Fix: NULL pointer dereference of THIS_MODULE with built-in modules

[lttng-modules.git] / probes / Kbuild

TOP_LTTNG_MODULES_DIR := $(shell dirname $(lastword $(MAKEFILE_LIST)))/..

include $(TOP_LTTNG_MODULES_DIR)/Makefile.ABI.workarounds

ccflags-y += -I$(TOP_LTTNG_MODULES_DIR)

obj-$(CONFIG_LTTNG) += lttng-probe-sched.o
obj-$(CONFIG_LTTNG) += lttng-probe-irq.o
obj-$(CONFIG_LTTNG) += lttng-probe-timer.o
obj-$(CONFIG_LTTNG) += lttng-probe-kmem.o
obj-$(CONFIG_LTTNG) += lttng-probe-module.o
obj-$(CONFIG_LTTNG) += lttng-probe-power.o
obj-$(CONFIG_LTTNG) += lttng-probe-statedump.o

i2c_dep = $(srctree)/include/trace/events/i2c.h
ifneq ($(wildcard $(i2c_dep)),)
  obj-$(CONFIG_LTTNG) += lttng-probe-i2c.o
endif

ifneq ($(CONFIG_KVM),)
  obj-$(CONFIG_LTTNG) += lttng-probe-kvm.o
  ifneq ($(CONFIG_X86),)
    kvm_dep_lapic = $(srctree)/arch/x86/kvm/lapic.h
    ifneq ($(wildcard $(kvm_dep_lapic)),)
      kvm_dep = $(srctree)/virt/kvm/iodev.h $(srctree)/include/kvm/iodev.h
      ifneq ($(wildcard $(kvm_dep)),)
        CFLAGS_lttng-probe-kvm-x86.o += -I$(srctree)/virt/kvm
        CFLAGS_lttng-probe-kvm-x86-mmu.o += -I$(srctree)/virt/kvm
        obj-$(CONFIG_LTTNG) +=  $(shell \
          if [ $(VERSION) -ge 3 \
            -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
            echo "lttng-probe-kvm-x86.o" ; fi;)
        obj-$(CONFIG_LTTNG) +=  $(shell \
          if [ $(VERSION) -ge 3 \
            -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
            echo "lttng-probe-kvm-x86-mmu.o" ; fi;)
      else
        $(warning File $(kvm_dep) not found. Probe "kvm" x86-specific is disabled. Use full kernel source tree to enable it.)
      endif # $(wildcard $(kvm_dep))
    else
      $(warning File $(kvm_dep_lapic) not found. Probe "kvm" x86-specific is disabled. Use full kernel source tree to enable it.)
    endif # $(wildcard $(kvm_dep_lapic))
  endif # CONFIG_X86
endif # CONFIG_KVM

ifneq ($(CONFIG_X86),)
  x86_irq_vectors_dep = $(srctree)/arch/x86/include/asm/trace/irq_vectors.h

  ifneq ($(wildcard $(x86_irq_vectors_dep)),)
    obj-$(CONFIG_LTTNG) += lttng-probe-x86-irq-vectors.o
  endif # $(wildcard $(x86_irq_vectors_dep))

  x86_exceptions_dep = $(srctree)/arch/x86/include/asm/trace/exceptions.h

  ifneq ($(wildcard $(x86_exceptions_dep)),)
    obj-$(CONFIG_LTTNG) += lttng-probe-x86-exceptions.o
  endif # $(wildcard $(x86_exceptions_dep))
endif # CONFIG_X86

obj-$(CONFIG_LTTNG) +=  $(shell \
  if [ $(VERSION) -ge 3 \
    -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 33 \) ] ; then \
    echo "lttng-probe-signal.o" ; fi;)

ifneq ($(CONFIG_BLOCK),)
  # need blk_cmd_buf_len
  ifneq ($(CONFIG_EVENT_TRACING),)
    obj-$(CONFIG_LTTNG) += lttng-probe-block.o
  endif # CONFIG_EVENT_TRACING
endif # CONFIG_BLOCK

