Build support for s390x: PAL layer #53287

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marek-safar merged 1 commit into dotnet:main from uweigand:s390x-clr-pal

Jun 8, 2021

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uweigand commented May 26, 2021

Add PAL implementation for Linux on s390x
Define BIGENDIAN on s390x when compiling coreclr
Do not run HAVE_FUNCTIONAL_PTHREAD_ROBUST_MUTEXES cmake test when
cross-compiling

Note to reviewers:

The primary intent of this patch is to enable building ilasm/ildasm on s390x (even though we do not support coreclr VM/JIT)
However, the PAL support provided here is still complete and passes all paltests
As there is no Windows on s390x, there is no pre-existing CONTEXT structure, so I made one up. In particular, the CONTEXT_S390X define re-uses the same value as CONTEXT_AMD64. Let me know if I should instead choose another bit.
Similarly, there is no s390x PE file format, so IMAGE_FILE_MACHINE_NATIVE is defined to IMAGE_FILE_MACHINE_UNKNOWN

ghost added the area-PAL-coreclr label

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AaronRobinsonMSFT commented May 26, 2021

janvorli reviewed

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src/coreclr/pal/src/configure.cmake Outdated

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janvorli May 26, 2021

This is never executed while cross compiling, cmake skips all check_*_source_runs during cross compilation. The HAVE_xxx values for cross compilation are taken from the tryrun.cmake file. So this change should not be needed, but you'll need to update the eng/native/tryrun.cmake

Contributor Author

uweigand May 27, 2021

Ah, I missed that, sorry. Patch updated accordingly.

src/coreclr/pal/src/thread/context.cpp Outdated Show resolved Hide resolved

src/coreclr/inc/pedecoder.h Outdated Show resolved Hide resolved

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FileSystemWatcher_DirectorySymbolicLink_TargetsFile_Fails #53366

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uweigand commented Jun 7, 2021

Ping? Anything else that needs to be addressed?

janvorli reviewed

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janvorli Jun 7, 2021

I have just noticed this #if has a wrong condition (event before your change). Since you are touching this code, could you please fix it? It should be

#if (HAVE_GREGSET_T || HAVE___GREGSET_T) && !defined(HOST_S390X)

Actually, the related #endif comment need to be updated to match your change (and this fix) to

#endif // HAVE_GREGSET_T || HAVE___GREGSET_T || !HOST_S390X

Contributor Author

uweigand Jun 7, 2021

Fixed.

src/coreclr/pal/src/thread/context.cpp Outdated

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janvorli Jun 7, 2021

Can you please update the matching @endif comment?

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uweigand Jun 7, 2021

Done.

janvorli reviewed

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janvorli Jun 7, 2021

A nit - in the #endif comments, the convention we use is just !HOST_S390X instead of !defined(HOST_S390X)

Contributor Author

uweigand Jun 7, 2021

Ah, I see. Updated.


          Build support for s390x: PAL layer

* Add PAL implementation for Linux on s390x

* Define BIGENDIAN on s390x when compiling coreclr

* Provide a default HAVE_FUNCTIONAL_PTHREAD_ROBUST_MUTEXES_EXITCODE
  value in eng/native/tryrun.cmake

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janvorli left a comment

LGTM, thank you!

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ghost commented Jun 7, 2021

Hello @janvorli!

Because this pull request has the auto-merge label, I will be glad to assist with helping to merge this pull request once all check-in policies pass.

p.s. you can customize the way I help with merging this pull request, such as holding this pull request until a specific person approves. Simply @mention me (`@msftbot`) and give me an instruction to get started! Learn more here.

Contributor Author

uweigand commented Jun 7, 2021

Thanks for the review! Would you mind having a look the two related PRs as well:
#53286
#53289
Both are required to get the PAL to actually build on s390x.

marek-safar merged commit 5d6278a into dotnet:main

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uweigand deleted the s390x-clr-pal branch

July 14, 2021 22:32

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area-PAL-coreclr