Re: [Libunwind-devel] problem with ms_abi on x86-64

[Arun Sharma]

On Tue, May 24, 2011 at 8:18 AM, <address@hidden> wrote:
>
> Summary
> =======
>
>  libunwind is not correctly unwinding through frames for
>  functions annotated with the __attribute__((ms_abi)).

The set of regs known to libunwind on x64 are in
include/libunwind_x86_64.h (look for x86_64_regnum_t). I'm not very
familiar with the microsoft calling conventions or gcc's
interpretation of it.

It looks like gcc is using dwarf regs 23-32 for xmm6-xmm15.  If all
you need to do is teach libunwind about these extra regs numbers in a
simple patch, we could consider it for the upcoming release. Anything
more complex is too late in the game.

 -Arun