1 files changed, 283 insertions, 0 deletions
diff --git a/library/std/src/os/xous/ffi/definitions.rs b/library/std/src/os/xous/ffi/definitions.rs
new file mode 100644
index 000000000..345005bcc
--- /dev/null
+++ b/library/std/src/os/xous/ffi/definitions.rs
@@ -0,0 +1,283 @@
+mod memoryflags;
+pub(crate) use memoryflags::*;
+
+#[stable(feature = "rust1", since = "1.0.0")]
+/// Indicates a particular syscall number as used by the Xous kernel.
+#[derive(Copy, Clone)]
+#[repr(usize)]
+pub enum Syscall {
+    MapMemory = 2,
+    Yield = 3,
+    UpdateMemoryFlags = 12,
+    ReceiveMessage = 15,
+    SendMessage = 16,
+    Connect = 17,
+    CreateThread = 18,
+    UnmapMemory = 19,
+    ReturnMemory = 20,
+    TerminateProcess = 22,
+    TrySendMessage = 24,
+    TryConnect = 25,
+    GetThreadId = 32,
+    JoinThread = 36,
+    AdjustProcessLimit = 38,
+    ReturnScalar = 40,
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+/// Copies of these invocation types here for when we're running
+/// in environments without libxous.
+#[derive(Copy, Clone)]
+#[repr(usize)]
+pub enum SyscallResult {
+    Ok = 0,
+    Error = 1,
+    MemoryRange = 3,
+    ConnectionId = 7,
+    Message = 9,
+    ThreadId = 10,
+    Scalar1 = 14,
+    Scalar2 = 15,
+    MemoryReturned = 18,
+    Scalar5 = 20,
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+#[derive(Copy, Clone)]
+/// A list of all known errors that may be returned by the Xous kernel.
+#[repr(usize)]
+pub enum Error {
+    NoError = 0,
+    BadAlignment = 1,
+    BadAddress = 2,
+    OutOfMemory = 3,
+    MemoryInUse = 4,
+    InterruptNotFound = 5,
+    InterruptInUse = 6,
+    InvalidString = 7,
+    ServerExists = 8,
+    ServerNotFound = 9,
+    ProcessNotFound = 10,
+    ProcessNotChild = 11,
+    ProcessTerminated = 12,
+    Timeout = 13,
+    InternalError = 14,
+    ServerQueueFull = 15,
+    ThreadNotAvailable = 16,
+    UnhandledSyscall = 17,
+    InvalidSyscall = 18,
+    ShareViolation = 19,
+    InvalidThread = 20,
+    InvalidPid = 21,
+    UnknownError = 22,
+    AccessDenied = 23,
+    UseBeforeInit = 24,
+    DoubleFree = 25,
+    DebugInProgress = 26,
+    InvalidLimit = 27,
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl From<usize> for Error {
+    fn from(src: usize) -> Self {
+        match src {
+            0 => Self::NoError,
+            1 => Self::BadAlignment,
+            2 => Self::BadAddress,
+            3 => Self::OutOfMemory,
+            4 => Self::MemoryInUse,
+            5 => Self::InterruptNotFound,
+            6 => Self::InterruptInUse,
+            7 => Self::InvalidString,
+            8 => Self::ServerExists,
+            9 => Self::ServerNotFound,
+            10 => Self::ProcessNotFound,
+            11 => Self::ProcessNotChild,
+            12 => Self::ProcessTerminated,
+            13 => Self::Timeout,
+            14 => Self::InternalError,
+            15 => Self::ServerQueueFull,
+            16 => Self::ThreadNotAvailable,
+            17 => Self::UnhandledSyscall,
+            18 => Self::InvalidSyscall,
+            19 => Self::ShareViolation,
+            20 => Self::InvalidThread,
+            21 => Self::InvalidPid,
+            23 => Self::AccessDenied,
+            24 => Self::UseBeforeInit,
+            25 => Self::DoubleFree,
+            26 => Self::DebugInProgress,
+            27 => Self::InvalidLimit,
+            22 | _ => Self::UnknownError,
+        }
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl From<i32> for Error {
+    fn from(src: i32) -> Self {
+        let Ok(src) = core::convert::TryInto::<usize>::try_into(src) else {
+            return Self::UnknownError;
+        };
+        src.into()
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl core::fmt::Display for Error {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        write!(
+            f,
+            "{}",
+            match self {
+                Error::NoError => "no error occurred",
+                Error::BadAlignment => "memory was not properly aligned",
+                Error::BadAddress => "an invalid address was supplied",
+                Error::OutOfMemory => "the process or service has run out of memory",
+                Error::MemoryInUse => "the requested address is in use",
+                Error::InterruptNotFound =>
+                    "the requested interrupt does not exist on this platform",
+                Error::InterruptInUse => "the requested interrupt is currently in use",
+                Error::InvalidString => "the specified string was not formatted correctly",
