[PATCH] powerpc: Include .BTF section

[Naveen N. Rao]

Michael Ellerman wrote:
> "Naveen N. Rao" <naveen.n.rao at linux.vnet.ibm.com> writes:
>> Selecting CONFIG_DEBUG_INFO_BTF results in the below warning from ld:
>>   ld: warning: orphan section `.BTF' from `.btf.vmlinux.bin.o' being placed in section `.BTF'
>>
>> Include .BTF section in vmlinux explicitly to fix the same.
> 
> I don't see any other architectures doing this in their linker script.
> Why are we special?

I think this is due to commit 83a092cf95f28 ("powerpc: Link warning for 
orphan sections"):
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=83a092cf95f28

If your question was why I didn't include the .BTF section in .data, 
it's because libbpf seems to expect the .BTF section to be separate.


- Naveen

PS: I also see a linker warning for '.gnu.hash' if I enable 
CONFIG_RELOCATABLE, but I couldn't decipher what that was for, and if it 
should be retained.