[Bug gas/29559] gas generated incorrect debug info (top-level DW_TAG_unspecified_type DIE)

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29559

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Nick Clifton from comment #1)
> Hi Tom,
> 
>   [For the record the patch that introduced this bug was intended to fix PR
> 29517].
> 
> >  <0><100>: Abbrev Number: 3 (DW_TAG_unspecified_type)
> >  <0><101>: Abbrev Number: 1 (DW_TAG_compile_unit)
>  
> OK, so you are saying that the DW_TAG_unspecified_type is in the wrong place
> ?
> 

Yes.

> Presumably it should be after DW_TAG_subprogram.  IE, something like this:
> 
>  <0><101>: Abbrev Number: 1 (DW_TAG_compile_unit)
>     <102>   DW_AT_stmt_list   : 0x123
>     <106>   DW_AT_low_pc      : 0x4004ac
>     <10e>   DW_AT_high_pc     : 11
>     <10f>   DW_AT_name        : test2.s
>     <113>   DW_AT_comp_dir    : /home/vries/gdb_versions/devel
>     <117>   DW_AT_producer    : GNU AS 2.39.50
>     <11b>   DW_AT_language    : 32769   (MIPS assembler)
>  <1><11d>: Abbrev Number: 2 (DW_TAG_subprogram)
>     <11e>   DW_AT_name        : (indirect string, offset: 0x241): foo
>     <122>   DW_AT_external    : 1
>     <122>   DW_AT_type        : <0x133>
>     <123>   DW_AT_low_pc      : 0x4004ac
>     <12b>   DW_AT_high_pc     : 11
>  <1><133>: Abbrev Number: 3 (DW_TAG_unspecified_type)
> 
> I will try to fix this.  I originally placed the unspecified tag at the
> start of the CU information because I found that I could not otherwise
> compute the correct offset for it.  I will just have to try harder.

After the DW_TAG_compile_unit should also be fine.

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