[PATCH] ntdll: Do not force 2G stack limit for the main thread of 64 bit process.

[Paul Gofman]

Signed-off-by: Paul Gofman <pgofman at codeweavers.com>
---
     Dragon Quest Builders 2 define 2GB default stack size in 64bit PE header. Since
     the first thread has 2GB VM limit enforced for native stack the stack allocation
     fails and the process cannot be created.

 dlls/ntdll/unix/loader.c | 2 +-
 dlls/ntdll/unix/thread.c | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/dlls/ntdll/unix/loader.c b/dlls/ntdll/unix/loader.c
index ab12a4ea1c0..5eb201bd90b 100644
--- a/dlls/ntdll/unix/loader.c
+++ b/dlls/ntdll/unix/loader.c
@@ -2169,7 +2169,7 @@ static void start_main_thread(void)
     if (p___wine_main_wargv) *p___wine_main_wargv = main_wargv;
     *(ULONG_PTR *)&peb->CloudFileFlags = get_image_address();
     set_load_order_app_name( main_wargv[0] );
-    init_thread_stack( teb, is_win64 ? 0x7fffffff : 0, 0, 0 );
+    init_thread_stack( teb, 0, 0, 0 );
     NtCreateKeyedEvent( &keyed_event, GENERIC_READ | GENERIC_WRITE, NULL, 0 );
     load_ntdll();
     if (main_image_info.Machine != current_machine) load_wow64_ntdll( main_image_info.Machine );
diff --git a/dlls/ntdll/unix/thread.c b/dlls/ntdll/unix/thread.c
index 618ebb82bfb..0488129aa4c 100644
--- a/dlls/ntdll/unix/thread.c
+++ b/dlls/ntdll/unix/thread.c
@@ -1156,7 +1156,8 @@ NTSTATUS init_thread_stack( TEB *teb, ULONG_PTR zero_bits, SIZE_T reserve_size,
 
 #ifdef _WIN64
         /* 32-bit stack */
-        if ((status = virtual_alloc_thread_stack( &stack, zero_bits, reserve_size, commit_size, 0 )))
+        if ((status = virtual_alloc_thread_stack( &stack, zero_bits ? zero_bits : 0x7fffffff,
+                                                  reserve_size, commit_size, 0 )))
             return status;
         wow_teb->Tib.StackBase = PtrToUlong( stack.StackBase );
         wow_teb->Tib.StackLimit = PtrToUlong( stack.StackLimit );
-- 
2.35.1