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Gentoo's Bugzilla – Attachment 526348 Details for
Bug 639976
net-libs/libpcap-1.8.1 with sys-devel/binutils-2.29.1 miscompiles on sparc
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[patch]
original patch from mailing list
sparc-zero.got.patch (text/plain), 6.17 KB, created by
Rolf Eike Beer
on 2018-04-02 16:46:02 UTC
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Description:
original patch from mailing list
Filename:
MIME Type:
Creator:
Rolf Eike Beer
Created:
2018-04-02 16:46:02 UTC
Size:
6.17 KB
patch
obsolete
>From amodra@gmail.com Fri Dec 08 01:19:38 2017 >Return-path: <amodra@gmail.com> >Envelope-to: eb@emlix.com >Received: by mailer.emlix.com > id 1eN7Lj-0001ix-6o; Fri, 08 Dec 2017 02:21:11 +0100 >Received: from mx1.emlix.com ([46.4.235.150]:41002) > by gate.emlix.com with esmtps (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) > (Exim 4.82_1-5b7a7c0-XX) > (envelope-from <amodra@gmail.com>) > id 1eN7KL-0007e3-2b > for eb@emlix.com; Fri, 08 Dec 2017 02:19:46 +0100 >X-CTCH-RefID: str=0001.0A090204.5A29E8B2.003B,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 >Received-SPF: pass (gmail.com ... _spf.google.com: Sender is authorized to use 'amodra@gmail.com' in 'mfrom' identity (mechanism 'include:_netblocks.google.com' matched)) receiver=mx1.emlix.com; identity=mailfrom; envelope-from="amodra@gmail.com"; helo=mail-pf0-f176.google.com; client-ip=209.85.192.176 >Received: from mail-pf0-f176.google.com (mail-pf0-f176.google.com [209.85.192.176]) > (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) > (No client certificate requested) > by mx1.emlix.com (Postfix) with ESMTPS id 4CF9825F21C > for <eb@emlix.com>; Fri, 8 Dec 2017 02:19:45 +0100 (CET) >Received: by mail-pf0-f176.google.com with SMTP id u25so6043493pfg.5 > for <eb@emlix.com>; Thu, 07 Dec 2017 17:19:44 -0800 (PST) >DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; > d=gmail.com; s=20161025; > h=date:from:to:cc:subject:message-id:references:mime-version > :content-disposition:in-reply-to:user-agent; > bh=PBSyJWqX0xWOvHCkBs8Ihevl7ryqoqCycatAt5mY+jk=; > b=GDR7/YXBZm00Eo5Pv2IskXG7LWCu+4MU82lOKbKFXHD08Vjm6QVCsjNXQV7Rv/o8se > zzr5bqlWYZzTxD0MI/FuDSc4IhW+Xbn40nJb9MRdMrCUbTngdxp93tCLMxjzyD7y1tt0 > 9pytMOzqBvVJQ+Bi1WNJVOAOxUeUeUDXTIcVZ4pyR+CWNqG0oQOLnALto9OMyoaYB2Ib > 7mlIoj/t/somzc02WVjeWwxYIfd8dioIch9rV2AqYezVumtCte+TNVWMqt5Ohv5Mx5I5 > krx0O6odZurKyrqr2Rk9YkEK7wSRlwqeVUQ8Im94pgd7XzJwoxmCjbvWLjv8iEIs+75V > TarQ== >X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; > d=1e100.net; s=20161025; > h=x-gm-message-state:date:from:to:cc:subject:message-id:references > :mime-version:content-disposition:in-reply-to:user-agent; > bh=PBSyJWqX0xWOvHCkBs8Ihevl7ryqoqCycatAt5mY+jk=; > b=A6hINwfPWNtRauIWEfo64BqudyKEGBbaV+e5tKOrFCkHT1sBXQodfJTdKTmgZP3jmr > YjrdFZAUv/DaP8Gtbj6XIU4/lYU7FJc3v0VnxYPX0AxS1G73e0qeYktvAE0EEuH9vSe1 > jG2/faXoGDtd7MZjBBmlU8oMkJbFLBcAAhpzTiaKmPj7ibKcOUfmHvoDs9H/RVFBsBLV > ZsPg1dg9l9emQ/WZKae0ffP2sNtBrwUhD1ELi6gjA/UBBqDRWAlMoJGe5jxE4c1UypDV > dCThJbmTZnGqSylZrCwjCgvyMyNLiZoxl+mD9GzAikicQhTJECwCMPjlAhn1WXRU/B7b > k+3g== >X-Gm-Message-State: AJaThX5zx9Zzlxus4m1HCIGz7NApjxSMfI13Hv3bci/ke7AgMFoQX2BM > TJgqtSCcXuD6yqWLu11iZrbWvA== >X-Google-Smtp-Source: AGs4zMbFKvW5hzulZ42+gUcdCrHr4uLDOw0rII+JYwbcNyMX2ZZNlbN3Cvlzo1G9DPB17ENvrGXT9A== >X-Received: by 10.84.240.193 with SMTP id l1mr28243752plt.240.1512695982957; > Thu, 