Re: [PATCH] Accept DWARF 3-format debug info

[Daniel Jacobowitz <dan@codesourcery.com>]

On Thu, Jun 08, 2006 at 04:25:42PM -0700, Jim Blandy wrote:
> I think this patch is right.  It's true that GDB doesn't support all
> of DWARF 3, but GDB's general philosophy is to garner as much
> information as it can, and punt the rest, which works well with
> DWARF's philosophy.  So GDB shouldn't just punt entire compilation
> units because they're marked as DWARF 3.

I agree.

There seems to be one structural change in .debug_info tied to the
version number (there's also the initial lengths, but we already
support that).  That is:

References that use the attribute form DW_FORM_ref_addr are specified
to be four bytes in the DWARF 32-bit format and eight bytes in the
DWARF 64-bit format, while DWARF Version 2 specifies that such
references have the same size as anaddress on the target system (see
Sections 7.4 and 7.5.4).

I see two places (skip_one_die and read_attribute_value) that are
affected.  So, this should be an easy item to fix.

-- 
Daniel Jacobowitz
CodeSourcery