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<div>Hi Saleem,</div>
<div><br>
</div>
<div>Though a simple app works great I am facing few issues trying to link a slightly complex object file, generated via LLVM, with some libs generated via Visual Studio - </div>
<div>1. Seems IMAGE_SCN_MEM_16BIT is only written for the the first header in the COFF file, thus functions in other headers (if you are using function sections) don’t work. I was able to workaround this by forcing this entry for each header by making some
(hacky) changes in LLVM sources. I am not much familiar with the LLVM source code, thus would better let the experts to do a correct fix for this issue.</div>
<div>2. There is something strange happening with <b>b.w</b> instruction in the final linked executable. I see that in the disassembly for object code (generated via LLVM with thumbv7-windows-msvc triple), the b.w instruction correctly points to the label I
want. But after linking, it now points to some random address. Seems like there are some fixup issues related to
<b>b.w</b> instruction. Note that I am using Visual Studio’s linker to create a Window’s phone app.</div>
<div><br>
</div>
<div>I would really appreciate any help, or pointers for further investigation, for the second issue above.</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Daman</div>
<div><br>
</div>
<div>On 09/06/14 8:45 pm, "Saleem Abdulrasool" <<a href="mailto:abdulras@fb.com">abdulras@fb.com</a>> wrote:</div>
<div><br>
</div>
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<div><br>
</div>
<div>On Jun 8, 2014, at 10:46 PM, Damanjit Singh <<a href="mailto:dsingh@adobe.com">dsingh@adobe.com</a>> wrote:</div>
<div><br>
</div>
<blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>Thanks a lot Saleem,</div>
<div></div>
<div>The issue is fixed and a simple app works fine now.</div>
</blockquote>
<div><br>
</div>
<div>Awesome; thanks for the verification.</div>
<div><br>
</div>
<blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>-Daman</div>
<div></div>
<div>On 08/06/14 12:57 pm, "Nick Lewycky" <<a href="mailto:nicholas@mxc.ca">nicholas@mxc.ca</a>> wrote:</div>
<div></div>
<blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>Damanjit Singh wrote:</div>
<blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>Thanks Saleem, Nick.</div>
<div></div>
<div>I will try with the latest code and share the results.</div>
<div></div>
<div>Though, just curious if I need to really use clang to generate the</div>
<div>object file and the current steps won't work? I ask because using .c</div>
<div>file was only an illustration. For my project the IR is not generated</div>
<div>from .c files or clang.</div>
</blockquote>
<div></div>
<div>You don't need to use clang. When you use clang you have to tell it what</div>
<div>target it's targeting.</div>
<div></div>
<div>If you're starting with IR, try "llc -filetype=obj foo.bc -o foo.obj</div>
<div>-mtriple=..." to produce a .o file directly. I'm not experienced with it</div>
<div>myself but I've heard that MSVC will produce assembly that it can't</div>
<div>parse, so it's probably a good idea to leave assembly out of the</div>
<div>equation when targeting Windows.</div>
<div></div>
<div>Nick</div>
<div></div>
<blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>On 08-Jun-2014, at 11:00 am, "Saleem Abdulrasool" <<a href="mailto:compnerd@compnerd.org">compnerd@compnerd.org</a></div>
<div><<a href="mailto:compnerd@compnerd.org>">mailto:compnerd@compnerd.org></a>> wrote:</div>
<div></div>
<blockquote id="MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style="BORDER-LEFT: #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>On Sat, Jun 7, 2014 at 4:49 PM, Nick Lewycky <<a href="mailto:nicholas@mxc.ca">nicholas@mxc.ca</a></div>
<div><<a href="mailto:nicholas@mxc.ca>">mailto:nicholas@mxc.ca></a>> wrote:</div>
<div></div>
<div> Damanjit Singh wrote:</div>
<div></div>
<div> Hi guys,</div>
<div></div>
<div> Would really appreciate any help here.</div>
<div></div>
<div> Thanks,</div>
<div> Daman</div>
