diff options
Diffstat (limited to 'arch/mn10300/kernel/sys_mn10300.c')
| -rw-r--r-- | arch/mn10300/kernel/sys_mn10300.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/arch/mn10300/kernel/sys_mn10300.c b/arch/mn10300/kernel/sys_mn10300.c new file mode 100644 index 00000000000..5f17a1ebc82 --- /dev/null +++ b/arch/mn10300/kernel/sys_mn10300.c @@ -0,0 +1,193 @@ +/* MN10300 Weird system calls + * + * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd. + * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#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/utsname.h> +#include <linux/syscalls.h> +#include <linux/tty.h> + +#include <asm/uaccess.h> + +#define MIN_MAP_ADDR PAGE_SIZE /* minimum fixed mmap address */ + +/* + * sys_pipe() is the normal C calling standard for creating + * a pipe. It's not the way Unix traditionally does this, though. + */ +asmlinkage long sys_pipe(unsigned long __user *fildes) +{ + int fd[2]; + int error; + + error = do_pipe(fd); + if (!error) { + if (copy_to_user(fildes, fd, 2 * sizeof(int))) + error = -EFAULT; + } + return error; +} + +/* + * memory mapping syscall + */ +asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff) +{ + struct file *file = NULL; + long error = -EINVAL; + + flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); + + if (flags & MAP_FIXED && addr < MIN_MAP_ADDR) + goto out; + + error = -EBADF; + 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 long old_mmap(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long offset) +{ + if (offset & ~PAGE_MASK) + return -EINVAL; + return sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); +} + +struct sel_arg_struct { + unsigned long n; + fd_set *inp; + fd_set *outp; + fd_set *exp; + struct timeval *tvp; +}; + +asmlinkage int old_select(struct sel_arg_struct __user *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 long 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 * __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: + switch (version) { + default: { + ulong raddr; + ret = do_shmat(first, (char __user *) 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 do_shmat(first, (char __user *) ptr, second, + (ulong *) 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 -EINVAL; + } +} |