SYSCALL addition
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01c0c118dd
commit
62099ff635
158
src/main.rs
158
src/main.rs
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@ -1,7 +1,7 @@
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use wabt;
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use wasmi::{
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Error, Externals, FuncInstance, FuncRef, ImportsBuilder, ModuleImportResolver, ModuleInstance,
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RuntimeArgs, RuntimeValue, Signature, Trap, ValueType,
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Error, Externals, FuncInstance, FuncRef, ImportsBuilder, ModuleImportResolver, ModuleInstance,
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RuntimeArgs, RuntimeValue, Signature, Trap, ValueType,
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};
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mod wasm_sys;
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@ -11,96 +11,102 @@ pub const KILL: usize = 0;
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struct HostFunctions;
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impl HostFunctions {
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fn check_signature(&self, index: usize, signature: &Signature) -> bool {
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let (params, ret_ty): (&[ValueType], Option<ValueType>) = match index.into() {
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SysCall::KILL => (&[ValueType::I32, ValueType::I32], Some(ValueType::I32)),
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_ => return false,
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};
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signature.params() == params && signature.return_type() == ret_ty
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}
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fn check_signature(&self, index: usize, signature: &Signature) -> bool {
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let (params, ret_ty): (&[ValueType], Option<ValueType>) = match index.into() {
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SysCall::KILL => (&[ValueType::I32, ValueType::I32], Some(ValueType::I32)),
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_ => return false,
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};
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signature.params() == params && signature.return_type() == ret_ty
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}
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}
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impl Externals for HostFunctions {
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fn invoke_index(
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&mut self,
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index: usize,
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args: RuntimeArgs,
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) -> Result<Option<RuntimeValue>, Trap> {
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match index.into() {
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SysCall::KILL => {
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let a: u32 = args.nth_checked(0)?;
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let b: u32 = args.nth_checked(1)?;
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let result = a + b;
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fn invoke_index(
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&mut self,
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index: usize,
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args: RuntimeArgs,
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) -> Result<Option<RuntimeValue>, Trap> {
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match index.into() {
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SysCall::KILL => {
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let a: u32 = args.nth_checked(0)?;
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let b: u32 = args.nth_checked(1)?;
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let result = a + b;
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Ok(Some(RuntimeValue::I32(result as i32)))
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}
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_ => panic!("Unimplemented function at {}", index),
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}
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}
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Ok(Some(RuntimeValue::I32(result as i32)))
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}
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SysCall::CONSOLE_RESET => {}
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SysCall::CONSOLE_IN => {}
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SysCall::CONSOLE_OUT => {}
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SysCall::CONSOLE_GET_TITLE => {}
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SysCall::CONSOLE_SET_TITLE => {}
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_ => panic!("Unimplemented function at {}", index),
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}
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}
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}
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impl ModuleImportResolver for HostFunctions {
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fn resolve_func(&self, field_name: &str, signature: &Signature) -> Result<FuncRef, Error> {
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let index = match field_name {
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"add" => SysCall::KILL as usize,
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_ => {
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fn resolve_func(&self, field_name: &str, signature: &Signature) -> Result<FuncRef, Error> {
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let index = match field_name {
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"add" => SysCall::KILL as usize,
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_ => {
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return Err(Error::Instantiation(format!(
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"Export {} not found",
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field_name
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)))
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}
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};
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if !self.check_signature(index, signature) {
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return Err(Error::Instantiation(format!(
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"Export {} not found",
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field_name
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)))
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}
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};
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"Export {} has a bad signature",
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field_name
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)));
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}
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if !self.check_signature(index, signature) {
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return Err(Error::Instantiation(format!(
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"Export {} has a bad signature",
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field_name
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)));
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}
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Ok(FuncInstance::alloc_host(
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Signature::new(&[ValueType::I32, ValueType::I32][..], Some(ValueType::I32)),
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index,
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))
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}
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Ok(FuncInstance::alloc_host(
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Signature::new(&[ValueType::I32, ValueType::I32][..], Some(ValueType::I32)),
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index,
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))
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}
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}
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fn main() {
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// Parse WAT (WebAssembly Text format) into wasm bytecode.
