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Message-ID: <20150912032950.GZ17773@brightrain.aerifal.cx> Date: Fri, 11 Sep 2015 23:29:50 -0400 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Cc: 0pf@...mu.org Subject: Re: Re: [0pf] musl/SH-FDPIC progress On Fri, Sep 11, 2015 at 03:05:22PM -0400, Rich Felker wrote: > On Thu, Sep 10, 2015 at 09:48:50PM -0400, Rich Felker wrote: > > I now have a working prototype of static-linked FDPIC binary support > > in musl libc using gcc 5.2 (with the forward-ported SH-FDPIC patch) > > and binutils 2.25.1. I've tested simple example programs and some > > non-trivial examples with threads and they work both under qemu-sh4eb > > with FDPIC support added (needs a small patch) and on real J2 > > hardware, where they successfully share text/execute-in-place. > > > > The gcc patch is presently against gcc with all the other patches from > > my musl-cross-make repo applied, so some refactoring will be needed to > > propose it upstream, but I think it's ready for initial review. After > > a little bit more cleanup (mainly bad specs logic) I'll go ahead and > > put a version of this patch in the toolchain repo. > > I've posted the current version of my patches in my toolchain repo: > > https://github.com/richfelker/musl-cross-make/commit/3a0c9775b69ae311d89b6a9df6788d43f206cf6c > > As noted in the commit message, a patch on the musl side is needed to > get actual working binaries. I'll post a version of this (not > appropriate for upstream) soon. Actually I just went ahead and got the static-linking-only part suitable for upstream and committed it. As of this commit to musl: http://git.musl-libc.org/cgit/musl/commit/?id=d4c82d05b8d0ee97f6356d60986799a95ed5bd74 it should be possible to get a working fdpic build. Note that PIE is not supported yet and my toolchain build has a GCC patch to always force -pie. So patches/gcc-5.2.0/0006-defaultpie.diff needs to be removed before starting to get a working fdpic toolchain right now. Rich
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