ptos/amd64+ke: Add system call groundwork + exit syscall

Signed-off-by: Chloe M. <chloe@mensia.org>
2026-07-15 21:20:35 +00:00
parent d72df46f64
commit d4390c6a1b
9 changed files with 146 additions and 0 deletions
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: System call dispatch
+ * Author:      Chloe M.
+ */
+
+#include <ke/syscall.h>
+#include <machine/frame.h>
+
+/*
+ * Dispatch incoming system calls
+ *
+ * @Frame:  Trapframe snapshot
+ */
+VOID
+MdSyscallDispatch(TRAP_FRAME *Frame)
+{
+    SYSCALL_ARGS ScArgs;
+
+    if (Frame == NULL) {
+        return;
+    }
+
+    /* Is this system call number valid? */
+    if (Frame->Rax == 0 || Frame->Rax >= _SYSCALL_MAX) {
+        Frame->Rax = STATUS_INVALID_PARAM;
+        return;
+    }
+
+    ScArgs.Arg[0] = Frame->Rdi;
+    ScArgs.Arg[1] = Frame->Rsi;
+    ScArgs.Arg[2] = Frame->Rdx;
+    ScArgs.Arg[3] = Frame->Rcx;
+    ScArgs.Arg[4] = Frame->R8;
+    ScArgs.Arg[5] = Frame->R9;
+    SystemCallTable[Frame->Rax](&ScArgs);
+}