PowerPC64 future proof kernel toc, revised for lld

[Alexey Kardashevskiy]

One more question - the older version had a construct "DEFINED (.TOC.) ? 
.TOC. : ..." in case .TOC. is not defined (too old ld? too old gcc?) but 
the newer patch seems assuming it is always defined, when was it added? 
I have the same check in SLOF, for example, do I still need it?




On 10/03/2021 16:07, Alan Modra wrote:
> On Wed, Mar 10, 2021 at 03:44:44PM +1100, Alexey Kardashevskiy wrote:
>> For my own education, is .got for prom_init.o still generated by ld or gcc?
> 
> .got is generated by ld.
> 
>> In other words, should "objdump -D -s -j .got" ever dump .got for any .o
>> file, like below?
> 
> No.  "objdump -r prom_init.o | grep GOT" will tell you whether
> prom_init.o *may* cause ld to generate .got entries.  (Linker
> optimisations or --gc-sections might remove the need for those .got
> entries.)
> 
>> objdump: section '.got' mentioned in a -j option, but not found in any input
>> file
> 
> Right, expected.
> 

-- 
Alexey Kardashevskiy
IBM OzLabs, LTC Team

e-mail: aik at linux.ibm.com