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NativeAOT/Windows/Arm64: Add TLS inline support #104282

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merged 13 commits into from
Jul 3, 2024
Merged

NativeAOT/Windows/Arm64: Add TLS inline support #104282

merged 13 commits into from
Jul 3, 2024

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kunalspathak
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The relocation for TLS variable is done by emitting a pair of add instructions in the following format:

add         x1,x1,tls_InlinedThreadStatics,lsl #0xC
add         x1,x1,tls_InlinedThreadStatics

The relocations are recorded as follows:

 00000030  SECREL_HIGH12A             91400021        62  tls_InlinedThreadStatics
 00000034  SECREL_LOW12L              91000021        62  tls_InlinedThreadStatics

The final disassembly looks like:

00007FF6B7AFA6E4  ldr         x0,[xpr,#0x58]  
00007FF6B7AFA6E8  adrp        x1,WKS::gc_heap::generation_table+420h (07FF6B7BFD000h)  
00007FF6B7AFA6EC  add         x1,x1,#0x2CC  
00007FF6B7AFA6F0  ldr         w1,[x1]  
00007FF6B7AFA6F4  ldr         x0,[x0,x1 lsl #3]  
00007FF6B7AFA6F8  add         x1,x1,#0,lsl #0xC  
00007FF6B7AFA6FC  add         x1,x1,#4

Contributes to #79521

@kunalspathak
working with 1 change remaining
12fa9bc 
hack to test

some fixes

almost trhere

fix assert

Some comments and revert sample Program

some renaming

Revert changes for IF_DI_1E

format IF_DI_2A code:

Format emitIns_Add_Add_Tls_Reloc

Fixed the code in IF_DI_2A
@kunalspathak
revert changes in reproNative.vcxproj
a1f1738
@dotnet-issue-labeler dotnet-issue-labeler bot added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Jul 2, 2024
@kunalspathak kunalspathak mentioned this pull request Jul 2, 2024
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@kunalspathak kunalspathak requested a review from jkotas July 2, 2024 04:12
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@dotnet/jit-contrib

@kunalspathak kunalspathak changed the title Windows/Arm64: Adds TLS inline support NativeAOT/Windows/Arm64: Add TLS inline support Jul 2, 2024
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I forgot to update the guid. Will do it once i see some superpmi diff runs for JIT arm64, because I changed a code in lowering.

@kunalspathak kunalspathak requested a review from VSadov July 2, 2024 15:37
jakobbotsch
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JIT side LGTM with some nits.

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@jkotas @VSadov - this is ready again. Let me know if you have more feedback.

VSadov
VSadov reviewed Jul 2, 2024
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src/coreclr/tools/Common/JitInterface/CorInfoImpl.cs
@@ -3909,6 +3909,8 @@ private static RelocType GetRelocType(TargetArchitecture targetArchitecture, ush
const ushort IMAGE_REL_ARM64_BRANCH26 = 3;
const ushort IMAGE_REL_ARM64_PAGEBASE_REL21 = 4;
const ushort IMAGE_REL_ARM64_PAGEOFFSET_12A = 6;
const ushort IMAGE_REL_ARM64_SECREL_HIGH12A = 0xA;
const ushort IMAGE_REL_ARM64_SECREL_LOW12L = 0xB;
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@VSadov VSadov Jul 2, 2024 •
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Nit: some constants here match values from RelocType and some match the actual platform-specific values (for the ease of disassembling?).

If that is a case, then maybe always use platform-specific values?
I.E. IMAGE_REL_ARM64_TLSDESC_CALL would match R_AARCH64_TLSDESC_CALL, which is 0x239

Or the other way - just use RelocType values for all?

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Does not need to be addressed in this change since the inconsistency is already there.

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yeah, probably will not include in this PR.

@kunalspathak @jkotas
Update src/coreclr/tools/Common/Compiler/DependencyAnalysis/Relocatio…
565f2d7 
…n.cs

Co-authored-by: Jan Kotas <jkotas@microsoft.com>
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LGTM!! Thanks!!

@kunalspathak kunalspathak merged commit f92499d into dotnet:main Jul 3, 2024
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@kunalspathak kunalspathak deleted the tls-win-arm64 branch July 3, 2024 05:03
This was referenced Jul 4, 2024
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@jakobbotsch jakobbotsch jakobbotsch approved these changes

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