X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Fsyscalls.c;h=9e7d35f813840e3e7a7cb3cab2c4652cc34eb31f;hb=eecce4b7a55315f6c385ad8be35c25dbb12d43d8;hp=a555720f2336660cc2ff1e8633d88c24937bc086;hpb=56b770130dc830c6a9dccb6c50e6442a8bdb0b6c;p=tpg%2Facess2.git

diff --git a/Kernel/syscalls.c b/Kernel/syscalls.c
index a555720f..9e7d35f8 100644
--- a/Kernel/syscalls.c
+++ b/Kernel/syscalls.c
@@ -32,6 +32,7 @@ extern tUID	Threads_GetUID();
 extern int	Threads_SetUID(Uint *errno, tUID ID);
 extern tGID	Threads_GetGID();
 extern int	Threads_SetGID(Uint *errno, tGID ID);
+extern int	Threads_SetFaultHandler(Uint Handler);
 
 // === PROTOTYPES ===
  int	Syscall_ValidString(Uint Addr);
@@ -60,6 +61,11 @@ void SyscallHandler(tSyscallRegs *Regs)
 	// -- Yield current timeslice
 	case SYS_YIELD:	Threads_Yield();	break;
 	
+	// -- Set Error Handler
+	case SYS_SETFAULTHANDLER:
+		Threads_SetFaultHandler(Regs->Arg1);
+		break;
+	
 	// -- Clone the current thread
 	case SYS_CLONE:
 		// Call clone system call
@@ -118,9 +124,10 @@ 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;
@@ -167,7 +174,7 @@ void SyscallHandler(tSyscallRegs *Regs)
 		if( !Syscall_ValidString(Regs->Arg1)
 		||  !Syscall_Valid(sizeof(Uint), Regs->Arg2) ) {
 			err = -EINVAL;
-			ret = -1;
+			ret = 0;
 			break;
 		}
 		// Path, *Entrypoint
@@ -191,7 +198,11 @@ void SyscallHandler(tSyscallRegs *Regs)
 		break;
 	
 	case SYS_SEEK:
+		#if BITS == 64
 		ret = VFS_Seek( Regs->Arg1, Regs->Arg2, Regs->Arg3 );
+		#else
+		ret = VFS_Seek( Regs->Arg1, Regs->Arg2|(((Uint64)Regs->Arg3)<<32), Regs->Arg4 );
+		#endif
 		break;
 		
 	case SYS_TELL:
@@ -234,6 +245,16 @@ void SyscallHandler(tSyscallRegs *Regs)
 		ret = VFS_ReadDir( Regs->Arg1, (void*)Regs->Arg2 );
 		break;
 	
+	// Open a file that is a entry in an open directory
+	case SYS_OPENCHILD:
+		if( !Syscall_ValidString(Regs->Arg2) ) {
+			err = -EINVAL;
+			ret = -1;
+			break;
+		}
+		ret = VFS_OpenChild( &err, Regs->Arg1, (char*)Regs->Arg2, Regs->Arg3);
+		break;
+	
 	// Change Directory
 	case SYS_CHDIR:
 		if( !Syscall_ValidString(Regs->Arg1) ) {