X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Fsyscalls.c;h=d629ae4e8e16fb215b24211cb9921b24355c4990;hb=HEAD;hp=b0329836d6e8447f3e1438233d936dc561fdc589;hpb=9096ba960349e39b44a7053a753d20bce726710c;p=tpg%2Facess2.git

diff --git a/Kernel/syscalls.c b/Kernel/syscalls.c
deleted file mode 100644
index b0329836..00000000
--- a/Kernel/syscalls.c
+++ /dev/null
@@ -1,396 +0,0 @@
-/*
- * AcessOS Microkernel Version
- * syscalls.c
- */
-#define DEBUG	0
-
-#include <acess.h>
-#include <syscalls.h>
-#include <proc.h>
-#include <errno.h>
-#include <threads.h>
-
-#define CHECK_NUM_NULLOK(v,size)	\
-	if((v)&&!Syscall_Valid((size),(Uint)(v))){ret=-1;err=-EINVAL;break;}
-#define CHECK_STR_NULLOK(v)	\
-	if((v)&&!Syscall_ValidString((Uint)(v))){ret=-1;err=-EINVAL;break;}
-#define CHECK_NUM_NONULL(v,size)	\
-	if(!(v)||!Syscall_Valid((size),(Uint)(v))){ret=-1;err=-EINVAL;break;}
-#define CHECK_STR_NONULL(v)	\
-	if(!(v)||!Syscall_ValidString((Uint)(v))){ret=-1;err=-EINVAL;break;}
-
-// === IMPORTS ===
-extern int	Proc_Execve(char *File, char **ArgV, char **EnvP);
-extern Uint	Binary_Load(char *file, Uint *entryPoint);
-
-// === PROTOTYPES ===
-void	SyscallHandler(tSyscallRegs *Regs);
- 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 = -EOK;
-	 int	callNum = Regs->Num;
-	
-	#if DEBUG < 2
-	if(callNum != SYS_READ && callNum != SYS_WRITE) {
-	#endif
-	ENTER("iThread iNum", Threads_GetTID(), callNum);
-	if(callNum < NUM_SYSCALLS)
-		LOG("Syscall %s", cSYSCALL_NAMES[callNum]);
-	LOG("Arg1: 0x%x, Arg2: 0x%x, Arg3: 0x%x, Arg4: 0x%x", Regs->Arg1, Regs->Arg2, Regs->Arg3, Regs->Arg4);
-	#if DEBUG < 2
-	}
-	#endif
-	
-	switch(Regs->Num)
-	{
-	// -- Exit the current thread
-	case SYS_EXIT:	Threads_Exit(0, Regs->Arg1);	break;
-	
-	// -- Put the current thread to sleep
-	case SYS_SLEEP:	Threads_Sleep();	break;
-	
-	// -- 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
-		ret = Proc_Clone(&err, Regs->Arg1);
-		// Change user stack if a new stack address is passed
-		if(ret == 0 && Regs->Arg2)
-			Regs->StackPointer = Regs->Arg2;
-		break;
-	
-	// -- Send a signal
-	case SYS_KILL:
-		err = -ENOSYS;
-		ret = -1;
-		break;
-	
-	// -- Wait for a thread
-	case SYS_WAITTID:
-		// Sanity Check (Status can be NULL)
-		CHECK_NUM_NULLOK( Regs->Arg2, sizeof(int) );
-		// TID, *Status
-		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 = Threads_GetTID();	break;
-	case SYS_GETPID:	ret = Threads_GetPID();	break;
-	
-	// -- Get User/Group IDs
-	case SYS_GETUID:	ret = Threads_GetUID();	break;
-	case SYS_GETGID:	ret = Threads_GetGID();	break;
-	
-	// -- Set User/Group IDs
-	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:
-		CHECK_NUM_NONULL(Regs->Arg3, Regs->Arg2);
-		// Destination, Size, *Data
-		ret = Proc_SendMessage(&err, Regs->Arg1, Regs->Arg2, (void*)Regs->Arg3);
-		break;
-	// -- Check for messages
