Hi,
I got the hello sample to compile.
This means the host library works in RTEMS.
But let's start at the beginning.
I separated libcpu and score and defined native and virtual CPU's in
libcpu/i386.
The difference between the two are interrupts.h and _CPU_ISR_Set_level,
_CPU_Fatal_halt, _CPU_Thread_Idle_body. Native is using these functions
as they are defined for normal hardware, virtual translates these to
calls to the virtual Layer.
virtLayerCPU.h: Created, defining functions for interrupts, idle, error
handling.
This is implemented in POK and libpart.a is compiled and copied to
rtems/libbsp/i386/virtPok.
The virtPok makefile creates a new library file called libpokpart.a.
If libpart.a is not present, virtPok fails at compile time.
I thought 'noinst_LIBRARIES' would define the libraries going into
librtemsbsp.a but sadly this is not dynamic. I had to modify
c/src/wrapup/Makefile.am to include libpokpart.a. This is not final, as
it breaks all other BSPs ...
I still have issues with the GDT and IDT. But with a dummy variable
_Global_descriptor_table to prevent an unresolved dependency error, I
could compile the hello sample.
Hacky, but YAY. :)
I brought it back to POK as a partition, but it's failing to start this
partition. I didn't care for the start-up code yet, so this was expected.
What to take away from this:
The build process is semi automated and works so far.
Code: https://github.com/phipse/rtems/tree/virt-bsp
Cheers,
Philipp
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