Alexandre Julliard : wow64: Create the cross-process work list.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: f6ccadda8adfcc4d3463873b22fc5c3b5509bd72
URL:    https://gitlab.winehq.org/wine/wine/-/commit/f6ccadda8adfcc4d3463873b22fc5c3...

Author: Alexandre Julliard <julliard(a)winehq.org>
Date:   Mon Aug 28 11:33:59 2023 +0200

wow64: Create the cross-process work list.

---

 dlls/ntdll/tests/wow64.c |  1 +
 dlls/wow64/syscall.c     | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/dlls/ntdll/tests/wow64.c b/dlls/ntdll/tests/wow64.c
index 418c2c6145f..cc160c061cc 100644
--- a/dlls/ntdll/tests/wow64.c
+++ b/dlls/ntdll/tests/wow64.c
@@ -436,6 +436,7 @@ static void test_peb_teb(void)
                 status = NtMapViewOfSection( handle, GetCurrentProcess(), &addr, 0, 0, NULL,
                                              &size, ViewShare, 0, PAGE_READWRITE );
                 ok( !status, "NtMapViewOfSection failed %lx\n", status );
+                ok( size == 0x4000, "unexpected size %Ix\n", size );
                 data = malloc( size );
                 ret = ReadProcessMemory( pi.hProcess, (void *)(ULONG_PTR)wow64info->CrossProcessWorkList,
                                          data, size, &size );
diff --git a/dlls/wow64/syscall.c b/dlls/wow64/syscall.c
index 113e9f538fb..70c63535ae6 100644
--- a/dlls/wow64/syscall.c
+++ b/dlls/wow64/syscall.c
@@ -798,6 +798,40 @@ static const WCHAR *get_cpu_dll_name(void)
 }
 
 
+/**********************************************************************
+ *           create_cross_process_work_list
+ */
+static NTSTATUS create_cross_process_work_list( WOW64INFO *wow64info )
+{
+    SIZE_T map_size = 0x4000;
+    LARGE_INTEGER size;
+    NTSTATUS status;
+    HANDLE section;
+    CROSS_PROCESS_WORK_LIST *list = NULL;
+    CROSS_PROCESS_WORK_ENTRY *end;
+    UINT i;
+
+    size.QuadPart = map_size;
+    status = NtCreateSection( §ion, SECTION_ALL_ACCESS, NULL, &size, PAGE_READWRITE, SEC_COMMIT, 0 );
+    if (status) return status;
+    status = NtMapViewOfSection( section, GetCurrentProcess(), (void **)&list, default_zero_bits, 0, NULL,
+                                 &map_size, ViewShare, MEM_TOP_DOWN, PAGE_READWRITE );
+    if (status)
+    {
+        NtClose( section );
+        return status;
+    }
+
+    end = (CROSS_PROCESS_WORK_ENTRY *)((char *)list + map_size);
+    for (i = 0; list->entries + i + 1 <= end; i++)
+        RtlWow64PushCrossProcessWorkOntoFreeList( &list->free_list, &list->entries[i] );
+
+    wow64info->SectionHandle = (ULONG_PTR)section;
+    wow64info->CrossProcessWorkList = (ULONG_PTR)list;
+    return STATUS_SUCCESS;
+}
+
+
 /**********************************************************************
  *           process_init
  */
@@ -863,6 +897,8 @@ static DWORD WINAPI process_init( RTL_RUN_ONCE *once, void *param, void **contex
 
     init_syscall_table( module, p__wine_syscall_dispatcher, &ntdll_syscall_table );
 
+    if (wow64info->CpuFlags & WOW64_CPUFLAGS_SOFTWARE) create_cross_process_work_list( wow64info );
+
     init_file_redirects();
     return TRUE;