Martin Schwidefsky | b020632 | 2008-12-25 13:38:36 +0100 | [diff] [blame] | 1 | # List of files in the vdso, has to be asm only for now |
| 2 | |
Heiko Carstens | 907fa06 | 2016-06-20 14:08:32 +0200 | [diff] [blame] | 3 | KCOV_INSTRUMENT := n |
| 4 | |
Martin Schwidefsky | 249c543 | 2016-01-05 13:29:38 +0100 | [diff] [blame] | 5 | obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o |
Martin Schwidefsky | b020632 | 2008-12-25 13:38:36 +0100 | [diff] [blame] | 6 | |
| 7 | # Build rules |
| 8 | |
| 9 | targets := $(obj-vdso64) vdso64.so vdso64.so.dbg |
| 10 | obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) |
| 11 | |
| 12 | KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS)) |
| 13 | KBUILD_AFLAGS_64 += -m64 -s |
| 14 | |
| 15 | KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS)) |
| 16 | KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin |
| 17 | KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \ |
Martin Schwidefsky | aad1b68 | 2015-08-07 08:55:48 +0200 | [diff] [blame] | 18 | $(call cc-ldoption, -Wl$(comma)--hash-style=both) |
Martin Schwidefsky | b020632 | 2008-12-25 13:38:36 +0100 | [diff] [blame] | 19 | |
| 20 | $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64) |
| 21 | $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64) |
| 22 | |
| 23 | obj-y += vdso64_wrapper.o |
| 24 | extra-y += vdso64.lds |
| 25 | CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) |
| 26 | |
Christian Borntraeger | c42d8c7 | 2016-09-12 14:37:20 +0200 | [diff] [blame] | 27 | # Disable gcov profiling and ubsan for VDSO code |
Peter Oberparleiter | add7490 | 2011-05-23 10:24:31 +0200 | [diff] [blame] | 28 | GCOV_PROFILE := n |
Christian Borntraeger | c42d8c7 | 2016-09-12 14:37:20 +0200 | [diff] [blame] | 29 | UBSAN_SANITIZE := n |
Peter Oberparleiter | add7490 | 2011-05-23 10:24:31 +0200 | [diff] [blame] | 30 | |
Martin Schwidefsky | b020632 | 2008-12-25 13:38:36 +0100 | [diff] [blame] | 31 | # Force dependency (incbin is bad) |
| 32 | $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so |
| 33 | |
| 34 | # link rule for the .so file, .lds has to be first |
Vasily Gorbik | 2636487 | 2018-10-19 15:37:01 +0200 | [diff] [blame] | 35 | $(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) FORCE |
Martin Schwidefsky | b020632 | 2008-12-25 13:38:36 +0100 | [diff] [blame] | 36 | $(call if_changed,vdso64ld) |
| 37 | |
| 38 | # strip rule for the .so file |
| 39 | $(obj)/%.so: OBJCOPYFLAGS := -S |
| 40 | $(obj)/%.so: $(obj)/%.so.dbg FORCE |
| 41 | $(call if_changed,objcopy) |
| 42 | |
| 43 | # assembly rules for the .S files |
Vasily Gorbik | 2636487 | 2018-10-19 15:37:01 +0200 | [diff] [blame] | 44 | $(obj-vdso64): %.o: %.S FORCE |
Martin Schwidefsky | b020632 | 2008-12-25 13:38:36 +0100 | [diff] [blame] | 45 | $(call if_changed_dep,vdso64as) |
| 46 | |
| 47 | # actual build commands |
| 48 | quiet_cmd_vdso64ld = VDSO64L $@ |
Vasily Gorbik | 2636487 | 2018-10-19 15:37:01 +0200 | [diff] [blame] | 49 | cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter %.lds %.o,$^) -o $@ |
Martin Schwidefsky | b020632 | 2008-12-25 13:38:36 +0100 | [diff] [blame] | 50 | quiet_cmd_vdso64as = VDSO64A $@ |
| 51 | cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $< |
| 52 | |
| 53 | # install commands for the unstripped file |
| 54 | quiet_cmd_vdso_install = INSTALL $@ |
| 55 | cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ |
| 56 | |
| 57 | vdso64.so: $(obj)/vdso64.so.dbg |
| 58 | @mkdir -p $(MODLIB)/vdso |
| 59 | $(call cmd,vdso_install) |
| 60 | |
| 61 | vdso_install: vdso64.so |