Description of .eh_frame/.gcc_except_table contents?

[Stephan Bergmann]

Hi all.

I think I ran into a misoptimization in gcc 3.4.1/2 on Linux x86 that 
causes a thrown exception not to be caught by a "catch(...)" (works with 
-O0 but not with -O2).  To analyze this a little further, I would be 
interested in documentation of the generated .eh_frame and 
.gcc_except_table data---is there a document that describes this, or at 
least a header file that includes appropriate struct definitions?

Any help would be appreciated,
-Stephan