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1624 |
jcastillo |
/*
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* linux/arch/ppc/kernel/sys_ppc.c
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*
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* Adapted from the i386 version by Gary Thomas
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*
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* This file contains various random system calls that
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* have a non-standard calling sequence on the Linux/PPC
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* platform.
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/stat.h>
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#include <linux/mman.h>
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/*
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* sys_pipe() is the normal C calling standard for creating
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* a pipe. It's not the way unix traditionally does this, though.
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*/
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asmlinkage int sys_pipe(unsigned long * fildes)
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{
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int error;
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error = verify_area(VERIFY_WRITE,fildes,8);
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if (error)
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return error;
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error = do_pipe(fildes);
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if (error)
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return error;
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return 0;
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}
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asmlinkage unsigned long sys_mmap(unsigned long addr, size_t len, int prot,
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int flags, int fd, off_t offset)
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{
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struct file * file = NULL;
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if (!(flags & MAP_ANONYMOUS)) {
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if (fd >= NR_OPEN || !(file = current->files->fd[fd]))
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return -EBADF;
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}
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flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
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return do_mmap(file, addr, len, prot, flags, offset);
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}
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#if 0
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/*
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* Perform the select(nd, in, out, ex, tv) and mmap() system
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* calls. Linux/i386 didn't use to be able to handle more than
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* 4 system call parameters, so these system calls used a memory
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* block for parameter passing..
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*/
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asmlinkage int old_mmap(unsigned long *buffer)
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{
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int error;
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unsigned long flags;
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struct file * file = NULL;
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error = verify_area(VERIFY_READ, buffer, 6*sizeof(long));
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if (error)
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return error;
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flags = get_user(buffer+3);
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if (!(flags & MAP_ANONYMOUS)) {
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unsigned long fd = get_user(buffer+4);
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if (fd >= NR_OPEN || !(file = current->files->fd[fd]))
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return -EBADF;
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}
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flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
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return do_mmap(file, get_user(buffer), get_user(buffer+1),
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get_user(buffer+2), flags, get_user(buffer+5));
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}
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extern asmlinkage int sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
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asmlinkage int old_select(unsigned long *buffer)
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{
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int n;
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fd_set *inp;
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fd_set *outp;
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fd_set *exp;
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struct timeval *tvp;
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n = verify_area(VERIFY_READ, buffer, 5*sizeof(unsigned long));
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if (n)
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return n;
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n = get_user(buffer);
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inp = (fd_set *) get_user(buffer+1);
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outp = (fd_set *) get_user(buffer+2);
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exp = (fd_set *) get_user(buffer+3);
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tvp = (struct timeval *) get_user(buffer+4);
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return sys_select(n, inp, outp, exp, tvp);
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}
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/*
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* sys_ipc() is the de-multiplexer for the SysV IPC calls..
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*
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* This is really horribly ugly.
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*/
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asmlinkage int sys_ipc (uint call, int first, int second, int third, void *ptr, long fifth)
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{
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int version;
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version = call >> 16; /* hack for backward compatibility */
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call &= 0xffff;
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if (call <= SEMCTL)
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switch (call) {
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case SEMOP:
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return sys_semop (first, (struct sembuf *)ptr, second);
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case SEMGET:
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return sys_semget (first, second, third);
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case SEMCTL: {
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union semun fourth;
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int err;
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if (!ptr)
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return -EINVAL;
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if ((err = verify_area (VERIFY_READ, ptr, sizeof(long))))
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return err;
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fourth.__pad = (void *) get_fs_long(ptr);
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return sys_semctl (first, second, third, fourth);
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}
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default:
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return -EINVAL;
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}
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if (call <= MSGCTL)
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switch (call) {
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case MSGSND:
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return sys_msgsnd (first, (struct msgbuf *) ptr,
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second, third);
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case MSGRCV:
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switch (version) {
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case 0: {
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struct ipc_kludge tmp;
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int err;
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if (!ptr)
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return -EINVAL;
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if ((err = verify_area (VERIFY_READ, ptr, sizeof(tmp))))
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return err;
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memcpy_fromfs (&tmp,(struct ipc_kludge *) ptr,
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sizeof (tmp));
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return sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp, third);
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}
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case 1: default:
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return sys_msgrcv (first, (struct msgbuf *) ptr, second, fifth, third);
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}
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case MSGGET:
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return sys_msgget ((key_t) first, second);
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case MSGCTL:
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return sys_msgctl (first, second, (struct msqid_ds *) ptr);
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default:
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return -EINVAL;
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}
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if (call <= SHMCTL)
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switch (call) {
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case SHMAT:
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switch (version) {
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case 0: default: {
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ulong raddr;
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int err;
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if ((err = verify_area(VERIFY_WRITE, (ulong*) third, sizeof(ulong))))
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return err;
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err = sys_shmat (first, (char *) ptr, second, &raddr);
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if (err)
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return err;
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put_fs_long (raddr, (ulong *) third);
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return 0;
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}
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case 1: /* iBCS2 emulator entry point */
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if (get_fs() != get_ds())
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return -EINVAL;
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return sys_shmat (first, (char *) ptr, second, (ulong *) third);
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}
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case SHMDT:
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return sys_shmdt ((char *)ptr);
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case SHMGET:
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return sys_shmget (first, second, third);
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case SHMCTL:
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return sys_shmctl (first, second, (struct shmid_ds *) ptr);
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default:
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return -EINVAL;
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}
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return -EINVAL;
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}
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#endif
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