[Bug gas/27688] gas does not support .secidx pseudo-directive

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27688

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |hjl.tools at gmail dot com

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Mark Harmstone from comment #0)
> Created attachment 13345 [details]
> secidx patch
> 
> llvm-mc has a pseudo-directive .secidx for COFF files, which maps to a
> IMAGE_REL_I386_SECTION / IMAGE_REL_AMD64_SECTION relocation entry. This is a
> two-byte field which gets set to the section index of a label when it's
> linked.
> 
> This is necessary for support for CodeView / PDB debugging, as addresses are
> represented by a two-byte section index and a four-byte offset (i.e. a
> .secidx and a .secrel32). See also my CodeView patches to the gcc mailing
> list, which rely on this to work.
> 
> I've attached a patch, which implements this for x86 and amd64.

Such patch needs both assembler and linker tests.  Do you have copyright
paper with the FSF?

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