[RFC v8 14/20] um: lkl: plug in the build system
Hajime Tazaki
thehajime at gmail.com
Tue Jan 19 21:27:19 EST 2021
Basic Makefiles for building library of library mode. Add a new
architecture specific target for installing the resulting library files
and headers.
To make LKL binaries build, we can specify the SUBARCH name as "lkl"
to switch the output file of build: kernel (default), or library
(library mode). Those modes are not able to be ON at the same time.
To build on library mode, users do the following:
make defconfig ARCH=um SUBARCH=lkl
make ARCH=um SUBARCH=lkl
Signed-off-by: Octavian Purdila <tavi.purdila at gmail.com>
Signed-off-by: Hajime Tazaki <thehajime at gmail.com>
---
arch/um/Makefile | 27 +++++++++----
arch/um/configs/lkl_defconfig | 73 +++++++++++++++++++++++++++++++++++
arch/um/kernel/Makefile | 14 ++++---
arch/um/lkl/um/Makefile | 4 ++
tools/um/Makefile | 3 +-
tools/um/Targets | 3 ++
6 files changed, 111 insertions(+), 13 deletions(-)
create mode 100644 arch/um/configs/lkl_defconfig
create mode 100644 arch/um/lkl/um/Makefile
diff --git a/arch/um/Makefile b/arch/um/Makefile
index bce0cccae085..6ddc900604a5 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -34,6 +34,10 @@ ifneq ($(filter $(SUBARCH),x86 x86_64 i386),)
HEADER_ARCH := x86
endif
+ifeq ($(SUBARCH),lkl)
+ HEADER_ARCH := um/lkl
+endif
+
ifdef CONFIG_64BIT
KBUILD_CFLAGS += -mcmodel=large
endif
@@ -97,19 +101,27 @@ KBUILD_CFLAGS += $(KERNEL_DEFINES)
LDFLAGS_vmlinux += -r
INSTALL_PATH=$(objtree)/tools/um
-all: linux
-pre-2nd: linux.o
- @echo " INSTALL $(INSTALL_PATH)/lib/$<"
- @mkdir -p $(INSTALL_PATH)/lib/
- @cp $< $(INSTALL_PATH)/lib/
+ifeq ($(CONFIG_UMMODE_LIB),y)
+all: pre-2nd
+ $(Q)$(MAKE) -C $(srctree)/tools/um
-PHONY += linux.o
+pre-2nd: linux.o um_headers_install
+
+else
+all: linux
linux: pre-2nd
$(Q)$(MAKE) -C $(srctree)/tools/um
$(Q)cp $(objtree)/tools/um/uml/linux $(objtree)/
$(Q)cp $(objtree)/linux $(objtree)/vmlinux
+pre-2nd: linux.o
+endif
+ @echo " INSTALL $(INSTALL_PATH)/lib/$<"
+ @mkdir -p $(INSTALL_PATH)/lib/
+ @cp $< $(INSTALL_PATH)/lib/
+
+PHONY += linux.o
linux.o: vmlinux
#revert vmlinux file from vmlinux.a
ifneq ("$(wildcard vmlinux.a)","")
@@ -117,7 +129,8 @@ ifneq ("$(wildcard vmlinux.a)","")
endif
$(Q)cp vmlinux vmlinux.a
@echo " LINK $@"
- $(Q)$(OBJCOPY) -R .eh_frame $< $@
+# symbols in ipc/sem.c conflict with sem_init(3) etc, thus localize the kernel one.
