cranelift

rust jit wasm webassembly runtime wasi cranelift sandbox wasmtime

Saúl Cabrera 426c49b8e3 winch: Use aarch64 backend for code emission. (#5652 ) This patch introduces basic aarch64 code generation by using `cranelift-codegen`'s backend. This commit does not: * Change the semantics of the code generation * Adds support for other Wasm instructions The most notable change in this patch is how addressing modes are handled at the MacroAssembler layer: instead of having a canonical address representation, this patch introduces the addressing mode as an associated type in the MacroAssembler trait. This approach has the advantage that gives each ISA enough flexiblity to describe the addressing modes and their constraints in isolation without having to worry on how a particular addressing mode is going to affect other ISAs. In the case of Aarch64 this becomes useful to describe indexed addressing modes (particularly from the stack pointer). This patch uses the concept of a shadow stack pointer (x28) as a workaround to Aarch64's stack pointer 16-byte alignment. This constraint is enforced by: * Introducing specialized addressing modes when using the real stack pointer; this enables auditing when the real stack pointer is used. As of this change, the real stack pointer is only used in the function's prologue and epilogue. * Asserting that the real stack pointer is not used as a base for addressing modes. * Ensuring that at any point during the code generation process where the stack pointer changes (e.g. when stack space is allocated / deallocated) the value of the real stack pointer is copied into the shadow stack pointer.		2 years ago
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filetests	winch: Use aarch64 backend for code emission. (#5652)	2 years ago
src	winch: Use aarch64 backend for code emission. (#5652)	2 years ago
Cargo.toml	winch: Adding support for integration tests (#5588)	2 years ago
build.rs	Making sure that new files in the winch filetests directory will cause a rebuild (#5672)	2 years ago