Re: [OpenBIOS] [sparc64] Problematic pci at 0 and pci nodes in the device tree

[Mark Cave-Ayland]

Hi Blue Swirl,
> First, you need binutils and gcc. For cross compiling I'd recommend
> sparc64-elf target, then you avoid a lot of unneeded Linux
> headers/libgcc stuff. At least binutils 2.18 and gcc 4.2.4 build
> working binaries. I still don't have a working cross gdb for Sparc64,
> the obvious configuration (--target=sparc64-elf) doesn't work.

I now have a cross-compile environment setup after a lot of effort. The 
hardest part was building a cross-gdb for Sparc64 as all I ever received 
was the "Reply packet too long error".

I ended up spending about half a day going through the gdb sources until 
I found that unless you specify a platform with configure when you come 
to build gdb, the extra 64-bit register sets don't get built in!

In the end, I went for "./configure --target=sparc64-linux" and 
magically everything started to work. If I build and install the 
non-stripped Sparc64 OpenBIOS built-in image, I can then do this:

qemu-system-sparc64 .... -s -S
sparc64-linux-gdb

(gdb) file openbios-sparc64
Reading symbols from openbios-sparc64...done.
(gdb) break openbios
Breakpoint 1 at 0xffd0d014: file arch/sparc64/openbios.c, line 516.
(gdb) target remote :1234
Remote debugging using :1234
[New Thread 1]
0x000001fff0000020 in ?? ()
(gdb) cont
Continuing.

Breakpoint 1, openbios () at arch/sparc64/openbios.c:516
516             const struct hwdef *hwdef = NULL;

Cool :)

ATB,

Mark.

[sparc64] Problematic pci at 0 and pci nodes in the device tree

[Blue Swirl]

On 1/22/09, Mark Cave-Ayland  wrote:
> Hi Blue Swirl,
> > First, you need binutils and gcc. For cross compiling I'd recommend
> > sparc64-elf target, then you avoid a lot of unneeded Linux
> > headers/libgcc stuff. At least binutils 2.18 and gcc 4.2.4 build
> > working binaries. I still don't have a working cross gdb for Sparc64,
> > the obvious configuration (--target=sparc64-elf) doesn't work.
>
> I now have a cross-compile environment setup after a lot of effort. The
> hardest part was building a cross-gdb for Sparc64 as all I ever received was
> the "Reply packet too long error".
>
> I ended up spending about half a day going through the gdb sources until I
> found that unless you specify a platform with configure when you come to
> build gdb, the extra 64-bit register sets don't get built in!
>
> In the end, I went for "./configure --target=sparc64-linux" and magically
> everything started to work. If I build and install the non-stripped Sparc64
> OpenBIOS built-in image, I can then do this:

Thanks, that was the trick! Now I also have a working cross gdb for Sparc64.