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<p class="MsoNormal"><span lang="EN-GB">I figured out that this problem is caused because “planschiValue” has a REL32 relocation and the addresses between the code and the variable overflows 32bit.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Is there any workaround for this kind of issue?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:DE">From:</span></b><span lang="EN-US" style="mso-fareast-language:DE"> llvm-dev <llvm-dev-bounces@lists.llvm.org>
<b>On Behalf Of </b>Gaier, Bjoern via llvm-dev<br>
<b>Sent:</b> 20 August 2020 12:15<br>
<b>To:</b> LLVM Developers Mailing List <llvm-dev@lists.llvm.org>; Lang Hames <lhames@gmail.com><br>
<b>Subject:</b> [llvm-dev] ORC JIT - Incorrect support for COFF files?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">Hey LLVM-Mailing-List and Lang,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I’m still learning how to use the ORC JIT but I finally reached the point to JIT and execute some code. For this purpose I created a test file (TestModule.cpp) and compiled it with Clang, generating two different files,
one in the LLVM IR format and one in the Microsoft COFF format.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt;text-autospace:none"><span lang="EN-GB">The JIT resolves all undefined references, including “</span><span lang="EN-GB" style="font-size:9.5pt;font-family:Consolas;color:blue">extern</span><span lang="EN-GB" style="font-size:9.5pt;font-family:Consolas;color:black">
</span><span lang="EN-GB" style="font-size:9.5pt;font-family:Consolas;color:blue">int</span><span lang="EN-GB" style="font-size:9.5pt;font-family:Consolas;color:black"> planschiValue;</span><span lang="EN-GB">” and “</span><span lang="EN-GB" style="font-size:9.5pt;font-family:Consolas;color:blue">void</span><span lang="EN-GB" style="font-size:9.5pt;font-family:Consolas;color:black">
externFunction();</span><span lang="EN-GB">”. Using the IR Module I will get the correct address for “planschiValue” and the correct value – however this is not the case for the object file.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-GB">For the object file I get (via printf from the module) the address 0x000002295D6B003C while the actual address is 0x00007FF71D9959A4.
<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-GB">I’m really surprised about this, because the IR module works with no problem. I attach the source code, the IR file and the resulting object file (including its assembly file).<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-GB">Any ideas what I’m doing wrong?<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-GB">Thank you for the help in advance and kind greetings<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-GB">Björn<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:DE">Als GmbH eingetragen im Handelsregister Bad Homburg v.d.H. HRB 9816, USt.ID-Nr. DE 114 165 789 Geschäftsführer: Dr. Hiroshi Nakamura, Dr. Robert Plank, Markus Bode, Heiko Lampert, Takashi Nagano, Junichi
Tajika, Ergin Cansiz. <o:p></o:p></span></p>
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Als GmbH eingetragen im Handelsregister Bad Homburg v.d.H. HRB 9816, USt.ID-Nr. DE 114 165 789 Geschäftsführer: Dr. Hiroshi Nakamura, Dr. Robert Plank, Markus Bode, Heiko Lampert, Takashi Nagano, Junichi Tajika, Ergin Cansiz.
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