Add support for pre-compiling interop type maps in crossgen2#124352

Draft

jkoritzinsky wants to merge 15 commits intodotnet:mainfrom

jkoritzinsky:typemap-r2r

Commits on Feb 14, 2026

Add support to the ReadyToRun format for an R2R variant of the type map format and move NativeAOT to use the same R2R section identifier for its Type Map support
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Rename HeaderNode to ReadyToRunHeaderNode to provide better support for sharing between NativeAOT and R2R.
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Move TypeMapManager to the shared partition
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Use SortableDependencyNode as the base type
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Hook up support for emitting type map entries in R2R
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Add support for precaching assembly target lookup and refactor R2R integration for type maps generally
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Add verification of CallbackContext struct layout
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Get the code to the point of loading the R2R image.
jkoritzinsky
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Fix inverted logic on assembly target parsing
jkoritzinsky
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Basic PR feedback
jkoritzinsky
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Use a new section to store the data for each hash table to avoid issues with negative offsets. Fix issues in handling invalid maps. Fix an issue in R2RModuleSignature (though that approach may stil…
jkoritzinsky
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Use the right compressed integer format (we have two)
jkoritzinsky
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Update r2rdump to handle the assembly ref we add now in a non-composite scenario
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zero-initialize returns for the non-r2r case
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Fix typo
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