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Message-Id: <20120930000141.0167901f.idunham@lavabit.com>
Date: Sun, 30 Sep 2012 00:01:41 -0700
From: Isaac Dunham <idunham@...abit.com>
To: musl@...ts.openwall.com
Cc: aboriginal@...ts.landley.net
Subject: Re: microblaze port committed
On Sat, 29 Sep 2012 01:41:57 -0400
Rich Felker <dalias@...ifal.cx> wrote:
> Hi all,
>
> I've committed the initial (and seemingly fully-working) version of
> the microblaze port. Several caveats:
>
> 1. Upstream binutils has a serious bug in gas whereby the relocations
> it generates for symbols with local weak definitions cannot be
> resolved by the linker. Patch at:
> http://permalink.gmane.org/gmane.linux.uclinux.microblaze/11155
>
> 2. The toolchain binaries from Xilinx seem to produce .o files
> incompatible with standard binutils, and vice versa. Pick one or
> the other; don't mix them.
For Landley's sake, I'll mention what we discussed on IRC (+ some details):
-The Xilinx toolchain is binutils 2.16 + gcc 4.1.2 (GPLv2); binutils support was merged upstream in 2009, so Aboriginal would need the Xilinx EDK toolchain (see http://git.xilinx.com/?p=mb_gnu.git;a=summary ofor source)
-Rich says that on microblaze, due to the way relocations are handled, using -Bsymbolic instead of -Bsymbolic-functions gives a libc.so that is either minimally broken or fully operational.
(Mips also works with -Bsymbolic.)
-The possibility of using mapfiles instead of -Bsymbolic-functions was mentioned, but Rich doubts that they were supported in older binutils.
> 3. Threads are untested because qemu is broken, at least my version of
> qemu (app-level emu) has a bug where clone() does not advance the
> program counter properly in the child, so it starts a forkbomb-like
> cascade of clone syscalls (thankfully just linear growth rather
> than exponential).
Ow.
Rob, any thoughts on an Aboriginal port?
--
Isaac Dunham <idunham@...abit.com>
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