On Sat, 2005-11-26 at 18:42 -0600, Andrei Warkentin wrote: > 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).
I'd suggest starting with the system-provided linker script and modify that as needed, rather than trying to write your own from scratch. > AFAIK, some default ld-script is > used while building GRUB2. Am I correct? Is this the standard ld- > script used to be exec-objects under PPCLinux? Yes, GRUB uses the (unmodified) default linker script (see ld -verbose). > My other question is one of alignment. Looking at various > PPC-related > ld-scripts I found through Google, a lot seem concerned with > aligning > data/bss by 4 bytes or by 8. Is there any reason for this? AFAIK, > the > default linux one does not care about alignment a whole lot. As far > as I understand, PPC can cope with misaligned data in hardware. Alignment is important to hardware. I have personally dealt with a very difficult-to-debug problem where the stack was misaligned. Different PowerPC can fix up different misaligned accesses in hardware, but always with a performance impact. You should align anything that needs alignment. My only other advice is that this is not a good place to ask these questions. You might try linuxppc-dev or the binutils list. -Hollis _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
