From owner-svn-src-head@freebsd.org Sat Nov 3 19:52:09 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 849DC10E275A for ; Sat, 3 Nov 2018 19:52:09 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 014768EEDE; Sat, 3 Nov 2018 19:52:08 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from tom.home (kib@localhost [127.0.0.1]) by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id wA3Jpwhp014132 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sat, 3 Nov 2018 21:52:01 +0200 (EET) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua wA3Jpwhp014132 Received: (from kostik@localhost) by tom.home (8.15.2/8.15.2/Submit) id wA3Jpvk1014131; Sat, 3 Nov 2018 21:51:57 +0200 (EET) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Sat, 3 Nov 2018 21:51:57 +0200 From: Konstantin Belousov To: Mark Millard Cc: svn-src-head@freebsd.org, Alexander Richardson Subject: Re: svn commit: r339876 - head/libexec/rtld-elf Message-ID: <20181103195157.GT5335@kib.kiev.ua> References: <003A49D7-6E8B-4775-A70B-E0EB44505D4B@yahoo.com> <20181102113827.GM5335@kib.kiev.ua> <7B29A4C8-228D-41CB-B594-98DFA456E9C8@yahoo.com> <20181102155234.GN5335@kib.kiev.ua> <20181102185014.GP5335@kib.kiev.ua> <34554290-D26E-4FED-A598-4FB3E313EA92@yahoo.com> <20181103154955.GR5335@kib.kiev.ua> <1AD60949-F621-4F24-8985-B02102824EB1@yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1AD60949-F621-4F24-8985-B02102824EB1@yahoo.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FORGED_GMAIL_RCVD,FREEMAIL_FROM, NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on tom.home X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Nov 2018 19:52:09 -0000 On Sat, Nov 03, 2018 at 12:04:53PM -0700, Mark Millard wrote: > 80903 ld-elf.so.1 CALL mmap(0x10000,0xb000,0,0x6010,0xffffffff,0x10000,0,0) > 80903 ld-elf.so.1 RET mmap -1 errno 12 Cannot allocate memory This is the allocation of VA for the whole binary. I guess that the normal non-PIE binary virtual base on arm is 0x10000. I put the arm PIE base at 0x12000, which obviously causes the conflict between pre-loaded ld-elf.so.1 and later attempt to mmap the binary at the linked address. In fact I am happy that we added MAP_EXCL and it catched the situation. You can try to change ET_DYN_LOAD_ADDR on arm: diff --git a/sys/arm/include/elf.h b/sys/arm/include/elf.h index 7424b45e78f..28fc14e3dae 100644 --- a/sys/arm/include/elf.h +++ b/sys/arm/include/elf.h @@ -84,7 +84,7 @@ __ElfType(Auxinfo); */ #define MAGIC_TRAMP_NUMBER 0x5c000003 -#define ET_DYN_LOAD_ADDR 0x12000 +#define ET_DYN_LOAD_ADDR 0x500000 /* Flags passed in AT_HWCAP. */ #define HWCAP_SWP 0x00000001 /* Unsupported, never set. */