[Dwarf-Discuss] Doubts in DWARF spec 4

Malu Sasi malu.sasi at nestgroup.net
Mon Nov 11 19:15:18 PST 2013


Hi All,

We are having some doubts while building elf's using new GCC (4.8.1) with DWARF-4. When we build elfs with "-gdwarf-4", and analyzed the parsed details using "readelf", 

1. It was seen that the ".debug_line" section always shows the version as "2". But from Appendix F of DWARF 4 spec(page 289, figure 97), we expect it to be "4". Can anyone please clarify why version number of ".debug_line" section is "2" instead of "4". Is it that we need to manually add some other option while building elf?

2. Also, the new section ".debug_types"  was not there, when the elf was built with option "-fdebug-types-section".  We were using a simple CPP program without any structures/enum etc in it. Could this be the reason?


Expecting your swift response....


Regards,
Malu


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