Alexandre Julliard : ntdll: Support the ARM64EC work list in RtlOpenCrossProcessEmulatorWorkConnection.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 6928a14d9800fd8dce35ab9ff5873617713558b1
URL:    https://gitlab.winehq.org/wine/wine/-/commit/6928a14d9800fd8dce35ab9ff587361...

Author: Alexandre Julliard <julliard(a)winehq.org>
Date:   Tue Jul  9 12:20:05 2024 +0200

ntdll: Support the ARM64EC work list in RtlOpenCrossProcessEmulatorWorkConnection.

---

 dlls/ntdll/process.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/dlls/ntdll/process.c b/dlls/ntdll/process.c
index 16bc445b7f9..8906e254cc0 100644
--- a/dlls/ntdll/process.c
+++ b/dlls/ntdll/process.c
@@ -314,17 +314,30 @@ void WINAPI RtlOpenCrossProcessEmulatorWorkConnection( HANDLE process, HANDLE *s
 {
     WOW64INFO wow64info;
     BOOLEAN is_wow64;
+    HANDLE handle = 0;
     SIZE_T size = 0;
 
     *addr = NULL;
     *section = 0;
 
+    if (RtlIsCurrentProcess( process )) return;
     if (RtlWow64GetSharedInfoProcess( process, &is_wow64, &wow64info )) return;
-    if (!is_wow64) return;
-    if (!wow64info.SectionHandle) return;
 
-    if (NtDuplicateObject( process, (HANDLE)(ULONG_PTR)wow64info.SectionHandle,
-                           GetCurrentProcess(), section, 0, 0, DUPLICATE_SAME_ACCESS ))
+    if (is_wow64) handle = (HANDLE)(ULONG_PTR)wow64info.SectionHandle;
+#if defined __aarch64__ || defined __arm64ec__
+    else
+    {
+        PROCESS_BASIC_INFORMATION basic;
+        struct arm64ec_shared_info info;
+
+        if (!NtQueryInformationProcess( process, ProcessBasicInformation, &basic, sizeof(basic), NULL ) &&
+            !NtReadVirtualMemory( process, (PEB *)basic.PebBaseAddress + 1, &info, sizeof(info), NULL ))
+            handle = info.SectionHandle;
+    }
+#endif
+
+    if (!handle) return;
+    if (NtDuplicateObject( process, handle, GetCurrentProcess(), section, 0, 0, DUPLICATE_SAME_ACCESS ))
         return;
 
     if (!NtMapViewOfSection( *section, GetCurrentProcess(), addr, 0, 0, NULL,