1# SPDX-License-Identifier: GPL-2.0
2
3# List of files in the vdso, has to be asm only for now
4
5ARCH_REL_TYPE_ABS := R_PPC_JUMP_SLOT|R_PPC_GLOB_DAT|R_PPC_ADDR32|R_PPC_ADDR24|R_PPC_ADDR16|R_PPC_ADDR16_LO|R_PPC_ADDR16_HI|R_PPC_ADDR16_HA|R_PPC_ADDR14|R_PPC_ADDR14_BRTAKEN|R_PPC_ADDR14_BRNTAKEN|R_PPC_REL24
6include $(srctree)/lib/vdso/Makefile
7
8obj-vdso32 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o getcpu.o
9
10ifneq ($(c-gettimeofday-y),)
11  CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y)
12  CFLAGS_vgettimeofday.o += $(DISABLE_LATENT_ENTROPY_PLUGIN)
13  CFLAGS_vgettimeofday.o += $(call cc-option, -fno-stack-protector)
14  CFLAGS_vgettimeofday.o += -DDISABLE_BRANCH_PROFILING
15  CFLAGS_vgettimeofday.o += -ffreestanding -fasynchronous-unwind-tables
16  CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE)
17endif
18
19# Build rules
20
21ifdef CROSS32_COMPILE
22    VDSOCC := $(CROSS32_COMPILE)gcc
23else
24    VDSOCC := $(CC)
25endif
26
27CC32FLAGS :=
28ifdef CONFIG_PPC64
29CC32FLAGS += -m32
30KBUILD_CFLAGS := $(filter-out -mcmodel=medium -mabi=elfv1 -mabi=elfv2 -mcall-aixdesc,$(KBUILD_CFLAGS))
31endif
32
33targets := $(obj-vdso32) vdso32.so.dbg vgettimeofday.o
34obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
35
36GCOV_PROFILE := n
37KCOV_INSTRUMENT := n
38UBSAN_SANITIZE := n
39KASAN_SANITIZE := n
40
41ccflags-y := -shared -fno-common -fno-builtin -nostdlib \
42	-Wl,-soname=linux-vdso32.so.1 -Wl,--hash-style=both
43asflags-y := -D__VDSO32__ -s
44
45obj-y += vdso32_wrapper.o
46targets += vdso32.lds
47CPPFLAGS_vdso32.lds += -P -C -Upowerpc
48
49# link rule for the .so file, .lds has to be first
50$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) $(obj)/vgettimeofday.o FORCE
51	$(call if_changed,vdso32ld_and_check)
52
53# assembly rules for the .S files
54$(obj-vdso32): %.o: %.S FORCE
55	$(call if_changed_dep,vdso32as)
56$(obj)/vgettimeofday.o: %.o: %.c FORCE
57	$(call if_changed_dep,vdso32cc)
58
59# Generate VDSO offsets using helper script
60gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
61quiet_cmd_vdsosym = VDSOSYM $@
62      cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
63
64include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE
65	$(call if_changed,vdsosym)
66
67# actual build commands
68quiet_cmd_vdso32ld_and_check = VDSO32L $@
69      cmd_vdso32ld_and_check = $(VDSOCC) $(c_flags) $(CC32FLAGS) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^) ; $(cmd_vdso_check)
70quiet_cmd_vdso32as = VDSO32A $@
71      cmd_vdso32as = $(VDSOCC) $(a_flags) $(CC32FLAGS) -c -o $@ $<
72quiet_cmd_vdso32cc = VDSO32C $@
73      cmd_vdso32cc = $(VDSOCC) $(c_flags) $(CC32FLAGS) -c -o $@ $<
74