Basic allocations in rust user-space.

rust/lib/mammoth/src/syscall.rs

@@ -0,0 +1,31 @@
+use core::ffi::c_void;
+use core::panic::PanicInfo;
+
+include!("bindings.rs");
+
+pub fn syscall<T>(id: u64, req: &T) -> u64 {
+    unsafe { SysCall1(id, req as *const T as *const c_void) }
+}
+
+pub fn checked_syscall<T>(id: u64, req: &T) {
+    if syscall(id, req) != 0 {
+        debug("Bad syscall response.");
+        panic!();
+    }
+}
+
+#[panic_handler]
+fn panic(_info: &PanicInfo) -> ! {
+    // Internal error.
+    let req = ZProcessExitReq { code: 0x100 };
+    syscall(kZionProcessExit, &req);
+    unreachable!()
+}
+
+pub fn debug(msg: &str) {
+    let req = ZDebugReq {
+        message: msg.as_ptr() as *const i8,
+        size: msg.len() as u64,
+    };
+    syscall(kZionDebug, &req);
+}