Alexandre Julliard : ntdll: Export the LDT copy from ntdll instead of libwine.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 9d588819febfa6483a90900bf570b0e2cc09a4d3
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=9d588819febfa6483a90900bf...

Author: Alexandre Julliard <julliard(a)winehq.org>
Date:   Wed Apr  1 22:57:51 2020 +0200

ntdll: Export the LDT copy from ntdll instead of libwine.

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

---

 dlls/krnl386.exe16/selector.c |  2 +-
 dlls/ntdll/ntdll.spec         |  1 +
 dlls/ntdll/server.c           |  5 ++++-
 dlls/ntdll/signal_i386.c      | 21 ++++++++++++++-------
 4 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/dlls/krnl386.exe16/selector.c b/dlls/krnl386.exe16/selector.c
index 5702b25999..73284cf073 100644
--- a/dlls/krnl386.exe16/selector.c
+++ b/dlls/krnl386.exe16/selector.c
@@ -75,7 +75,7 @@ void init_selectors(void)
     if (!is_gdt_sel( wine_get_gs() )) first_ldt_entry += 512;
     if (!is_gdt_sel( wine_get_fs() )) first_ldt_entry += 512;
     RtlSetBits( &ldt_bitmap, 0, first_ldt_entry );
-    ldt_copy = (struct ldt_copy *)&wine_ldt_copy;
+    ldt_copy = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "__wine_ldt_copy" );
 }
 
 /***********************************************************************
diff --git a/dlls/ntdll/ntdll.spec b/dlls/ntdll/ntdll.spec
index 13b0317744..873eef55d0 100644
--- a/dlls/ntdll/ntdll.spec
+++ b/dlls/ntdll/ntdll.spec
@@ -1558,6 +1558,7 @@
 @ cdecl wine_server_release_fd(long long)
 @ cdecl wine_server_send_fd(long)
 @ cdecl __wine_make_process_system()
+@ extern -arch=i386 __wine_ldt_copy
 
 # Debugging
 @ cdecl -norelay __wine_dbg_get_channel_flags(ptr)
diff --git a/dlls/ntdll/server.c b/dlls/ntdll/server.c
index 4facdc08a7..df847d09a2 100644
--- a/dlls/ntdll/server.c
+++ b/dlls/ntdll/server.c
@@ -1448,6 +1448,9 @@ void server_init_process(void)
  */
 void server_init_process_done(void)
 {
+#ifdef __i386__
+    extern struct ldt_copy __wine_ldt_copy;
+#endif
     PEB *peb = NtCurrentTeb()->Peb;
     IMAGE_NT_HEADERS *nt = RtlImageNtHeader( peb->ImageBaseAddress );
     void *entry = (char *)peb->ImageBaseAddress + nt->OptionalHeader.AddressOfEntryPoint;
@@ -1471,7 +1474,7 @@ void server_init_process_done(void)
     {
         req->module   = wine_server_client_ptr( peb->ImageBaseAddress );
 #ifdef __i386__
-        req->ldt_copy = wine_server_client_ptr( &wine_ldt_copy );
+        req->ldt_copy = wine_server_client_ptr( &__wine_ldt_copy );
 #endif
         req->entry    = wine_server_client_ptr( entry );
         req->gui      = (nt->OptionalHeader.Subsystem != IMAGE_SUBSYSTEM_WINDOWS_CUI);
diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c
index e812f634ff..0e033d53ba 100644
--- a/dlls/ntdll/signal_i386.c
+++ b/dlls/ntdll/signal_i386.c
@@ -2306,6 +2306,13 @@ int CDECL __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
 #define LDT_FLAGS_32BIT     0x40  /* Segment is 32-bit (code or stack) */
 #define LDT_FLAGS_ALLOCATED 0x80  /* Segment is allocated */
 
+struct ldt_copy
+{
+    void         *base[LDT_SIZE];
+    unsigned int  limit[LDT_SIZE];
+    unsigned char flags[LDT_SIZE];
+} __wine_ldt_copy;
+
 static WORD gdt_fs_sel;
 
 static RTL_CRITICAL_SECTION ldt_section;
@@ -2417,11 +2424,11 @@ static void ldt_set_entry( WORD sel, LDT_ENTRY entry )
     exit(1);
 #endif
 
-    wine_ldt_copy.base[index]  = ldt_get_base( entry );
-    wine_ldt_copy.limit[index] = ldt_get_limit( entry );
-    wine_ldt_copy.flags[index] = (entry.HighWord.Bits.Type |
-                                  (entry.HighWord.Bits.Default_Big ? LDT_FLAGS_32BIT : 0) |
-                                  LDT_FLAGS_ALLOCATED);
+    __wine_ldt_copy.base[index]  = ldt_get_base( entry );
+    __wine_ldt_copy.limit[index] = ldt_get_limit( entry );
+    __wine_ldt_copy.flags[index] = (entry.HighWord.Bits.Type |
+                                    (entry.HighWord.Bits.Default_Big ? LDT_FLAGS_32BIT : 0) |
+                                    LDT_FLAGS_ALLOCATED);
 }
 
 static void ldt_init(void)
@@ -2464,7 +2471,7 @@ WORD ldt_alloc_fs( TEB *teb, int first_thread )
         ldt_lock();
         for (idx = first_ldt_entry; idx < LDT_SIZE; idx++)
         {
-            if (wine_ldt_copy.flags[idx]) continue;
+            if (__wine_ldt_copy.flags[idx]) continue;
             ldt_set_entry( (idx << 3) | 7, entry );
             break;
         }
@@ -2479,7 +2486,7 @@ static void ldt_free_fs( WORD sel )
     if (sel == gdt_fs_sel) return;
 
     ldt_lock();
-    wine_ldt_copy.flags[sel >> 3] = 0;
+    __wine_ldt_copy.flags[sel >> 3] = 0;
     ldt_unlock();
 }