[RFC,v1,2/2] arch: um: turn BTF_TYPEINFO support off
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Message ID 20200127193549.187419-3-brendanhiggins@google.com
State New
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Series
  • arch: um: turn BTF_TYPEINFO support off
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Commit Message

Brendan Higgins Jan. 27, 2020, 7:35 p.m. UTC
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(+)

Comments

Anton Ivanov Jan. 28, 2020, 8:12 a.m. UTC | #1
On 27/01/2020 19:35, Brendan Higgins wrote:
> 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
> 

Acked-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>

Patch
diff mbox series

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