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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Jim,<br>
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What I am doing is modeling from ARM and X86 just enough to get "hello world" to produce correct ELF output.
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>From many years of experience I know this will leave me with little understanding of what is going on and I will need to have this understanding to really add long term value. Maybe my questions will help frame the how-to-and-why documentation.<br>
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I think my first patch will include a link from llvm-mc references in CodeGenerator.html pointing to the llvm project blog that discusses what it is trying to do.<br>
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Cheers,<br>
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Jack<br>
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<div style="direction: ltr;" id="divRpF720877"><font color="#000000" face="Tahoma" size="2"><b>From:</b> Jim Grosbach [grosbach@apple.com]<br>
<b>Sent:</b> Thursday, January 12, 2012 10:51 AM<br>
<b>To:</b> Carter, Jack<br>
<b>Cc:</b> Owen Anderson; List<br>
<b>Subject:</b> Re: [LLVMdev] llvm-mc standalone assemblers and testing<br>
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<div>ARM is the best model currently, though x86 does some interesting things as well and is worth looking at.
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<div>If there's anything in particular that's causing head-scratching, just ask. There's not much available in terms of how-to documentation, unfortunately. That's definitely on my TODO list to write, but time constraints are rough right now.</div>
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<div>-Jim</div>
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<div>On Jan 11, 2012, at 8:09 PM, Carter, Jack wrote:</div>
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We are already generating object directly.<span class="Apple-converted-space"> </span><br>
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It is on my roadmap to implement the standalone assembler, but I was hoping for some suggestions ;-)<br>
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My target is Mips and I have started looking at what ARM does. If there is a better model or how-to guide I'd like to know.<br>
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Thanks,<br>
<br>
Jack<br>
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<div id="divRpF706552" style="direction: ltr;"><font color="#000000" face="Tahoma" size="2"><b>From:</b><span class="Apple-converted-space"> </span>Owen Anderson [<a href="mailto:resistor@mac.com" target="_blank">resistor@mac.com</a>]<br>
<b>Sent:</b><span class="Apple-converted-space"> </span>Wednesday, January 11, 2012 6:40 PM<br>
<b>To:</b><span class="Apple-converted-space"> </span>Carter, Jack<br>
<b>Cc:</b><span class="Apple-converted-space"> </span>List<br>
<b>Subject:</b><span class="Apple-converted-space"> </span>Re: [LLVMdev] llvm-mc standalone assemblers and testing<br>
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<div>On Jan 11, 2012, at 6:05 PM, Carter, Jack wrote:</div>
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I have had references to llvm-mc in terms of a tester for MC level code changes and have just found and read the blog<span class="Apple-converted-space"> </span><a href="http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html" target="_blank">http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html</a>.<span class="Apple-converted-space"> </span><br>
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Am I correct that lib/Target/<target>/AsmParser/*.cpp needs to be completed to make a standalone assembler for a specific target and until that is done, llvm-mc can't be used to generate output object that is tested by elf-dump?<br>
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<div>You need to implement an AsmParser if you want to generate object files from assembly files. You can generate object files from higher-level inputs (.c, .ll) without a functional AsmParser as long as your inputs don't use inline assembly.</div>
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<div>--Owen</div>
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