[ARM64] Use PT_KNONVOLATILE... for cross

[sdmaclea]

In order to enable cross compilation support, ARM64
needs to use PT_KNONVOLATILE_CONTEXT_POINTERS

@janvorli @jashook

[sdmaclea]

For comparison, arm32 vs. arm64 with change

src/unwinder/arm/unwinder_arm.cpp:        PT_KNONVOLATILE_CONTEXT_POINTERS ContextPointers = (Params)->ContextPointers; \
src/unwinder/arm/unwinder_arm.cpp:        PT_KNONVOLATILE_CONTEXT_POINTERS ContextPointers = (Params)->ContextPointers; \
src/unwinder/arm/unwinder_arm.cpp:    PT_KNONVOLATILE_CONTEXT_POINTERS ContextPointers;
src/unwinder/arm/unwinder_arm.cpp:    __inout_opt PT_KNONVOLATILE_CONTEXT_POINTERS ContextPointers
src/unwinder/arm64/unwinder_arm64.cpp:    PT_KNONVOLATILE_CONTEXT_POINTERS ContextPointers;
src/unwinder/arm64/unwinder_arm64.cpp:        PT_KNONVOLATILE_CONTEXT_POINTERS ContextPointers = (Params)->ContextPointers; \
src/unwinder/arm64/unwinder_arm64.cpp:        PT_KNONVOLATILE_CONTEXT_POINTERS ContextPointers = (Params)->ContextPointers; \
src/unwinder/arm64/unwinder_arm64.cpp:    IN OUT PT_KNONVOLATILE_CONTEXT_POINTERS ContextPointers OPTIONAL

This compiles natively on arm64 Ubuntu
This cross compiles for arm64 on amd64 Ubuntu.

Hello World works. I will run more extensive regression....

[jashook]

@dotnet-bot test Windows_NT x64 Debug Build and Test

[jashook]

@dotnet-bot test Linux ARM Emulator Cross Debug Build

[jashook]

@dotnet-bot test Windows_NT Arm64 Debug Build and Test

[jashook]

@dotnet-bot test Windows_NT Arm64 Checked Build and Test

[jashook]

@dotnet-bot test Windows_NT arm64 Cross Debug Build

[jashook]

LGTM

[jashook]

@sdmaclea thank you for the work. Hopefully the testing comes back clean.

[jashook]

Windows Arm64 failed, however, seems like it may be unrelated.

20:50:23 TestID: UnmanagedToManaged.cmd_107
20:50:23 Path  : baseservices/exceptions/regressions/V1/SEH/VJ/UnmanagedToManaged/UnmanagedToManaged.cmd
20:50:23 
20:50:23 Started: Fri Feb 17 20:09:16 2017
20:50:23 Started: Fri Feb 17 20:09:18 2017
20:50:23 Output: TEST_CMD_LINE: baseservices\exceptions\regressions\V1\SEH\VJ\UnmanagedToManaged> C:\Users\DDJOIN\arm64_ci\tests\baseservices\exceptions\regressions\V1\SEH\VJ\UnmanagedToManaged\UnmanagedToManaged.cmd 
20:50:23 BEGIN EXECUTION
20:50:23  "C:\Users\DDJOIN\arm64_ci\tests\Tests\Core_Root\corerun.exe" UnmanagedToManaged.exe 
20:50:23 Calling unmanaged code...
20:50:23 Caught a div-by-zero exception.
20:50:23 
Assert failure(PID 16256 [0x00003f80], Thread: 7464 [0x1d28]): false
20:50:23 CORECLR! GetCLRRuntimeHost + 0x1A5E6C (0x00007fff`8a22910c)
20:50:23 CORECLR! GetCLRRuntimeHost + 0x19DAB4 (0x00007fff`8a220d54)
20:50:23 CORECLR! GetCLRRuntimeHost + 0x1A734C (0x00007fff`8a22a5ec)
20:50:23 NTDLL! chkstk + 0x1CC (0x00007fff`ae1a306c)
20:50:23 NTDLL! RtlUnwindEx + 0x258 (0x00007fff`ae22f5c8)
20:50:23 CORECLR! GetCLRRuntimeHost + 0x19ADA8 (0x00007fff`8a21e048)
20:50:23 CORECLR! GetCLRRuntimeHost + 0x1A7208 (0x00007fff`8a22a4a8)
20:50:23 NTDLL! chkstk + 0x14C (0x00007fff`ae1a2fec)
20:50:23 NTDLL! RtlLogStackBackTrace + 0x370 (0x00007fff`ae22f160)
20:50:23 NTDLL! RtlRaiseException + 0xC0 (0x00007fff`ae2303d0)
20:50:23     File: d:\j\workspace\arm64_cross_c---f41ee988\src\vm\exceptionhandling.cpp Line: 441
20:50:23     Image: C:\Users\DDJOIN\arm64_ci\tests\Tests\Core_Root\CoreRun.exe
20:50:23 Expected: 100
20:50:23 Actual: 123456789
20:50:23 END EXECUTION - FAILED
20:50:23 FAILED

[jashook]

@dotnet-bot test Windows_NT Arm64 Checked Build and Test

[sdmaclea]

Arm64/Unix looks relatively clean. There are 4 unexpected failures. They look related to generics. I do not think it has anything to do with this patch.

[jashook]

I think it is worth merging and taking the regression to fix the build. After all we cannot prove this pr causes the test failure, it could have been #9500 or any checkin past then.

@RussKeldorph @janvorli ptal and merge if you agree.

[gkhanna79]

@rahku Are you good with this change to unblock the Arm64 pipe build?

[AndyAyersMS]

CoreCLR bits in CoreFX are now 4 days old and we need to unblock the builds. I'm going to merge this PR soon unless anyone strenuously objects.

[gkhanna79]

I have merged it.