From patchwork Tue Jun 16 10:05:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiri Olsa X-Patchwork-Id: 217719 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.1 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4F2CC433E1 for ; Tue, 16 Jun 2020 10:05:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DF7520734 for ; Tue, 16 Jun 2020 10:05:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592301939; bh=2C7Uc9uVWFtK0tSjDTSUSqLwwkPzsQ/UQ+F4UE4oujo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=GWw/3lz7yuWbwbNyU4gueSe01IT0Tr2Z7yxYQNbEobWAGkmDHRD7JJxaC7p6J7ul5 qfvL4OR726H6Pp4tIiWPpOq27e22nVNWOjmvATO8eh7CqyMpkRpaX4F4Omq5p2yduX xfGkchY6HVj8MkPE7GRmFnCeCoxBaTq9Dwlfrhnc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728274AbgFPKFi convert rfc822-to-8bit (ORCPT ); Tue, 16 Jun 2020 06:05:38 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:46345 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726261AbgFPKFf (ORCPT ); Tue, 16 Jun 2020 06:05:35 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-146-pjeXWtzxNaaRByx-W77-7A-1; Tue, 16 Jun 2020 06:05:32 -0400 X-MC-Unique: pjeXWtzxNaaRByx-W77-7A-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E3669193F587; Tue, 16 Jun 2020 10:05:29 +0000 (UTC) Received: from krava.redhat.com (unknown [10.40.195.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id 42F3E5D9DD; Tue, 16 Jun 2020 10:05:23 +0000 (UTC) From: Jiri Olsa To: Alexei Starovoitov , Daniel Borkmann Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, Song Liu , Yonghong Song , Martin KaFai Lau , David Miller , John Fastabend , Wenbo Zhang , KP Singh , Andrii Nakryiko , Brendan Gregg , Florent Revest , Al Viro Subject: [PATCH 02/11] bpf: Compile btfid tool at kernel compilation start Date: Tue, 16 Jun 2020 12:05:03 +0200 Message-Id: <20200616100512.2168860-3-jolsa@kernel.org> In-Reply-To: <20200616100512.2168860-1-jolsa@kernel.org> References: <20200616100512.2168860-1-jolsa@kernel.org> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: kernel.org Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The btfid tool will be used during the vmlinux linking, so it's necessary it's ready for it. Signed-off-by: Jiri Olsa --- Makefile | 22 ++++++++++++++++++---- tools/Makefile | 3 +++ tools/bpf/Makefile | 5 ++++- 3 files changed, 25 insertions(+), 5 deletions(-) diff --git a/Makefile b/Makefile index 839f9fee22cb..b190d502d7d7 100644 --- a/Makefile +++ b/Makefile @@ -1066,9 +1066,10 @@ export mod_sign_cmd HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) +has_libelf = $(call try-run,\ + echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) + ifdef CONFIG_STACK_VALIDATION - has_libelf := $(call try-run,\ - echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) ifeq ($(has_libelf),1) objtool_target := tools/objtool FORCE else @@ -1077,6 +1078,14 @@ ifdef CONFIG_STACK_VALIDATION endif endif +ifdef CONFIG_DEBUG_INFO_BTF + ifeq ($(has_libelf),1) + btfid_target := tools/bpf/btfid FORCE + else + ERROR_BTF_IDS_RESOLVE := 1 + endif +endif + PHONY += prepare0 export MODORDER := $(extmod-prefix)modules.order @@ -1188,7 +1197,7 @@ prepare0: archprepare $(Q)$(MAKE) $(build)=. # All the preparing.. -prepare: prepare0 prepare-objtool +prepare: prepare0 prepare-objtool prepare-btfid # Support for using generic headers in asm-generic asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj @@ -1201,7 +1210,7 @@ uapi-asm-generic: $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ generic=include/uapi/asm-generic -PHONY += prepare-objtool +PHONY += prepare-objtool prepare-btfid prepare-objtool: $(objtool_target) ifeq ($(SKIP_STACK_VALIDATION),1) ifdef CONFIG_UNWINDER_ORC @@ -1212,6 +1221,11 @@ else endif endif +prepare-btfid: $(btfid_target) +ifeq ($(ERROR_BTF_IDS_RESOLVE),1) + @echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 + @false +endif # Generate some files # --------------------------------------------------------------------------- diff --git a/tools/Makefile b/tools/Makefile index bd778812e915..85af6ebbce91 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -67,6 +67,9 @@ cpupower: FORCE cgroup firewire hv guest bootconfig spi usb virtio vm bpf iio gpio objtool leds wmi pci firmware debugging: FORCE $(call descend,$@) +bpf/%: FORCE + $(call descend,$@) + liblockdep: FORCE $(call descend,lib/lockdep) diff --git a/tools/bpf/Makefile b/tools/bpf/Makefile index 77472e28c8fd..d8bbe7ef264f 100644 --- a/tools/bpf/Makefile +++ b/tools/bpf/Makefile @@ -124,5 +124,8 @@ runqslower_install: runqslower_clean: $(call descend,runqslower,clean) +btfid: + $(call descend,btfid) + .PHONY: all install clean bpftool bpftool_install bpftool_clean \ - runqslower runqslower_install runqslower_clean + runqslower runqslower_install runqslower_clean btfid