X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Fsyscalls.c;h=492c33e3d606d95b81b1d424f7ba2b9c46d7c6a4;hb=3f47fd7edcc581911a23ca075a463c5c8de9ab9a;hp=ddcdfa2d4c145324a5a35111d73ac53a6e63c96f;hpb=c90736022b1f62a99b15c8613aa7e3f514e01fc9;p=tpg%2Facess2.git

diff --git a/Kernel/syscalls.c b/Kernel/syscalls.c
index ddcdfa2d..492c33e3 100644
--- a/Kernel/syscalls.c
+++ b/Kernel/syscalls.c
@@ -11,39 +11,54 @@
 
 // === IMPORTS ===
 extern int	Proc_Clone(Uint *Err, Uint Flags);
+extern int	Threads_WaitTID(int TID, int *status);
 extern Uint	Proc_SendMessage(Uint *Err, Uint Dest, Uint Length, void *Data);
 extern int	Proc_GetMessage(Uint *Err, Uint *Source, void *Buffer);
 extern int	Proc_Execve(char *File, char **ArgV, char **EnvP);
 extern Uint	Binary_Load(char *file, Uint *entryPoint);
+extern int	VFS_FInfo(int FD, void *Dest, int MaxACLs);
+extern int	VFS_GetACL(int FD, void *Dest);
+extern int	VFS_ChDir(char *Dest);
+extern int	Threads_SetName(char *NewName);
+extern int	Threads_GetPID();
+extern int	Threads_GetTID();
+extern int	Threads_GetUID();
+extern int	Threads_GetGID();
+
+// === PROTOTYPES ===
+ int	Syscall_ValidString(Uint Addr);
+ int	Syscall_Valid(int Size, Uint Addr);
 
 // === CODE ===
+// TODO: Do sanity checking on arguments, ATM the user can really fuck with the kernel
 void SyscallHandler(tSyscallRegs *Regs)
 {
 	Uint64	ret = 0;
 	Uint	err = 0;
 	#if DEBUG
-	ENTER("iThread iNum", gCurrentThread->TID, Regs->Num);
+	ENTER("iThread iNum", Threads_GetTID(), Regs->Num);
 	if(Regs->Num < NUM_SYSCALLS)
 		LOG("Syscall %s", cSYSCALL_NAMES[Regs->Num]);
 	LOG("Arg1: 0x%x, Arg2: 0x%x, Arg3: 0x%x", Regs->Arg1, Regs->Arg2, Regs->Arg3);
 	#endif
+	
 	switch(Regs->Num)
 	{
 	// -- Exit the current thread
-	case SYS_EXIT:	Proc_Exit();	break;
+	case SYS_EXIT:	Threads_Exit();	break;
 	
 	// -- Put the current thread to sleep
-	case SYS_SLEEP:	Proc_Sleep();	Log(" SyscallHandler: %i is alive", gCurrentThread->TID);	break;
+	case SYS_SLEEP:	Threads_Sleep();	break;
 	
 	// -- Yield current timeslice
-	case SYS_YIELD:	Proc_Yield();	break;
+	case SYS_YIELD:	Threads_Yield();	break;
 	
 	// -- Clone the current thread
 	case SYS_CLONE:
 		// Call clone system call
 		ret = Proc_Clone(&err, Regs->Arg1);
 		// Change user stack if requested
-		if(ret == 0 && Regs->Arg2)
+		if(ret == 0 && !(Regs->Arg2 & CLONE_VM))
 			Regs->StackPointer = Regs->Arg2;
 		break;
 	
@@ -53,22 +68,32 @@ void SyscallHandler(tSyscallRegs *Regs)
 		ret = -1;
 		break;
 	
+	// -- Wait for a thread
+	case SYS_WAITTID:
+		ret = Threads_WaitTID(Regs->Arg1, (void*)Regs->Arg2);
+		break;
+	
+	// -- Get the physical address of a page
 	case SYS_GETPHYS:
 		ret = MM_GetPhysAddr(Regs->Arg1);
 		break;
+	
 	// -- Map an address
 	case SYS_MAP:	MM_Map(Regs->Arg1, Regs->Arg2);	break;
+	
 	// -- Allocate an address
 	case SYS_ALLOCATE:	ret = MM_Allocate(Regs->Arg1);	break;
+	
 	// -- Unmap an address
 	case SYS_UNMAP:		MM_Deallocate(Regs->Arg1);	break;
 	
