[DTrace-devel] [PATCH 3/5] kbuild: generate a linker map for vmlinux.o

[Kris Van Hees]

When CONFIG_BUILTIN_RANGES is set, a linker map for vmlinux.o needs to
be generated.  The generation of offset range data for builtin modules
depends on that linker map to know what offsets in an ELF section belong
to an object file for a particular builtin module.

Signed-off-by: Kris Van Hees <kris.van.hees at oracle.com>
---
 scripts/Makefile.vmlinux_o | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/scripts/Makefile.vmlinux_o b/scripts/Makefile.vmlinux_o
index 9b4ca83f0695..09219c2cb691 100644
--- a/scripts/Makefile.vmlinux_o
+++ b/scripts/Makefile.vmlinux_o
@@ -44,9 +44,12 @@ objtool-args = $(vmlinux-objtool-args-y) --link
 # Link of vmlinux.o used for section mismatch analysis
 # ---------------------------------------------------------------------------
 
+vmlinux-o-ld-args-$(CONFIG_BUILTIN_RANGES)		+= -Map=$@.map
+
 quiet_cmd_ld_vmlinux.o = LD      $@
       cmd_ld_vmlinux.o = \
 	$(LD) ${KBUILD_LDFLAGS} -r -o $@ \
+	$(vmlinux-o-ld-args-y) \
 	$(addprefix -T , $(initcalls-lds)) \
 	--whole-archive vmlinux.a --no-whole-archive \
 	--start-group $(KBUILD_VMLINUX_LIBS) --end-group \
-- 
2.39.2