ntdll: Implement set_cpu_context for ARM64 (try 2)

[Martin Storsjö]

On Wed, 20 Sep 2017, André Hentschel wrote:

> Signed-off-by: André Hentschel <nerv at dawncrow.de>
> ---
> dlls/ntdll/signal_arm64.c | 41 +++++++++++++++++++++++++++++++++++++----
> 1 file changed, 37 insertions(+), 4 deletions(-)

Now that you're implementing this, I think it'd make sense to complete the 
arm64 CONTEXT struct (compared to the win10 sdk); our version is lacking 
the float registers (and debug registers) at the end, when compared with 
the version of the struct in the public SDK. And contrary to ARM, support 
for the float registers is on by default in all toolchains, so there's no 
combination where one would be building wine for arm64 where that wouldn't 
work.

Our version also defines the X registers slightly differently, the public 
SDK uses an union that allows accessing them both via member names and via 
an array - although it should end up as the same binary representation. I 
haven't sent any patch for bringing this up to date yet since I wasn't 
touching this area yet.

// Martin