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Date: Mon, 20 May 2013 19:21:16 +0200
From: Katja Malvoni <>
Subject: Re: Parallella: bcrypt

On Mon, May 20, 2013 at 7:12 PM, Solar Designer <> wrote:

> Katja -
> On Mon, May 20, 2013 at 08:57:52PM +0400, Solar Designer wrote:
> > On Mon, May 20, 2013 at 06:45:26PM +0200, Katja Malvoni wrote:
> > > I tried to reuse the existing Openwall bcrypt implementation since
> > > parallella supports C. I first tried the simplest approach, load whole
> > > bcrypt implementation onto the core and execute. The problem is:
> > > core_test.elf section `.text' will not fit in region `INTERNAL_RAM'
> > > region `INTERNAL_RAM' overflowed by 6528 bytes
> >
> > Note that you do not have to put the entire bcrypt onto Epiphany.
> [...]
> > (implementing just the main loop instead of the entire bcrypt on
> > Epiphany) should reduce code size to put on Epiphany by a factor of 3.
> A possibly simpler and possibly better option, especially given the
> approach you've taken so far, may be to put a size-optimized
> implementation of entire bcrypt on Epiphany.  Here is a revision of
> crypt_blowfish that we made for musl libc:

I tried compiling code with -O1 option a few minutes before your first
replay, it fits the internal ram. I tried to test it, but I'm currently
struggling with host/Epiphany communication.

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