Re: Add SystemV IPC drivers to PSIM

[teawater <teawater@gmail.com>]

Hi Joel,

I think maybe you need cc this mail to maintainer of ppc sim Andrew
Cagney <ac131313@redhat.com>.

And porting this patch to gdb-cvs-head and divide it to some small
ones are better for other people review it.

Thanks,
Hui

On Thu, Nov 6, 2008 at 00:54, Joel Sherrill <joel.sherrill@oarcorp.com> wrote:
> Hi,
>
> This is a repost of the patch was originally submitted 8 Sept.
>
> http://sourceware.org/ml/gdb/2008-09/msg00047.html
>
> Could someone please review and commit it?
>
> Thanks.
>
>
> --joel
>
> =====================
>
> As the first year in the copyright shows, this code
> has been around a while. I found a message in the
> RTEMS archives where I was updating it to gdb 4.17. :)
>
>
>
>
> It adds support for System V semaphores and shared memory to psim.
> It adds two files (hw_sem.c and hw_shm.c) and touches configure.ac
> to add tests for support of System V IPC.  Please regenerate
> configure after patching.
>
>
> The shared memory device maps System V shared memory
> into the simulated PowerPC's address space. This lets
> the simulated CPU share data with the host environment.
> This data area can be protected by using the System V
> semaphore device to lock the memory.
>
>
> We use this to run RTEMS multiprocessor tests where the
> two simulated CPUs communicate through the shared memory.
> It has also been used by RTEMS applications to do "device IO"
> to the shared memory and have a custom system simulator
> provide feedback.
>
>
> Can someone please review and commit? Thanks.
>
> 2008-09-08 Joel Sherrill <joel.sherrill@oarcorp.com>
>
>  * configure: Regenerated.
>  * configure.ac: Add test for System V shared memory and semaphore.
>  * debug.c, debug.h: Add trace support for new devices.
>  * hw_sem.c, hw_shm.c: New files.
>  * Makefile.in: Add hw_sem.c and hw_shm.c
>
> --
> Joel Sherrill, Ph.D.             Director of Research & Development
> joel.sherrill@OARcorp.com        On-Line Applications Research
> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
>  Support Available             (256) 722-9985
>
>
>