From: Roland McGrath <[email protected]>
This keeps an unstripped copy of the 64bit vDSO images built before they are
stripped and embedded in the kernel. The unstripped copies get installed
in $(MODLIB)/vdso/ by "make install" (or you can explicitly use the
subtarget "make vdso_install"). These files can be useful when they
contain source-level debugging information.
Signed-off-by: Roland McGrath <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
---
arch/x86_64/Makefile | 1 +
arch/x86_64/vdso/Makefile | 20 ++++++++++++++++----
2 files changed, 17 insertions(+), 4 deletions(-)
Index: linux/arch/x86_64/Makefile
===================================================================
--- linux.orig/arch/x86_64/Makefile
+++ linux/arch/x86_64/Makefile
@@ -120,6 +120,7 @@ vdso_install:
ifeq ($(CONFIG_IA32_EMULATION),y)
$(Q)$(MAKE) $(build)=arch/x86_64/ia32 $@
endif
+ $(Q)$(MAKE) $(build)=arch/x86_64/vdso $@
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
Index: linux/arch/x86_64/vdso/Makefile
===================================================================
--- linux.orig/arch/x86_64/vdso/Makefile
+++ linux/arch/x86_64/vdso/Makefile
@@ -13,7 +13,7 @@ vobjs := $(foreach F,$(vobjs-y),$(obj)/$
$(obj)/vdso.o: $(obj)/vdso.so
-targets += vdso.so vdso.lds $(vobjs-y) vdso-syms.o
+targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y) vdso-syms.o
# The DSO images are built using a special linker script.
quiet_cmd_syscall = SYSCALL $@
@@ -25,14 +25,18 @@ export CPPFLAGS_vdso.lds += -P -C -U$(AR
vdso-flags = -fPIC -shared -Wl,-soname=linux-vdso.so.1 \
$(call ld-option, -Wl$(comma)--hash-style=sysv) \
-Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
-SYSCFLAGS_vdso.so = $(vdso-flags)
+SYSCFLAGS_vdso.so.dbg = $(vdso-flags)
$(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so
-$(obj)/vdso.so: $(src)/vdso.lds $(vobjs) FORCE
+$(obj)/vdso.so.dbg: $(src)/vdso.lds $(vobjs) FORCE
$(call if_changed,syscall)
-CFL := $(PROFILING) -mcmodel=small -fPIC -g0 -O2 -fasynchronous-unwind-tables -m64
+$(obj)/%.so: OBJCOPYFLAGS := -S
+$(obj)/%.so: $(obj)/%.so.dbg FORCE
+ $(call if_changed,objcopy)
+
+CFL := $(PROFILING) -mcmodel=small -fPIC $(if $(CONFIG_DEBUG_INFO),-g,-g0) -O2 -fasynchronous-unwind-tables -m64
$(obj)/vclock_gettime.o: CFLAGS = $(CFL)
$(obj)/vgetcpu.o: CFLAGS = $(CFL)
@@ -47,3 +51,11 @@ $(obj)/built-in.o: ld_flags += -R $(obj)
SYSCFLAGS_vdso-syms.o = -r -d
$(obj)/vdso-syms.o: $(src)/vdso.lds $(vobjs) FORCE
$(call if_changed,syscall)
+
+quiet_cmd_vdso_install = INSTALL $@
+ cmd_vdso_install = cp $(obj)/[email protected] $(MODLIB)/vdso/$@
+vdso.so:
+ @mkdir -p $(MODLIB)/vdso
+ $(call cmd,vdso_install)
+
+vdso_install: vdso.so
-
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