[patch] C6X unwinding/exception handling

Matthias Klose doko@ubuntu.com
Mon Oct 17 11:01:00 GMT 2011


On 10/10/2011 02:23 PM, Paul Brook wrote:
>> Index: libjava/exception.cc
>> ===================================================================
>> --- libjava/exception.cc	(revision 179739)
>> +++ libjava/exception.cc	(working copy)
>> @@ -135,6 +135,7 @@
>>  {
>>    _Unwind_Ptr Start;
>>    _Unwind_Ptr LPStart;
>> +  _Unwind_Ptr ttype_base;
>>    const unsigned char *TType;
>>    const unsigned char *action_table;
>>    unsigned char ttype_encoding;
>> @@ -184,7 +185,7 @@
>>    _Unwind_Ptr ptr;
>>
>>    ptr = (_Unwind_Ptr) (info->TType - (i * 4));
>> -  ptr = _Unwind_decode_target2(ptr);
>> +  ptr = _Unwind_decode_typeinfo_ptr (info->ttype_base, (_Unwind_Word)
>> ptr);
>>
>>    return reinterpret_cast<void **>(ptr);
>>  }
>> @@ -325,6 +326,7 @@
>>
>>    // Parse the LSDA header.
>>    p = parse_lsda_header (context, language_specific_data, &info);
>> +  info.ttype_base = base_of_encoded_value (info.ttype_encoding, context);
>>  #ifdef HAVE_GETIPINFO
>>    ip = _Unwind_GetIPInfo (context, &ip_before_insn);
>>  #else
> 
> No.  The purpose of my patch was to remove the arm specific code.
> 
> The only difference I can see in this bit of code is that libstdc++ uses 
> base_of_encoded_value/read_encoded_value_with_base whereas libjava uses 
> context/read_encoded_value.
> 
> I expect you want something like the patch below (completely untested).

I checked the attached patch, test results at
http://gcc.gnu.org/ml/gcc-testresults/2011-10/msg01377.html

which are the same as with my suggested patch.

Ok for the trunk?

 Matthias
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