On 01/05/2010 06:53 AM, Oman Nadeem wrote:
>
> ----------------------------------------
>> Date: Fri, 1 Jan 2010 16:28:27 +0000
>> From: aph@xxxxxxxxxx
>> On 01/01/2010 02:43 PM, Oman Nadeem wrote:
>>
>>> I am having a problem with exception handling for C++ on GNU PPC
>>> Tools (MPC8xx platform).
>>>
>>> When I call "throw" from "try" block in my test application to raise
>>> an exception the control goes in the following way and traps into
>>> "abort" on returning NULL from _Unwind_Find_FDE function.
>>>
>>> __cxa_throw
>>> __Unwind_RaiseException
>>> uw_init_context_1
>>> uw_frame_state_for
>>> Unwind_Find_FDE ("seen_objects" and "unseen_objects" are NULL so return NULL)
>>> Am I missing any switch or initialization related to c++/exception
>>> handling?
>>
>> No, this is one of the things that should "just work". As long as
>> you're compling with g++, the right libraries and compile options will
>> be selected by default. It may be that you have an incompatible set
>> of libraries installed, or that your compiler is broken.
>
> Thank for prompt reply.
>
> Is Unwind approach for exception handling is target specific?
Somewhat, yes.
> If yes then which switches are required to build tools libraries and
> which libraries are required for unwinding support on PPC32?
It depends. Usually, everything you need will be in libgcc, but it
sometimes is shared with glibc.
> Currently I am linking with libstdc++.a, libgcc.a, libc.a. And can
> I use setjump/longjump approach for exception handling? If yes then
> which defines are required to build tools libraries for this
> approach?
I don't know if sj/lj works on your target.
Why all this is broken for you depends on:
* Your target OS.
* How you built gcc.
* Your target binutils
In general this does work on PPC.
Andrew.
