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# SPDX-License-Identifier: GPL-2.0
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LIBDIR := ../../../lib
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BPFDIR := $(LIBDIR)/bpf
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APIDIR := ../../../include/uapi
GENDIR := ../../../../include/generated
GENHDR := $(GENDIR)/autoconf.h
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ifneq ($(wildcard $(GENHDR)),)
  GENFLAGS := -DHAVE_GENHDR
endif

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CFLAGS += -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(BPFDIR) -I$(GENDIR) $(GENFLAGS) -I../../../include
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LDLIBS += -lcap -lelf -lrt -lpthread
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TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
all: $(TEST_CUSTOM_PROGS)

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$(TEST_CUSTOM_PROGS): $(OUTPUT)/%: %.c
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	$(CC) -o $(TEST_CUSTOM_PROGS) -static $< -Wl,--build-id
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# Order correspond to 'make run_tests' order
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TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
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	test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
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	test_sock test_btf test_sockmap test_lirc_mode2_user get_cgroup_id_user \
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	test_socket_cookie test_cgroup_storage test_select_reuseport
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TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o \
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	test_pkt_md_access.o test_xdp_redirect.o test_xdp_meta.o sockmap_parse_prog.o     \
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	sockmap_verdict_prog.o dev_cgroup.o sample_ret0.o test_tracepoint.o \
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	test_l4lb_noinline.o test_xdp_noinline.o test_stacktrace_map.o \
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	sample_map_ret0.o test_tcpbpf_kern.o test_stacktrace_build_id.o \
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	sockmap_tcp_msg_prog.o connect4_prog.o connect6_prog.o test_adjust_tail.o \
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	test_btf_haskv.o test_btf_nokv.o test_sockmap_kern.o test_tunnel_kern.o \
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	test_get_stack_rawtp.o test_sockmap_kern.o test_sockhash_kern.o \
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	test_lwt_seg6local.o sendmsg4_prog.o sendmsg6_prog.o test_lirc_mode2_kern.o \
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	get_cgroup_id_kern.o socket_cookie_prog.o test_select_reuseport_kern.o \
	test_skb_cgroup_id_kern.o
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# Order correspond to 'make run_tests' order
TEST_PROGS := test_kmod.sh \
	test_libbpf.sh \
	test_xdp_redirect.sh \
	test_xdp_meta.sh \
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	test_offload.py \
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	test_sock_addr.sh \
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	test_tunnel.sh \
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	test_lwt_seg6local.sh \
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	test_lirc_mode2.sh \
	test_skb_cgroup_id.sh
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# Compile but not part of 'make run_tests'
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TEST_GEN_PROGS_EXTENDED = test_libbpf_open test_sock_addr test_skb_cgroup_id_user
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include ../lib.mk

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BPFOBJ := $(OUTPUT)/libbpf.a
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$(TEST_GEN_PROGS): $(BPFOBJ)
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$(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/libbpf.a

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$(OUTPUT)/test_dev_cgroup: cgroup_helpers.c
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$(OUTPUT)/test_skb_cgroup_id_user: cgroup_helpers.c
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$(OUTPUT)/test_sock: cgroup_helpers.c
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$(OUTPUT)/test_sock_addr: cgroup_helpers.c
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$(OUTPUT)/test_socket_cookie: cgroup_helpers.c
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$(OUTPUT)/test_sockmap: cgroup_helpers.c
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$(OUTPUT)/test_tcpbpf_user: cgroup_helpers.c
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$(OUTPUT)/test_progs: trace_helpers.c
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$(OUTPUT)/get_cgroup_id_user: cgroup_helpers.c
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$(OUTPUT)/test_cgroup_storage: cgroup_helpers.c
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.PHONY: force
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# force a rebuild of BPFOBJ when its dependencies are updated
force:

$(BPFOBJ): force
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	$(MAKE) -C $(BPFDIR) OUTPUT=$(OUTPUT)/
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CLANG ?= clang
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LLC   ?= llc
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LLVM_OBJCOPY ?= llvm-objcopy
BTF_PAHOLE ?= pahole
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PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
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# Let newer LLVM versions transparently probe the kernel for availability
# of full BPF instruction set.
ifeq ($(PROBE),)
  CPU ?= probe
else
  CPU ?= generic
endif
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# Get Clang's default includes on this system, as opposed to those seen by
# '-target bpf'. This fixes "missing" files on some architectures/distros,
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
#
# Use '-idirafter': Don't interfere with include mechanics except where the
# build would have failed anyways.
CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \
	| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')

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CLANG_FLAGS = -I. -I./include/uapi -I../../../include/uapi \
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	      $(CLANG_SYS_INCLUDES) \
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	      -Wno-compare-distinct-pointer-types

$(OUTPUT)/test_l4lb_noinline.o: CLANG_FLAGS += -fno-inline
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$(OUTPUT)/test_xdp_noinline.o: CLANG_FLAGS += -fno-inline
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BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
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BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
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ifneq ($(BTF_LLC_PROBE),)
ifneq ($(BTF_PAHOLE_PROBE),)
ifneq ($(BTF_OBJCOPY_PROBE),)
	CLANG_FLAGS += -g
	LLC_FLAGS += -mattr=dwarfris
	DWARF2BTF = y
endif
endif
endif

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# Have one program compiled without "-target bpf" to test whether libbpf loads
# it successfully
$(OUTPUT)/test_xdp.o: test_xdp.c
	$(CLANG) $(CLANG_FLAGS) \
		-O2 -emit-llvm -c $< -o - | \
	$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
ifeq ($(DWARF2BTF),y)
	$(BTF_PAHOLE) -J $@
endif

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$(OUTPUT)/%.o: %.c
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	$(CLANG) $(CLANG_FLAGS) \
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		 -O2 -target bpf -emit-llvm -c $< -o - |      \
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	$(LLC) -march=bpf -mcpu=$(CPU) $(LLC_FLAGS) -filetype=obj -o $@
ifeq ($(DWARF2BTF),y)
	$(BTF_PAHOLE) -J $@
endif
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EXTRA_CLEAN := $(TEST_CUSTOM_PROGS)