Re: [PATCH]: gdb: fdpic/frv: fix shared library loading

[Andrew Stubbs <ams at codesourcery dot com>]

On 14/04/10 07:59, Mike Frysinger wrote:
> While I have no way of testing the FRV, the Blackfin FDPIC code is using this
> same base in a 100% copy&  paste method since we implemented FDPIC the same
> way as the FRV guys (I'll address this in the future).  This fix was required
> in order to handle shared libraries with Blackfin FDPIC properly, and I see no
> reason why it wouldn't also work for FRV (since the uClibc ldso FDPIC code is
> the same too and that's really what this is poking).

I'm currently working on FDPIC support for SH-2A uClinux, so I have been 
poking at this same area myself.

The FRV code would not work for me out of the box - it's a little too 
FRV specific, so I started work on another copy and paste, but thought 
better of it.

What I've got now is the bones of a solib-fdpic.c which is intended to 
be architecture independent. This should be possible since, so far, all 
the FDPIC Linux implementations I've seen use the same basic ABI, and 
the SH FDPIC will follow suit.

The first major departure from solib-frv.c is that I've implemented a 
new qXfer remote protocol packet to retrieve the load maps (a pseudo 
register did not seem like a good plan). This should be target 
independent also - I believe FRV has the same ptrace interface as SH, so 
it should Just Work.

My implementation isn't complete, by any means, but I intend to submit 
the first patches soon. I have not attempted to interfere with the FRV 
support in any way.

Andrew