[LLVMdev] LLVM "Native" Backend

[Christopher Lamb]

On Mar 30, 2007, at 12:35 PM, Christopher Lamb wrote:

>
> On Mar 18, 2007, at 7:05 PM, Chris Lattner wrote:
>
>> On Sun, 18 Mar 2007, Christopher Lamb wrote:
>>>> LLVM can currently produce .o files directly in some limited cases,
>>>> or you
>>>> can go through an assembler, which is much more robust.  Any help
>>>> improving the direct ELF writer would be appreciated.
>>>
>>> Which of the LLVM tools can currently produce .o files directly
>>> without going through the platform's as/ld? How do I specify this on
>>> the command line to any of the tools?
>>
>> llc -filetype=obj
>>
>> I think that this is disabled for ELF, but you can easily enable it.
>> Macho works pretty well, but ELF is not entirely finished.  Any  
>> help would
>> be appreciated: basing the work on the macho writer would be  
>> appropriate.
>
> So I've increased the support for ELF writing, but it's certainly  
> not done yet. I fixed a few bugs that were preventing it from  
> emitting correct elf headers, so if there are no ELF relocations  
> emitted (i.e. the target can handle all of the relocations at code  
> emission) then this change set should allow one to write a  
> perfectly valid ELF REL file.
>
> I've got preliminary support for relocations, the data structures  
> to be precise, and refactored some of the ELF writer to be more  
> like the MachO writer.
>
> Should I try to submit a patch for the partial work that I've done?

Should a PR be opened for ELF output?

--
Christopher Lamb



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