DJ Delorie <[EMAIL PROTECTED]> writes: > > The EH code does seem to use POINTER_SIZE pretty consistently. > > DWARF2_ADDR_SIZE is for the debug info, not the exception frame > > info. I haven't looked into the history of why this is so. > > Hmmm... I suppose the EH info is used by the runtime as well, right? > So changing to a non-standard addr size complicates the unwinder.
Certainly if you use DW_EH_PE_absptr the compiler, the unwinder library, and the binutils all must agree on the size that that means. On the other hand, if you define ASM_PREFERRED_EH_DATA_FORMAT the encoding will be recorded in the FDE and CIE, and there will be no possible confusion by any tool. I actually think that is normally the best choice, especially for a target for which confusion is possible. Lots of targets define ASM_PREFERRED_EH_DATA_FORMAT, it's not unusual. Ian
