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122 lines
3.1 KiB
Makefile
122 lines
3.1 KiB
Makefile
#
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# Copyright (C) 2015-2024 OpenWrt.org
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#
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# This is free software, licensed under the GNU General Public License v3.
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#
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include $(TOPDIR)/rules.mk
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include $(INCLUDE_DIR)/kernel.mk
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PKG_NAME:=vmlinux-btf
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PKG_VERSION:=$(LINUX_VERSION)
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PKG_RELEASE:=6
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include $(INCLUDE_DIR)/package.mk
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PKG_BUILD_PARALLEL:=1
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define Package/vmlinux-btf
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SECTION:=kernel
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CATEGORY:=Kernel
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TITLE:=Kernel vmlinux.btf for CO-RE compatibility
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endef
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define Package/vmlinux-btf/description
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Supplies kernel BTF information to ensure CO-RE eBPF compatibility.
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This package builds a shadow kernel tree using the OpenWrt kernel source,
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applies the same patches/files, and generates detached BTF information
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without modifying the main kernel build directory.
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endef
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define Package/vmlinux-btf/postinst
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#!/bin/sh
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if [ -z "$${IPKG_INSTROOT}" ]; then
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ln -sf /usr/lib/debug/boot/vmlinux /usr/lib/debug/boot/vmlinux-$$(uname -r)
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fi
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endef
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define Package/vmlinux-btf/prerm
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#!/bin/sh
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if [ -z "$${IPKG_INSTROOT}" ]; then
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rm -f /usr/lib/debug/boot/vmlinux-$$(uname -r)
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fi
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endef
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PAHOLE_JOBS := $(if $(filter -j%,$(PKG_JOBS)),$(patsubst -j%,%,$(filter -j%,$(PKG_JOBS))),1)
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define Build/Prepare
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mkdir -p $(PKG_BUILD_DIR)
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$(TAR) -C $(PKG_BUILD_DIR) -xf $(DL_DIR)/$(LINUX_SOURCE)
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mv $(PKG_BUILD_DIR)/linux-$(LINUX_VERSION) $(PKG_BUILD_DIR)/shadow-kernel
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cp $(LINUX_DIR)/.config $(PKG_BUILD_DIR)/shadow-kernel/.config
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endef
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define Build/Compile
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$(PKG_BUILD_DIR)/shadow-kernel/scripts/config \
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--file $(PKG_BUILD_DIR)/shadow-kernel/.config \
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--disable WERROR \
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--enable CGROUPS \
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--enable CGROUP_BPF \
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--enable SOCK_CGROUP_DATA \
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--enable KALLSYMS \
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--enable PERF_EVENTS \
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--enable TRACEPOINTS \
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--enable KPROBES \
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--enable UPROBES \
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--enable BPF \
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--enable BPF_SYSCALL \
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--enable BPF_JIT \
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--enable BPF_JIT_DEFAULT_ON \
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--enable INET \
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--enable NET_INGRESS \
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--enable NET_EGRESS \
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--enable BPF_STREAM_PARSER \
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--enable XDP_SOCKETS \
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--enable NET_SCHED \
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--enable NET_SCH_INGRESS \
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--enable NET_CLS \
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--enable NET_CLS_ACT \
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--enable KPROBE_EVENTS \
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--enable UPROBE_EVENTS \
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--enable BPF_EVENTS \
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--enable DEBUG_KERNEL \
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--enable DEBUG_INFO \
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--disable DEBUG_INFO_NONE \
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--enable DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT \
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--disable DEBUG_INFO_REDUCED \
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--disable DEBUG_INFO_SPLIT \
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--enable DEBUG_INFO_BTF \
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--set-str EXTRA_FIRMWARE "" \
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--set-str INITRAMFS_SOURCE ""
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$(MAKE) -C $(PKG_BUILD_DIR)/shadow-kernel \
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$(KERNEL_MAKE_FLAGS) \
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KBUILD_HOSTLDFLAGS="$(KBUILD_HOSTLDFLAGS) -lz" \
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olddefconfig
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$(MAKE) -C $(PKG_BUILD_DIR)/shadow-kernel \
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$(KERNEL_MAKE_FLAGS) \
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$(PKG_JOBS) \
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KBUILD_HOSTLDFLAGS="-L$(STAGING_DIR_HOST)/lib -lz" \
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vmlinux
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pahole \
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--jobs=$(PAHOLE_JOBS) \
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--btf_encode_detached=$(PKG_BUILD_DIR)/vmlinux-btf \
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$(PKG_BUILD_DIR)/shadow-kernel/vmlinux
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endef
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define Build/Clean
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rm -rf $(PKG_BUILD_DIR)
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endef
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define Package/vmlinux-btf/install
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$(INSTALL_DIR) $(1)/usr/lib/debug/boot
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$(INSTALL_DATA) $(PKG_BUILD_DIR)/vmlinux-btf $(1)/usr/lib/debug/boot/vmlinux
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$(LN) vmlinux $(1)/usr/lib/debug/boot/vmlinux-$(LINUX_VERSION)
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endef
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$(eval $(call BuildPackage,vmlinux-btf))
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