-	case SYS_GETMSG:
-		CHECK_NUM_NULLOK(Regs->Arg1, sizeof(Uint));
-		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;
-	
-	// -- Get the current timestamp
-	case SYS_GETTIME:
-		ret = now();
-		break;
-	
-	// -- Set the thread's name
-	case SYS_SETNAME:
-		CHECK_STR_NONULL(Regs->Arg1);
-		Threads_SetName( (char*)Regs->Arg1 );
-		break;
-	
-	// ---
-	// Binary Control
-	// ---
-	// -- Replace the current process with another
-	case SYS_EXECVE:
-		CHECK_STR_NONULL(Regs->Arg1);
-		// Check the argument arrays
-		{
-			 int	i;
-			char	**tmp = (char**)Regs->Arg2;
-			// Check ArgV (traverse array checking all string pointers)
-			CHECK_NUM_NONULL( tmp, sizeof(char**) );
-			//Log("tmp = %p", tmp);
-			for(i=0;tmp[i];i++) {
-				CHECK_NUM_NONULL( &tmp[i], sizeof(char*) );
-				CHECK_STR_NONULL( tmp[i] );
-			}
-			// Check EnvP also
-			// - EnvP can be NULL
-			if( Regs->Arg3 )
-			{
-				tmp = (char**)Regs->Arg3;
-				//Log("tmp = %p", tmp);
-				for(i=0;tmp[i];i++) {
-					CHECK_NUM_NULLOK( &tmp[i], sizeof(char*) );
-					CHECK_STR_NONULL( tmp[i] );
-				}
-			}
-		}
-		LEAVE('s', "Assuming 0");
-		// Path, **Argv, **Envp
-		ret = Proc_Execve( (char*)Regs->Arg1, (char**)Regs->Arg2, (char**)Regs->Arg3 );
-		break;
-	// -- Load a binary into the current process
-	case SYS_LOADBIN:
-		if( !Syscall_ValidString(Regs->Arg1)
-		||  !Syscall_Valid(sizeof(Uint), Regs->Arg2) ) {
-			err = -EINVAL;
-			ret = 0;
-			break;
-		}
-		// Path, *Entrypoint
-		ret = Binary_Load((char*)Regs->Arg1, (Uint*)Regs->Arg2);
-		break;
-	
-	// ---
-	// Virtual Filesystem
-	// ---
-	case SYS_OPEN:
-		if( !Syscall_ValidString(Regs->Arg1) ) {
-			err = -EINVAL;
-			ret = -1;
-			break;
-		}
-		LOG("VFS_Open(\"%s\", 0x%x)", (char*)Regs->Arg1, Regs->Arg2 | VFS_OPENFLAG_USER);
-		ret = VFS_Open((char*)Regs->Arg1, Regs->Arg2 | VFS_OPENFLAG_USER);
-		break;
-	
-	case SYS_CLOSE:
-		LOG("VFS_Close(%i)", Regs->Arg1);
-		VFS_Close( Regs->Arg1 );
-		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:
-		ret = VFS_Tell( Regs->Arg1 );
-		break;
-	
-	case SYS_WRITE:
-		CHECK_NUM_NONULL( Regs->Arg3, Regs->Arg2 );
-		ret = VFS_Write( Regs->Arg1, Regs->Arg2, (void*)Regs->Arg3 );
-		break;
-	
-	case SYS_READ:
-		CHECK_NUM_NONULL( Regs->Arg3, Regs->Arg2 );
-		ret = VFS_Read( Regs->Arg1, Regs->Arg2, (void*)Regs->Arg3 );
-		break;
-	
-	case SYS_FINFO:
-		CHECK_NUM_NONULL( Regs->Arg2, sizeof(tFInfo) + Regs->Arg3*sizeof(tVFS_ACL) );
-		// FP, Dest, MaxACLs
-		ret = VFS_FInfo( Regs->Arg1, (void*)Regs->Arg2, Regs->Arg3 );
-		break;
-	
-	// Get ACL Value
-	case SYS_GETACL:
-		if( !Syscall_Valid(sizeof(tVFS_ACL), Regs->Arg1) ) {
-			err = -EINVAL;
-			ret = -1;
-			break;
-		}
-		ret = VFS_GetACL( Regs->Arg1, (void*)Regs->Arg2 );
-		break;
-	
-	// Read Directory
-	case SYS_READDIR:
-		// TODO: What if the filename is longer?
