[Bug 846] New: DWARF Comments #2

Comments from Mark Kettenis: 
 
There are some important bits missing from the DWARF-inspired 
exception handling section: the mapping between register/column 
numbers and actual registers/register names isn't specified.  Of 
course these are architecture-specific, but they really should be 
documented, otherwise  
 
I noticed that DW_CFA_GNU_window_save isn't documented; probably fine 
since it's somewhat SPARC-specific and LSB doesn't seem to cover that 
architecture.  The DW_CFA_GNU_args_size is very cryptic; I don't 
understand what it is supposed to be used for. 
 
The documentation on the CIE pointer for FDE's is unclear: 
 
   This value shall never be 0, which indicates this record is a FDE. 
 
When I first read this I thought that the value 0 would indicate that 
the record is an FDE, but that's not what it is trying to say.   
 
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