 	// -- Get Thread/Process IDs
-	case SYS_GETTID:	ret = gCurrentThread->TID;	break;
-	case SYS_GETPID:	ret = gCurrentThread->TGID;	break;
+	case SYS_GETTID:	ret = Threads_GetTID();	break;
+	case SYS_GETPID:	ret = Threads_GetPID();	break;
+	
 	// -- Get User/Group IDs
-	case SYS_GETUID:	ret = gCurrentThread->UID;	break;
-	case SYS_GETGID:	ret = gCurrentThread->GID;	break;
+	case SYS_GETUID:	ret = Threads_GetUID();	break;
+	case SYS_GETGID:	ret = Threads_GetGID();	break;
 	
 	// -- Send Message
 	case SYS_SENDMSG:
@@ -83,16 +108,7 @@ void SyscallHandler(tSyscallRegs *Regs)
 	case SYS_SETNAME:
 		// Sanity Check
 		if(!Regs->Arg1) {	ret = -1;	err = -EINVAL;	break;	}
-		// Lock Process
-		LOCK( &gCurrentThread->IsLocked );
-		// Free old name
-		if(gCurrentThread->ThreadName && (Uint)gCurrentThread->ThreadName > 0xE0800000)
-			free(gCurrentThread->ThreadName);
-		// Change name
-		gCurrentThread->ThreadName = malloc( strlen( (char*)Regs->Arg1 ) + 1 );
-		strcpy(gCurrentThread->ThreadName, (char*)Regs->Arg1);
-		// Unlock
-		RELEASE( &gCurrentThread->IsLocked );
+		Threads_SetName( (void*)Regs->Arg1 );
 		break;
 	
 	// ---
@@ -132,6 +148,39 @@ void SyscallHandler(tSyscallRegs *Regs)
 		#endif
 		break;
 	
+	case SYS_FINFO:
+		ret = VFS_FInfo( Regs->Arg1, (void*)Regs->Arg2, Regs->Arg3 );
+		break;
+	
+	// Get ACL Value
+	case SYS_GETACL:
+		if( !Syscall_Valid(8, Regs->Arg1) ) {
+			err = -EINVAL;
+			ret = -1;
+			break;
+		}
+		ret = VFS_GetACL( Regs->Arg1, (void*)Regs->Arg2 );
+		break;
+	
+	// Read Directory
+	case SYS_READDIR:
+		if( !Syscall_ValidString(Regs->Arg2) ) {
+			err = -EINVAL;
+			ret = -1;
+			break;
+		}
+		ret = VFS_ReadDir( Regs->Arg1, (void*)Regs->Arg2 );
+		break;
+	
+	// Change Directory
+	case SYS_CHDIR:
+		if( !Syscall_ValidString(Regs->Arg1) ) {
+			err = -EINVAL;
+			ret = -1;
+			break;
+		}
+		ret = VFS_ChDir( (void*)Regs->Arg1 );
+		break;
 	
 	// -- Debug
 	case SYS_DEBUG:
@@ -143,7 +192,7 @@ void SyscallHandler(tSyscallRegs *Regs)
 	default:
 		Warning("SyscallHandler: Unknown System Call %i", Regs->Num);
 		if(Regs->Num < NUM_SYSCALLS)
-			Warning(" Syscall %s", cSYSCALL_NAMES[Regs->Num]);
+			Warning(" Syscall '%s'", cSYSCALL_NAMES[Regs->Num]);
 		err = -ENOSYS;
 		ret = -1;
 		break;
@@ -161,3 +210,36 @@ void SyscallHandler(tSyscallRegs *Regs)
 	#endif
 }
 
+/**
+ * \fn int Syscall_ValidString(Uint Addr)
+ * \brief Checks if a memory address contains a valid string
+ */
+int Syscall_ValidString(Uint Addr)
+{
+	// Check 1st page
+	if(!MM_GetPhysAddr(Addr))	return 0;
+	
+	// Traverse String
+	while(*(char*)Addr)
+	{
+		if(!MM_GetPhysAddr(Addr))	return 0;
+		// Increment string pointer
+		Addr ++;
+	}
+	
+	return 1;
+}
+
+/**
+ * \fn int Syscall_Valid(int Size, Uint Addr)
+ * \brief Checks if a memory address is valid
+ */
+int Syscall_Valid(int Size, Uint Addr)
+{
+	while(Size--)
+	{
+		if(!MM_GetPhysAddr(Addr))	return 0;
+		Addr ++;
+	}
+	return 1;
+}