Date: Fri, 7 Dec 2007 00:01:08 GMT From: "Pedro F. Giffuni" <giffunip@tutopia.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/118473: Linuxulator: ELF Notes vs. brandelf Message-ID: <200712070001.lB7018tn076302@www.freebsd.org> Resent-Message-ID: <200712070010.lB70A1wr049170@freefall.freebsd.org>
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>Number: 118473 >Category: kern >Synopsis: Linuxulator: ELF Notes vs. brandelf >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Dec 07 00:10:01 UTC 2007 >Closed-Date: >Last-Modified: >Originator: Pedro F. Giffuni >Release: 6.3-RC1 >Organization: >Environment: FreeBSD kakumen.cable.net.co 6.3-RC1 FreeBSD 6.3-RC1 #6: Mon Dec 3 16:11:52 COT 2007 root@kakumen.cable.net.co:/usr/src/sys/amd64/compile/SMP amd64 >Description: Since 1999 FreeBSD has always used the standard ELF identification branding for it's binaries: http://docs.freebsd.org/cgi/mid.cgi?199902271905.LAA10250 However GNU/Linux chose to misinterpret the standard and is using vendor specific ELF notes instead: http://www.netbsd.org/docs/kernel/elf-notes.html As a result we have had to use brandelf(1) to tag the linux binaries in order to use them with the linux ABI. As a side note, OpenWatcom does generate properly branded linux binaries. >How-To-Repeat: Our linux emulation wiki mentions the following "bug" reported by running the Linux Test Project under the linuxulator: - report by LTP and/or the linux pkill command: "2.4+ kernel w/o ELF notes? -- report this" >Fix: Our loader should probably know about ELF notes and try to use them for the linuxulator when/if the standard EI_OSABI is not present; the linuxulator might also need some additional knowledge from ELF notes. While brandelf(1) is still a sound utility to have around, this way we wouldn't require it for GNU platforms. >Release-Note: >Audit-Trail: >Unformatted:
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