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+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+use alloc::vec::Vec;
+use core::convert::TryFrom;
+use core::str::FromStr;
+use wasmi::{Signature, ValueType};
+
+
+
+
+
+
+
+
+
+pub fn get_signature(
+ params: impl Iterator<Item = ValueType>,
+ ret_ty: impl Into<Option<ValueType>>,
+) -> Signature {
+ wasmi::Signature::new(
+ params.map(wasmi::ValueType::from).collect::<Vec<_>>(),
+ ret_ty.into().map(wasmi::ValueType::from),
+ )
+}
+
+
+
+
+
+
+
+#[macro_export]
+macro_rules! sig {
+ (($($p:ident),*)) => {{
+ let params = core::iter::empty();
+ $(let params = params.chain(core::iter::once(ValueType::$p));)*
+ $crate::wasi_definitions::get_signature(params, None)
+ }};
+ (($($p:ident),*) -> $ret:ident) => {{
+ let params = core::iter::empty();
+ $(let params = params.chain(core::iter::once(ValueType::$p));)*
+ $crate::wasi_definitions::get_signature(params, Some($crate::ValueType::$ret))
+ }};
+}
+
+
+#[derive(Copy, Clone, Debug)]
+pub enum SystemCall {
+ ProcExit,
+ FdClose,
+ FdWrite,
+ FdSeek,
+ FdRead,
+ FdFdstatGet,
+ EnvironSizesGet,
+ EnvironGet,
+ FdPrestatGet,
+ FdPrestatDirName,
+ PathOpen,
+ FdFdstatSetFlags,
+ ArgsSizesGet,
+ ArgsGet,
+ ClockTimeGet,
+}
+
+impl FromStr for SystemCall {
+ type Err = &'static str;
+
+
+
+
+
+
+
+
+ fn from_str(fn_name: &str) -> Result<Self, Self::Err> {
+ match fn_name {
+ "proc_exit" => Ok(SystemCall::ProcExit),
+ "fd_close" => Ok(SystemCall::FdClose),
+ "fd_write" => Ok(SystemCall::FdWrite),
+ "fd_seek" => Ok(SystemCall::FdSeek),
+ "fd_read" => Ok(SystemCall::FdRead),
+ "fd_fdstat_get" => Ok(SystemCall::FdFdstatGet),
+ "environ_sizes_get" => Ok(SystemCall::EnvironSizesGet),
+ "environ_get" => Ok(SystemCall::EnvironGet),
+ "fd_prestat_get" => Ok(SystemCall::FdPrestatGet),
+ "fd_prestat_dir_name" => Ok(SystemCall::FdPrestatDirName),
+ "path_open" => Ok(SystemCall::PathOpen),
+ "fd_fdstat_set_flags" => Ok(SystemCall::FdFdstatSetFlags),
+ "args_sizes_get" => Ok(SystemCall::ArgsSizesGet),
+ "args_get" => Ok(SystemCall::ArgsGet),
+ "clock_time_get" => Ok(SystemCall::ClockTimeGet),
+ _ => Err("Unknown WASI system call."),
+ }
+ }
+}
+
+impl TryFrom<usize> for SystemCall {
+ type Error = &'static str;
+
+
+
+
+
+
+
+
+ fn try_from(syscall_index: usize) -> Result<Self, Self::Error> {
+ match syscall_index {
+ 0 => Ok(SystemCall::ProcExit),
+ 1 => Ok(SystemCall::FdClose),
+ 2 => Ok(SystemCall::FdWrite),
+ 3 => Ok(SystemCall::FdSeek),
+ 4 => Ok(SystemCall::FdRead),
+ 5 => Ok(SystemCall::FdFdstatGet),
+ 6 => Ok(SystemCall::EnvironSizesGet),
+ 7 => Ok(SystemCall::EnvironGet),
+ 8 => Ok(SystemCall::FdPrestatGet),
+ 9 => Ok(SystemCall::FdPrestatDirName),
+ 10 => Ok(SystemCall::PathOpen),
+ 11 => Ok(SystemCall::FdFdstatSetFlags),
+ 12 => Ok(SystemCall::ArgsSizesGet),
+ 13 => Ok(SystemCall::ArgsGet),
