https://sourceware.org/bugzilla/show_bug.cgi?id=29451
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
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CC| |mark at klomp dot org
--- Comment #2 from Mark Wielaard <mark at klomp dot org> ---
(In reply to Sergei Trofimovich from comment #0)
> Discovered in https://sourceware.org/PR29450 where gas-2.38 did not attach
> 0-sized DIE for glibc's _init assembly-written function and gas-2.39 did.
>
> <1><22>: Abbrev Number: 2 (DW_TAG_subprogram)
> <23> DW_AT_name : (strp) (offset: 0x49): _init
> <27> DW_AT_external : (flag) 1
> <28> DW_AT_low_pc : (addr) 0x0
> <2c> DW_AT_high_pc : (addr) 0x0
>
> Would it be fair to say it's a bug to assign zero size here via DW_AT_low_pc
> / DW_AT_high_pc?
Yes it is clearly a bug. Both low_pc and high_pc are invalid values.
The definition of low_pc/high_pc is:
The value of the DW_AT_low_pc attribute is the address of the first
instruction associated with the entity.
If the value of the DW_AT_high_pc is of class address, it is the address of
the first location past the last instruction associated with the entity;
So this doesn't even describe a valid contiguous range.
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