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[2620:52:3:1:0:246e:9693:128c]) by mx.google.com with ESMTPS id s11-20020a170906a18b00b007adf6f0f962si920919ejy.291.2022.11.17.09.44.22 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Nov 2022 09:44:22 -0800 (PST) Received-SPF: pass (google.com: domain of binutils-bounces+ouuuleilei=gmail.com@sourceware.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) client-ip=2620:52:3:1:0:246e:9693:128c; Authentication-Results: mx.google.com; dkim=pass header.i=@sourceware.org header.s=default header.b=t29kcLmq; spf=pass (google.com: domain of binutils-bounces+ouuuleilei=gmail.com@sourceware.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="binutils-bounces+ouuuleilei=gmail.com@sourceware.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 76449385456D for ; Thu, 17 Nov 2022 17:44:21 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 76449385456D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1668707061; bh=QP8wTiQ4PAZZ50JVdNheHWrddcUSmmODFGvV4Rr4AiU=; h=Date:Subject:To:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=t29kcLmqRhvcCKL4EISa8J7ouAtk6cKa4A/JapaHA4uunUJ4wltqK3h2ACh1/1MBu wmXyuU1hy0rOrORLMN9BALzEI9b1GRKQJwlXaZj7RwlpBKyD4c4MWzRT4SzBtvoqPR cwtc6vYjQfp8/vYhJW3DkSkL523qhkd69343rqFU= X-Original-To: binutils@sourceware.org Delivered-To: binutils@sourceware.org Received: from mail-ej1-x631.google.com (mail-ej1-x631.google.com [IPv6:2a00:1450:4864:20::631]) by sourceware.org (Postfix) with ESMTPS id A10413854555 for ; Thu, 17 Nov 2022 17:44:12 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org A10413854555 Received: by mail-ej1-x631.google.com with SMTP id n12so6857301eja.11 for ; Thu, 17 Nov 2022 09:44:12 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=QP8wTiQ4PAZZ50JVdNheHWrddcUSmmODFGvV4Rr4AiU=; b=DGnMPz8bOsuk8bI7fuvhm6bLHiEkiZP+uRyQLE/G6/CM3twZFFpPcqGZkgvYBVM3Qy e6TIGZvcrcq9yUqv5nuyAMEAhTI7drl1DA4+2kOnjbn50oUcs7SeXeP7qeWSNNb1pjPU tqyY8pf7t/i1KV5FFfD1hvTLpD2wWMfH2m0lCWNz8qEqRjp1MchgyMC5SWokZ1HX/NJm ZAQ0+i15CYA3Y9+OYwAj9UJYBQ83zSEraNo7gAvpt7xdMCNOT5Gb4907ft3K5lg6riXQ dDsXl3lELe9uPH+kUarNGTCX/80Cu9EvdpcDS2sqrqg58YWGD9Dyh5EtcC/k/jy1k1dR aFsA== X-Gm-Message-State: ANoB5pn2JqN0MaXrmc311jpaMrRxLGtleo/4mht91u060bYCe5Okh3zc YvEg8LKO6yHJLBQAobzstThYmRNhD0JlQw2GAVvw/F5kmCI= X-Received: by 2002:a17:907:904f:b0:78d:85fe:4951 with SMTP id az15-20020a170907904f00b0078d85fe4951mr2927324ejc.593.1668707051291; Thu, 17 Nov 2022 09:44:11 -0800 (PST) MIME-Version: 1.0 Date: Fri, 18 Nov 2022 01:44:00 +0800 Message-ID: Subject: [PATCH] binutils: partially revert 17c6c3b99156fe82c1e637e1a5fd9f163ac788c8 To: binutils@sourceware.org X-Spam-Status: No, score=-9.9 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, KAM_NUMSUBJECT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: binutils@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Binutils mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: =?utf-8?b?5b6Q5oyB5oGSIFh1IENoaWhlbmcgdmlhIEJpbnV0aWxz?= From: =?utf-8?b?5b6Q5oyB5oGSIFh1IENoaWhlbmc=?= Reply-To: =?utf-8?b?5b6Q5oyB5oGSIFh1IENoaWhlbmc=?= Errors-To: binutils-bounces+ouuuleilei=gmail.com@sourceware.org Sender: "Binutils" X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749766176953383736?= X-GMAIL-MSGID: =?utf-8?q?1749766176953383736?