Changes to the module loader to handle specific errors from modules

[tpg/acess2.git] / Kernel / syscalls.c

diff --git a/Kernel/syscalls.c b/Kernel/syscalls.c
index a555720..523b3f2 100644 (file)
--- a/Kernel/syscalls.c
+++ b/Kernel/syscalls.c
@@ -118,9 +118,10 @@ void SyscallHandler(tSyscallRegs *Regs)
        // -- Check for messages
        case SYS_GETMSG:
                CHECK_NUM_NULLOK(Regs->Arg1, sizeof(Uint));
-               //NOTE: Uncertain due to length being unknown
-               // (Proc_GetMessage should check itself)
-               CHECK_NUM_NULLOK(Regs->Arg2, sizeof(Uint)*4);
+               if( Regs->Arg2 && Regs->Arg2 != -1 && !MM_IsUser(Regs->Arg2) )
+               {
+                       err = -EINVAL;  ret = -1;       break;
+               }
                // *Source, *Data
                ret = Proc_GetMessage(&err, (Uint*)Regs->Arg1, (void*)Regs->Arg2);
                break;