801358333d
This fixes some hard-coded assumptions in the debug crate that the native ELF files being accessed are little-endian; specifically in create_gdbjit_image as well as in emit_dwarf. In addition, data in WebAssembly memory always uses little-endian byte order. Therefore, if the native architecture is big-endian, all references to base types need to be marked as little-endian using the DW_AT_endianity attribute, so that the debugger will be able to correctly access them.
This is the wasmtime-environ crate, which contains the implementations
of the ModuleEnvironment and FuncEnvironment traits from
cranelift-wasm. They effectively
implement an ABI for basic wasm compilation that defines how linear memories
are allocated, how indirect calls work, and other details. They can be used
for JITing, native object files, or other purposes.