Fw: Lua was Re: Quickstart Build instructions

[Chris Johns]

On 10/04/2018 10:40, Gedare Bloom wrote:
> On Mon, Apr 9, 2018 at 4:17 PM, Russell Haley <russ.haley at gmail.com
> <mailto:russ.haley at gmail.com>> wrote:
>             I'd like to start with getting other Lua scripts running. My goal is
>             to load a library called penlight that's a few dozens of files. Is
>             there a utility for creating and loading resources? I'll also look
>             at compiling the files using the luac compiler, but that's outside
>             of rtems.
> 
> No worries. There is evolving support (pretty mature by now) for dynamically
> loading object code, if that is what you mean: the Runtime Loader (RTL).  I
> don't have any experience with it though. Chris Johns is the expert on that topic.
>  

The support is based around the standard calls 'dlopen' etc. You can load ELF
object files. You do need a symbol table in the kernel and a simple makefile
recipe can be found in the testsuite which works on the sparc simulator:

https://git.rtems.org/rtems/tree/testsuites/libtests/Makefile.am#n319

 (search for TEST_dl01 in the Makefile.am if the line has moved)

Note, the erc32 sim does not have access to a host's file system so you will
need to package the object files into a tar file just as the test does.

Chris