[OpenBIOS] [sparc64] Problematic pci at 0 and pci nodes in the device tree
mark.cave-ayland at siriusit.co.uk
Thu Jan 22 12:41:59 CET 2009
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
(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 ?? ()
Breakpoint 1, openbios () at arch/sparc64/openbios.c:516
516 const struct hwdef *hwdef = NULL;
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