[Xen-devel] [PATCH v2] coverage: filter out libfdt.o and libelf.o

[Viktor Mitin <viktor.mitin.19@xxxxxxxxx>]

The patch resolves 'xencov' crashes in case of Aarch64.

All the .init.* sections are stripped after boot,
it means that anything in .init.data cannot be accessed anymore.
The build system explicitly compiles any .init binary without gcov option.
The problem is coming from libfdt and libelf.
The entire library is moved to .init using:
$(OBJCOPY) $(foreach s,$(SECTIONS),--rename-section .$(s)=.init.$(s)) $< $@
So we need to tell the top Makefile to filter out libfdt and libelf.

Reported-by: Viktor Mitin <viktor.mitin.19@xxxxxxxxx>
Suggested-by: Julien Grall <julien.grall@xxxxxxx>
Signed-off-by: Viktor Mitin <viktor.mitin.19@xxxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Tested-by: Viktor Mitin <viktor.mitin.19@xxxxxxxxx>

---

Changes from v1:

 - coverage: filtered out libelf as well
---
 xen/common/libelf/Makefile | 1 +
 xen/common/libfdt/Makefile | 1 +
 2 files changed, 2 insertions(+)

diff --git a/xen/common/libelf/Makefile b/xen/common/libelf/Makefile
index 5bf8f764f1..3d9e38f27e 100644
--- a/xen/common/libelf/Makefile
+++ b/xen/common/libelf/Makefile
@@ -1,4 +1,5 @@
 obj-bin-y := libelf.o
+nocov-y += libelf.o
 
 SECTIONS := text data $(SPECIAL_DATA_SECTIONS)
 
diff --git a/xen/common/libfdt/Makefile b/xen/common/libfdt/Makefile
index d81f54b6b8..c075bbf546 100644
--- a/xen/common/libfdt/Makefile
+++ b/xen/common/libfdt/Makefile
@@ -3,6 +3,7 @@ include Makefile.libfdt
 SECTIONS := text data $(SPECIAL_DATA_SECTIONS)
 
 obj-y += libfdt.o
+nocov-y += libfdt.o
 
 CFLAGS += -I$(BASEDIR)/include/xen/libfdt/
 
-- 
2.17.1


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