projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 8512287a NL |
2 | hostprogs-y := vdsomunge |
| 3 | ||
| 4 | obj-vdso := vgettimeofday.o datapage.o | |
| 5 | ||
| 6 | # Build rules | |
| 7 | targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.so.raw vdso.lds | |
| 8 | obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) | |
| 9 | ||
| d33ce23b NL |
10 | ccflags-y := -fPIC -fno-common -fno-builtin -fno-stack-protector |
| 11 | ccflags-y += -DDISABLE_BRANCH_PROFILING | |
| 12 | ||
| c5d0e49e JD |
13 | ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8 |
| 14 | ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \ | |
| 5ccd3bd9 | 15 | -z max-page-size=4096 -nostdlib -shared $(ldflags-y) \ |
| 89ff7131 | 16 | --hash-style=sysv --build-id \ |
| fe00e50b | 17 | -T |
| 8512287a | 18 | |
| f80f6531 NL |
19 | obj-$(CONFIG_VDSO) += vdso.o |
| 20 | extra-$(CONFIG_VDSO) += vdso.lds | |
| 8512287a NL |
21 | CPPFLAGS_vdso.lds += -P -C -U$(ARCH) |
| 22 | ||
| 23 | CFLAGS_REMOVE_vdso.o = -pg | |
| 24 | ||
| 25 | # Force -O2 to avoid libgcc dependencies | |
| 26 | CFLAGS_REMOVE_vgettimeofday.o = -pg -Os | |
| 27 | CFLAGS_vgettimeofday.o = -O2 | |
| 28 | ||
| 29 | # Disable gcov profiling for VDSO code | |
| 30 | GCOV_PROFILE := n | |
| 31 | ||
| 75851720 DV |
32 | # Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. |
| 33 | KCOV_INSTRUMENT := n | |
| 34 | ||
| 8512287a NL |
35 | # Force dependency |
| 36 | $(obj)/vdso.o : $(obj)/vdso.so | |
| 37 | ||
| 38 | # Link rule for the .so file | |
| fe00e50b MY |
39 | $(obj)/vdso.so.raw: $(obj)/vdso.lds $(obj-vdso) FORCE |
| 40 | $(call if_changed,ld) | |
| 8512287a NL |
41 | |
| 42 | $(obj)/vdso.so.dbg: $(obj)/vdso.so.raw $(obj)/vdsomunge FORCE | |
| 43 | $(call if_changed,vdsomunge) | |
| 44 | ||
| 45 | # Strip rule for the .so file | |
| 46 | $(obj)/%.so: OBJCOPYFLAGS := -S | |
| 47 | $(obj)/%.so: $(obj)/%.so.dbg FORCE | |
| 48 | $(call if_changed,objcopy) | |
| 49 | ||
| 8512287a NL |
50 | quiet_cmd_vdsomunge = MUNGE $@ |
| 51 | cmd_vdsomunge = $(objtree)/$(obj)/vdsomunge $< $@ | |
| 52 | ||
| 53 | # | |
| 54 | # Install the unstripped copy of vdso.so.dbg. If our toolchain | |
| 55 | # supports build-id, install .build-id links as well. | |
| 56 | # | |
| 57 | # Cribbed from arch/x86/vdso/Makefile. | |
| 58 | # | |
| 59 | quiet_cmd_vdso_install = INSTALL $< | |
| 60 | define cmd_vdso_install | |
| 61 | cp $< "$(MODLIB)/vdso/vdso.so"; \ | |
| 62 | if readelf -n $< | grep -q 'Build ID'; then \ | |
| 63 | buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \ | |
| 64 | first=`echo $$buildid | cut -b-2`; \ | |
| 65 | last=`echo $$buildid | cut -b3-`; \ | |
| 66 | mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \ | |
| 67 | ln -sf "../../vdso.so" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \ | |
| 68 | fi | |
| 69 | endef | |
| 70 | ||
| 71 | $(MODLIB)/vdso: FORCE | |
| 72 | @mkdir -p $(MODLIB)/vdso | |
| 73 | ||
| 74 | PHONY += vdso_install | |
| 2e8d696b | 75 | vdso_install: $(obj)/vdso.so.dbg $(MODLIB)/vdso |
| 8512287a | 76 | $(call cmd,vdso_install) |