/* $Id: sys_cris.c,v 1.6 2004/03/11 11:38:40 starvik Exp $ * * linux/arch/cris/kernel/sys_cris.c * * This file contains various random system calls that * have a non-standard calling sequence on some platforms. * Since we don't have to do any backwards compatibility, our * versions are done in the most "normal" way possible. * */ #include <linux/errno.h> #include <linux/sched.h> #include <linux/syscalls.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/ipc.h> #include <asm/uaccess.h> #include <asm/segment.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 __user * 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; } /* common code for old and new mmaps */ static inline long do_mmap2(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long fd, unsigned long pgoff) { int error = -EBADF; struct file * file = NULL; flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); if (!(flags & MAP_ANONYMOUS)) { file = fget(fd); if (!file) goto out; } down_write(¤t->mm->mmap_sem); error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); up_write(¤t->mm->mmap_sem); if (file) fput(file); out: return error; } asmlinkage unsigned long old_mmap(unsigned long __user *args) { unsigned long buffer[6]; int err = -EFAULT; if (copy_from_user(&buffer, args, sizeof(buffer))) goto out; err = -EINVAL; if (buffer[5] & ~PAGE_MASK) /* verify that offset is on page boundary */ goto out; err = do_mmap2(buffer[0], buffer[1], buffer[2], buffer[3], buffer[4], buffer[5] >> PAGE_SHIFT); out: return err; } asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long fd, unsigned long pgoff) { return do_mmap2(addr, len, prot, flags, fd, pgoff); } /* * sys_ipc() is the de-multiplexer for the SysV IPC calls.. * * This is really horribly ugly. (same as arch/i386) */ asmlinkage int sys_ipc (uint call, int first, int second, int third, void __user *ptr, long fifth) { int version, ret; version = call >> 16; /* hack for backward compatibility */ call &= 0xffff; switch (call) { case SEMOP: return sys_semtimedop (first, (struct sembuf __user *)ptr, second, NULL); case SEMTIMEDOP: return sys_semtimedop(first, (struct sembuf __user *)ptr, second, (const struct timespec __user *)fifth); case SEMGET: return sys_semget (first, second, third); case SEMCTL: { union semun fourth; if (!ptr) return -EINVAL; if (get_user(fourth.__pad, (void * __user *) ptr)) return -EFAULT; return sys_semctl (first, second, third, fourth); } case MSGSND: return sys_msgsnd (first, (struct msgbuf __user *) 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 __user *) ptr, sizeof (tmp))) return -EFAULT; return sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp, third); } default: return sys_msgrcv (first, (struct msgbuf __user *) ptr, second, fifth, third); } case MSGGET: return sys_msgget ((key_t) first, second); case MSGCTL: return sys_msgctl (first, second, (struct msqid_ds __user *) ptr); case SHMAT: { ulong raddr; ret = do_shmat (first, (char __user *) ptr, second, &raddr); if (ret) return ret; return put_user (raddr, (ulong __user *) third); } case SHMDT: return sys_shmdt ((char __user *)ptr); case SHMGET: return sys_shmget (first, second, third); case SHMCTL: return sys_shmctl (first, second, (struct shmid_ds __user *) ptr); default: return -ENOSYS; } }