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| author | Toke Høiland-Jørgensen <toke@redhat.com> | 2021-07-05 12:38:41 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-07-05 21:56:30 +0200 |
| commit | 5a0ae9872d5cb5f27590eed168d4b3b144350ed7 (patch) | |
| tree | 48356e321c2f3bd8f1aaf656b6ddf8d744910004 /samples | |
| parent | 0fc4dcc13f090c941abfab453a24945a4005b350 (diff) | |
| download | lwn-5a0ae9872d5cb5f27590eed168d4b3b144350ed7.tar.gz lwn-5a0ae9872d5cb5f27590eed168d4b3b144350ed7.zip | |
bpf, samples: Add -fno-asynchronous-unwind-tables to BPF Clang invocation
The samples/bpf Makefile currently compiles BPF files in a way that will
produce an .eh_frame section, which will in turn confuse libbpf and produce
errors when loading BPF programs, like:
libbpf: elf: skipping unrecognized data section(32) .eh_frame
libbpf: elf: skipping relo section(33) .rel.eh_frame for section(32) .eh_frame
Fix this by instruction Clang not to produce this section, as it's useless
for BPF anyway.
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210705103841.180260-1-toke@redhat.com
Diffstat (limited to 'samples')
| -rw-r--r-- | samples/bpf/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 520434ea966f..036998d11ded 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -331,6 +331,7 @@ $(obj)/%.o: $(src)/%.c -Wno-gnu-variable-sized-type-not-at-end \ -Wno-address-of-packed-member -Wno-tautological-compare \ -Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \ + -fno-asynchronous-unwind-tables \ -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \ -O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \ $(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \ |