--- libEMF-1.0.3/include/libEMF/wine/winnt.h.s390	2009-06-03 15:25:09.000000000 +0200
+++ libEMF-1.0.3/include/libEMF/wine/winnt.h	2009-06-03 15:36:56.000000000 +0200
@@ -45,6 +45,10 @@
 # define WORDS_BIGENDIAN
 # define BITFIELDS_BIGENDIAN
 # undef  ALLOW_UNALIGNED_ACCESS
+#elif defined(__s390__)
+# define WORDS_BIGENDIAN
+# define BITFIELDS_BIGENDIAN
+# undef  ALLOW_UNALIGNED_ACCESS
 #elif !defined(RC_INVOKED)
 # error Unknown CPU architecture!
 #endif
@@ -1065,6 +1069,65 @@ typedef struct _CONTEXT
 
 #endif  /* __sparc__ */
 
+#ifdef __s390__
+
+/* 
+ * FIXME:  
+ *
+ * There is no official CONTEXT structure defined for the S390
+ * architecture, so I just made one up.
+ *
+ * Note that this structure contains only the 'top-level' registers;
+ * the rest of the register window chain is not visible.
+ *
+ * The layout is based on the sparc one.
+ * 
+ */ 
+
+#define CONTEXT_S390C            0x20000000
+
+#define CONTEXT_CONTROL         (CONTEXT_S390 | 0x00000001)
+#define CONTEXT_FLOATING_POINT  (CONTEXT_S390 | 0x00000002)
+#define CONTEXT_INTEGER         (CONTEXT_S390 | 0x00000004)
+
+#define CONTEXT_FULL (CONTEXT_CONTROL | CONTEXT_FLOATING_POINT | CONTEXT_INTEGER)
+
+typedef struct _CONTEXT
+{
+    DWORD ContextFlags;
+
+    /* These are selected by CONTEXT_INTEGER */
+    DWORD r0;
+    DWORD r1;
+    DWORD r2;
+    DWORD r3;
+    DWORD r4;
+    DWORD r5;
+    DWORD r6;
+    DWORD r7;
+    DWORD r8;
+    DWORD r9;
+    DWORD r10;
+    DWORD r11;
+    DWORD r12;
+    DWORD r13;
+    DWORD r14;
+    DWORD r15;
+
+    /* FIXME: this section is fictional (copied from sparc) */
+    DWORD psr;
+    DWORD pc;
+    DWORD npc;
+    DWORD y;
+    DWORD wim;
+    DWORD tbr;
+
+    /* FIXME: floating point registers missing */
+
+} CONTEXT;
+
+#endif  /* __s390__ */
+
 #if !defined(CONTEXT_FULL) && !defined(RC_INVOKED)
 #error You need to define a CONTEXT for your CPU
 #endif
@@ -1183,6 +1246,33 @@ typedef CONTEXT *PCONTEXT;
 
 #endif /* __sparc__ */
 
+#ifdef __s390__
+/* FIXME: use getcontext() to retrieve full context */
+#define _GET_CONTEXT \
+    CONTEXT context;   \
+    do { memset(&context, 0, sizeof(CONTEXT));            \
+         context.ContextFlags = CONTEXT_CONTROL;          \
+         context.pc = (DWORD)__builtin_return_address(0); \
+       } while (0)
+
+#define DEFINE_REGS_ENTRYPOINT_0( name, fn ) \
+  void WINAPI name ( void ) \
+  { _GET_CONTEXT; fn( &context ); }
+#define DEFINE_REGS_ENTRYPOINT_1( name, fn, t1 ) \
+  void WINAPI name ( t1 a1 ) \
+  { _GET_CONTEXT; fn( a1, &context ); }
+#define DEFINE_REGS_ENTRYPOINT_2( name, fn, t1, t2 ) \
+  void WINAPI name ( t1 a1, t2 a2 ) \
+  { _GET_CONTEXT; fn( a1, a2, &context ); }
+#define DEFINE_REGS_ENTRYPOINT_3( name, fn, t1, t2, t3 ) \
+  void WINAPI name ( t1 a1, t2 a2, t3 a3 ) \
+  { _GET_CONTEXT; fn( a1, a2, a3, &context ); }
+#define DEFINE_REGS_ENTRYPOINT_4( name, fn, t1, t2, t3, t4 ) \
+  void WINAPI name ( t1 a1, t2 a2, t3 a3, t4 a4 ) \
+  { _GET_CONTEXT; fn( a1, a2, a3, a4, &context ); }
+
+#endif /* __s390__ */
+
 #ifdef __PPC__
 
 /* FIXME: use getcontext() to retrieve full context */