RFC: Change in dwarf2dbg using sizeof_offset

[Kai Tietz]

Hi,

has I noticed uses dwarf2dbg.c for TC_DWARF2_EMIT_OFFSET in some places 
the sizeof 4 bytes instead of sizeof_offset. This is a major problem for 
the w64 target, because section relative relocation have to be 64-bit 
wide, and there is no useful 32-bit relocation, which could handle this. I 
would suggest to change those dw2 types, like DW_AT_stmt_list and the 
arange to use sizeof_offset instead.
Is this already a bug, or is this a major change? I saw already comments 
about this issue in source code, too.

Cheers,
Kai

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