Commenting for new function

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

diff --git a/Kernel/syscalls.c b/Kernel/syscalls.c
index ba9051a..523b3f2 100644 (file)
--- a/Kernel/syscalls.c
+++ b/Kernel/syscalls.c
@@ -28,8 +28,10 @@ extern Uint  Binary_Load(char *file, Uint *entryPoint);
 extern int     Threads_SetName(char *NewName);
 extern int     Threads_GetPID();
 extern int     Threads_GetTID();
-extern int     Threads_GetUID();
-extern int     Threads_GetGID();
+extern tUID    Threads_GetUID();
+extern int     Threads_SetUID(Uint *errno, tUID ID);
+extern tGID    Threads_GetGID();
+extern int     Threads_SetGID(Uint *errno, tGID ID);
 
 // === PROTOTYPES ===
  int   Syscall_ValidString(Uint Addr);
@@ -40,7 +42,7 @@ extern int    Threads_GetGID();
 void SyscallHandler(tSyscallRegs *Regs)
 {
        Uint64  ret = 0;
-       Uint    err = 0;
+       Uint    err = -EOK;
        
        ENTER("iThread iNum", Threads_GetTID(), Regs->Num);
        if(Regs->Num < NUM_SYSCALLS)
@@ -104,8 +106,8 @@ void SyscallHandler(tSyscallRegs *Regs)
        case SYS_GETGID:        ret = Threads_GetGID(); break;
        
        // -- Set User/Group IDs
-       case SYS_SETUID:        Log("Setting User ID to %i", Regs->Arg1);       break;
-       case SYS_SETGID:        Log("Setting Group ID to %i", Regs->Arg1);      break;
+       case SYS_SETUID:        ret = Threads_SetUID(&err, Regs->Arg1); break;
+       case SYS_SETGID:        ret = Threads_SetGID(&err, Regs->Arg1); break;
        
        // -- Send Message
        case SYS_SENDMSG:
@@ -116,9 +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;