[patch] implement __clear_cache for arm32 & mips

[JF Bastien]

(I'm unfamiliar with MIPS, simply reviewing the ARM code)

* It would be better to put the ARM code with the NetBSD ARM code, not
separate.
* Some platforms apparently fail doing this properly, and syscall returns
an error. I don't know if Android guarantees that this works, but it may be
worth checking the return value and aborting on syscall failure.
* JITs I've seen all use inline asm with a straight call to svc (with
proper ARM/Thumb headache). There seems to be mysticism around this that
I've never quite grasped, since the compiler should just emit the svc. See:
http://v8.googlecode.com/svn/branches/bleeding_edge/src/arm/cpu-arm.cc



On Wed, Feb 26, 2014 at 8:36 AM, Narayan Kamath <narayan at google.com> wrote:

> Note that both arm32 and mips flavours of this code generate
> a syscall.
>
>
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