wasmonkey 0.1.18

WebAssembly object-file patcher for replacing exported functions with imports from a builtins library
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WASMonkey

The WASMonkey patches a WASM object file to replace a set of exported functions with imported functions from another library.

Usage

USAGE:
    wasmonkey [FLAGS] [OPTIONS] --input <input_file> --output <output_file>

FLAGS:
    -n, --original-names    Use the original name as a key in the builtins map
    -h, --help              Prints help information
    -V, --version           Prints version information

OPTIONS:
    -B, --builtins-additional <builtins_additional>...    Additional builtins function names to replace
    -b, --builtins <builtins_file>                        Path to the builtins library
    -m, --builtins-map <builtins_map_file>                Path to the builtins map file
    -i, --input <input_file>                              Path to the input file
    -o, --output <output_file>                            Path to the output file

builtins_file is an object containing alternative implementations to functions called in the wasm code.

Symbols starting with a builtin_ prefix will be used for substitution.

For example, a memmove() function defined as an external in the WASM object will be replaced by calls to an imported builtin_memmove() function, if builtin_memmove() is present in the builtins file.

A JSON-encoded map of the performed substitutions can be optionally written into builtins_map_file.