ERROR: INT DW_ATE_unsigned_1 Error emitting BTF type

[Sedat Dilek]

Hi,

when building with pahole v1.20 and binutils v2.35.2 plus Clang
v12.0.0-rc1 and DWARF-v5 I see:
...
+ info BTF .btf.vmlinux.bin.o
+ [  != silent_ ]
+ printf   %-7s %s\n BTF .btf.vmlinux.bin.o
 BTF     .btf.vmlinux.bin.o
+ LLVM_OBJCOPY=/opt/binutils/bin/objcopy /opt/pahole/bin/pahole -J
.tmp_vmlinux.btf
[115] INT DW_ATE_unsigned_1 Error emitting BTF type
Encountered error while encoding BTF.
+ /opt/binutils/bin/objcopy --only-section=.BTF --set-section-flags
.BTF=alloc,readonly --strip-all .tmp_vmlinux.btf .btf.vmlinux.bin.o
+ printf \1
+ dd of=.btf.vmlinux.bin.o conv=notrunc bs=1 seek=16 status=none
+ kallsymso=
...
+ info BTFIDS vmlinux
+ [  != silent_ ]
+ printf   %-7s %s\n BTFIDS vmlinux
 BTFIDS  vmlinux
+ ./tools/bpf/resolve_btfids/resolve_btfids vmlinux
FAILED: load BTF from vmlinux: No such file or directory
+ on_exit
+ [ 255 -ne 0 ]
+ cleanup
+ rm -f .btf.vmlinux.bin.o
+ rm -f .tmp_System.map
+ rm -f .tmp_vmlinux.btf .tmp_vmlinux.kallsyms1
.tmp_vmlinux.kallsyms1.S .tmp_vmlinux.kallsyms1.o
.tmp_vmlinux.kallsyms2 .tmp_vmlinux.kallsyms2.S .tmp_vmlinux.kallsyms
2.o
+ rm -f System.map
+ rm -f vmlinux
+ rm -f vmlinux.o
make[3]: *** [Makefile:1166: vmlinux] Error 255

Looks like it does not matter to use
LLVM_OBJCOPY=/opt/llvm-toolchain/bin/llvm-objcopy:

+ info BTF .btf.vmlinux.bin.o
+ [  != silent_ ]
+ printf   %-7s %s\n BTF .btf.vmlinux.bin.o
 BTF     .btf.vmlinux.bin.o
+ LLVM_OBJCOPY=/opt/llvm-toolchain/bin/llvm-objcopy
/opt/pahole/bin/pahole -J .tmp_vmlinux.btf
[115] INT DW_ATE_unsigned_1 Error emitting BTF type
Encountered error while encoding BTF.

My make-line looks like this:

make V=1 -j4 HOSTCC=clang HOSTCXX=clang++
HOSTLD=/opt/binutils/bin/ld.bfd HOSTAR=/opt/binutils/bin/ar CC=clang
LD=/opt/binutils/bin/ld.
bfd AR=/opt/binutils/bin/ar NM=/opt/binutils/bin/nm
STRIP=/opt/binutils/bin/strip OBJCOPY=/opt/binutils/bin/objcopy
OBJDUMP=/opt/binutils/bin/objdump READELF=/opt/binu
tils/bin/readelf PAHOLE=/opt/pahole/bin/pahole
LOCALVERSION=-11-amd64-clang12-bfd KBUILD_VERBOSE=1
KBUILD_BUILD_HOST=iniza KBUILD_BUILD_USER=sedat.dilek@xxxxxxxxx
KBUILD_BUILD_TIMESTAMP=2021-02-05 bindeb-pkg
KDEB_PKGVERSION=5.11.0~rc6-11~bullseye+dileks1

My kernel-config is attached.

If you need further informations, please let me know.

Thanks.

Regards,
- Sedat -

Attachment: config-5.11.0-rc6-11-amd64-clang12-bfd
Description: Binary data