make unoptimized sparc64 build usable with linux kernel

[Igor Kovalenko]

Hi!

After doing some homework with sparc64-elf-gcc -O0 :) I made this
local change in sparc64-call-client.diff
It allocates larger stack frame so unoptimized code could save
arguments on stack, and then calls of_client_interface().
This at least allows me to use debugger with qemu and unoptimized
sparc64 openbios build.

make unoptimized sparc64 build usable with linux kernel

[Blue Swirl]

On 4/17/09, Igor Kovalenko  wrote:
> Hi!
>
> After doing some homework with sparc64-elf-gcc -O0 :) I made this
>  local change in sparc64-call-client.diff
>  It allocates larger stack frame so unoptimized code could save
>  arguments on stack, and then calls of_client_interface().
>  This at least allows me to use debugger with qemu and unoptimized
>  sparc64 openbios build.

Maybe the real solution is to implement context switching (context.c
switch_to()) so that we use the OpenBIOS stack instead of kernel
stack? Though flushing windows may be tricky.

The delay slot instructions should be preceded by one extra space.