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authorThomas Gleixner <tglx@linutronix.de>2007-10-11 11:17:10 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 11:17:10 +0200
commit7648b1330c335601b7c09c25f77a03cda128fcab (patch)
tree8b92b501dc746b135bf9019472b425e8ef052714 /arch/x86/vdso/Makefile
parent185f3d38900f750a4566f87cde6a178f3595a115 (diff)
x86_64: move vdso
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/vdso/Makefile')
-rw-r--r--arch/x86/vdso/Makefile49
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile
new file mode 100644
index 00000000000..8d03de029d9
--- /dev/null
+++ b/arch/x86/vdso/Makefile
@@ -0,0 +1,49 @@
+#
+# x86-64 vDSO.
+#
+
+# files to link into the vdso
+# vdso-start.o has to be first
+vobjs-y := vdso-start.o vdso-note.o vclock_gettime.o vgetcpu.o vvar.o
+
+# files to link into kernel
+obj-y := vma.o vdso.o vdso-syms.o
+
+vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
+
+$(obj)/vdso.o: $(obj)/vdso.so
+
+targets += vdso.so vdso.lds $(vobjs-y) vdso-syms.o
+
+# The DSO images are built using a special linker script.
+quiet_cmd_syscall = SYSCALL $@
+ cmd_syscall = $(CC) -m elf_x86_64 -nostdlib $(SYSCFLAGS_$(@F)) \
+ -Wl,-T,$(filter-out FORCE,$^) -o $@
+
+export CPPFLAGS_vdso.lds += -P -C -U$(ARCH)
+
+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 = $(vdso-flags)
+
+$(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so
+
+$(obj)/vdso.so: $(src)/vdso.lds $(vobjs) FORCE
+ $(call if_changed,syscall)
+
+CFL := $(PROFILING) -mcmodel=small -fPIC -g0 -O2 -fasynchronous-unwind-tables -m64
+
+$(obj)/vclock_gettime.o: CFLAGS = $(CFL)
+$(obj)/vgetcpu.o: CFLAGS = $(CFL)
+
+# We also create a special relocatable object that should mirror the symbol
+# table and layout of the linked DSO. With ld -R we can then refer to
+# these symbols in the kernel code rather than hand-coded addresses.
+extra-y += vdso-syms.o
+$(obj)/built-in.o: $(obj)/vdso-syms.o
+$(obj)/built-in.o: ld_flags += -R $(obj)/vdso-syms.o
+
+SYSCFLAGS_vdso-syms.o = -r -d
+$(obj)/vdso-syms.o: $(src)/vdso.lds $(vobjs) FORCE
+ $(call if_changed,syscall)