diff options
Diffstat (limited to 'arch/cris/kernel/sys_cris.c')
| -rw-r--r-- | arch/cris/kernel/sys_cris.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/arch/cris/kernel/sys_cris.c b/arch/cris/kernel/sys_cris.c new file mode 100644 index 00000000000..0aa0e0ebb3a --- /dev/null +++ b/arch/cris/kernel/sys_cris.c @@ -0,0 +1,174 @@ +/* $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 <asm/uaccess.h> +#include <asm/ipc.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; + } +} |