07 Dec 2017 17:19:42 -0800 (PST) >Received: from bubble.grove.modra.org (CPE-58-175-244-173.hdcz1.win.bigpond.net.au. [58.175.244.173]) > by smtp.gmail.com with ESMTPSA id v43sm10787378pgn.65.2017.12.07.17.19.41 > (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); > Thu, 07 Dec 2017 17:19:41 -0800 (PST) >Received: by bubble.grove.modra.org (Postfix, from userid 1000) > id 14DB1C0729; Fri, 8 Dec 2017 11:49:38 +1030 (ACDT) >Date: Fri, 8 Dec 2017 11:49:38 +1030 >From: Alan Modra <amodra@gmail.com> >To: Rolf Eike Beer <eb@emlix.com> >Cc: binutils@sourceware.org >Subject: Re: Binutils 2.29.1 breaks libpcap on sparc32 by filling .got >Message-ID: <20171208011937.GN13179@bubble.grove.modra.org> >References: <13757039.pIICRVicT9@devpool21> > <20171208005012.GM13179@bubble.grove.modra.org> >MIME-Version: 1.0 >Content-Type: text/plain; charset=us-ascii >Content-Disposition: inline >In-Reply-To: <20171208005012.GM13179@bubble.grove.modra.org> >User-Agent: Mutt/1.5.24 (2015-08-30) > >On Fri, Dec 08, 2017 at 11:20:12AM +1030, Alan Modra wrote: >> So it looks like sparc and sparc64 ld needs to be sure to zero section >> contents whenever a RELATIVE relocation is emitted, to avoid this >> glibc bug. > >Please test this. > > * elfxx-sparc.c (_bfd_sparc_elf_relocate_section): When emitting > dynamic R_SPARC_RELATIVE for GOT entries, ensure the section > contents are zeroed. > >diff --git a/bfd/elfxx-sparc.c b/bfd/elfxx-sparc.c >index adc9ed3..9885059 100644 >--- a/bfd/elfxx-sparc.c >+++ b/bfd/elfxx-sparc.c >@@ -3212,10 +3212,6 @@ _bfd_sparc_elf_relocate_section (bfd *output_bfd, > off &= ~1; > else > { >- SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, >- htab->elf.sgot->contents + off); >- h->got.offset |= 1; >- > if (h->dynindx == -1 > && !h->forced_local > && h->root.type != bfd_link_hash_undefweak >@@ -3225,6 +3221,10 @@ _bfd_sparc_elf_relocate_section (bfd *output_bfd, > generate R_SPARC_RELATIVE here. */ > relative_reloc = TRUE; > } >+ else >+ SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, >+ htab->elf.sgot->contents + off); >+ h->got.offset |= 1; > } > } > else >@@ -3245,12 +3245,10 @@ _bfd_sparc_elf_relocate_section (bfd *output_bfd, > else > { > if (bfd_link_pic (info)) >- { >- relative_reloc = TRUE; >- } >- >- SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, >- htab->elf.sgot->contents + off); >+ relative_reloc = TRUE; >+ else >+ SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, >+ htab->elf.sgot->contents + off); > local_got_offsets[r_symndx] |= 1; > } > } >@@ -3271,8 +3269,14 @@ _bfd_sparc_elf_relocate_section (bfd *output_bfd, > outrel.r_info = SPARC_ELF_R_INFO (htab, NULL, > 0, R_SPARC_RELATIVE); > outrel.r_addend = relocation; >- relocation = 0; > sparc_elf_append_rela (output_bfd, s, &outrel); >+ /* Versions of glibc ld.so at least up to 2.26 wrongly >+ add the section contents to the value calculated for >+ a RELATIVE reloc. Zero the contents to work around >+ this bug. */ >+ relocation = 0; >+ SPARC_ELF_PUT_WORD (htab, output_bfd, relocation, >+ htab->elf.sgot->contents + off); > } > > relocation = htab->elf.sgot->output_offset + off - got_base; > >-- >Alan Modra >Australia Development Lab, IBM >
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Attachments on
bug 639976
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508416
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508418
| 526348