SendMessage destination + ReceiveMessage source

src/lib.rs

@@ -22,9 +22,9 @@ pub mod io {
     //! I/O data structures
 
     pub use abi::io::{
-        DeviceRequest, DirectoryEntry, FileAttr, FileMode, FileType, MountOptions, OpenOptions,
-        PollControl, RawFd, SeekFrom, TerminalInputOptions, TerminalLineOptions, TerminalOptions,
-        TerminalOutputOptions, UnmountOptions,
+        DeviceRequest, DirectoryEntry, FileAttr, FileMode, FileType, MessageDestination,
+        MountOptions, OpenOptions, PollControl, RawFd, SeekFrom, TerminalInputOptions,
+        TerminalLineOptions, TerminalOptions, TerminalOutputOptions, UnmountOptions,
     };
 }
 

src/sys/mod.rs

@@ -5,8 +5,8 @@ use core::{mem::MaybeUninit, sync::atomic::AtomicU32, time::Duration};
 use abi::{
     error::{Error, SyscallResult},
     io::{
-        DeviceRequest, DirectoryEntry, FileAttr, FileMode, MountOptions, OpenOptions, PollControl,
-        RawFd, SeekFrom, UnmountOptions,
+        DeviceRequest, DirectoryEntry, FileAttr, FileMode, MessageDestination, MountOptions,
+        OpenOptions, PollControl, RawFd, SeekFrom, UnmountOptions,
     },
     mem::MappingSource,
     process::{
@@ -565,12 +565,17 @@ pub unsafe fn open_channel(name: &str, with_sub: bool) -> Result<RawFd, Error> {
 /// # Safety
 ///
 /// Unsafe: direct system call.
-pub unsafe fn send_message(fd: RawFd, msg: &[u8]) -> Result<(), Error> {
+pub unsafe fn send_message(
+    fd: RawFd,
+    msg: &[u8],
+    destination: MessageDestination,
+) -> Result<(), Error> {
     <()>::from_syscall_result(syscall!(
         SyscallFunction::SendMessage,
         argn!(fd.0 as usize),
         argp!(msg.as_ptr()),
-        argn!(msg.len())
+        argn!(msg.len()),
+        argn!(u64::from(destination) as usize)
     ))
 }
 
@@ -579,11 +584,16 @@ pub unsafe fn send_message(fd: RawFd, msg: &[u8]) -> Result<(), Error> {
 /// # Safety
 ///
 /// Unsafe: direct system call.
-pub unsafe fn receive_message(fd: RawFd, msg: &mut [u8]) -> Result<usize, Error> {
+pub unsafe fn receive_message(
+    fd: RawFd,
+    msg: &mut [u8],
+    from: &mut MaybeUninit<u32>,
+) -> Result<usize, Error> {
     usize::from_syscall_result(syscall!(
         SyscallFunction::ReceiveMessage,
         argn!(fd.0 as usize),
         argp!(msg.as_mut_ptr()),
-        argn!(msg.len())
+        argn!(msg.len()),
+        argp!(from as *mut _)
     ))
 }