Alexandre Julliard : ntdll: Store the 32-bit PEB in the process initial 32-bit context.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 44de9743bfeb088b0aa038da82ba118ce4ab30a4
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=44de9743bfeb088b0aa038da8...

Author: Alexandre Julliard 
Date:   Wed Aug  4 12:42:44 2021 +0200

ntdll: Store the 32-bit PEB in the process initial 32-bit context.

Signed-off-by: Alexandre Julliard

---

dlls/ntdll/unix/signal_x86_64.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/ntdll/unix/signal_x86_64.c b/dlls/ntdll/unix/signal_x86_64.c
index 2769ebf24d6..bfc5b34a464 100644
--- a/dlls/ntdll/unix/signal_x86_64.c
+++ b/dlls/ntdll/unix/signal_x86_64.c
@@ -2929,7 +2929,7 @@ void DECLSPEC_HIDDEN call_init_thunk( LPTHREAD_START_ROUTINE entry, void *arg, B
     {
         wow_context->ContextFlags = CONTEXT_I386_ALL;
         wow_context->Eax = (ULONG_PTR)entry;
-        wow_context->Ebx = (ULONG_PTR)arg;
+        wow_context->Ebx = (arg == peb ? get_wow_teb( teb )->Peb : (ULONG_PTR)arg);
         wow_context->Esp = get_wow_teb( teb )->Tib.StackBase - 16;
         wow_context->Eip = pLdrSystemDllInitBlock->pRtlUserThreadStart;
         wow_context->SegCs = cs32_sel;