enable-linker-build-id" (this appears to be a
common configuration even if it is by default off) then gcc
will pass "--build-id" to the linker that will prompt it (the linker) to
write unique bits identifying the linked file to a ".note.gnu.build-id"
section.
The section ".note.gnu.build-id" does not exist in the test enclave
resulting in the following warning emitted by the linker:
/usr/bin/ld: warning: .note.gnu.build-id section discarded, --build-id
ignored
The test enclave does not use the build id within the binary so fix the
warning by passing a build id of "none" to the linker that will disable the
setting from any earlier "--build-id" options and thus disable the attempt
to write the build id to a ".note.gnu.build-id" section that does not
exist.
Link: https://lore.kernel.org/linux-sgx/20191017030340.18301-2-sean.j.christopherson@intel.com/
Suggested-by: Cedric Xing <cedric.xing@...el.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
Signed-off-by: Reinette Chatre <reinette.chatre@...el.com>
Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org>
Acked-by: Dave Hansen <dave.hansen@...ux.intel.com>
Link: https://lkml.kernel.org/r/ca0f8a81fc1e78af9bdbc6a88e0f9c37d82e53f2.1636997631.git.reinette.chatre@intel.com
---
tools/testing/selftests/sgx/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/sgx/Makefile b/tools/testing/selftests/sgx/Makefile
index 7f12d55..2956584 100644
--- a/tools/testing/selftests/sgx/Makefile
+++ b/tools/testing/selftests/sgx/Makefile
@@ -45,7 +45,7 @@ $(OUTPUT)/sign_key.o: sign_key.S
$(CC) $(HOST_CFLAGS) -c $< -o $@
$(OUTPUT)/test_encl.elf: test_encl.lds test_encl.c test_encl_bootstrap.S
- $(CC) $(ENCL_CFLAGS) -T $^ -o $@
+ $(CC) $(ENCL_CFLAGS) -T $^ -o $@ -Wl,--build-id=none
EXTRA_CLEAN := \
$(OUTPUT)/test_encl.elf \
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