Jacek Caban : ntdll: Introduce RtlSetLastWin32Error for unixlibs that additionally sets 32-bit error on wow64.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 35ae4703c4e92f97a32ee28cfdb11375427bf790
URL:    https://gitlab.winehq.org/wine/wine/-/commit/35ae4703c4e92f97a32ee28cfdb11375427bf790

Author: Jacek Caban <jacek at codeweavers.com>
Date:   Sat Jul 30 15:30:32 2022 +0200

ntdll: Introduce RtlSetLastWin32Error for unixlibs that additionally sets 32-bit error on wow64.

---

 dlls/ntdll/unix/env.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/dlls/ntdll/unix/env.c b/dlls/ntdll/unix/env.c
index 17450b5ab4c..105038a34cb 100644
--- a/dlls/ntdll/unix/env.c
+++ b/dlls/ntdll/unix/env.c
@@ -2390,3 +2390,19 @@ ULONG WINAPI RtlNtStatusToDosError( NTSTATUS status )
 
     return map_status( status );
 }
+
+/**********************************************************************
+ *      RtlSetLastWin32Error  (ntdll.so)
+ */
+void WINAPI RtlSetLastWin32Error( DWORD err )
+{
+    TEB *teb = NtCurrentTeb();
+#ifdef _WIN64
+    if (teb->WowTebOffset)
+    {
+        TEB32 *teb32 = (TEB32 *)((char *)teb + teb->WowTebOffset);
+        teb32->LastErrorValue = err;
+    }
+#endif
+    teb->LastErrorValue = err;
+}