[PATCH 3/3] dbghelp: fix failing SymInitialize for a live 32bit target from a 64bit caller in WOW64

[Dean Greer]

If the patch requires staging patch sets wouldn’t it make sense to carry
the patch in staging for the time being?

On Wed, Sep 1, 2021 at 10:43 AM Eric Pouech <eric.pouech at orange.fr> wrote:

> Le 31/08/2021 à 15:32, Alexandre Julliard a écrit :
>
> Eric Pouech <eric.pouech at orange.fr> <eric.pouech at orange.fr> writes:
>
>
> Offsetting by 0x1000 is fine.
>
> But I'd say that the ELF data should be stored in the 64-bit PEB. Also
> note that once the new Wow64 architecture is enabled, all ELF data
> inside 32-bit processes is going to be 64-bit.
>
>
> ok I'll resend the serie with just offsetting for now.
>
> is there a way to test the new WoW64 arch before it's enabled?
>
> You can try the patch below. Note that you need to apply the
> ntdll-NtAlertThreadByThreadId series from wine-staging first.
>
>
> thanks
>
>
> didn't run into anything dramatic ;-)
>
> no specific issues on dbghelp testing on my side
>
>
> as I understand the new DLL scheme (for a WOW64 DLL on 64bit cpu)
>
> - wine loader will always be a 64bit ELF
>
> - all ELF required libs will be loaded as 64bit ELF into that process
>
> - PE module will be 32bit PE but with thunks to 64bit code for interaction
> with ELF DLLs
>
> one of the current interest of winedbg was the ability to show both the PE
> modules and the ELF modules and debug both
>
> this will open a nice can of worms as it would require multiple CPUs
> support for the same process :-(
>
>
> MS debugger has the ability to switch back and forth between the two
> worlds (ie set CPU), but requires specific command to display a combined
> (mutli CPU) backtrace
>
>
> note: your patch doesn't apply cleanly on top of wine-staging/
> ntdll-NtAlertThreadByThreadId
>
> (some stuff in common on the wine-staging series and the patch ; I hope I
> got the conflict resolution right)
>
>
> A+
>
>
>
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