[POWERPC] powerpc vDSO: install unstripped copies on disk

This keeps an unstripped copy of the vDSO images built before they are
stripped and embedded in the kernel.  The unstripped copies get installed in
$(MODLIB)/vdso/ by "make install".  These files can be useful when they
contain source-level debugging information.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 16 insertions, 3 deletions

diff --git a/arch/powerpc/kernel/vdso64/Makefile b/arch/powerpc/kernel/vdso64/Makefile
index 43af9b2a6f3b..fa7f1b8f3e50 100644
--- a/arch/powerpc/kernel/vdso64/Makefile
+++ b/arch/powerpc/kernel/vdso64/Makefile
@@ -4,10 +4,10 @@ obj-vdso64 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o
 
 # Build rules
 
-targets := $(obj-vdso64) vdso64.so
+targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
 obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
 
-EXTRA_CFLAGS := -shared -s -fno-common -fno-builtin
+EXTRA_CFLAGS := -shared -fno-common -fno-builtin
 EXTRA_CFLAGS += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
                 $(call ld-option, -Wl$(comma)--hash-style=sysv)
 EXTRA_AFLAGS := -D__VDSO64__ -s
@@ -20,9 +20,14 @@ CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
 $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
 
 # link rule for the .so file, .lds has to be first
-$(obj)/vdso64.so: $(src)/vdso64.lds $(obj-vdso64)
+$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64)
         $(call if_changed,vdso64ld)
 
+# strip rule for the .so file
+$(obj)/%.so: OBJCOPYFLAGS := -S
+$(obj)/%.so: $(obj)/%.so.dbg FORCE
+        $(call if_changed,objcopy)
+
 # assembly rules for the .S files
 $(obj-vdso64): %.o: %.S
         $(call if_changed_dep,vdso64as)
@@ -33,4 +38,12 @@ quiet_cmd_vdso64ld = VDSO64L $@
 quiet_cmd_vdso64as = VDSO64A $@
       cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
 
+# install commands for the unstripped file
+quiet_cmd_vdso_install = INSTALL $@
+      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
+
+vdso64.so: $(obj)/vdso64.so.dbg
+        @mkdir -p $(MODLIB)/vdso
+        $(call cmd,vdso_install)
 
+vdso_install: vdso64.so