[Nasm-devel] Add Codeview 8 Support

[Jim K. <jam...@li...>]

Hi Folks,

This patchset adds support for the Codeview 8 debug format for PE/COFF files.

The first two patches in this set lay the groundwork for the third. The first
patch adds a utility function for converting a relative path to an absolute
path, because Codeview wants absolute paths.  Codeview stores an MD5 hash of
the source file, so the second patch adds an implementation that's in the
public domain.

All of the interesting bits in the third patch are in codeview.c. Prior to this
patch, COFF hadn't supported a debug format, so the debugs hooks weren't hooked
up, nor were the necessary bits exposed external to outcoff.c.
As a result, there's an ugly part of the diff for outcoff.c/pecoff.h that hooks
up the debug calls, exports some definitions and variables, and renames the
exported stuff to avoid collisions, e. g., Symbol -> coff_Symbol. I can roll
the ugly part into its own patch if it really bothers people.

So far, I've tested this in WinDbg for both 32- and 64-bit code. 

For more information on the Codeview 8 format, see https://github.com/yasm/yasm/blob/master/modules/dbgfmts/codeview/cv8.txt

Let me know what you think. 

Thanks.

--
Jim Kukunas
Intel Open Source Technology Center