Kernel shell as a syscall

include/kernel/ke/syscall.h

@@ -31,7 +31,7 @@
 
 //----------------------------------------------------------------------------//
 
-#define LATEST_SYSCALL_CODE 0
+#define LATEST_SYSCALL_CODE 3
 
 //----------------------------------------------------------------------------//
 

kaleid/kernel/ke/syscall.c

@@ -27,6 +27,7 @@
 #include <ke/idt.h>
 #include <ke/syscall.h>
 #include <io/vga.h>
+#include <sh/shell.h>
 
 static error_t (*syscallTable[255])(void*, void*, void*, ISRFrame_t*) = {NULL};
 
@@ -46,23 +47,37 @@ error_t _KeSyscallHandler(  ulong code, void *rdi, void *rsi, void *rdx,
     }
     
     if (code > LATEST_SYSCALL_CODE) {
-        return EINVAL;
+        return ENOSYS;
     }
     
-    return syscallTable[(uchar)code](rdi, rsi, rdx, regs);
-    
-    return EOK;
+    return syscallTable[(uchar)code](rdi, rsi, rdx, regs);    
 }
 
 //
 //  Syscalls
 //
-static error_t syscallRead(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
+static error_t syscallStub(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
 {
-    DebugLog("syscallRead attempted\n");
-    return EOK;
+    return ENOSYS;
 }
 
+static error_t syscallRead(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
+{
+    return ENOSYS;
+}
+
+static error_t syscallWrite(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
+{
+    return ENOSYS;
+}
+
+static error_t syscallKernelShell(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
+{
+    KeEnableIRQs();
+    ShStartShell(); //TODO : return from Shell
+    KePauseIRQs();
+    return EOK;
+}
 
 //
 //  Initializes the syscall table
@@ -70,4 +85,8 @@ static error_t syscallRead(void *rdi, void *rsi, void *rdx, ISRFrame_t *regs)
 void KeEnableSyscalls()
 {
     syscallTable[0] = syscallRead;
+    syscallTable[1] = syscallWrite;
+    syscallTable[2] = syscallStub;
+    syscallTable[3] = syscallStub;
+    syscallTable[4] = syscallKernelShell;
 }

kaleid/user/test/test.asm

@@ -28,7 +28,7 @@ global UserTest
 global EndOfUser
 
 UserTest:
-    mov rdi, 45
+    mov rdi, 4
     int 0x80
 
 .clone: