[PATCH] Initial support for parsing DWARF CFI in DebugInfo and dumping it in llvm-dwarfdump

[Eric Christopher]

If you can split up the AddressSize/PointerSize part of the patch into
something separate that'd be good. Also formatting and I think 80-column
violations.

Otherwise looks fine.

-eric

On Tue, Feb 5, 2013 at 2:47 PM, Eli Bendersky <eliben at google.com> wrote:

> The attached patch is the first step for adding DWARF CFI parsing and
> dumping support to LLVM's tools.
>
> What it does:
>
> * Parses the .debug_frame section, obtaining the CIE and FDE headers
> * Dumping those in a readelf-compatible format for the llvm-dwarfdump tool
>
> What it doesn't do yet:
>
> * No support for .eh_frame, only .debug_frame
> * Doesn't decode actual instructions, only entry headers
>
> This is something that can (and should) be developed incrementally, so
> once the initial patch gets accepted and committed, more features can
> be added. Even in its initial form it can already allow some tests to
> be written more naturally with llvm-dwarfdump. Note that I didn't
> include tests in the patch - I'll add them once the general direction
> is approved.
>
> Eli
>
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