ifneq ($(CONFIG_NET),)
  obj-$(CONFIG_LTTNG) += lttng-probe-napi.o
  obj-$(CONFIG_LTTNG) += lttng-probe-skb.o
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 3 \
      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 37 \) ] ; then \
      echo "lttng-probe-net.o" ; fi;)
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 4 \
      -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 1 \) ] ; then \
      echo "lttng-probe-sock.o" ; fi;)
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 4 \
      -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 1 \) ] ; then \
      echo "lttng-probe-udp.o" ; fi;)
endif # CONFIG_NET

ifneq ($(CONFIG_SND_SOC),)
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 3 \
      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
      echo "lttng-probe-asoc.o" ; fi;)
endif # CONFIG_SND_SOC

ifneq ($(CONFIG_EXT3_FS),)
  ext3_dep = $(srctree)/fs/ext3/*.h
  ext3_dep_check = $(wildcard $(ext3_dep))
  ext3 = $(shell \
    if [ $(VERSION) -ge 4 -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 1 \) ] ; then \
      if [ \( $(VERSION) -ge 4 -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 4 \) \) -a \
        -z "$(ext3_dep_check)" ] ; then \
        echo "warn" ; \
        exit ; \
      fi; \
      echo "lttng-probe-ext3.o" ; \
    fi;)
  ifeq ($(ext3),warn)
    $(warning Files $(ext3_dep) not found. Probe "ext3" is disabled. Use full kernel source tree to enable it.)
    ext3 =
  endif # $(ext3),warn
  obj-$(CONFIG_LTTNG) += $(ext3)
endif # CONFIG_EXT3_FS

ifneq ($(CONFIG_GPIOLIB),)
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 3 ] ; then \
      echo "lttng-probe-gpio.o" ; fi;)
endif # CONFIG_GPIOLIB

ifneq ($(CONFIG_JBD2),)
  obj-$(CONFIG_LTTNG) += lttng-probe-jbd2.o
endif # CONFIG_JBD2

ifneq ($(CONFIG_JBD),)
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 4 \
      -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 1 \) ] ; then \
      echo "lttng-probe-jbd.o" ; fi;)
endif # CONFIG_JBD

ifneq ($(CONFIG_REGULATOR),)
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 3 \
      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
      echo "lttng-probe-regulator.o" ; fi;)
endif # CONFIG_REGULATOR

ifneq ($(CONFIG_SCSI),)
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 3 \
      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 35 \) ] ; then \
      echo "lttng-probe-scsi.o" ; fi;)
endif # CONFIG_SCSI

obj-$(CONFIG_LTTNG) += $(shell \
  if [ $(VERSION) -ge 3 \
    -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 36 \) ] ; then \
    echo "lttng-probe-vmscan.o" ; fi;)

# lock probe does not work, so disabling it for now
#ifneq ($(CONFIG_LOCKDEP),)
#  obj-$(CONFIG_LTTNG) += lttng-probe-lock.o
#endif # CONFIG_LOCKDEP

ifneq ($(CONFIG_BTRFS_FS),)
  btrfs_dep = $(srctree)/fs/btrfs/*.h
  btrfs = $(shell \
    if [ $(VERSION) -ge 3 \
      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 39 \) ] ; then \
      echo "lttng-probe-btrfs.o" ; fi;)
  ifneq ($(btrfs),)
    ifeq ($(wildcard $(btrfs_dep)),)
      $(warning Files $(btrfs_dep) not found. Probe "btrfs" is disabled. Use full kernel source tree to enable it.)
      btrfs =
    endif # $(wildcard $(btrfs_dep))
  endif # $(btrfs)
  obj-$(CONFIG_LTTNG) += $(btrfs)
endif # CONFIG_BTRFS_FS

obj-$(CONFIG_LTTNG) +=  $(shell \
  if [ $(VERSION) -ge 3 \
    -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 38 \) ] ; then \
    echo "lttng-probe-compaction.o" ; fi;)