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let wasm_binary = wabt::wat2wasm(include_str!("../wasm/test.wat"));
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// Parse WAT (WebAssembly Text format) into wasm bytecode.
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let wasm_binary = wabt::wat2wasm(include_str!("../wasm/test.wat"));
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let wasm_binary = match wasm_binary {
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Ok(abc) => abc,
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Err(abc) => {
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println!("{}", abc);
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return;
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}
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};
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let wasm_binary = match wasm_binary {
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Ok(abc) => abc,
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Err(abc) => {
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println!("{}", abc);
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return;
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}
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};
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// .expect("failed to parse wat");
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// .expect("failed to parse wat");
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// Load wasm binary and prepare it for instantiation.
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let module = wasmi::Module::from_buffer(&wasm_binary).expect("failed to load wasm");
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// Load wasm binary and prepare it for instantiation.
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let module = wasmi::Module::from_buffer(&wasm_binary).expect("failed to load wasm");
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let imports = ImportsBuilder::new().with_resolver("host", &HostFunctions);
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let imports = ImportsBuilder::new().with_resolver("host", &HostFunctions);
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// Instantiate a module with empty imports and
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// assert that there is no `start` function.
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let instance = ModuleInstance::new(&module, &imports)
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.expect("failed to instantiate wasm module")
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.assert_no_start();
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// Instantiate a module with empty imports and
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// assert that there is no `start` function.
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let instance = ModuleInstance::new(&module, &imports)
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.expect("failed to instantiate wasm module")
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.assert_no_start();
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// Finally, invoke the exported function "test" with no parameters
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// and empty external function executor.
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let result: i32 = instance
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.invoke_export("main", &[], &mut HostFunctions)
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// .with_resolver(&mut HostFunctions)
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.expect("failed to execute export")
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.unwrap()
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.try_into()
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.unwrap();
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// Finally, invoke the exported function "test" with no parameters
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// and empty external function executor.
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let result: i32 = instance
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.invoke_export("main", &[], &mut HostFunctions)
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// .with_resolver(&mut HostFunctions)
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.expect("failed to execute export")
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.unwrap()
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.try_into()
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.unwrap();
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println!(
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"{:?}",
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result // .unwrap()
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);
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println!(
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"{:?}",
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result // .unwrap()
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);
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}
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@ -8,7 +8,8 @@ declum! {
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CONSOLE_OUT = 3, // Console output
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CONSOLE_GET_TITLE = 4, // Get the console title
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CONSOLE_SET_TITLE = 5, // Set the console title
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GET_PID = 6; // Get the proccess ID
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PROCESS_INFO = 7; // Get information about the process
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//scheduler Related Syscals
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GET_PRIORITY = 10, // Get scheduler priority
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SET_PRIORITY = 11, // Set scheduler priority
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@ -33,6 +34,24 @@ declum! {
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FILE_READ = 30,
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FILE_WRITE = 31,
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SLEEP=32, // Sleep in milliseconds
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SLEEP_UNTIL=33, // Sleep until this time in milliseconds (if this is below the current time return)
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NANOSLEEP=34, // Sleep in nanoseconds
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NANOSLEEP_UNTIL=35, // Sleep until this time nanoseconds (if this is below the current time return)
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GET_TIME = 36, // Gets the system time (some derivitive of seconds)
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SET_TIME = 37, // Sets the system time (some derivitive of seconds)
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// Socket SysCall
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SOCKET_BIND=39, // Used by servers to lock a port
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SOCKET_CONNECT=40,
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SOCKET_DISCONNECT=41,
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SOCKET_SEND=42,
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SOCKET_RECIEVE=43,
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// Security Syscalls
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ENCRYPT = 50;
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EMPTY = u32::MAX as usize
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