mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-06 17:00:19 +02:00
Tony Wasserka
af645cb750
The guest_layout wrapper provides an architecture-agnostic representation of the guest data layout of each struct used in a thunked library. A constructor is added to host_layout to allow conversion of the data to the host layout. For types that are already fully compatible, both layout wrappers are simple type aliases to minimize overhead.
37 lines
1.4 KiB
C++
37 lines
1.4 KiB
C++
namespace fexgen {
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struct returns_guest_pointer {};
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struct custom_host_impl {};
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struct custom_guest_entrypoint {};
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struct generate_guest_symtable {};
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struct indirect_guest_calls {};
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struct callback_annotation_base {
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// Prevent annotating multiple callback strategies
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bool prevent_multiple;
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};
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struct callback_stub : callback_annotation_base {};
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// Type annotation to indicate that guest_layout/host_layout definitions should
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// be emitted even if the type is non-repackable. Pointer members will be
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// copied (or zero-extended) without regard for the referred data.
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struct emit_layout_wrappers {};
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struct type_annotation_base { bool prevent_multiple; };
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// Pointers to types annotated with this will be passed through without change
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struct opaque_type : type_annotation_base {};
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// Function parameter annotation.
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// Pointers are passed through to host (extending to 64-bit if needed) without modifying the pointee.
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// The type passed to Host will be guest_layout<pointee_type>*.
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struct ptr_passthrough {};
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// Type / Function parameter annotation.
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// Assume objects of the given type are compatible across architectures,
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// even if the generator can't automatically prove this. For pointers, this refers to the pointee type.
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// NOTE: In contrast to opaque_type, this allows for non-pointer members with the annotated type to be repacked automatically.
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struct assume_compatible_data_layout : type_annotation_base {};
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} // namespace fexgen
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