[Mono-dev] MIPS support status

Miguel de Icaza miguel at xamarin.com
Thu Jun 20 01:23:38 UTC 2013


We did a port for a specific board/ABI (I do not have the docs, I am
currently away from work).   But it is possible that you will need to
adjust/tune up for different MIPS instruction sets and ABIs.

Adjusting Mono to different ABIs/configurations will likely require those
that own that hardware to provide the patches.


On Thu, Jun 13, 2013 at 3:53 PM, Zoltan Gyarmati <
mr.zoltan.gyarmati at gmail.com> wrote:

> Hello,
> in the last weeks i was playing around to get the Mono runtime  3.0.10
> built with openwrt and work on a MIPS based router (TL-WDR4300,
> technical details here: http://wiki.openwrt.org/toh/tp-link/tl-wdr4300).
> Already the building required some patching, some of them openwrt
> specific, some of them mono specific, probably i'll publish them later.
>   After some experimenting and recompiling, the runtime seems to be
> working on the target hw, but apparently the floating point support is
> broken, so i couldn't get further than a simple helloworld application.
> During searching about the issue, i found this bug:
> https://bugzilla.xamarin.com/show_bug.cgi?id=7981 , which probably has
> the same root cause, but it seems the bug is not assigned to anybody
> although it's more the 7 months old.
>  Surfing on the internet i find references which say the MIPS arch is
> supported ( http://www.mono-project.com/Supported_Platforms,
> http://www.mono-project.com/Release_Notes_Mono_3.0#MIPS_port ,etc), and
> some others where it says it's "not supported" or "community supported",
> see Zoltan Varga's comments in the linked bug report for instance. So
> now i'm wondering whether the MIPS arch is officially supported or not?
> And If it's generally supported then which CPU versions are supported?
> Big- and/or little endianess is supported? Hard and/or soft FPU-s are
> supported?
>  And more specifically: as i really just getting familiar with the Mono
> internals (nice piece of sw btw:), i can't really see how much work is
> needed to make this work properly on my CPU (MIPS 74kc, without hard
> FPU), so i'm interested in any hints and estimation regarding to this.
> (Naturally i'll attach test results, configurations, stacktraces when
> it's needed, for now you can see a trace attached to the linked bug...)
> Thanks in advance, best regards:
> zgyarmati
> --
> br,
> Zoltan Gyarmati
> mail: mr.zoltan.gyarmati at gmail.com
> freenode nick: zgyarmati
> _______________________________________________
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