[llvm-dev] Can JIT be targeted to 32-bit in a 64-bit Wndows environment?

Lang Hames via llvm-dev llvm-dev at lists.llvm.org
Thu Oct 29 14:19:01 PDT 2015

Hi Dibyendu,

I'm not familiar with Windows at all, but I assume you can't mix 64-bit and
32-bit code in the one process.

Reid - Are we generating correct call frame information for windows yet (
https://llvm.org/PR24233) ? If so, I think Dibyendu would just have to
override registerEHFrames/deregisterEHFrames and have them call
RtlInstallFunctionTableCallback/RtlAddFunctionTable, right?

- Lang.

On Sun, Oct 25, 2015 at 5:30 AM, Dibyendu Majumdar via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi
> On 64-bit Windows the lack of proper stack unwinding support causes
> crashes in JIT code generated by LLVM. I was wondering if it is
> possible to ask LLVM to generate 32-bit code - and if that would work
> within a 64-bit Windows application - i.e. the rest of the system will
> be 64-bit only the generated code will be 32-bit. I was also wondering
> if this would allow me to workaround the crashes due to stack
> unwinding problems.
> Thanks and Regards
> Dibyendu
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> llvm-dev at lists.llvm.org
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