[Dwarf-discuss] "null entry"
Bishop, John E
Mon May 23 16:05:19 PDT 2005
I therefore propose that this be made clearer in the
document, and make these changes
o An index hit for "null entry", pointing to section
7.5.2 (p 118).
o Add some text along these lines before the second
paragraph in 7.5.2:
A null entry is a debugging information entry
whose abbreviation code is 0. This entry has no
Null entries are used for purposes such as
ending a list of sibling nodes. They can also
be used for padding because on some architectures...
I'll agree with the poster who said it was a pain to
have zero not work as a null sibling pointer. But there's
Since the value of SW_AT_sibling is a reference, and a
reference is an offset from a .debug_info section (this one
or a remote one), zero would normally mean "the first DIE".
So producers could issue a null DIE as the very first DIE,
and then zero works! (or have I misunderstood something?)
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