libgcc-std.ver (_Unwind_GetCFA): New.

        * libgcc-std.ver (_Unwind_GetCFA): New.
        * unwind-dw2.c (_Unwind_GetCFA): New.
        * unwind-libunwind.c (_Unwind_GetCFA): New.
        * unwind-sjlj.c (_Unwind_GetCFA): New.
        * unwind.h: Declare it.

From-SVN: r65190

gcc/ChangeLog

+2003-04-02  Richard Henderson  <rth@redhat.com>
+
+	* libgcc-std.ver (_Unwind_GetCFA): New.
+	* unwind-dw2.c (_Unwind_GetCFA): New.
+	* unwind-libunwind.c (_Unwind_GetCFA): New.
+	* unwind-sjlj.c (_Unwind_GetCFA): New.
+	* unwind.h: Declare it.
+
 Thu Apr  3 00:31:21 CEST 2003  Jan Hubicka  <jh@suse.cz>
 
 	PR inline-asm/8088

gcc/libgcc-std.ver

@@ -179,6 +179,7 @@ GCC_3.0 {
 %inherit GCC_3.3 GCC_3.0
 GCC_3.3 {
   _Unwind_FindEnclosingFunction
+  _Unwind_GetCFA
 }
 
 %inherit GCC_3.4 GCC_3.3

gcc/unwind-dw2.c

@@ -173,6 +173,14 @@ _Unwind_GetGR (struct _Unwind_Context *context, int index)
   return * (_Unwind_Word *) context->reg[index];
 }
 
+/* Get the value of the CFA as saved in CONTEXT.  */
+
+_Unwind_Word
+_Unwind_GetCFA (struct _Unwind_Context *context)
+{
+  return context->cfa;
+}
+
 /* Overwrite the saved value for register REG in CONTEXT with VAL.  */
 
 inline void

gcc/unwind-libunwind.c

@@ -105,6 +105,15 @@ _Unwind_GetGR (struct _Unwind_Context *context, int index)
   return ret;
 }
 
+/* Get the value of the CFA as saved in CONTEXT.  */
+
+_Unwind_Word
+_Unwind_GetCFA (struct _Unwind_Context *context)
+{
+  /* ??? Is there any way to get this information?  */
+  return NULL;
+} 
+
 /* Overwrite the saved value for register REG in CONTEXT with VAL.  */
 
 void

gcc/unwind-sjlj.c

@@ -170,6 +170,15 @@ _Unwind_GetGR (struct _Unwind_Context *context, int index)
   return context->fc->data[index];
 }
 
+/* Get the value of the CFA as saved in CONTEXT.  */
+
+_Unwind_Word
+_Unwind_GetCFA (struct _Unwind_Context *context)
+{
+  /* ??? Ideally __builtin_setjmp places the CFA in the jmpbuf.  */
+  return NULL;
+}
+
 void
 _Unwind_SetGR (struct _Unwind_Context *context, int index, _Unwind_Word val)
 {

gcc/unwind.h

@@ -138,6 +138,9 @@ extern void _Unwind_SetGR (struct _Unwind_Context *, int, _Unwind_Word);
 extern _Unwind_Ptr _Unwind_GetIP (struct _Unwind_Context *);
 extern void _Unwind_SetIP (struct _Unwind_Context *, _Unwind_Ptr);
 
+/* @@@ Retrieve the CFA of the given context.  */
+extern _Unwind_Word _Unwind_GetCFA (struct _Unwind_Context *);
+
 extern void *_Unwind_GetLanguageSpecificData (struct _Unwind_Context *);
 
 extern _Unwind_Ptr _Unwind_GetRegionStart (struct _Unwind_Context *);