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https://github.com/openwrt/openwrt.git
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8f355becdf
BTF pointer data has a different size on 32 vs 64 bit targets, and while the generated eBPF code works, the BTF data fails to validate on mismatch Signed-off-by: Felix Fietkau <nbd@nbd.name>
108 lines
3.2 KiB
Makefile
108 lines
3.2 KiB
Makefile
#
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# Copyright (C) 2006-2009 OpenWrt.org
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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include $(TOPDIR)/rules.mk
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override QUILT:=
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override HOST_QUILT:=
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include $(INCLUDE_DIR)/kernel.mk
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PKG_NAME:=linux
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PKG_PATCHVER:=5.10
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PKG_VERSION:=$(PKG_PATCHVER)$(strip $(LINUX_VERSION-$(PKG_PATCHVER)))
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PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
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PKG_SOURCE_URL:=$(LINUX_SITE)
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PKG_HASH:=$(LINUX_KERNEL_HASH-$(strip $(PKG_VERSION)))
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PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/bpf-headers/$(PKG_NAME)-$(PKG_VERSION)
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GENERIC_BACKPORT_DIR := $(GENERIC_PLATFORM_DIR)/backport$(if $(wildcard $(GENERIC_PLATFORM_DIR)/backport-$(PKG_PATCHVER)),-$(PKG_PATCHVER))
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GENERIC_PATCH_DIR := $(GENERIC_PLATFORM_DIR)/pending$(if $(wildcard $(GENERIC_PLATFORM_DIR)/pending-$(PKG_PATCHVER)),-$(PKG_PATCHVER))
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GENERIC_HACK_DIR := $(GENERIC_PLATFORM_DIR)/hack$(if $(wildcard $(GENERIC_PLATFORM_DIR)/hack-$(PKG_PATCHVER)),-$(PKG_PATCHVER))
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GENERIC_FILES_DIR := $(foreach dir,$(wildcard $(GENERIC_PLATFORM_DIR)/files $(GENERIC_PLATFORM_DIR)/files-$(PKG_PATCHVER)),"$(dir)")
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PATCH_DIR := $(CURDIR)/patches
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FILES_DIR :=
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REAL_LINUX_DIR := $(LINUX_DIR)
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LINUX_DIR := $(PKG_BUILD_DIR)
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include $(INCLUDE_DIR)/bpf.mk
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include $(INCLUDE_DIR)/package.mk
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define Package/bpf-headers
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SECTION:=kernel
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CATEGORY:=Kernel
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TITLE:=eBPF kernel headers
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BUILDONLY:=1
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HIDDEN:=1
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endef
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PKG_CONFIG_PATH:=
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export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
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KERNEL_MAKE := \
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$(MAKE) -C $(PKG_BUILD_DIR) \
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ARCH=$(BPF_KARCH) \
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CROSS_COMPILE=$(BPF_ARCH)-linux- \
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LLVM=1 CC="$(CLANG)" LD="$(TARGET_CROSS)ld" \
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HOSTCC="$(HOSTCC)" \
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HOSTCXX="$(HOSTCXX)" \
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HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
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KBUILD_HOSTLDLIBS="-L$(STAGING_DIR_HOST)/lib" \
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CONFIG_SHELL="$(BASH)" \
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INSTALL_HDR_PATH="$(PKG_BUILD_DIR)/user_headers"
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define Build/Patch
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$(Kernel/Patch/Default)
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endef
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BPF_DOC = $(PKG_BUILD_DIR)/scripts/bpf_helpers_doc.py
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define Build/Configure/64
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echo 'CONFIG_CPU_MIPS64_R2=y' >> $(PKG_BUILD_DIR)/.config
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echo 'CONFIG_64BIT=y' >> $(PKG_BUILD_DIR)/.config
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endef
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define Build/Configure
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grep -vE 'CONFIG_(CPU_.*ENDIAN|HZ)' $(PKG_BUILD_DIR)/arch/mips/configs/generic_defconfig > $(PKG_BUILD_DIR)/.config
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echo 'CONFIG_CPU_$(if $(CONFIG_BIG_ENDIAN),BIG,LITTLE)_ENDIAN=y' >> $(PKG_BUILD_DIR)/.config
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$(if $(CONFIG_ARCH_64BIT),$(Build/Configure/64))
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grep CONFIG_HZ $(REAL_LINUX_DIR)/.config >> $(PKG_BUILD_DIR)/.config
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yes '' | $(KERNEL_MAKE) oldconfig
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grep 'CONFIG_HZ=' $(REAL_LINUX_DIR)/.config | \
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cut -d= -f2 | \
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bc -q $(LINUX_DIR)/kernel/time/timeconst.bc \
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> $(LINUX_DIR)/include/generated/timeconst.h
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$(BPF_DOC) --header \
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--file $(LINUX_DIR)/tools/include/uapi/linux/bpf.h \
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> $(PKG_BUILD_DIR)/tools/lib/bpf/bpf_helper_defs.h
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endef
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define Build/Compile
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$(KERNEL_MAKE) archprepare headers_install
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endef
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define Build/InstallDev
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mkdir -p $(1)/bpf-headers/arch $(1)/bpf-headers/tools
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$(CP) \
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$(PKG_BUILD_DIR)/arch/$(BPF_KARCH) \
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$(1)/bpf-headers/arch/
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$(CP) \
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$(PKG_BUILD_DIR)/tools/lib \
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$(PKG_BUILD_DIR)/tools/testing \
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$(1)/bpf-headers/tools/
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$(CP) \
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$(PKG_BUILD_DIR)/include \
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$(PKG_BUILD_DIR)/samples \
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$(PKG_BUILD_DIR)/scripts \
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$(PKG_BUILD_DIR)/user_headers \
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$(1)/bpf-headers
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endef
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$(eval $(call BuildPackage,bpf-headers))
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