+                Error::ServerExists => "a server with that address already exists",
+                Error::ServerNotFound => "the requetsed server could not be found",
+                Error::ProcessNotFound => "the target process does not exist",
+                Error::ProcessNotChild =>
+                    "the requested operation can only be done on child processes",
+                Error::ProcessTerminated => "the target process has crashed",
+                Error::Timeout => "the requested operation timed out",
+                Error::InternalError => "an internal error occurred",
+                Error::ServerQueueFull => "the server has too many pending messages",
+                Error::ThreadNotAvailable => "the specified thread does not exist",
+                Error::UnhandledSyscall => "the kernel did not recognize that syscall",
+                Error::InvalidSyscall => "the syscall had incorrect parameters",
+                Error::ShareViolation => "an attempt was made to share memory twice",
+                Error::InvalidThread => "tried to resume a thread that was not ready",
+                Error::InvalidPid => "kernel attempted to use a pid that was not valid",
+                Error::AccessDenied => "no permission to perform the requested operation",
+                Error::UseBeforeInit => "attempt to use a service before initialization finished",
+                Error::DoubleFree => "the requested resource was freed twice",
+                Error::DebugInProgress => "kernel attempted to activate a thread being debugged",
+                Error::InvalidLimit => "process attempted to adjust an invalid limit",
+                Error::UnknownError => "an unknown error occurred",
+            }
+        )
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl core::fmt::Debug for Error {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl crate::error::Error for Error {}
+
+/// Indicates the type of Message that is sent when making a `SendMessage` syscall.
+#[derive(Copy, Clone)]
+#[repr(usize)]
+pub(crate) enum InvokeType {
+    LendMut = 1,
+    Lend = 2,
+    Move = 3,
+    Scalar = 4,
+    BlockingScalar = 5,
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+#[derive(Debug, Copy, Clone)]
+/// A representation of a connection to a Xous service.
+pub struct Connection(u32);
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl From<u32> for Connection {
+    fn from(src: u32) -> Connection {
+        Connection(src)
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl TryFrom<usize> for Connection {
+    type Error = core::num::TryFromIntError;
+    fn try_from(src: usize) -> Result<Self, Self::Error> {
+        Ok(Connection(src.try_into()?))
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl Into<u32> for Connection {
+    fn into(self) -> u32 {
+        self.0
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl TryInto<usize> for Connection {
+    type Error = core::num::TryFromIntError;
+    fn try_into(self) -> Result<usize, Self::Error> {
+        self.0.try_into()
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+#[derive(Debug)]
+pub enum ServerAddressError {
+    InvalidLength,
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+pub struct ServerAddress([u32; 4]);
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl TryFrom<&str> for ServerAddress {
+    type Error = ServerAddressError;
+    fn try_from(value: &str) -> Result<Self, Self::Error> {
+        let b = value.as_bytes();
+        if b.len() == 0 || b.len() > 16 {
+            return Err(Self::Error::InvalidLength);
+        }
+
+        let mut this_temp = [0u8; 16];
+        for (dest, src) in this_temp.iter_mut().zip(b.iter()) {
+            *dest = *src;
+        }
+
+        let mut this = [0u32; 4];
+        for (dest, src) in this.iter_mut().zip(this_temp.chunks_exact(4)) {
+            *dest = u32::from_le_bytes(src.try_into().unwrap());
+        }
+        Ok(ServerAddress(this))
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+impl Into<[u32; 4]> for ServerAddress {
+    fn into(self) -> [u32; 4] {
+        self.0
+    }
+}
+
+#[derive(Debug, Copy, Clone)]
+pub(crate) struct ThreadId(usize);
+
+impl From<usize> for ThreadId {
+    fn from(src: usize) -> ThreadId {
+        ThreadId(src)
+    }
+}
+
+impl Into<usize> for ThreadId {
+    fn into(self) -> usize {
+        self.0
+    }
+}
+
+#[derive(Copy, Clone)]
+#[repr(usize)]
+/// Limits that can be passed to `AdjustLimit`
+pub(crate) enum Limits {
+    HeapMaximum = 1,
+    HeapSize = 2,
+}