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

[Reid Kleckner via llvm-dev]

You actually can mix 32 and 64 bit code in the same Windows process, but
only with great effort. Fixing PR24233 is probably easier. :)

We know how to generate the info, but we still have to get it registered...

On Thu, Oct 29, 2015 at 2:19 PM, Lang Hames via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> 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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>
>
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