[kvm-unit-tests PATCH 1/6] arm: keep efi debug information in a separate file

[Nadav Amit <nadav.amit@gmail.com>]

From: Nadav Amit <namit@vmware.com>

Debugging tests that run on EFI is hard because the debug information is
not included in the EFI file. Dump it into a separeate .debug file to
allow the use of gdb or pretty_print_stacks script.

Signed-off-by: Nadav Amit <namit@vmware.com>
---
 arm/Makefile.common | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arm/Makefile.common b/arm/Makefile.common
index d60cf8c..f904702 100644
--- a/arm/Makefile.common
+++ b/arm/Makefile.common
@@ -69,7 +69,7 @@ FLATLIBS = $(libcflat) $(LIBFDT_archive) $(libeabi)
 ifeq ($(CONFIG_EFI),y)
 %.so: EFI_LDFLAGS += -defsym=EFI_SUBSYSTEM=0xa --no-undefined
 %.so: %.o $(FLATLIBS) $(SRCDIR)/arm/efi/elf_aarch64_efi.lds $(cstart.o)
-	$(CC) $(CFLAGS) -c -o $(@:.so=.aux.o) $(SRCDIR)/lib/auxinfo.c \
+	$(CC) $(CFLAGS) -c -g -o $(@:.so=.aux.o) $(SRCDIR)/lib/auxinfo.c \
 		-DPROGNAME=\"$(@:.so=.efi)\" -DAUXFLAGS=$(AUXFLAGS)
 	$(LD) $(EFI_LDFLAGS) -o $@ -T $(SRCDIR)/arm/efi/elf_aarch64_efi.lds \
 		$(filter %.o, $^) $(FLATLIBS) $(@:.so=.aux.o) \
@@ -78,6 +78,9 @@ ifeq ($(CONFIG_EFI),y)
 
 %.efi: %.so
 	$(call arch_elf_check, $^)
+	$(OBJCOPY) --only-keep-debug $^ $@.debug
+	$(OBJCOPY) --strip-debug $^
+	$(OBJCOPY) --add-gnu-debuglink=$@.debug $^
 	$(OBJCOPY) \
 		-j .text -j .sdata -j .data -j .dynamic -j .dynsym \
 		-j .rel -j .rela -j .rel.* -j .rela.* -j .rel* -j .rela* \
-- 
2.34.1