PowerPC C++ kernel woes.

[Andrei Warkentin]

Hello,

I've been trying to get some C++ running (now that I can print "Hello  
World" from OF, I'd like to move my "Hello World" C++ kernel to  
PowerPC), but it has been without much success.
I've finally figured out that there are these small data sections  
which I was not taking care of in my ld script (sdata, sbss, sdata2,  
sbss2). Prior to me figuring this out, I would get a crash. After I  
added these sections, I've noticed several globals appear in .sbss  
(using powerpc-linux-nm to see all syms), but now I get CLAIM failed  
while loading my kernel in OF. Odd.

So I guess I have several questions:
    Am I doing something wrong w.r.t sdata, sbss, sbss2, and sdata2  
in my ld script? I am also not sure as to how these should be  
aligned, if at all.
    What about _SDA_BASE_ and _SDA_BASE2_? AFAIK, these should point  
in the middle of the sdata+sbss and sdata2+sbss2. Should I load r13  
and r14 with these values?
   So far my code doesn't appear to use either register.

I 've been doing this for SDA_BASE and SDA2_BASE
 PROVIDE (_SDA_BASE_ = ld_sdata + ((ld_sbss_end - ld_sdata) / 2));
 PROVIDE (_SDA2_BASE_ = ld_sdata2 + ((ld_sbss2_end - ld_sdata2) / 2));

... but the linker seems to ignore my values and gives
 0020f000 G _SDA_BASE_
00210000 G _SDA2_BASE_
( kernel linked @ 2MB, same way as I linked my C hello world example,  
which works just fine).

Thanks and have a great day.

/* The sdata section. */
.sdata ALIGN(0x1000): {
  ld_sdata = .;

  /* SData. */
  *(.sdata)
  *(.gnu.linkonce.s.*)
  ld_sdata_end = .;
}

.sbss : {
  ld_sbss = .;

  /* BSS. */
  *(.sbss)
  *(.scommon)
  ld_sbss_end = .;
}

/* The sdata2 section. */
.sdata2 ALIGN(0x1000): {
  ld_sdata2 = .;

  /* SData2. */
  *(.sdata2)
  *(.gnu.linkonce.s2.*)
  ld_sdata2_end = .;
}

/* The SBSS2 section. */
.sbss2 : {
  ld_sbss2 = .;

  /* SBSS2. */
  *(.sbss2)
  *(.gnu.linkonce.sb2.*)
  ld_sbss2_end = .;
}