111 lines
3.6 KiB
Makefile
111 lines
3.6 KiB
Makefile
# The development version of clang is distributed as the 'clang' binary,
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# while stable/released versions have a version number attached.
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# Pin the default clang to a stable version.
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CLANG ?= clang-14
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STRIP ?= llvm-strip-14
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OBJCOPY ?= llvm-objcopy-14
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CFLAGS := -O2 -g -Wall -Werror $(CFLAGS)
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CI_KERNEL_URL ?= https://github.com/cilium/ci-kernels/raw/master/
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# Obtain an absolute path to the directory of the Makefile.
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# Assume the Makefile is in the root of the repository.
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REPODIR := $(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))
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UIDGID := $(shell stat -c '%u:%g' ${REPODIR})
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# Prefer podman if installed, otherwise use docker.
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# Note: Setting the var at runtime will always override.
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CONTAINER_ENGINE ?= $(if $(shell command -v podman), podman, docker)
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CONTAINER_RUN_ARGS ?= $(if $(filter ${CONTAINER_ENGINE}, podman), --log-driver=none, --user "${UIDGID}")
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IMAGE := $(shell cat ${REPODIR}/testdata/docker/IMAGE)
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VERSION := $(shell cat ${REPODIR}/testdata/docker/VERSION)
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# clang <8 doesn't tag relocs properly (STT_NOTYPE)
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# clang 9 is the first version emitting BTF
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TARGETS := \
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testdata/loader-clang-7 \
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testdata/loader-clang-9 \
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testdata/loader-$(CLANG) \
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testdata/btf_map_init \
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testdata/invalid_map \
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testdata/raw_tracepoint \
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testdata/invalid_map_static \
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testdata/invalid_btf_map_init \
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testdata/strings \
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testdata/freplace \
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testdata/iproute2_map_compat \
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testdata/map_spin_lock \
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testdata/subprog_reloc \
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testdata/fwd_decl \
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btf/testdata/relocs \
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btf/testdata/relocs_read \
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btf/testdata/relocs_read_tgt
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.PHONY: all clean container-all container-shell generate
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.DEFAULT_TARGET = container-all
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# Build all ELF binaries using a containerized LLVM toolchain.
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container-all:
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${CONTAINER_ENGINE} run --rm ${CONTAINER_RUN_ARGS} \
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-v "${REPODIR}":/ebpf -w /ebpf --env MAKEFLAGS \
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--env CFLAGS="-fdebug-prefix-map=/ebpf=." \
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--env HOME="/tmp" \
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"${IMAGE}:${VERSION}" \
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$(MAKE) all
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# (debug) Drop the user into a shell inside the container as root.
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container-shell:
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${CONTAINER_ENGINE} run --rm -ti \
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-v "${REPODIR}":/ebpf -w /ebpf \
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"${IMAGE}:${VERSION}"
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clean:
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-$(RM) testdata/*.elf
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-$(RM) btf/testdata/*.elf
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format:
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find . -type f -name "*.c" | xargs clang-format -i
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all: format $(addsuffix -el.elf,$(TARGETS)) $(addsuffix -eb.elf,$(TARGETS)) generate
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ln -srf testdata/loader-$(CLANG)-el.elf testdata/loader-el.elf
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ln -srf testdata/loader-$(CLANG)-eb.elf testdata/loader-eb.elf
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# $BPF_CLANG is used in go:generate invocations.
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generate: export BPF_CLANG := $(CLANG)
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generate: export BPF_CFLAGS := $(CFLAGS)
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generate:
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go generate ./cmd/bpf2go/test
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go generate ./internal/sys
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cd examples/ && go generate ./...
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testdata/loader-%-el.elf: testdata/loader.c
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$* $(CFLAGS) -target bpfel -c $< -o $@
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$(STRIP) -g $@
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testdata/loader-%-eb.elf: testdata/loader.c
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$* $(CFLAGS) -target bpfeb -c $< -o $@
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$(STRIP) -g $@
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%-el.elf: %.c
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$(CLANG) $(CFLAGS) -target bpfel -c $< -o $@
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$(STRIP) -g $@
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%-eb.elf : %.c
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$(CLANG) $(CFLAGS) -target bpfeb -c $< -o $@
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$(STRIP) -g $@
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.PHONY: generate-btf
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generate-btf: KERNEL_VERSION?=5.18
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generate-btf:
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$(eval TMP := $(shell mktemp -d))
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curl -fL "$(CI_KERNEL_URL)/linux-$(KERNEL_VERSION).bz" -o "$(TMP)/bzImage"
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./testdata/extract-vmlinux "$(TMP)/bzImage" > "$(TMP)/vmlinux"
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$(OBJCOPY) --dump-section .BTF=/dev/stdout "$(TMP)/vmlinux" /dev/null | gzip > "btf/testdata/vmlinux.btf.gz"
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curl -fL "$(CI_KERNEL_URL)/linux-$(KERNEL_VERSION)-selftests-bpf.tgz" -o "$(TMP)/selftests.tgz"
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tar -xf "$(TMP)/selftests.tgz" --to-stdout tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.ko | \
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$(OBJCOPY) --dump-section .BTF="btf/testdata/btf_testmod.btf" - /dev/null
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$(RM) -r "$(TMP)"
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