79 строки
2.5 KiB
Makefile
79 строки
2.5 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
|
|
#
|
|
# Makefile for compat_vdso
|
|
#
|
|
|
|
# Symbols present in the compat_vdso
|
|
compat_vdso-syms = rt_sigreturn
|
|
compat_vdso-syms += getcpu
|
|
compat_vdso-syms += flush_icache
|
|
|
|
COMPAT_CC := $(CC)
|
|
COMPAT_LD := $(LD)
|
|
|
|
COMPAT_CC_FLAGS := -march=rv32g -mabi=ilp32
|
|
COMPAT_LD_FLAGS := -melf32lriscv
|
|
|
|
# Files to link into the compat_vdso
|
|
obj-compat_vdso = $(patsubst %, %.o, $(compat_vdso-syms)) note.o
|
|
|
|
# Build rules
|
|
targets := $(obj-compat_vdso) compat_vdso.so compat_vdso.so.dbg compat_vdso.lds
|
|
obj-compat_vdso := $(addprefix $(obj)/, $(obj-compat_vdso))
|
|
|
|
obj-y += compat_vdso.o
|
|
CPPFLAGS_compat_vdso.lds += -P -C -U$(ARCH)
|
|
|
|
# Disable profiling and instrumentation for VDSO code
|
|
GCOV_PROFILE := n
|
|
KCOV_INSTRUMENT := n
|
|
KASAN_SANITIZE := n
|
|
UBSAN_SANITIZE := n
|
|
|
|
# Force dependency
|
|
$(obj)/compat_vdso.o: $(obj)/compat_vdso.so
|
|
|
|
# link rule for the .so file, .lds has to be first
|
|
$(obj)/compat_vdso.so.dbg: $(obj)/compat_vdso.lds $(obj-compat_vdso) FORCE
|
|
$(call if_changed,compat_vdsold)
|
|
LDFLAGS_compat_vdso.so.dbg = -shared -S -soname=linux-compat_vdso.so.1 \
|
|
--build-id=sha1 --hash-style=both --eh-frame-hdr
|
|
|
|
$(obj-compat_vdso): %.o: %.S FORCE
|
|
$(call if_changed_dep,compat_vdsoas)
|
|
|
|
# strip rule for the .so file
|
|
$(obj)/%.so: OBJCOPYFLAGS := -S
|
|
$(obj)/%.so: $(obj)/%.so.dbg FORCE
|
|
$(call if_changed,objcopy)
|
|
|
|
# Generate VDSO offsets using helper script
|
|
gen-compat_vdsosym := $(srctree)/$(src)/gen_compat_vdso_offsets.sh
|
|
quiet_cmd_compat_vdsosym = VDSOSYM $@
|
|
cmd_compat_vdsosym = $(NM) $< | $(gen-compat_vdsosym) | LC_ALL=C sort > $@
|
|
|
|
include/generated/compat_vdso-offsets.h: $(obj)/compat_vdso.so.dbg FORCE
|
|
$(call if_changed,compat_vdsosym)
|
|
|
|
# actual build commands
|
|
# The DSO images are built using a special linker script
|
|
# Make sure only to export the intended __compat_vdso_xxx symbol offsets.
|
|
quiet_cmd_compat_vdsold = VDSOLD $@
|
|
cmd_compat_vdsold = $(COMPAT_LD) $(ld_flags) $(COMPAT_LD_FLAGS) -T $(filter-out FORCE,$^) -o $@.tmp && \
|
|
$(OBJCOPY) $(patsubst %, -G __compat_vdso_%, $(compat_vdso-syms)) $@.tmp $@ && \
|
|
rm $@.tmp
|
|
|
|
# actual build commands
|
|
quiet_cmd_compat_vdsoas = VDSOAS $@
|
|
cmd_compat_vdsoas = $(COMPAT_CC) $(a_flags) $(COMPAT_CC_FLAGS) -c -o $@ $<
|
|
|
|
# install commands for the unstripped file
|
|
quiet_cmd_compat_vdso_install = INSTALL $@
|
|
cmd_compat_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/compat_vdso/$@
|
|
|
|
compat_vdso.so: $(obj)/compat_vdso.so.dbg
|
|
@mkdir -p $(MODLIB)/compat_vdso
|
|
$(call cmd,compat_vdso_install)
|
|
|
|
compat_vdso_install: compat_vdso.so
|