-		// Maybe force it to be a 256 byte buffer
-		if( !Syscall_Valid(8, Regs->Arg2) ) {
-			err = -EINVAL;
-			ret = -1;
-			break;
-		}
-		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) ) {
-			err = -EINVAL;
-			ret = -1;
-			break;
-		}
-		ret = VFS_ChDir( (void*)Regs->Arg1 );
-		break;
-	
-	// IO Control
-	case SYS_IOCTL:
-		// All sanity checking should be done by the driver
-		ret = VFS_IOCtl( Regs->Arg1, Regs->Arg2, (void*)Regs->Arg3 );
-		break;
-	
-	// Mount a filesystem
-	case SYS_MOUNT:
-		// Only root can mount filesystems
-		if(Threads_GetUID() != 0) {
-			err = -EACCES;
-			ret = -1;
-			break;
-		}
-		// Sanity check the paths
-		if(!Syscall_ValidString(Regs->Arg1)
-		|| !Syscall_ValidString(Regs->Arg2)
-		|| !Syscall_ValidString(Regs->Arg3)
-		|| !Syscall_ValidString(Regs->Arg4) ) {
-			err = -EINVAL;
-			ret = -1;
-			break;
-		}
-		ret = VFS_Mount(
-			(char*)Regs->Arg1,	// Device
-			(char*)Regs->Arg2,	// Mount point
-			(char*)Regs->Arg3,	// Filesystem
-			(char*)Regs->Arg4	// Options
-			);
-		break;
-		
-	// Wait on a set of handles
-	case SYS_SELECT:
-		// Sanity checks
-		if( (Regs->Arg2 && !Syscall_Valid(sizeof(fd_set), Regs->Arg2))
-		 || (Regs->Arg3 && !Syscall_Valid(sizeof(fd_set), Regs->Arg3))
-		 || (Regs->Arg4 && !Syscall_Valid(sizeof(fd_set), Regs->Arg4))
-		 || (Regs->Arg5 && !Syscall_Valid(sizeof(tTime), Regs->Arg5)) )
-		{
-			err = -EINVAL;
-			ret = -1;
-			break;
-		}
-		// Perform the call
-		ret = VFS_Select(
-			Regs->Arg1,	// Max handle
-			(fd_set *)Regs->Arg2,	// Read
-			(fd_set *)Regs->Arg3,	// Write
-			(fd_set *)Regs->Arg4,	// Errors
-			(tTime *)Regs->Arg5,	// Timeout
-			0	// User handles
-			);
-		break;
-	
-	// -- Debug
-	//#if DEBUG_BUILD
-	case SYS_DEBUG:
-		LogF("Log: [%i] ", Threads_GetTID());
-		LogF((char*)Regs->Arg1,
-			Regs->Arg2, Regs->Arg3, Regs->Arg4, Regs->Arg5, Regs->Arg6);
-		LogF("\n");
-		break;
-	//#endif
-	
-	// -- Default (Return Error)
-	default:
-		Warning("SyscallHandler: Unknown System Call %i", Regs->Num);
-		if(Regs->Num < NUM_SYSCALLS)
-			Warning(" Syscall '%s'", cSYSCALL_NAMES[Regs->Num]);
-		err = -ENOSYS;
-		ret = -1;
-		break;
-	}
-	
-	if(err != 0) {
-		LOG("ID: %i, Return errno = %i", Regs->Num, err);
-	}
-	
-	#if BITS < 64
-	Regs->Return = ret&0xFFFFFFFF;
-	Regs->RetHi = ret >> 32;
-	#else
-	Regs->Return = ret;
-	#endif
-	Regs->Error = err;
-	#if DEBUG
-	# if DEBUG < 2
-	if( callNum != SYS_READ && callNum != SYS_WRITE ) {
-	# endif
-	LOG("err = %i", err);
-	if(Regs->Num != SYS_EXECVE)
-		LEAVE('x', ret);
-	else
-		LOG("Actual %i", ret);
-	# if DEBUG < 2
-	}
-	# endif
-	#endif
-}
-
-/**
- * \fn int Syscall_ValidString(Uint Addr)
- * \brief Checks if a memory address contains a valid string
- */
-int Syscall_ValidString(Uint Addr)
-{
-	// Check if the memory is user memory
-	if(!MM_IsUser(Addr))	return 0;
-	
-	return CheckString( (char*)Addr );
-}
-
-/**
- * \fn int Syscall_Valid(int Size, Uint Addr)
- * \brief Checks if a memory address is valid
- */
-int Syscall_Valid(int Size, Uint Addr)
-{
-	if(!MM_IsUser(Addr))	return 0;
-	
-	return CheckMem( (void*)Addr, Size );
-}