RFR: 8168503 JEP 297: Unified arm32/arm64 Port

[Bob Vandette]

> On Dec 2, 2016, at 8:04 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
> 
> hi Bob,
> 
> I would suggest to have separate webrevs for different repositories because different groups should look on them.

There are only 3 non hotspot files and they are on top.  Forwarding to build-dev for their review.

> 
> For example, top repository and makefiles changes should be also reviewed on build-dev at openjdk.java.net
> 
> Why do you need cahnges in SA libproc.h?

The cross compilation toolchains we use do not define user_regs_struct or user_pt_regs.

I just looked again and there is a definition of struct user_regs in user.h.  I might be able to change the code to:

#if defined(arm) || defined(arm64)
#define user_regs_struct user_regs
#endif

This change would result  in the exact same declaration based on the number of registers
derived from the structure in user.h. 

Bob.


> 
> I saw Hotspot changes before and I think they are fine (did not dive deep).
> 
> Thanks,
> Vladimir
> 
> On 12/2/16 12:28 PM, Bob Vandette wrote:
>> Please review the proposed changes to be integrated under JEP 297.
>> 
>> Summary:
>> 
>> This JEP adds arm32 and arm64 Linux platform support to OpenJDK for JDK 9.
>> 
>> This changeset also removes the support for the pregenerated interpreter since
>> this is no longer supported.
>> 
>> The addition of arm64 does not replace the existing aarch64 port.  A new configure
>> option (-with-cpu-port=) allows for the selection of the existing aarch64 versus the
>> 64-bit arm64 support being added via this JEP.  Please refer to the JEP for more details.
>> 
>> JEP 297:
>> 
>> https://bugs.openjdk.java.net/browse/JDK-8168503
>> 
>> Webrev:
>> 
>> http://cr.openjdk.java.net/~bobv/8168503
>> 
>> 
>> Note:
>> 
>> A complete build-able forest containing these changes is located here: http://hg.openjdk.java.net/aarch32-port/jdk9-arm3264
>> 
>> Thanks,
>> Bob Vandette
>>