ifneq ($(CONFIG_EXT4_FS),)
  ext4_dep = $(srctree)/fs/ext4/*.h
  ext4 = lttng-probe-ext4.o
  ifeq ($(wildcard $(ext4_dep)),)
    $(warning Files $(ext4_dep) not found. Probe "ext4" is disabled. Use full kernel source tree to enable it.)
    ext4 =
  endif # $(wildcard $(ext4_dep))
  obj-$(CONFIG_LTTNG) += $(ext4)
endif # CONFIG_EXT4_FS

obj-$(CONFIG_LTTNG) +=  $(shell \
  if [ $(VERSION) -ge 4 \
    -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 4 \) ] ; then \
    echo "lttng-probe-printk.o" ; fi;)

ifneq ($(CONFIG_FRAME_WARN),0)
  CFLAGS_lttng-probe-printk.o += -Wframe-larger-than=2200
endif

obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 4 \
      -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 6 \) \
      -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -eq 5 -a $(SUBLEVEL) -ge 2 \) \
      -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -eq 4 -a $(SUBLEVEL) -ge 9 \) \
      -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -eq 0 -a $(SUBLEVEL) -ge 41 \) ] ; then \
      echo "lttng-probe-random.o" ; fi;)

obj-$(CONFIG_LTTNG) +=  $(shell \
  if [ $(VERSION) -ge 4 \
    -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 2 \) ] ; then \
    echo "lttng-probe-rcu.o" ; fi;)

ifneq ($(CONFIG_REGMAP),)
  regmap_dep_4_1 = $(srctree)/drivers/base/regmap/trace.h
  ifneq ($(wildcard $(regmap_dep_4_1)),)
    obj-$(CONFIG_LTTNG) += lttng-probe-regmap.o
  else
    $(warning File $(regmap_dep_4_1) not found. Probe "regmap" is disabled. Need Linux 4.1+ kernel source tree to enable it.)
  endif # $(wildcard $(regmap_dep_4_1)),
endif # CONFIG_REGMAP

ifneq ($(CONFIG_PM_RUNTIME),)
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 4 \
      -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 2 \) ] ; then \
      echo "lttng-probe-rpm.o" ; fi;)
endif # CONFIG_PM_RUNTIME

ifneq ($(CONFIG_SUNRPC),)
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 4 \
      -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 4 \) ] ; then \
      echo "lttng-probe-sunrpc.o" ; fi;)
endif # CONFIG_SUNRPC

ifneq ($(CONFIG_VIDEO_V4L2),)
  obj-$(CONFIG_LTTNG) += $(shell \
    if [ $(VERSION) -ge 4 \
      -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 14 \) ] ; then \
      echo "lttng-probe-v4l2.o" ; fi;)
endif # CONFIG_VIDEO_V4L2

obj-$(CONFIG_LTTNG) += lttng-probe-workqueue.o

ifneq ($(CONFIG_KALLSYMS_ALL),)
  obj-$(CONFIG_LTTNG) +=  $(shell \
    if [ $(VERSION) -ge 3 \
      -o \( $(VERSION) -eq 2 -a $(PATCHLEVEL) -eq 6 -a $(SUBLEVEL) -ge 36 \) ] ; then \
      echo "lttng-probe-writeback.o" ; fi;)
else
  ifdef CONFIG_LOCALVERSION # Check if dot-config is included.
    $(warning CONFIG_KALLSYMS_ALL is disabled, therefore probe "writeback" is disabled. Rebuild your kernel with this configuration option enabled in order to trace this subsystem.)
  endif
endif # CONFIG_KALLSYMS_ALL

ifneq ($(CONFIG_KPROBES),)
  obj-$(CONFIG_LTTNG) += lttng-kprobes.o
endif # CONFIG_KPROBES

ifneq ($(CONFIG_KRETPROBES),)
  obj-$(CONFIG_LTTNG) += lttng-kretprobes.o
endif # CONFIG_KRETPROBES

ifneq ($(CONFIG_DYNAMIC_FTRACE),)
  obj-$(CONFIG_LTTNG) += lttng-ftrace.o
endif # CONFIG_DYNAMIC_FTRACE

# vim:syntax=make