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[2620:137:e000::1:20]) by mx.google.com with ESMTP id z1-20020a1709028f8100b001967f72c227si16625250plo.390.2023.02.08.09.34.02; Wed, 08 Feb 2023 09:34:14 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b="WoCH/mSd"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229462AbjBHRYW (ORCPT + 99 others); Wed, 8 Feb 2023 12:24:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55438 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231764AbjBHRYJ (ORCPT ); Wed, 8 Feb 2023 12:24:09 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EDCFB2594D for ; Wed, 8 Feb 2023 09:23:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=eoiAli19PL7azkr1hXVTcWX6t95Td6qRB+S8kh8zJlQ=; b=WoCH/mSdUyVDacdymT8eL3e5cC DeZUvZFrS2QMu86mrs8CClkmBdCDkEN6fNNLRePzh+/AUjxnwJo2pRcsvxQVlCplDhHz4rRIAdZxG FPQeY76QW/e3AGZwZGsLQob14d7zQPMpCF3yHgHdsXHwyf8Hhb45iA80/joAykRdWNOB/FT4xuk3a 5yO/zVqy0yd8a4ncKDeJ8vu+aE94Koty8uMs9Glt373GPTDHuuVYn+B1+KSajuvg4P09Yh3LFZ4t0 l1e/CveedMAAqeScctLnFkrtfKcnO3pQWdkEVWDj/VDDPwXAdKaA5114EbkDYiUQLOGShVBTJfJCb 5zNYvE8w==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pPoAh-001PYA-HO; Wed, 08 Feb 2023 17:23:52 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 505683021F5; Wed, 8 Feb 2023 18:23:50 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 2C0E823D8CFB8; Wed, 8 Feb 2023 18:23:50 +0100 (CET) Message-ID: <20230208172245.922980544@infradead.org> User-Agent: quilt/0.66 Date: Wed, 08 Feb 2023 18:18:06 +0100 From: Peter Zijlstra To: x86@kernel.org, jpoimboe@redhat.com, linux@weissschuh.net Cc: linux-kernel@vger.kernel.org, peterz@infradead.org Subject: [PATCH 10/10][HACK] objtool: Shrink reloc References: <20230208171756.898991570@infradead.org> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1757285087081792496?= X-GMAIL-MSGID: =?utf-8?q?1757285087081792496?= Glorious hack, do not merge. Good for another ~850M of allyesconfig savings. Signed-off-by: Peter Zijlstra (Intel) --- tools/objtool/include/objtool/elf.h | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) --- a/tools/objtool/include/objtool/elf.h +++ b/tools/objtool/include/objtool/elf.h @@ -71,17 +71,23 @@ struct reloc { union { GElf_Rela rela; GElf_Rel rel; + struct { + u64 offset; + u64 __bar; + s64 addend; + }; }; struct section *sec; struct symbol *sym; struct list_head sym_reloc_entry; - unsigned long offset; - unsigned int type; - s64 addend; int idx; + unsigned short type; bool jump_table_start; }; +static_assert(offsetof(struct reloc, rela.r_offset) == offsetof(struct reloc, offset)); +static_assert(offsetof(struct reloc, rela.r_addend) == offsetof(struct reloc, addend)); + #define ELF_HASH_BITS 20 struct elf {