Danny Backx escreveu:
> This is spooky.
> 
> I edited startup.c slightly, recompiled the cegcc.dll . And then,
> apparently, something went wrong. Not a single application built with
> cegcc wants to run any more, the mingw32ce stuff does still work.
> 


> warning: __init_c__: initted = 1
> warning: "WCETRACE" not found in registry
> warning: "WCETRACE_DEBUGGER" not found in registry
> gdb: unknown target exception 0x80000002 at 0x0174e718
> 
> Program received signal ?, Unknown signal.
> 0x0174e718 in ?? ()
> (gdb) 
> 
> Has anyone seen this before ? Any clues ?
> 

You are getting a STATUS_DATATYPE_MISALIGNMENT exception:

$grep 80000002 winbase.h
#define STATUS_DATATYPE_MISALIGNMENT 0x80000002

Errr, I should have remembered that gdb catches all the
system exceptions *before* the inferior, so it could be
easier to hack gdb than startup.c.  Check out
gdb/win32-nat.c:handle_exception on our svn, or 
gdb/gdbserver/win32-low.c:handle_exception on gdb cvs head.

On ARM, 32bit accesses have to be 32bit aligned.  Probably
more of a side effect of what you changed than the FPA
stuff you are after.
Anyway, hard to guess what you broke without seeing your
changes...

Cheers,
Pedro Alves


>       Danny
> 
> On Fri, 2007-04-13 at 20:15 +0100, Pedro Alves wrote:
>> Danny Backx wrote:
>>
>>> BTW, does anyone know how to trap events like these and get information
>>> on what went wrong ?
>>>
>>
>> SEH is one way.  Easier on eVC/MSVC since you have
>> __try/__catch/__finally there. With gcc you have to do it manually.
>> On ARM SEH is table based.  Take a look at
>> newlib/libc/sys/wince/crt0.S for an example.
>> Look for "kernel exception handler".  Probably easier is to
>> hack newlib/libc/sys/wince/startup.c:_eh_handler to dump the
>> exceptions.  That function is the top level handler on cegcc.
>> On mingw32ce there isn't any top level SEH handler installed.
>>
>> Cheers,
>> Pedro Alves
>>



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