From: Andrii Nakryiko <andriin@fb.com>
Date: Wed, 20 Nov 2019 23:07:40 -0800
Subject: selftests/bpf: Ensure no DWARF relocations for BPF object files
Patch-mainline: v5.5-rc1
Git-commit: ffc88174cdcf5f51fb7f6298fe9203a36c904f1f
References: bsc#1177028
Add -mattr=dwarfris attribute to llc to avoid having relocations against DWARF
data. These relocations make it impossible to inspect DWARF contents: all
strings are invalid.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191121070743.1309473-2-andriin@fb.com
Acked-by: Gary Lin <glin@suse.com>
---
tools/testing/selftests/bpf/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -161,7 +161,7 @@ $(OUTPUT)/flow_dissector_load.o: flow_di
define CLANG_BPF_BUILD_RULE
($(CLANG) $3 -O2 -target bpf -emit-llvm \
-c $1 -o - || echo "BPF obj compilation failed") | \
- $(LLC) -march=bpf -mcpu=probe $4 -filetype=obj -o $2
+ $(LLC) -mattr=dwarfris -march=bpf -mcpu=probe $4 -filetype=obj -o $2
endef
# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
define CLANG_NOALU32_BPF_BUILD_RULE