Andi Kleen | 2aae950 | 2007-07-21 17:10:01 +0200 | [diff] [blame] | 1 | # |
| 2 | # x86-64 vDSO. |
| 3 | # |
| 4 | |
| 5 | # files to link into the vdso |
Roland McGrath | 7f3646a | 2008-01-30 13:30:41 +0100 | [diff] [blame] | 6 | vobjs-y := vdso-note.o vclock_gettime.o vgetcpu.o vvar.o |
Andi Kleen | 2aae950 | 2007-07-21 17:10:01 +0200 | [diff] [blame] | 7 | |
| 8 | # files to link into kernel |
Roland McGrath | 2b9c97e | 2008-01-30 13:30:41 +0100 | [diff] [blame^] | 9 | obj-y := vma.o vdso.o |
Andi Kleen | 2aae950 | 2007-07-21 17:10:01 +0200 | [diff] [blame] | 10 | |
| 11 | vobjs := $(foreach F,$(vobjs-y),$(obj)/$F) |
| 12 | |
| 13 | $(obj)/vdso.o: $(obj)/vdso.so |
| 14 | |
Roland McGrath | 2b9c97e | 2008-01-30 13:30:41 +0100 | [diff] [blame^] | 15 | targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y) |
Andi Kleen | 2aae950 | 2007-07-21 17:10:01 +0200 | [diff] [blame] | 16 | |
| 17 | # The DSO images are built using a special linker script. |
| 18 | quiet_cmd_syscall = SYSCALL $@ |
| 19 | cmd_syscall = $(CC) -m elf_x86_64 -nostdlib $(SYSCFLAGS_$(@F)) \ |
| 20 | -Wl,-T,$(filter-out FORCE,$^) -o $@ |
| 21 | |
Sam Ravnborg | d746d64 | 2007-11-12 20:14:19 +0100 | [diff] [blame] | 22 | export CPPFLAGS_vdso.lds += -P -C |
Andi Kleen | 2aae950 | 2007-07-21 17:10:01 +0200 | [diff] [blame] | 23 | |
| 24 | vdso-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 |
| 27 | SYSCFLAGS_vdso.so = $(vdso-flags) |
Roland McGrath | f79eb83 | 2007-10-17 18:04:32 +0200 | [diff] [blame] | 28 | SYSCFLAGS_vdso.so.dbg = $(vdso-flags) |
Andi Kleen | 2aae950 | 2007-07-21 17:10:01 +0200 | [diff] [blame] | 29 | |
| 30 | $(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so |
| 31 | |
| 32 | $(obj)/vdso.so: $(src)/vdso.lds $(vobjs) FORCE |
Roland McGrath | f79eb83 | 2007-10-17 18:04:32 +0200 | [diff] [blame] | 33 | |
| 34 | $(obj)/vdso.so.dbg: $(src)/vdso.lds $(vobjs) FORCE |
Andi Kleen | 2aae950 | 2007-07-21 17:10:01 +0200 | [diff] [blame] | 35 | $(call if_changed,syscall) |
| 36 | |
Roland McGrath | f79eb83 | 2007-10-17 18:04:32 +0200 | [diff] [blame] | 37 | $(obj)/%.so: OBJCOPYFLAGS := -S |
| 38 | $(obj)/%.so: $(obj)/%.so.dbg FORCE |
| 39 | $(call if_changed,objcopy) |
| 40 | |
Andi Kleen | 037e20a | 2007-07-22 21:13:11 +0200 | [diff] [blame] | 41 | CFL := $(PROFILING) -mcmodel=small -fPIC -g0 -O2 -fasynchronous-unwind-tables -m64 |
Andi Kleen | 2aae950 | 2007-07-21 17:10:01 +0200 | [diff] [blame] | 42 | |
Sam Ravnborg | a0f97e0 | 2007-10-14 22:21:35 +0200 | [diff] [blame] | 43 | $(obj)/vclock_gettime.o: KBUILD_CFLAGS = $(CFL) |
| 44 | $(obj)/vgetcpu.o: KBUILD_CFLAGS = $(CFL) |
Andi Kleen | 2aae950 | 2007-07-21 17:10:01 +0200 | [diff] [blame] | 45 | |
Roland McGrath | 5b93049 | 2008-01-30 13:30:40 +0100 | [diff] [blame] | 46 | targets += vdso-syms.lds |
| 47 | obj-y += vdso-syms.lds |
| 48 | |
| 49 | # |
| 50 | # Match symbols in the DSO that look like VDSO*; produce a file of constants. |
| 51 | # |
| 52 | sed-vdsosym := -e 's/^00*/0/' \ |
| 53 | -e 's/^\([0-9a-fA-F]*\) . \(VDSO[a-zA-Z0-9_]*\)$$/\2 = 0x\1;/p' |
| 54 | quiet_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 McGrath | f79eb83 | 2007-10-17 18:04:32 +0200 | [diff] [blame] | 60 | quiet_cmd_vdso_install = INSTALL $@ |
| 61 | cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ |
| 62 | vdso.so: |
| 63 | @mkdir -p $(MODLIB)/vdso |
| 64 | $(call cmd,vdso_install) |
| 65 | |
| 66 | vdso_install: vdso.so |