Hi, I'm migrating my code (running on mac) from using JIT to MCJIT. My code generates in memory, mostly using the llvm-c api, and then runs the generated code. When I try to use MCJIT I encounter a problem with relocations of external symbols – functions compiled statically beforehand with gcc. I get the following error: Invalid relocation type! UNREACHABLE executed at /Users/weisse4/dev/llvm/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp:89 While debugging, I see that the relocation type read in RuntimeDyldImpl::loadObject is 218103811, which seems corrupt to me. Did someone encounter a similar error? Or can direct me to changes that I need to do while migrating from JIT to MCJIT? Thanks. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130409/95253b9c/attachment.html>
? 2013/4/9 21:08, Weiss, Eran ??:> Hi, > > I'm migrating my code (running on mac) from using JIT to MCJIT. My > code generates in memory, mostly using the llvm-c api, and then runs > the generated code. > When I try to use MCJIT I encounter a problem with relocations of > external symbols -- functions compiled statically beforehand with gcc. > > I get the following error: > > Invalid relocation type! > UNREACHABLE executed at > /Users/weisse4/dev/llvm/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp:89 > > While debugging, I see that the relocation type read in > RuntimeDyldImpl::loadObject is 218103811, which seems corrupt to me.Hi Weiss, I do not have any experience on Mach binary format, but the hex value of 218103811 is 0xd000003 (maybe the relocation type is RIT_Generic_PreboundLazyPointer = 3), something looks like a relocation entry composed of "symbol index" + "relocation type". maybe something is wrong, that the relocation entry is not anded with a mask to get the final relocation type. --- Regards, Jiong> Did someone encounter a similar error? Or can direct me to changes > that I need to do while migrating from JIT to MCJIT? > > Thanks. > > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130409/4f65a370/attachment.html>
Thank you for the help.
The relocation type value is anded with 0xffffffffL. (RuntimeDyldMachO.cpp:214)
Maybe this mask should be different?
Anyway, it seems like this relocation isn't implemented.
(RuntimeDyldMachO.cpp:104)
From: Jiong Wang <jiwang at tilera.com<mailto:jiwang at tilera.com>>
Date: Tue, 9 Apr 2013 09:42:03 -0400
To: Eran Weiss <eran.weiss at emc.com<mailto:eran.weiss at emc.com>>
Cc: "llvmdev at cs.uiuc.edu<mailto:llvmdev at cs.uiuc.edu>"
<llvmdev at cs.uiuc.edu<mailto:llvmdev at cs.uiuc.edu>>
Subject: Re: [LLVMdev] Migration from JIT to MCJIT
于 2013/4/9 21:08, Weiss, Eran 写道:
Hi,
I'm migrating my code (running on mac) from using JIT to MCJIT. My code
generates in memory, mostly using the llvm-c api, and then runs the generated
code.
When I try to use MCJIT I encounter a problem with relocations of external
symbols – functions compiled statically beforehand with gcc.
I get the following error:
Invalid relocation type!
UNREACHABLE executed at
/Users/weisse4/dev/llvm/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp:89
While debugging, I see that the relocation type read in is 218103811, which
seems corrupt to me.
Hi Weiss,
I do not have any experience on Mach binary format, but the hex value of
218103811 is 0xd000003 (maybe the relocation type is
RIT_Generic_PreboundLazyPointer = 3), something looks like a relocation entry
composed of "symbol index" + "relocation type".
maybe something is wrong, that the relocation entry is not anded with a mask
to get the final relocation type.
---
Regards,
Jiong
Did someone encounter a similar error? Or can direct me to changes that I need
to do while migrating from JIT to MCJIT?
Thanks.
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