From: Tony Ambardar <itug...@yahoo.com> dwarves is a set of tools that use the debugging information inserted in ELF binaries by compilers such as GCC. Utilities in the dwarves suite include pahole, which can be used to find alignment holes in structs and classes, and also extracts other information such as CPU cacheline alignment, helping pack those structures to achieve more cache hits.
These tools are also used to encode and read the BTF type information format used with the bpf syscall, making this a Linux build dependency when using kernel BTF information. Signed-off-by: Tony Ambardar <itug...@yahoo.com> Signed-off-by: Felix Fietkau <n...@nbd.name> [bump to 1.23] Signed-off-by: Stijn Tintel <st...@linux-ipv6.be> --- toolchain/Config.in | 8 ++++++++ tools/Makefile | 1 + tools/dwarves/Makefile | 38 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 47 insertions(+) create mode 100644 tools/dwarves/Makefile diff --git a/toolchain/Config.in b/toolchain/Config.in index 366f5c8b48..fb14006055 100644 --- a/toolchain/Config.in +++ b/toolchain/Config.in @@ -247,6 +247,14 @@ comment "Binary tools" source "toolchain/binutils/Config.in" +config DWARVES + bool + prompt "Build pahole" if TOOLCHAINOPTS + depends on !HOST_OS_MACOS + default n + help + Enable if you want to build pahole and the dwarves tools. + comment "Compiler" depends on TOOLCHAINOPTS diff --git a/tools/Makefile b/tools/Makefile index 681344a014..9eefcaf393 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -36,6 +36,7 @@ tools-$(CONFIG_TARGET_tegra) += cbootimage cbootimage-configs tools-$(CONFIG_USES_MINOR) += kernel2minor tools-$(CONFIG_USE_SPARSE) += sparse tools-$(CONFIG_USE_LLVM_BUILD) += llvm-bpf +tools-$(CONFIG_DWARVES) += dwarves # builddir dependencies $(curdir)/autoconf/compile := $(curdir)/m4/compile diff --git a/tools/dwarves/Makefile b/tools/dwarves/Makefile new file mode 100644 index 0000000000..b02a2398a1 --- /dev/null +++ b/tools/dwarves/Makefile @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: GPL-2.0-only + +include $(TOPDIR)/rules.mk + +PKG_NAME:=dwarves + +PKG_SOURCE_VERSION:=v1.23 +PKG_SOURCE_PROTO:=git +PKG_SOURCE_URL:=https://git.kernel.org/pub/scm/devel/pahole/pahole.git +PKG_MIRROR_HASH:=6ab1bb1dbdf6c73ffcf485d909229dc1da1a3d24efd213e92c56489b58d6a4bd +PKG_LICENSE:=GPL-2.0-only +PKG_LICENSE_FILES:=COPYING + +HOST_BUILD_PARALLEL:=1 + +include $(INCLUDE_DIR)/host-build.mk +include $(INCLUDE_DIR)/cmake.mk + +CMAKE_HOST_OPTIONS += \ + -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=BOTH \ + -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=BOTH \ + -DCMAKE_BUILD_TYPE=Release \ + -D__LIB=lib \ + -DCMAKE_INSTALL_RPATH="$(STAGING_DIR_HOST)/lib" \ + -DCMAKE_SKIP_RPATH=FALSE + +define Host/Clean + rm -f $(STAGING_DIR_HOST)/bin/{codiff,ctracer,dtagnames,pahole,pdwtags} + rm -f $(STAGING_DIR_HOST)/bin/{pfunct,pglobal,prefcnt,scncopy,syscse} + rm -f $(STAGING_DIR_HOST)/bin/{ostra-cg,btfdiff,fullcircle} + rm -f $(STAGING_DIR_HOST)/lib/libdwarves*.so* + rm -f $(STAGING_DIR_HOST)/share/man/man1/pahole.1 + rm -rf $(STAGING_DIR_HOST)/include/dwarves + rm -rf $(STAGING_DIR_HOST)/share/dwarves + $(call Host/Clean/Default) +endef + +$(eval $(call HostBuild)) -- 2.34.1 _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel