Alexandre Julliard : server: Add custom flag for fake dlls in PE image information.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: f244c3b5ebfae0bcbe13b127c4b3abd356a22f7e
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=f244c3b5ebfae0bcbe13b127c...

Author: Alexandre Julliard <julliard(a)winehq.org>
Date:   Sat Feb  9 15:23:47 2019 +0100

server: Add custom flag for fake dlls in PE image information.

Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 dlls/ntdll/virtual.c           |  2 +-
 include/wine/server_protocol.h |  3 ++-
 server/mapping.c               | 20 +++++++++++++++-----
 server/protocol.def            |  1 +
 4 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/dlls/ntdll/virtual.c b/dlls/ntdll/virtual.c
index 030c658..c008db7 100644
--- a/dlls/ntdll/virtual.c
+++ b/dlls/ntdll/virtual.c
@@ -3200,7 +3200,7 @@ void virtual_fill_image_information( const pe_image_info_t *pe_info, SECTION_IMA
     info->DllCharacteristics   = pe_info->dll_charact;
     info->Machine              = pe_info->machine;
     info->ImageContainsCode    = pe_info->contains_code;
-    info->u.ImageFlags         = pe_info->image_flags;
+    info->u.ImageFlags         = pe_info->image_flags & ~IMAGE_FLAGS_WineFakeDll;
     info->LoaderFlags          = pe_info->loader_flags;
     info->ImageFileSize        = pe_info->file_size;
     info->CheckSum             = pe_info->checksum;
diff --git a/include/wine/server_protocol.h b/include/wine/server_protocol.h
index 48c9723..63f65cd 100644
--- a/include/wine/server_protocol.h
+++ b/include/wine/server_protocol.h
@@ -714,6 +714,7 @@ typedef struct
 #define IMAGE_FLAGS_ImageDynamicallyRelocated 0x04
 #define IMAGE_FLAGS_ImageMappedFlat           0x08
 #define IMAGE_FLAGS_BaseBelow4gb              0x10
+#define IMAGE_FLAGS_WineFakeDll               0x80
 
 struct rawinput_device
 {
@@ -6553,6 +6554,6 @@ union generic_reply
     struct terminate_job_reply terminate_job_reply;
 };
 
-#define SERVER_PROTOCOL_VERSION 571
+#define SERVER_PROTOCOL_VERSION 572
 
 #endif /* __WINE_WINE_SERVER_PROTOCOL_H */
diff --git a/server/mapping.c b/server/mapping.c
index bc59b21..37c17b0 100644
--- a/server/mapping.c
+++ b/server/mapping.c
@@ -555,11 +555,17 @@ static int load_clr_header( IMAGE_COR20_HEADER *hdr, size_t va, size_t size, int
 /* retrieve the mapping parameters for an executable (PE) image */
 static unsigned int get_image_params( struct mapping *mapping, file_pos_t file_size, int unix_fd )
 {
-    IMAGE_DOS_HEADER dos;
+    static const char fakedll_signature[] = "Wine placeholder DLL";
+
     IMAGE_COR20_HEADER clr;
     IMAGE_SECTION_HEADER sec[96];
     struct
     {
+        IMAGE_DOS_HEADER dos;
+        char buffer[sizeof(fakedll_signature)];
+    } mz;
+    struct
+    {
         DWORD Signature;
         IMAGE_FILE_HEADER FileHeader;
         union
@@ -570,15 +576,17 @@ static unsigned int get_image_params( struct mapping *mapping, file_pos_t file_s
     } nt;
     off_t pos;
     int size;
-    size_t clr_va, clr_size;
+    size_t mz_size, clr_va, clr_size;
     unsigned int i, cpu_mask = get_supported_cpu_mask();
 
     /* load the headers */
 
     if (!file_size) return STATUS_INVALID_FILE_FOR_SECTION;
-    if (pread( unix_fd, &dos, sizeof(dos), 0 ) != sizeof(dos)) return STATUS_INVALID_IMAGE_NOT_MZ;
-    if (dos.e_magic != IMAGE_DOS_SIGNATURE) return STATUS_INVALID_IMAGE_NOT_MZ;
-    pos = dos.e_lfanew;
+    size = pread( unix_fd, &mz, sizeof(mz), 0 );
+    if (size < sizeof(mz.dos)) return STATUS_INVALID_IMAGE_NOT_MZ;
+    if (mz.dos.e_magic != IMAGE_DOS_SIGNATURE) return STATUS_INVALID_IMAGE_NOT_MZ;
+    mz_size = size;
+    pos = mz.dos.e_lfanew;
 
     size = pread( unix_fd, &nt, sizeof(nt), pos );
     if (size < sizeof(nt.Signature) + sizeof(nt.FileHeader)) return STATUS_INVALID_IMAGE_FORMAT;
@@ -691,6 +699,8 @@ static unsigned int get_image_params( struct mapping *mapping, file_pos_t file_s
     mapping->image.gp            = 0; /* FIXME */
     mapping->image.file_size     = file_size;
     mapping->image.loader_flags  = clr_va && clr_size;
+    if (mz_size == sizeof(mz) && !memcmp( mz.buffer, fakedll_signature, sizeof(fakedll_signature) ))
+        mapping->image.image_flags |= IMAGE_FLAGS_WineFakeDll;
 
     /* load the section headers */
 
diff --git a/server/protocol.def b/server/protocol.def
index 73e0868..e65b984 100644
--- a/server/protocol.def
+++ b/server/protocol.def
@@ -730,6 +730,7 @@ typedef struct
 #define IMAGE_FLAGS_ImageDynamicallyRelocated 0x04
 #define IMAGE_FLAGS_ImageMappedFlat           0x08
 #define IMAGE_FLAGS_BaseBelow4gb              0x10
+#define IMAGE_FLAGS_WineFakeDll               0x80
 
 struct rawinput_device
 {