<div></div>
<div> From: Damanjit Singh <<a href="mailto:dsingh@adobe.com">dsingh@adobe.com</a></div>
<div> <<a href="mailto:dsingh@adobe.com">mailto:dsingh@adobe.com</a>> <<a href="mailto:dsingh@adobe.com>>">mailto:dsingh@adobe.com>></a>> <<a href="mailto:dsingh@adobe.com>>">mailto:dsingh@adobe.com>></a>></div>
<div></div>
<div> Date: Friday, 6 June 2014 12:57 pm</div>
<div> To: "<a href="mailto:llvmdev@cs.uiuc.edu">llvmdev@cs.uiuc.edu</a> <<a href="mailto:llvmdev@cs.uiuc.edu">mailto:llvmdev@cs.uiuc.edu</a>></div>
<div> <<a href="mailto:llvmdev@cs.uiuc.edu%20%3Cmailto:llvmdev@cs.uiuc.edu>>">mailto:llvmdev@cs.uiuc.edu%20%3Cmailto:llvmdev@cs.uiuc.edu>></a>"</div>
<div> <<a href="mailto:llvmdev@cs.uiuc.edu">llvmdev@cs.uiuc.edu</a> <<a href="mailto:llvmdev@cs.uiuc.edu">mailto:llvmdev@cs.uiuc.edu</a>></div>
<div> <<a href="mailto:llvmdev@cs.uiuc.edu%20%3Cmailto:llvmdev@cs.uiuc.edu>>">mailto:llvmdev@cs.uiuc.edu%20%3Cmailto:llvmdev@cs.uiuc.edu>></a>></div>
<div></div>
<div> Subject: Support for Windows Phone 8.1</div>
<div></div>
<div> Hi LLVMdev,</div>
<div></div>
<div> Does the latest trunk code support Windows Phone 8.1 target ?</div>
<div></div>
<div></div>
<div> I don't know this, but ...</div>
<div></div>
<div> I was trying out a simple program, but Visual Studio 2013¹s</div>
<div>linker</div>
<div> failed for me with this error - app.obj : error LNK2008: Fixup</div>
<div> target is</div>
<div> not aligned Œadd3'</div>
<div></div>
<div> This is what I tried -</div>
<div></div>
<div> * Download latest LLVM sources (as on 4th June) and build them</div>
<div> on my</div>
<div> MAC 10.9 machine.</div>
<div> * Wrote a simple a.c, with add3 function-</div>
<div></div>
<div></div>
<div> int add3(int i, int j)</div>
<div> {</div>
<div> int k = i+j;</div>
<div> return k;</div>
<div> }</div>
<div></div>
<div> * Create LLVM IR using Xcode 5.1¹s clang ( *clang S -O0</div>
<div> -emitllvm a.c* )</div>
<div> * Create obj file using llc - *. /i686-apple-darwin11-llc</div>
<div> -filetype=obj -mtriple=thumbv7-windows-msvc -O0 a.s *</div>
<div></div>
<div></div>
<div> ... in general this doesn't work. The transformation from C to</div>
<div> LLVM IR needs to know the target triple. Try "clang</div>
<div> --target=thumbv7-windows-msvc a.c -c -o a.obj"? Since clang has a</div>
<div> built-in assembler, you should get a valid COFF file out, to the</div>
<div> extent that clang and llvm support this target.</div>
<div></div>
<div> If that doesn't work, I may suggest it's unsupported.</div>
<div></div>
<div></div>
<div>As Nick mentioned, please generate the object file directly from</div>
<div>clang. You can use armv7-windows or thumbv7-windows (clang will</div>
<div>translate armv7-windows to thumbv7-windows implicitly). I just fixed a</div>
<div>bug that should allow you to link the object files with link.</div>
<div></div>
<div> Nick</div>
<div></div>
<div> * Now on a Windows 8.1 Desktop machine, link this object file</div>
<div> into</div>
<div></div>
<div> sample (new DirectX app, windows phone) Visual Studio 2013</div>
<div> project.</div>
<div> * Declare and Call add3 in the sample windows project.</div>
<div> * I then get a linker error on building the solution.</div>
<div></div>
<div> *1>app.obj : error LNK2008: Fixup target is not aligned 'add3'*</div>
<div> *1>LINK : fatal error LNK1165: link failed because of fixup</div>
<div> errors*</div>
<div> *========== Rebuild All: 0 succeeded, 1 failed, 0 skipped</div>
<div> ==========*</div>
<div></div>
<div></div>
<div></div>
<div> Could someone please confirm about the state of support for</div>
<div> Windows</div>
<div> Phone 8.1 ? Or am I missing something here?</div>
<div></div>
<div> Thanks,</div>
<div> Daman</div>
<div></div>
<div></div>
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<div>--</div>
<div>Saleem Abdulrasool</div>
<div>compnerd (at) compnerd (dot) org</div>
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<div>-- </div>
<div>Saleem Abdulrasool</div>
<div>abdulras (at) fb (dot) com</div>
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