patch-2.3.16 linux/arch/sh/kernel/sys_sh.c

• Lines: 250
• Date: Mon Aug 30 18:12:59 1999
• Orig file: v2.3.15/linux/arch/sh/kernel/sys_sh.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.15/linux/arch/sh/kernel/sys_sh.c linux/arch/sh/kernel/sys_sh.c
@@ -0,0 +1,249 @@
+/*
+ * linux/arch/i386/kernel/sys_i386.c
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/i386
+ * platform.
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/stat.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+
+#include <asm/uaccess.h>
+#include <asm/ipc.h>
+
+/*
+ * sys_pipe() is the normal C calling standard for creating
+ * a pipe. It's not the way Unix traditionally does this, though.
+ */
+asmlinkage int sys_pipe(unsigned long * fildes)
+{
+	int fd[2];
+	int error;
+
+	lock_kernel();
+	error = do_pipe(fd);
+	unlock_kernel();
+	if (!error) {
+		if (copy_to_user(fildes, fd, 2*sizeof(int)))
+			error = -EFAULT;
+	}
+	return error;
+}
+
+/*
+ * Perform the select(nd, in, out, ex, tv) and mmap() system
+ * calls. Linux/i386 didn't use to be able to handle more than
+ * 4 system call parameters, so these system calls used a memory
+ * block for parameter passing..
+ */
+
+struct mmap_arg_struct {
+	unsigned long addr;
+	unsigned long len;
+	unsigned long prot;
+	unsigned long flags;
+	unsigned long fd;
+	unsigned long offset;
+};
+
+asmlinkage int old_mmap(struct mmap_arg_struct *arg)
+{
+	int error = -EFAULT;
+	struct file * file = NULL;
+	struct mmap_arg_struct a;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+
+	down(&current->mm->mmap_sem);
+	lock_kernel();
+	if (!(a.flags & MAP_ANONYMOUS)) {
+		error = -EBADF;
+		file = fget(a.fd);
+		if (!file)
+			goto out;
+	}
+	a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+
+	error = do_mmap(file, a.addr, a.len, a.prot, a.flags, a.offset);
+	if (file)
+		fput(file);
+out:
+	unlock_kernel();
+	up(&current->mm->mmap_sem);
+	return error;
+}
+
+extern asmlinkage int sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
+
+struct sel_arg_struct {
+	unsigned long n;
+	fd_set *inp, *outp, *exp;
+	struct timeval *tvp;
+};
+
+asmlinkage int old_select(struct sel_arg_struct *arg)
+{
+	struct sel_arg_struct a;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+	/* sys_select() does the appropriate kernel locking */
+	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
+}
+
+/*
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls..
+ *
+ * This is really horribly ugly.
+ */
+asmlinkage int sys_ipc (uint call, int first, int second,
+			int third, void *ptr, long fifth)
+{
+	int version, ret;
+
+	version = call >> 16; /* hack for backward compatibility */
+	call &= 0xffff;
+
+	if (call <= SEMCTL)
+		switch (call) {
+		case SEMOP:
+			return sys_semop (first, (struct sembuf *)ptr, second);
+		case SEMGET:
+			return sys_semget (first, second, third);
+		case SEMCTL: {
+			union semun fourth;
+			if (!ptr)
+				return -EINVAL;
+			if (get_user(fourth.__pad, (void **) ptr))
+				return -EFAULT;
+			return sys_semctl (first, second, third, fourth);
+			}
+		default:
+			return -EINVAL;
+		}
+
+	if (call <= MSGCTL) 
+		switch (call) {
+		case MSGSND:
+			return sys_msgsnd (first, (struct msgbuf *) ptr, 
+					  second, third);
+		case MSGRCV:
+			switch (version) {
+			case 0: {
+				struct ipc_kludge tmp;
+				if (!ptr)
+					return -EINVAL;
+				
+				if (copy_from_user(&tmp,
+						   (struct ipc_kludge *) ptr, 
+						   sizeof (tmp)))
+					return -EFAULT;
+				return sys_msgrcv (first, tmp.msgp, second,
+						   tmp.msgtyp, third);
+				}
+			default:
+				return sys_msgrcv (first,
+						   (struct msgbuf *) ptr,
+						   second, fifth, third);
+			}
+		case MSGGET:
+			return sys_msgget ((key_t) first, second);
+		case MSGCTL:
+			return sys_msgctl (first, second,
+					   (struct msqid_ds *) ptr);
+		default:
+			return -EINVAL;
+		}
+	if (call <= SHMCTL) 
+		switch (call) {
+		case SHMAT:
+			switch (version) {
+			default: {
+				ulong raddr;
+				ret = sys_shmat (first, (char *) ptr,
+						 second, &raddr);
+				if (ret)
+					return ret;
+				return put_user (raddr, (ulong *) third);
+			}
+			case 1:	/* iBCS2 emulator entry point */
+				if (!segment_eq(get_fs(), get_ds()))
+					return -EINVAL;
+				return sys_shmat (first, (char *) ptr,
+						  second, (ulong *) third);
+			}
+		case SHMDT: 
+			return sys_shmdt ((char *)ptr);
+		case SHMGET:
+			return sys_shmget (first, second, third);
+		case SHMCTL:
+			return sys_shmctl (first, second,
+					   (struct shmid_ds *) ptr);
+		default:
+			return -EINVAL;
+		}
+	
+	return -EINVAL;
+}
+
+/*
+ * Old cruft
+ */
+asmlinkage int sys_uname(struct old_utsname * name)
+{
+	int err;
+	if (!name)
+		return -EFAULT;
+	down(&uts_sem);
+	err=copy_to_user(name, &system_utsname, sizeof (*name));
+	up(&uts_sem);
+	return err?-EFAULT:0;
+}
+
+asmlinkage int sys_olduname(struct oldold_utsname * name)
+{
+	int error;
+
+	if (!name)
+		return -EFAULT;
+	if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
+		return -EFAULT;
+  
+  	down(&uts_sem);
+	
+	error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
+	error |= __put_user(0,name->sysname+__OLD_UTS_LEN);
+	error |= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
+	error |= __put_user(0,name->nodename+__OLD_UTS_LEN);
+	error |= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
+	error |= __put_user(0,name->release+__OLD_UTS_LEN);
+	error |= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
+	error |= __put_user(0,name->version+__OLD_UTS_LEN);
+	error |= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
+	error |= __put_user(0,name->machine+__OLD_UTS_LEN);
+	
+	up(&uts_sem);
+	
+	error = error ? -EFAULT : 0;
+
+	return error;
+}
+
+asmlinkage int sys_pause(void)
+{
+	current->state = TASK_INTERRUPTIBLE;
+	schedule();
+	return -ERESTARTNOHAND;
+}