projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
| eefacd1d GH |
2 | # |
| 3 | # Building a vDSO image for AArch64. | |
| 4 | # | |
| 5 | # Author: Will Deacon <will.deacon@arm.com> | |
| 6 | # Heavily based on the vDSO Makefiles for other archs. | |
| 7 | # | |
| 8 | ||
| 9 | obj-vdso := note.o datapage.o sigreturn.o gettimeofday.o | |
| 10 | ||
| 11 | # Build rules | |
| 12 | targets := $(obj-vdso) vdso.so vdso.so.dbg | |
| 13 | obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) | |
| 14 | ||
| 95b6204d ND |
15 | ccflags-y := -shared -fno-common -fno-builtin -nostdlib -fPIC -Wl,-shared -g \ |
| 16 | -Wl,-soname=linux-vdso.so.1 -Wl,--hash-style=sysv | |
| eefacd1d GH |
17 | |
| 18 | # Disable gcov profiling for VDSO code | |
| 19 | GCOV_PROFILE := n | |
| 20 | ||
| 21 | ||
| 22 | obj-y += vdso.o | |
| 23 | extra-y += vdso.lds | |
| 24 | CPPFLAGS_vdso.lds += -P -C -U$(ARCH) | |
| 25 | ||
| 26 | # Force dependency | |
| 27 | $(obj)/vdso.o : $(obj)/vdso.so | |
| 28 | ||
| 29 | # Link rule for the .so file, .lds has to be first | |
| 0ff8e00f | 30 | $(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE |
| eefacd1d GH |
31 | $(call if_changed,vdsold) |
| 32 | ||
| 33 | ||
| 34 | # Strip rule for the .so file | |
| 35 | $(obj)/%.so: OBJCOPYFLAGS := -S | |
| 36 | $(obj)/%.so: $(obj)/%.so.dbg FORCE | |
| 37 | $(call if_changed,objcopy) | |
| 38 | ||
| 39 | # Generate VDSO offsets using helper script | |
| 40 | gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh | |
| 41 | quiet_cmd_vdsosym = VDSOSYM $@ | |
| 0ff8e00f | 42 | cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ |
| eefacd1d GH |
43 | |
| 44 | include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE | |
| 45 | $(call if_changed,vdsosym) | |
| 46 | ||
| 47 | ||
| 48 | ||
| 49 | # Assembly rules for the .S files | |
| 50 | ||
| 51 | sigreturn.o : sigreturn.S | |
| 52 | $(call if_changed_dep,vdsoas) | |
| 53 | ||
| 54 | note.o : note.S | |
| 55 | $(call if_changed_dep,vdsoas) | |
| 56 | ||
| 57 | datapage.o : datapage.S | |
| 58 | $(call if_changed_dep,vdsoas) | |
| 59 | ||
| 60 | gettimeofday.o : gettimeofday.c FORCE | |
| 61 | $(call if_changed_dep,vdsocc) | |
| 62 | ||
| 63 | # Actual build commands | |
| 64 | quiet_cmd_vdsold = VDSOL $@ | |
| 0ff8e00f | 65 | cmd_vdsold = $(CC) $(c_flags) -Wl,-n -Wl,-T $(real-prereqs) -o $@ |
| eefacd1d GH |
66 | quiet_cmd_vdsoas = VDSOA $@ |
| 67 | cmd_vdsoas = $(CC) $(a_flags) -c -o $@ $< | |
| 68 | quiet_cmd_vdsocc = VDSOA $@ | |
| 69 | cmd_vdsocc = $(CC) $(c_flags) -c -o $@ $< | |
| 70 | ||
| 71 | # Install commands for the unstripped file | |
| 72 | quiet_cmd_vdso_install = INSTALL $@ | |
| 73 | cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ | |
| 74 | ||
| 75 | vdso.so: $(obj)/vdso.so.dbg | |
| 76 | @mkdir -p $(MODLIB)/vdso | |
| 77 | $(call cmd,vdso_install) | |
| 78 | ||
| 79 | vdso_install: vdso.so |