diff options
Diffstat (limited to 'arch/v850/kernel/syscalls.c')
| -rw-r--r-- | arch/v850/kernel/syscalls.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/arch/v850/kernel/syscalls.c b/arch/v850/kernel/syscalls.c new file mode 100644 index 00000000000..9224cb65f6e --- /dev/null +++ b/arch/v850/kernel/syscalls.c @@ -0,0 +1,197 @@ +/* + * arch/v850/kernel/syscalls.c -- Various system-call definitions not + * defined in machine-independent code + * + * Copyright (C) 2001,02 NEC Corporation + * Copyright (C) 2001,02 Miles Bader <miles@gnu.org> + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + * This file was derived the ppc version, arch/ppc/kernel/syscalls.c + * ... which was derived from "arch/i386/kernel/sys_i386.c" by Gary Thomas; + * modified by Cort Dougan (cort@cs.nmt.edu) + * and Paul Mackerras (paulus@cs.anu.edu.au). + */ + +#include <linux/config.h> +#include <linux/errno.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/syscalls.h> +#include <linux/sem.h> +#include <linux/msg.h> +#include <linux/shm.h> +#include <linux/stat.h> +#include <linux/mman.h> +#include <linux/sys.h> +#include <linux/ipc.h> +#include <linux/utsname.h> +#include <linux/file.h> + +#include <asm/uaccess.h> +#include <asm/ipc.h> +#include <asm/semaphore.h> + +/* + * sys_ipc() is the de-multiplexer for the SysV IPC calls.. + * + * This is really horribly ugly. + */ +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; + + ret = -EINVAL; + switch (call) { + case SEMOP: + ret = sys_semop (first, (struct sembuf *)ptr, second); + break; + case SEMGET: + ret = sys_semget (first, second, third); + break; + case SEMCTL: + { + union semun fourth; + + if (!ptr) + break; + if ((ret = access_ok(VERIFY_READ, ptr, sizeof(long)) ? 0 : -EFAULT) + || (ret = get_user(fourth.__pad, (void **)ptr))) + break; + ret = sys_semctl (first, second, third, fourth); + break; + } + case MSGSND: + ret = sys_msgsnd (first, (struct msgbuf *) ptr, second, third); + break; + case MSGRCV: + switch (version) { + case 0: { + struct ipc_kludge tmp; + + if (!ptr) + break; + if ((ret = access_ok(VERIFY_READ, ptr, sizeof(tmp)) ? 0 : -EFAULT) + || (ret = copy_from_user(&tmp, + (struct ipc_kludge *) ptr, + sizeof (tmp)))) + break; + ret = sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp, + third); + break; + } + default: + ret = sys_msgrcv (first, (struct msgbuf *) ptr, + second, fifth, third); + break; + } + break; + case MSGGET: + ret = sys_msgget ((key_t) first, second); + break; + case MSGCTL: + ret = sys_msgctl (first, second, (struct msqid_ds *) ptr); + break; + case SHMAT: + switch (version) { + default: { + ulong raddr; + + if ((ret = access_ok(VERIFY_WRITE, (ulong*) third, + sizeof(ulong)) ? 0 : -EFAULT)) + break; + ret = do_shmat (first, (char *) ptr, second, &raddr); + if (ret) + break; + ret = put_user (raddr, (ulong *) third); + break; + } + case 1: /* iBCS2 emulator entry point */ + if (!segment_eq(get_fs(), get_ds())) + break; + ret = do_shmat (first, (char *) ptr, second, + (ulong *) third); + break; + } + break; + case SHMDT: + ret = sys_shmdt ((char *)ptr); + break; + case SHMGET: + ret = sys_shmget (first, second, third); + break; + case SHMCTL: + ret = sys_shmctl (first, second, (struct shmid_ds *) ptr); + break; + } + + return ret; +} + +/* + * sys_pipe() is the normal C calling standard for creating + * a pipe. It's not the way unix traditionally does this, though. + */ +int sys_pipe (int *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; +} + +static inline unsigned long +do_mmap2 (unsigned long addr, size_t len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff) +{ + struct file * file = NULL; + int ret = -EBADF; + + flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); + if (! (flags & MAP_ANONYMOUS)) { + if (!(file = fget (fd))) + goto out; + } + + down_write (¤t->mm->mmap_sem); + ret = do_mmap_pgoff (file, addr, len, prot, flags, pgoff); + up_write (¤t->mm->mmap_sem); + if (file) + fput (file); +out: + return ret; +} + +unsigned long sys_mmap2 (unsigned long addr, size_t len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff) +{ + return do_mmap2 (addr, len, prot, flags, fd, pgoff); +} + +unsigned long sys_mmap (unsigned long addr, size_t len, + unsigned long prot, unsigned long flags, + unsigned long fd, off_t offset) +{ + int err = -EINVAL; + + if (offset & ~PAGE_MASK) + goto out; + + err = do_mmap2 (addr, len, prot, flags, fd, offset >> PAGE_SHIFT); +out: + return err; +} |