+ $(Q)$(OBJCOPY) -R .eh_frame -L sem_init -L sem_post -L sem_wait -L sem_destroy $< $@
define archhelp
echo '* linux - Binary kernel image (./linux) - for backward'
diff --git a/arch/um/configs/lkl_defconfig b/arch/um/configs/lkl_defconfig
new file mode 100644
index 000000000000..7bea9e5b1b09
--- /dev/null
+++ b/arch/um/configs/lkl_defconfig
@@ -0,0 +1,73 @@
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_CGROUPS=y
+CONFIG_BLK_CGROUP=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CGROUP_CPUACCT=y
+# CONFIG_PID_NS is not set
+CONFIG_SYSFS_DEPRECATED=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_SLAB=y
+CONFIG_UMMODE_LIB=y
+CONFIG_HOSTFS=y
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_SSL=y
+CONFIG_NULL_CHAN=y
+CONFIG_PORT_CHAN=y
+CONFIG_PTY_CHAN=y
+CONFIG_TTY_CHAN=y
+CONFIG_XTERM_CHAN=y
+CONFIG_CON_CHAN="pts"
+CONFIG_SSL_CHAN="pts"
+CONFIG_UML_SOUND=m
+CONFIG_UML_NET=y
+CONFIG_UML_NET_ETHERTAP=y
+CONFIG_UML_NET_TUNTAP=y
+CONFIG_UML_NET_SLIP=y
+CONFIG_UML_NET_DAEMON=y
+CONFIG_UML_NET_MCAST=y
+CONFIG_UML_NET_SLIRP=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_BLK_DEV_BSG is not set
+CONFIG_IOSCHED_BFQ=m
+CONFIG_BINFMT_MISC=m
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+# CONFIG_IPV6 is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_BLK_DEV_UBD=y
+CONFIG_BLK_DEV_LOOP=m
+CONFIG_BLK_DEV_NBD=m
+CONFIG_DUMMY=m
+CONFIG_TUN=m
+CONFIG_PPP=m
+CONFIG_SLIP=m
+CONFIG_LEGACY_PTY_COUNT=32
+# CONFIG_HW_RANDOM is not set
+CONFIG_UML_RANDOM=y
+CONFIG_EXT4_FS=y
+CONFIG_REISERFS_FS=y
+CONFIG_BTRFS_FS=y
+CONFIG_QUOTA=y
+CONFIG_AUTOFS4_FS=m
+CONFIG_ISO9660_FS=m
+CONFIG_JOLIET=y
+CONFIG_VFAT_FS=y
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ISO8859_1=y
+# CONFIG_RAID6_PQ_BENCHMARK is not set
+CONFIG_DEBUG_INFO=y
+CONFIG_FRAME_WARN=1024
+CONFIG_DEBUG_KERNEL=y
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 9b63831a69e1..781c39b21403 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -14,17 +14,21 @@ CPPFLAGS_vmlinux.lds := -DSTART=$(LDS_START) \
$(LDS_EXTRA)
extra-y := vmlinux.lds
-obj-y = config.o exec.o exitcode.o irq.o ksyms.o mem.o \
- physmem.o process.o ptrace.o reboot.o sigio.o \
- signal.o syscall.o sysrq.o time.o tlb.o trap.o \
- um_arch.o umid.o maccess.o kmsg_dump.o skas/
+obj-y = config.o exitcode.o irq.o ksyms.o \
+ process.o reboot.o sigio.o \
+ signal.o syscall.o time.o \
+ um_arch.o umid.o maccess.o kmsg_dump.o
+
+ifndef CONFIG_UMMODE_LIB
+obj-y += exec.o mem.o physmem.o ptrace.o sysrq.o tlb.o trap.o skas/
+endif
obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
obj-$(CONFIG_GPROF) += gprof_syms.o
obj-$(CONFIG_GCOV) += gmon_syms.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
-obj-y += user_syms.o
+obj-$(CONFIG_MMU) += user_syms.o
USER_OBJS := config.o
diff --git a/arch/um/lkl/um/Makefile b/arch/um/lkl/um/Makefile
new file mode 100644
index 000000000000..b29b598a1bac
--- /dev/null
+++ b/arch/um/lkl/um/Makefile
@@ -0,0 +1,4 @@
+include/generated/user_constants.h: $(srctree)/arch/um/lkl/um/user_constants.h
+ $(Q)cp -f $^ $@
+
+obj-y = bootmem.o console.o cpu.o delay.o setup.o syscalls.o threads.o unimplemented.o
diff --git a/tools/um/Makefile b/tools/um/Makefile
index 0fdf77261e74..877d0bdefa67 100644
--- a/tools/um/Makefile
+++ b/tools/um/Makefile
@@ -32,6 +32,7 @@ export CFLAGS += -I$(OUTPUT)/include -Iinclude -Wall -g -O2 -Wextra -fPIC \
-Wno-unused-parameter \
-Wno-missing-field-initializers -fno-strict-aliasing
+-include $(OUTPUT)/../../include/config/auto.conf
-include Targets
TARGETS := $(progs-y:%=$(OUTPUT)%)
@@ -69,6 +70,6 @@ clean:
$(call QUIET_CLEAN, $(TARGETS))$(RM) $(TARGETS)
FORCE: ;
-.PHONY: all clean FORCE
+.PHONY: all clean FORCE $(OUTPUT)/../../include/config/auto.conf
.IGNORE: clean
.NOTPARALLEL : lib/linux.o
diff --git a/tools/um/Targets b/tools/um/Targets
index cfe1d3c3c6ff..e8b43c7758fe 100644
--- a/tools/um/Targets
+++ b/tools/um/Targets
@@ -1,4 +1,7 @@
+ifneq ($(CONFIG_UMMODE_LIB),y)
progs-y += uml/linux
+endif
+
LDLIBS_linux-y := -lrt -lpthread -lutil
LDFLAGS_linux-y := -no-pie -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
LDFLAGS_linux-$(CONFIG_STATIC_LINK) += -static
--
2.21.0 (Apple Git-122.2)
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