blob: 6a665dd09848c5f934b52101211845b01d34f3de [file] [log] [blame]
Andi Kleen2aae9502007-07-21 17:10:01 +02001#
2# x86-64 vDSO.
3#
4
5# files to link into the vdso
Roland McGrath7f3646a2008-01-30 13:30:41 +01006vobjs-y := vdso-note.o vclock_gettime.o vgetcpu.o vvar.o
Andi Kleen2aae9502007-07-21 17:10:01 +02007
8# files to link into kernel
Roland McGrath2b9c97e2008-01-30 13:30:41 +01009obj-y := vma.o vdso.o
Andi Kleen2aae9502007-07-21 17:10:01 +020010
11vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
12
13$(obj)/vdso.o: $(obj)/vdso.so
14
Roland McGrath2b9c97e2008-01-30 13:30:41 +010015targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y)
Andi Kleen2aae9502007-07-21 17:10:01 +020016
17# The DSO images are built using a special linker script.
18quiet_cmd_syscall = SYSCALL $@
19 cmd_syscall = $(CC) -m elf_x86_64 -nostdlib $(SYSCFLAGS_$(@F)) \
20 -Wl,-T,$(filter-out FORCE,$^) -o $@
21
Sam Ravnborgd746d642007-11-12 20:14:19 +010022export CPPFLAGS_vdso.lds += -P -C
Andi Kleen2aae9502007-07-21 17:10:01 +020023
24vdso-flags = -fPIC -shared -Wl,-soname=linux-vdso.so.1 \
25 $(call ld-option, -Wl$(comma)--hash-style=sysv) \
26 -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
27SYSCFLAGS_vdso.so = $(vdso-flags)
Roland McGrathf79eb832007-10-17 18:04:32 +020028SYSCFLAGS_vdso.so.dbg = $(vdso-flags)
Andi Kleen2aae9502007-07-21 17:10:01 +020029
30$(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so
31
32$(obj)/vdso.so: $(src)/vdso.lds $(vobjs) FORCE
Roland McGrathf79eb832007-10-17 18:04:32 +020033
34$(obj)/vdso.so.dbg: $(src)/vdso.lds $(vobjs) FORCE
Andi Kleen2aae9502007-07-21 17:10:01 +020035 $(call if_changed,syscall)
36
Roland McGrathf79eb832007-10-17 18:04:32 +020037$(obj)/%.so: OBJCOPYFLAGS := -S
38$(obj)/%.so: $(obj)/%.so.dbg FORCE
39 $(call if_changed,objcopy)
40
Andi Kleen037e20a2007-07-22 21:13:11 +020041CFL := $(PROFILING) -mcmodel=small -fPIC -g0 -O2 -fasynchronous-unwind-tables -m64
Andi Kleen2aae9502007-07-21 17:10:01 +020042
Sam Ravnborga0f97e02007-10-14 22:21:35 +020043$(obj)/vclock_gettime.o: KBUILD_CFLAGS = $(CFL)
44$(obj)/vgetcpu.o: KBUILD_CFLAGS = $(CFL)
Andi Kleen2aae9502007-07-21 17:10:01 +020045
Roland McGrath5b930492008-01-30 13:30:40 +010046targets += vdso-syms.lds
47obj-y += vdso-syms.lds
48
49#
50# Match symbols in the DSO that look like VDSO*; produce a file of constants.
51#
52sed-vdsosym := -e 's/^00*/0/' \
53 -e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$$/\2 = 0x\1;/p'
54quiet_cmd_vdsosym = VDSOSYM $@
55 cmd_vdsosym = $(NM) $< | sed -n $(sed-vdsosym) | LC_ALL=C sort > $@
56
57$(obj)/%-syms.lds: $(obj)/%.so.dbg FORCE
58 $(call if_changed,vdsosym)
59
Roland McGrathf79eb832007-10-17 18:04:32 +020060quiet_cmd_vdso_install = INSTALL $@
61 cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
62vdso.so:
63 @mkdir -p $(MODLIB)/vdso
64 $(call cmd,vdso_install)
65
66vdso_install: vdso.so