netdev - [PATCH v2 bpf-next 10/11] selftests/bpf: pass all BPF .o's through BPF static linker

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Date:   Sat, 13 Mar 2021 11:35:36 -0800
From:   Andrii Nakryiko <andrii@...nel.org>
To:     <bpf@...r.kernel.org>, <netdev@...r.kernel.org>, <ast@...com>,
        <daniel@...earbox.net>
CC:     <andrii@...nel.org>, <kernel-team@...com>
Subject: [PATCH v2 bpf-next 10/11] selftests/bpf: pass all BPF .o's through BPF static linker

Pass all individual BPF object files (progs/*.o) through `bpftool gen object`
command to validate that BPF static linker doesn't corrupt them.

Signed-off-by: Andrii Nakryiko <andrii@...nel.org>
---
 tools/testing/selftests/bpf/.gitignore | 1 +
 tools/testing/selftests/bpf/Makefile   | 8 +++-----
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore
index 4866f6a21901..811da0ea3ecd 100644
--- a/tools/testing/selftests/bpf/.gitignore
+++ b/tools/testing/selftests/bpf/.gitignore
@@ -36,4 +36,5 @@ test_cpp
 /runqslower
 /bench
 *.ko
+*.bpfo
 xdpxceiver
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index dbca39f45382..7ed5690be237 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -355,12 +355,10 @@ $(TRUNNER_BPF_OBJS): $(TRUNNER_OUTPUT)/%.o:				\
 	$$(call $(TRUNNER_BPF_BUILD_RULE),$$<,$$@,			\
 					  $(TRUNNER_BPF_CFLAGS))
 
-$(TRUNNER_BPF_SKELS): $(TRUNNER_OUTPUT)/%.skel.h:			\
-		      $(TRUNNER_OUTPUT)/%.o				\
-		      $(BPFTOOL)					\
-		      | $(TRUNNER_OUTPUT)
+$(TRUNNER_BPF_SKELS): %.skel.h: %.o $(BPFTOOL) | $(TRUNNER_OUTPUT)
 	$$(call msg,GEN-SKEL,$(TRUNNER_BINARY),$$@)
-	$(Q)$$(BPFTOOL) gen skeleton $$< > $$@
+	$(Q)$$(BPFTOOL) gen object $$(<:.o=.bpfo) $$<
+	$(Q)$$(BPFTOOL) gen skeleton $$(<:.o=.bpfo) > $$@
 endif
 
 # ensure we set up tests.h header generation rule just once
-- 
2.24.1