Alexandre Julliard : ntdll: Explicitly check for failure to map page 0.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 3aa6e3bd899c158f043bda300689829ef3b55b9d
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=3aa6e3bd899c158f043bda3006...

Author: Alexandre Julliard 
Date:   Thu Nov  4 17:47:46 2010 +0100

ntdll: Explicitly check for failure to map page 0.

---

dlls/ntdll/virtual.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index 1674a3e..ea1400e 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -993,8 +993,12 @@ static NTSTATUS allocate_dos_memory( struct file_view **view, unsigned int vprot
         addr = wine_anon_mmap( (void *)page_size, 0x10000 - page_size, unix_prot, 0 );
         if (addr == (void *)page_size)
         {
-            addr = NULL;
-            TRACE( "successfully mapped low 64K range\n" );
+            if (!wine_anon_mmap( NULL, page_size, unix_prot, MAP_FIXED ))
+            {
+                addr = NULL;
+                TRACE( "successfully mapped low 64K range\n" );
+            }
+            else TRACE( "failed to map page 0\n" );
         }
         else
         {