Date: Mon, 7 Mar 2016 18:41:49 +0100 From: Dimitry Andric <dim@FreeBSD.org> To: Warner Losh <imp@bsdimp.com> Cc: Konstantin Belousov <kostikbel@gmail.com>, Ian Lepore <ian@freebsd.org>, src-committers <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org> Subject: Re: svn commit: r296428 - head/sys/boot/common Message-ID: <C6FFFB5D-EAE1-4BFA-90EC-6AE2DF67A921@FreeBSD.org> In-Reply-To: <CANCZdforb7gAanu4Hys6b2NmhOGVGn7UutsUqav5gGUsqSTMxA@mail.gmail.com> References: <201603061557.u26FvhMi033982@repo.freebsd.org> <56DCD52F.4010709@freebsd.org> <AC0A9708-B618-4D05-8532-BD451AB94A60@FreeBSD.org> <1457365187.13785.174.camel@freebsd.org> <20160307155217.GJ67250@kib.kiev.ua> <CANCZdforb7gAanu4Hys6b2NmhOGVGn7UutsUqav5gGUsqSTMxA@mail.gmail.com>
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[-- Attachment #1 --] On 07 Mar 2016, at 17:28, Warner Losh <imp@bsdimp.com> wrote: ... > Alternatively, is there a switch to clang 3.8 that says 'Don't generate the new > relocation, use the old one instead" which would also be safe and allow a > less-bumpy transition? On amd64, we actually compile source files for the kernel with -fno-asynchronous-unwind-tables, which is the flag that ensures object files do not end up with a .eh_frame section, because the compiler will refrain from inserting CFI directives into the assembler. However, this only affects C source files, and we have a number of hand-written assembler sources in the tree, with CFI directives in them. These will always result in .eh_frame sections, unless there is another assembler-specific flag of suppressing that. -Dimitry [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.29 iEYEARECAAYFAlbdvWQACgkQsF6jCi4glqPyhACg4rfv1EjG41J0A5YAJBJmqUcC fy4AniNkkS4bi3YjixoLZZRCLGvpWTL1 =EsXH -----END PGP SIGNATURE-----
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