Zebediah Figura : ntdll: Stub Wow64Transition.
Alexandre Julliard
julliard at winehq.org
Mon Mar 1 15:54:05 CST 2021
Module: wine
Branch: master
Commit: 0421ea397571650c5c6217b95e39cbd098b6c5b0
URL: https://source.winehq.org/git/wine.git/?a=commit;h=0421ea397571650c5c6217b95e39cbd098b6c5b0
Author: Zebediah Figura <z.figura12 at gmail.com>
Date: Thu Feb 25 21:38:31 2021 -0600
ntdll: Stub Wow64Transition.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=45567
Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
---
dlls/ntdll/loader.c | 37 +++++++++++++++++++++++++++++++++++++
dlls/ntdll/ntdll.spec | 1 +
2 files changed, 38 insertions(+)
diff --git a/dlls/ntdll/loader.c b/dlls/ntdll/loader.c
index 2a6b8467812..6c86e6b2e6c 100644
--- a/dlls/ntdll/loader.c
+++ b/dlls/ntdll/loader.c
@@ -3928,6 +3928,38 @@ static void restart_winevdm( RTL_USER_PROCESS_PARAMETERS *params )
RtlInitUnicodeString( ¶ms->CommandLine, cmdline );
}
+#ifndef _WIN64
+void *Wow64Transition = NULL;
+
+static void map_wow64cpu(void)
+{
+ SIZE_T size = 0;
+ OBJECT_ATTRIBUTES attr;
+ UNICODE_STRING string;
+ HANDLE file, section;
+ IO_STATUS_BLOCK io;
+ NTSTATUS status;
+
+ RtlInitUnicodeString( &string, L"\\??\\C:\\windows\\sysnative\\wow64cpu.dll" );
+ InitializeObjectAttributes( &attr, &string, 0, NULL, NULL );
+ if ((status = NtOpenFile( &file, GENERIC_READ | SYNCHRONIZE, &attr, &io, FILE_SHARE_READ,
+ FILE_SYNCHRONOUS_IO_NONALERT | FILE_NON_DIRECTORY_FILE )))
+ {
+ WARN("failed to open wow64cpu, status %#x\n", status);
+ return;
+ }
+ if (!NtCreateSection( §ion, STANDARD_RIGHTS_REQUIRED | SECTION_QUERY |
+ SECTION_MAP_READ | SECTION_MAP_EXECUTE,
+ NULL, NULL, PAGE_EXECUTE_READ, SEC_COMMIT, file ))
+ {
+ NtMapViewOfSection( section, NtCurrentProcess(), &Wow64Transition, 0,
+ 0, NULL, &size, ViewShare, 0, PAGE_EXECUTE_READ );
+ NtClose( section );
+ }
+ NtClose( file );
+}
+#endif
+
/***********************************************************************
* process_init
@@ -4037,6 +4069,11 @@ static NTSTATUS process_init(void)
build_ntdll_module();
+#ifndef _WIN64
+ if (is_wow64)
+ map_wow64cpu();
+#endif
+
if ((status = load_dll( params->DllPath.Buffer, L"C:\\windows\\system32\\kernel32.dll",
NULL, 0, &wm )) != STATUS_SUCCESS)
{
diff --git a/dlls/ntdll/ntdll.spec b/dlls/ntdll/ntdll.spec
index 78f06881832..ac7365a84b6 100644
--- a/dlls/ntdll/ntdll.spec
+++ b/dlls/ntdll/ntdll.spec
@@ -1129,6 +1129,7 @@
@ stdcall WinSqmIsOptedIn()
@ stdcall WinSqmSetDWORD(ptr long long)
@ stdcall WinSqmStartSession(ptr long long)
+@ extern -arch=win32 Wow64Transition
@ stdcall -private -syscall ZwAcceptConnectPort(ptr long ptr long ptr ptr) NtAcceptConnectPort
@ stdcall -private -syscall ZwAccessCheck(ptr long long ptr ptr ptr ptr ptr) NtAccessCheck
@ stdcall -private -syscall ZwAccessCheckAndAuditAlarm(ptr long ptr ptr ptr long ptr long ptr ptr ptr) NtAccessCheckAndAuditAlarm
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