From: Brendan Higgins <brendanhiggins@google.com>
To: jdike@addtoit.com, richard@nod.at,
anton.ivanov@cambridgegreys.com, akpm@linux-foundation.org,
changbin.du@intel.com, yamada.masahiro@socionext.com,
rdunlap@infradead.org, keescook@chromium.org,
andriy.shevchenko@linux.intel.com
Cc: linux-um@lists.infradead.org, linux-kernel@vger.kernel.org,
davidgow@google.com, heidifahim@google.com,
Brendan Higgins <brendanhiggins@google.com>
Subject: [RFC v1 2/2] arch: um: turn BTF_TYPEINFO support off
Date: Mon, 27 Jan 2020 11:35:49 -0800 [thread overview]
Message-ID: <20200127193549.187419-3-brendanhiggins@google.com> (raw)
In-Reply-To: <20200127193549.187419-1-brendanhiggins@google.com>
Currently CONFIG_DEBUG_INFO_BTF=y doesn't work on UML:
scripts/link-vmlinux.sh: line 106: 17463 Segmentation fault LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1}
objcopy: --change-section-vma .BTF=0x0000000000000000 never used
objcopy: --change-section-lma .BTF=0x0000000000000000 never used
objcopy: error: the input file '.btf.vmlinux.bin' is empty
Failed to generate BTF for vmlinux
Try to disable CONFIG_DEBUG_INFO_BTF
make: *** [Makefile:1078: vmlinux] Error 1
So turn off ARCH_HAS_BTF_TYPEINFO support off for the UM architecture.
Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
---
arch/um/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 0917f8443c285..53e13d8b210e0 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -6,6 +6,7 @@ config UML
bool
default y
select ARCH_HAS_KCOV
+ select ARCH_NO_BTF_TYPEINFO
select ARCH_NO_PREEMPT
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_SECCOMP_FILTER
--
2.25.0.341.g760bfbb309-goog
next prev parent reply other threads:[~2020-01-27 19:36 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-27 19:35 [RFC v1 0/2] " Brendan Higgins
2020-01-27 19:35 ` [RFC v1 1/2] kbuild: add arch specific dependency for BTF support Brendan Higgins
2020-01-28 3:27 ` Masahiro Yamada
2020-01-28 7:25 ` Brendan Higgins
2020-01-27 19:35 ` Brendan Higgins [this message]
2020-01-28 8:12 ` [RFC v1 2/2] arch: um: turn BTF_TYPEINFO support off Anton Ivanov
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