1.1 --- a/src/sh4/ia32abi.h	Mon Jul 14 07:44:42 2008 +0000
     1.2 +++ b/src/sh4/ia32abi.h	Sat Oct 25 12:36:42 2008 +0000
     1.3 @@ -264,6 +264,46 @@
     1.4      }
     1.5  }
     1.6  
     1.7 +/**
     1.8 + * The unwind methods only work if we compiled with DWARF2 frame information
     1.9 + * (ie -fexceptions), otherwise we have to use the direct frame scan.
    1.10 + */
    1.11 +#ifdef HAVE_EXCEPTIONS
    1.12 +#include <unwind.h>
    1.13 +
    1.14 +struct UnwindInfo {
    1.15 +	int have_result;
    1.16 +	void *pc;
    1.17 +};
    1.18 +
    1.19 +_Unwind_Reason_Code xlat_check_frame( struct _Unwind_Context *context, void *arg )
    1.20 +{
    1.21 +    void *ebp = (void *)_Unwind_GetGR(context, 5);
    1.22 +    void *expect = (((uint8_t *)&sh4r) + 128 );
    1.23 +	struct UnwindInfo *info = arg;
    1.24 +    if( ebp == expect ) { 
    1.25 +        info->have_result = 1;
    1.26 +        info->pc = (void *)_Unwind_GetIP(context);
    1.27 +    } else if( info->have_result ) {
    1.28 +        return _URC_NORMAL_STOP;
    1.29 +    }
    1.30 +
    1.31 +    return _URC_NO_REASON;
    1.32 +}
    1.33 +
    1.34 +void *xlat_get_native_pc()
    1.35 +{
    1.36 +    struct _Unwind_Exception exc;
    1.37 +    struct UnwindInfo info;
    1.38 +
    1.39 +    info.have_result = 0;
    1.40 +    void *result = NULL;
    1.41 +    _Unwind_Backtrace( xlat_check_frame, &info );
    1.42 +    if( info.have_result )
    1.43 +    	return info.pc;
    1.44 +    return NULL;
    1.45 +}
    1.46 +#else 
    1.47  void *xlat_get_native_pc()
    1.48  {
    1.49      void *result = NULL;
    1.50 @@ -286,6 +326,7 @@
    1.51          : "eax", "ecx", "edx" );
    1.52      return result;
    1.53  }
    1.54 +#endif
    1.55  
    1.56  #endif /* !lxdream_ia32abi_H */
    1.57