Re: Avoid potential crashes with --gc-sections and low addresses

[Jonathan Larmour <jifl@eCosCentric.com>]

Daniel Jacobowitz wrote:
> On Fri, Jun 27, 2008 at 04:37:50PM +0100, Jonathan Larmour wrote:
>> --- gdb/dwarf2-frame.c~	2008-05-04 00:24:17.000000000 +0100
>> +++ gdb/dwarf2-frame.c	2008-06-20 17:06:04.000000000 +0100
>> @@ -1795,7 +1795,8 @@ decode_frame_entry_1 (struct comp_unit *
>>  
>>        fde->eh_frame_p = eh_frame_p;
>>  
>> -      add_fde (unit, fde);
>> +      if (fde->initial_location)
>> +          add_fde (unit, fde);
>>      }
>>  
>>    return end;
> 
> This won't work if there is code actually at zero.  Take a look at the
> .debug_info reader to see how we handled this case for symbolic debug info.

I've had a look, and got lost in a twisty maze of passages. The learning
curve for that stuff is probably steeper than I can manage at the moment.
If you don't mind, in that case I'll submit it to GNATS so it isn't lost.

Jifl
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