| Message ID | 20211021123913.48833-1-pulehui@huawei.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | BPF |
| Headers | show |
| Series | [bpf-next] samples: bpf: Suppress readelf stderr when probing for BTF support | expand |
| Context | Check | Description |
|---|---|---|
| netdev/cover_letter | success | Single patches do not need cover letters |
| netdev/fixes_present | success | Fixes tag not required for -next series |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Clearly marked for bpf-next |
| netdev/subject_prefix | success | Link |
| netdev/cc_maintainers | success | CCed 13 of 13 maintainers |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | success | Errors and warnings before: 0 this patch: 0 |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/verify_fixes | success | No Fixes tag |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 15 lines checked |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
| netdev/header_inline | success | No static functions without inline keyword in header files |
| bpf/vmtest-bpf-next | success | VM_Test |
| bpf/vmtest-bpf-next-PR | success | PR summary |
Pu Lehui wrote: > When compiling bpf samples, the following warning appears: > > readelf: Error: Missing knowledge of 32-bit reloc types used in DWARF > sections of machine number 247 > readelf: Warning: unable to apply unsupported reloc type 10 to section > .debug_info > readelf: Warning: unable to apply unsupported reloc type 1 to section > .debug_info > readelf: Warning: unable to apply unsupported reloc type 10 to section > .debug_info > > Same problem was mentioned in commit 2f0921262ba9 ("selftests/bpf: > suppress readelf stderr when probing for BTF support"), let's use > readelf that supports btf. > > Signed-off-by: Pu Lehui <pulehui@huawei.com> > --- Thanks. Acked-by: John Fastabend <john.fastabend@gmail.com>
On 10/21/21 5:39 AM, Pu Lehui wrote: > When compiling bpf samples, the following warning appears: > > readelf: Error: Missing knowledge of 32-bit reloc types used in DWARF > sections of machine number 247 > readelf: Warning: unable to apply unsupported reloc type 10 to section > .debug_info > readelf: Warning: unable to apply unsupported reloc type 1 to section > .debug_info > readelf: Warning: unable to apply unsupported reloc type 10 to section > .debug_info > > Same problem was mentioned in commit 2f0921262ba9 ("selftests/bpf: > suppress readelf stderr when probing for BTF support"), let's use > readelf that supports btf. > > Signed-off-by: Pu Lehui <pulehui@huawei.com> Acked-by: Yonghong Song <yhs@fb.com>
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 2366242edb7c..a886dff1ba89 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -229,6 +229,7 @@ CLANG ?= clang OPT ?= opt LLVM_DIS ?= llvm-dis LLVM_OBJCOPY ?= llvm-objcopy +LLVM_READELF ?= llvm-readelf BTF_PAHOLE ?= pahole # Detect that we're cross compiling and use the cross compiler @@ -252,7 +253,7 @@ BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF) BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm') BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \ $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \ - readelf -S ./llvm_btf_verify.o | grep BTF; \ + $(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \ /bin/rm -f ./llvm_btf_verify.o) BPF_EXTRA_CFLAGS += -fno-stack-protector
When compiling bpf samples, the following warning appears: readelf: Error: Missing knowledge of 32-bit reloc types used in DWARF sections of machine number 247 readelf: Warning: unable to apply unsupported reloc type 10 to section .debug_info readelf: Warning: unable to apply unsupported reloc type 1 to section .debug_info readelf: Warning: unable to apply unsupported reloc type 10 to section .debug_info Same problem was mentioned in commit 2f0921262ba9 ("selftests/bpf: suppress readelf stderr when probing for BTF support"), let's use readelf that supports btf. Signed-off-by: Pu Lehui <pulehui@huawei.com> --- samples/bpf/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)