dw> Here I elaborate on my point in calling libelf and libdwarf the APIs
dw> to nowhere using a detailed example.
...
dw> The p_offset field looks promising, but what is it an offset from
dw> *exactly*. Do I really just seek from the start of the file?
The semantics of the p_offset field is documented in a number
of places.
1. In the elf(5) manual page (in *BSD).
% man 5 elf
...
p_offset This member holds the offset from the beginning of the
file at which the first byte of the segment resides.
2. Chapter 4 of the "Libelf by Example" tutorial, both in the text and
in diagrams (figure 4.1)
3. Comments in the headers.
dw> Hmm, this is interesting. I think your comments are off by one: read
dw> each comment and pair it carefully with the name of its field. From
dw> common/elfdefinitions.h:
Fixed in r3077, thanks for the bug report.
dw> Libdwarf presents many more elaborate examples of the above
dw> situation, some of which I have yet to solve.
True. We need a guide to the libdwarf API in the short term.
For the long term it may be worth investing effort in designing a
cleaner API---perhaps after the 1.0 release.
Regards,
Joseph Koshy
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