Makefile 5.3 KB
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# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o

# List of programs to build
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hostprogs-y += sock_example
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hostprogs-y += fds_example
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hostprogs-y += sockex1
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hostprogs-y += sockex2
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hostprogs-y += sockex3
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hostprogs-y += tracex1
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hostprogs-y += tracex2
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hostprogs-y += tracex3
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hostprogs-y += tracex4
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hostprogs-y += tracex5
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hostprogs-y += tracex6
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hostprogs-y += test_probe_write_user
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hostprogs-y += trace_output
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hostprogs-y += lathist
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hostprogs-y += offwaketime
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hostprogs-y += spintest
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hostprogs-y += map_perf_test
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hostprogs-y += test_overhead
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hostprogs-y += test_cgrp2_array_pin
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hostprogs-y += xdp1
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hostprogs-y += xdp2
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hostprogs-y += test_current_task_under_cgroup
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hostprogs-y += trace_event
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hostprogs-y += sampleip
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hostprogs-y += tc_l2_redirect
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sock_example-objs := sock_example.o libbpf.o
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fds_example-objs := bpf_load.o libbpf.o fds_example.o
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sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
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sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
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sockex3-objs := bpf_load.o libbpf.o sockex3_user.o
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tracex1-objs := bpf_load.o libbpf.o tracex1_user.o
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tracex2-objs := bpf_load.o libbpf.o tracex2_user.o
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tracex3-objs := bpf_load.o libbpf.o tracex3_user.o
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tracex4-objs := bpf_load.o libbpf.o tracex4_user.o
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tracex5-objs := bpf_load.o libbpf.o tracex5_user.o
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tracex6-objs := bpf_load.o libbpf.o tracex6_user.o
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test_probe_write_user-objs := bpf_load.o libbpf.o test_probe_write_user_user.o
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trace_output-objs := bpf_load.o libbpf.o trace_output_user.o
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lathist-objs := bpf_load.o libbpf.o lathist_user.o
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offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o
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spintest-objs := bpf_load.o libbpf.o spintest_user.o
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map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o
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test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o
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test_cgrp2_array_pin-objs := libbpf.o test_cgrp2_array_pin.o
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xdp1-objs := bpf_load.o libbpf.o xdp1_user.o
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# reuse xdp1 source intentionally
xdp2-objs := bpf_load.o libbpf.o xdp1_user.o
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test_current_task_under_cgroup-objs := bpf_load.o libbpf.o \
				       test_current_task_under_cgroup_user.o
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trace_event-objs := bpf_load.o libbpf.o trace_event_user.o
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sampleip-objs := bpf_load.o libbpf.o sampleip_user.o
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tc_l2_redirect-objs := bpf_load.o libbpf.o tc_l2_redirect_user.o
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# Tell kbuild to always build the programs
always := $(hostprogs-y)
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always += sockex1_kern.o
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always += sockex2_kern.o
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always += sockex3_kern.o
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always += tracex1_kern.o
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always += tracex2_kern.o
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always += tracex3_kern.o
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always += tracex4_kern.o
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always += tracex5_kern.o
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always += tracex6_kern.o
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always += test_probe_write_user_kern.o
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always += trace_output_kern.o
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always += tcbpf1_kern.o
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always += tcbpf2_kern.o
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always += tc_l2_redirect_kern.o
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always += lathist_kern.o
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always += offwaketime_kern.o
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always += spintest_kern.o
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always += map_perf_test_kern.o
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always += test_overhead_tp_kern.o
always += test_overhead_kprobe_kern.o
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always += parse_varlen.o parse_simple.o parse_ldabs.o
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always += test_cgrp2_tc_kern.o
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always += xdp1_kern.o
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always += xdp2_kern.o
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always += test_current_task_under_cgroup_kern.o
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always += trace_event_kern.o
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always += sampleip_kern.o
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HOSTCFLAGS += -I$(objtree)/usr/include
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HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
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HOSTLOADLIBES_fds_example += -lelf
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HOSTLOADLIBES_sockex1 += -lelf
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HOSTLOADLIBES_sockex2 += -lelf
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HOSTLOADLIBES_sockex3 += -lelf
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HOSTLOADLIBES_tracex1 += -lelf
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HOSTLOADLIBES_tracex2 += -lelf
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HOSTLOADLIBES_tracex3 += -lelf
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HOSTLOADLIBES_tracex4 += -lelf -lrt
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HOSTLOADLIBES_tracex5 += -lelf
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HOSTLOADLIBES_tracex6 += -lelf
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HOSTLOADLIBES_test_probe_write_user += -lelf
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HOSTLOADLIBES_trace_output += -lelf -lrt
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HOSTLOADLIBES_lathist += -lelf
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HOSTLOADLIBES_offwaketime += -lelf
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HOSTLOADLIBES_spintest += -lelf
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HOSTLOADLIBES_map_perf_test += -lelf -lrt
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HOSTLOADLIBES_test_overhead += -lelf -lrt
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HOSTLOADLIBES_xdp1 += -lelf
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HOSTLOADLIBES_xdp2 += -lelf
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HOSTLOADLIBES_test_current_task_under_cgroup += -lelf
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HOSTLOADLIBES_trace_event += -lelf
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HOSTLOADLIBES_sampleip += -lelf
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HOSTLOADLIBES_tc_l2_redirect += -l elf
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# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
#  make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
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LLC ?= llc
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CLANG ?= clang
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# Trick to allow make to be run from this directory
all:
	$(MAKE) -C ../../ $$PWD/

clean:
	$(MAKE) -C ../../ M=$$PWD clean
	@rm -f *~

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# Verify LLVM compiler tools are available and bpf target is supported by llc
.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
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verify_cmds: $(CLANG) $(LLC)
	@for TOOL in $^ ; do \
		if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
			echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
			exit 1; \
		else true; fi; \
	done
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verify_target_bpf: verify_cmds
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	@if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
		echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
		echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
		exit 2; \
	else true; fi

$(src)/*.c: verify_target_bpf

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# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
# But, there is no easy way to fix it, so just exclude it since it is
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# useless for BPF samples.
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$(obj)/%.o: $(src)/%.c
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	$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
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		-D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
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		-Wno-compare-distinct-pointer-types \
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		-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@