= Phenomenal: In 32 bit and 64 bit mixed code, ld can't do relocation for 32 bit code. It is caused by commit 17c6c3b99156fe82c1e637e1a5fd9f163ac788c8. /* src_mask selects the part of the instruction (or data) to be used in the relocation sum. If the target relocations don't have an addend in the reloc, eg. ELF USE_REL, src_mask will normally equal dst_mask to extract the addend from the section contents. If relocations do have an addend in the reloc, eg. ELF USE_RELA, this field should normally be zero. Non-zero values for ELF USE_RELA targets should be viewed with suspicion as normally the value in the dst_mask part of the section contents should be ignored. */ bfd_vma src_mask; Author: Jan Beulich 2021-05-07 18:05:12 Committer: Jan Beulich 2021-05-07 18:05:12 Parent: 98da05bf2698b55b73453480a3fbb92f163d2c7b (x86: don't mix disp and imm processing) Child: 4cf88725da1cb503be04d3237354105ec170bc86 ([gdb/symtab] Fix infinite recursion in dwarf2_cu::get_builder()) Branches: master, test0558-01 and many more (41) Follows: gdb-10-branchpoint Precedes: binutils-2_37, gdb-11-branchpoint x86-64/ELF: clear src_mask for all reloc types x86-64 uses rela relocations. The comment next to the field's declaration says "Non-zero values for ELF USE_RELA targets should be viewed with suspicion ..." And indeed the fields being non-zero causes section contents to be accumulated into the final relocated values in addition to the relocations' addends, which is contrary to the ELF spec. bfd/elf64-x86-64.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c index 2ae8dffba0f..27be6a6f0ba 100644 --- a/bfd/elf64-x86-64.c +++ b/bfd/elf64-x86-64.c @@ -50,13 +50,13 @@ static reloc_howto_type x86_64_elf_howto_table[] = bfd_elf_generic_reloc, "R_X86_64_64", false, 0, MINUS_ONE, false), HOWTO(R_X86_64_PC32, 0, 4, 32, true, 0, complain_overflow_signed, - bfd_elf_generic_reloc, "R_X86_64_PC32", false, 0, 0xffffffff, + bfd_elf_generic_reloc, "R_X86_64_PC32", false, 0xffffffff, 0xffffffff, true), HOWTO(R_X86_64_GOT32, 0, 4, 32, false, 0, complain_overflow_signed, - bfd_elf_generic_reloc, "R_X86_64_GOT32", false, 0, 0xffffffff, + bfd_elf_generic_reloc, "R_X86_64_GOT32", false, 0xffffffff, 0xffffffff, false), HOWTO(R_X86_64_PLT32, 0, 4, 32, true, 0, complain_overflow_signed, - bfd_elf_generic_reloc, "R_X86_64_PLT32", false, 0, 0xffffffff, + bfd_elf_generic_reloc, "R_X86_64_PLT32", false, 0xffffffff, 0xffffffff, true), HOWTO(R_X86_64_COPY, 0, 4, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_X86_64_COPY", false, 0, 0xffffffff, @@ -74,10 +74,10 @@ static reloc_howto_type x86_64_elf_howto_table[] = bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", false, 0, 0xffffffff, true), HOWTO(R_X86_64_32, 0, 4, 32, false, 0, complain_overflow_unsigned, - bfd_elf_generic_reloc, "R_X86_64_32", false, 0, 0xffffffff, + bfd_elf_generic_reloc, "R_X86_64_32", false, 0xffffffff, 0xffffffff, false), HOWTO(R_X86_64_32S, 0, 4, 32, false, 0, complain_overflow_signed, - bfd_elf_generic_reloc, "R_X86_64_32S", false, 0, 0xffffffff, + bfd_elf_generic_reloc, "R_X86_64_32S", false, 0xffffffff, 0xffffffff, false), HOWTO(R_X86_64_16, 0, 2, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_X86_64_16", false, 0, 0xffff, false), @@ -136,7 +136,7 @@ static reloc_howto_type x86_64_elf_howto_table[] = bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", false, 0, MINUS_ONE, false), HOWTO(R_X86_64_SIZE32, 0, 4, 32, false, 0, complain_overflow_unsigned, - bfd_elf_generic_reloc, "R_X86_64_SIZE32", false, 0, 0xffffffff, + bfd_elf_generic_reloc, "R_X86_64_SIZE32", false, 0xffffffff, 0xffffffff, false), HOWTO(R_X86_64_SIZE64, 0, 8, 64, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_X86_64_SIZE64", false, 0, MINUS_ONE, @@ -188,7 +188,7 @@ static reloc_howto_type x86_64_elf_howto_table[] = /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */ HOWTO(R_X86_64_32, 0, 4, 32, false, 0, complain_overflow_bitfield, - bfd_elf_generic_reloc, "R_X86_64_32", false, 0, 0xffffffff, + bfd_elf_generic_reloc, "R_X86_64_32", false, 0xffffffff, 0xffffffff, false) };