+ 14 => Ok(SystemCall::ClockTimeGet),
+ _ => Err("Unknown WASI system call."),
+ }
+ }
+}
+
+impl Into<usize> for SystemCall {
+
+
+
+
+ fn into(self) -> usize {
+ match self {
+ SystemCall::ProcExit => 0,
+ SystemCall::FdClose => 1,
+ SystemCall::FdWrite => 2,
+ SystemCall::FdSeek => 3,
+ SystemCall::FdRead => 4,
+ SystemCall::FdFdstatGet => 5,
+ SystemCall::EnvironSizesGet => 6,
+ SystemCall::EnvironGet => 7,
+ SystemCall::FdPrestatGet => 8,
+ SystemCall::FdPrestatDirName => 9,
+ SystemCall::PathOpen => 10,
+ SystemCall::FdFdstatSetFlags => 11,
+ SystemCall::ArgsSizesGet => 12,
+ SystemCall::ArgsGet => 13,
+ SystemCall::ClockTimeGet => 14,
+ }
+ }
+}
+
+impl Into<Signature> for SystemCall {
+
+
+
+
+ fn into(self) -> Signature {
+ match self {
+ SystemCall::ProcExit => sig!((I32)),
+ SystemCall::FdClose => sig!((I32)->I32),
+ SystemCall::FdWrite => sig!((I32,I32,I32,I32)->I32),
+ SystemCall::FdSeek => sig!((I32,I64,I32,I32)->I32),
+ SystemCall::FdRead => sig!((I32,I32,I32,I32)->I32),
+ SystemCall::FdFdstatGet => sig!((I32,I32)->I32),
+ SystemCall::EnvironSizesGet => sig!((I32,I32)->I32),
+ SystemCall::EnvironGet => sig!((I32,I32)->I32),
+ SystemCall::FdPrestatGet => sig!((I32,I32)->I32),
+ SystemCall::FdPrestatDirName => sig!((I32,I32,I32)->I32),
+ SystemCall::PathOpen => sig!((I32,I32,I32,I32,I32,I64,I64,I32,I32)->I32),
+ SystemCall::FdFdstatSetFlags => sig!((I32,I32)->I32),
+ SystemCall::ArgsSizesGet => sig!((I32,I32)->I32),
+ SystemCall::ArgsGet => sig!((I32,I32)->I32),
+ SystemCall::ClockTimeGet => sig!((I32,I64,I32)->I32),
+ }
+ }
+}
+
+
+pub const FULL_DIR_RIGHTS: wasi::Rights = wasi::RIGHTS_FD_FDSTAT_SET_FLAGS
+ | wasi::RIGHTS_FD_SYNC
+ | wasi::RIGHTS_FD_ADVISE
+ | wasi::RIGHTS_PATH_CREATE_DIRECTORY
+ | wasi::RIGHTS_PATH_CREATE_FILE
+ | wasi::RIGHTS_PATH_LINK_SOURCE
+ | wasi::RIGHTS_PATH_LINK_TARGET
+ | wasi::RIGHTS_PATH_OPEN
+ | wasi::RIGHTS_FD_READDIR
+ | wasi::RIGHTS_PATH_READLINK
+ | wasi::RIGHTS_PATH_RENAME_SOURCE
+ | wasi::RIGHTS_PATH_RENAME_TARGET
+ | wasi::RIGHTS_PATH_FILESTAT_GET
+ | wasi::RIGHTS_PATH_FILESTAT_SET_SIZE
+ | wasi::RIGHTS_PATH_FILESTAT_SET_TIMES
+ | wasi::RIGHTS_FD_FILESTAT_GET
+ | wasi::RIGHTS_FD_FILESTAT_SET_SIZE
+ | wasi::RIGHTS_FD_FILESTAT_SET_TIMES
+ | wasi::RIGHTS_PATH_SYMLINK
+ | wasi::RIGHTS_PATH_REMOVE_DIRECTORY
+ | wasi::RIGHTS_PATH_UNLINK_FILE
+ | wasi::RIGHTS_POLL_FD_READWRITE;
+
+
+pub const FULL_FILE_RIGHTS: wasi::Rights = wasi::RIGHTS_FD_DATASYNC
+ | wasi::RIGHTS_FD_READ
+ | wasi::RIGHTS_FD_SEEK
+ | wasi::RIGHTS_FD_FDSTAT_SET_FLAGS
+ | wasi::RIGHTS_FD_SYNC
+ | wasi::RIGHTS_FD_TELL
+ | wasi::RIGHTS_FD_WRITE
+ | wasi::RIGHTS_FD_ADVISE
+ | wasi::RIGHTS_FD_ALLOCATE
+ | wasi::RIGHTS_FD_FILESTAT_GET
+ | wasi::RIGHTS_FD_FILESTAT_SET_SIZE
+ | wasi::RIGHTS_FD_FILESTAT_SET_TIMES
+ | wasi::RIGHTS_POLL_FD_READWRITE
+ | wasi::RIGHTS_FD_FILESTAT_SET_TIMES
+ | wasi::RIGHTS_POLL_FD_READWRITE;
+