diff --git a/dlls/ntdll/exception.c b/dlls/ntdll/exception.c
index 07e161a..ee0425a 100644
--- a/dlls/ntdll/exception.c
+++ b/dlls/ntdll/exception.c
@@ -27,7 +27,12 @@
  
 #ifdef __i386__
 # define GET_IP(context) ((LPVOID)(context)->Eip)
-#else
+#endif
+#ifdef __sparc__
+# define GET_IP(context) ((LPVOID)(context)->pc)
+#endif
+
+#ifndef GET_IP
 # error You must define GET_IP for this CPU
 #endif  /* __i386__ */
 
diff --git a/include/winnt.h b/include/winnt.h
index fd62044..b39f46d 100644
--- a/include/winnt.h
+++ b/include/winnt.h
@@ -533,6 +533,82 @@
 
 #endif  /* __PPC__ */
 
+#ifdef __sparc__
+
+/* 
+ * FIXME:  
+ *
+ * There is no official CONTEXT structure defined for the SPARC 
+ * architecture, so I just made one up.
+ *
+ * This structure is valid only for 32-bit SPARC architectures,
+ * not for 64-bit SPARC.
+ *
+ * Note that this structure contains only the 'top-level' registers;
+ * the rest of the register window chain is not visible.
+ *
+ * The layout follows the Solaris 'prgregset_t' structure.
+ * 
+ */ 
+
+#define CONTEXT_SPARC            0x10000000
+
+#define CONTEXT_CONTROL         (CONTEXT_SPARC | 0x00000001)
+#define CONTEXT_FLOATING_POINT  (CONTEXT_SPARC | 0x00000002)
+#define CONTEXT_INTEGER         (CONTEXT_SPARC | 0x00000004)
+
+#define CONTEXT_FULL (CONTEXT_CONTROL | CONTEXT_FLOATING_POINT | CONTEXT_INTEGER)
+
+typedef struct _CONTEXT
+{
+    /* These are selected by CONTEXT_INTEGER */
+    DWORD g0;
+    DWORD g1;
+    DWORD g2;
+    DWORD g3;
+    DWORD g4;
+    DWORD g5;
+    DWORD g6;
+    DWORD g7;
+    DWORD o0;
+    DWORD o1;
+    DWORD o2;
+    DWORD o3;
+    DWORD o4;
+    DWORD o5;
+    DWORD o6;
+    DWORD o7;
+    DWORD l0;
+    DWORD l1;
+    DWORD l2;
+    DWORD l3;
+    DWORD l4;
+    DWORD l5;
+    DWORD l6;
+    DWORD l7;
+    DWORD i0;
+    DWORD i1;
+    DWORD i2;
+    DWORD i3;
+    DWORD i4;
+    DWORD i5;
+    DWORD i6;
+    DWORD i7;
+
+    /* These are selected by CONTEXT_CONTROL */
+    DWORD psr;
+    DWORD pc;
+    DWORD npc;
+    DWORD y;
+    DWORD wim;
+    DWORD tbr;
+
+    /* FIXME: floating point registers missing */
+
+} CONTEXT;
+
+#endif
+
 #if !defined(CONTEXT_FULL) && !defined(RC_INVOKED)
 #error You need to define a CONTEXT for your CPU
 #endif