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Diffstat (limited to 'arch/s390/kernel/sys_s390.c')
-rw-r--r--arch/s390/kernel/sys_s390.c270
1 files changed, 270 insertions, 0 deletions
diff --git a/arch/s390/kernel/sys_s390.c b/arch/s390/kernel/sys_s390.c
new file mode 100644
index 00000000000..efe6b83b53f
--- /dev/null
+++ b/arch/s390/kernel/sys_s390.c
@@ -0,0 +1,270 @@
+/*
+ * arch/s390/kernel/sys_s390.c
+ *
+ * S390 version
+ * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ * Thomas Spatzier (tspat@de.ibm.com)
+ *
+ * Derived from "arch/i386/kernel/sys_i386.c"
+ *
+ * This file contains various random system calls that
+ * have a non-standard calling sequence on the Linux/s390
+ * platform.
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.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/syscalls.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+#ifdef CONFIG_ARCH_S390X
+#include <linux/personality.h>
+#endif /* CONFIG_ARCH_S390X */
+
+#include <asm/uaccess.h>
+#include <asm/ipc.h>
+
+/*
+ * 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;
+}
+
+/* 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)
+{
+ long error = -EBADF;
+ struct file * file = NULL;
+
+ flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+ if (!(flags & MAP_ANONYMOUS)) {
+ file = fget(fd);
+ if (!file)
+ goto out;
+ }
+
+ down_write(&current->mm->mmap_sem);
+ error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+ up_write(&current->mm->mmap_sem);
+
+ if (file)
+ fput(file);
+out:
+ return error;
+}
+
+/*
+ * Perform the select(nd, in, out, ex, tv) and mmap() system
+ * calls. Linux for S/390 isn't able to handle more than 5
+ * system call parameters, so these system calls used a memory
+ * block for parameter passing..
+ */
+
+struct mmap_arg_struct {
+ unsigned long addr;
+ unsigned long len;
+ unsigned long prot;
+ unsigned long flags;
+ unsigned long fd;
+ unsigned long offset;
+};
+
+asmlinkage long sys_mmap2(struct mmap_arg_struct __user *arg)
+{
+ struct mmap_arg_struct a;
+ int error = -EFAULT;
+
+ if (copy_from_user(&a, arg, sizeof(a)))
+ goto out;
+ error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
+out:
+ return error;
+}
+
+asmlinkage long old_mmap(struct mmap_arg_struct __user *arg)
+{
+ struct mmap_arg_struct a;
+ long error = -EFAULT;
+
+ if (copy_from_user(&a, arg, sizeof(a)))
+ goto out;
+
+ error = -EINVAL;
+ if (a.offset & ~PAGE_MASK)
+ goto out;
+
+ error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
+out:
+ return error;
+}
+
+#ifndef CONFIG_ARCH_S390X
+struct sel_arg_struct {
+ unsigned long n;
+ fd_set *inp, *outp, *exp;
+ struct timeval *tvp;
+};
+
+asmlinkage long 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);
+
+}
+#endif /* CONFIG_ARCH_S390X */
+
+/*
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls..
+ *
+ * This is really horribly ugly.
+ */
+asmlinkage long sys_ipc(uint call, int first, unsigned long second,
+ unsigned long third, void __user *ptr)
+{
+ struct ipc_kludge tmp;
+ int ret;
+
+ switch (call) {
+ case SEMOP:
+ return sys_semtimedop(first, (struct sembuf __user *)ptr,
+ (unsigned)second, NULL);
+ case SEMTIMEDOP:
+ return sys_semtimedop(first, (struct sembuf __user *)ptr,
+ (unsigned)second,
+ (const struct timespec __user *) third);
+ case SEMGET:
+ return sys_semget(first, (int)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, (int)second, third, fourth);
+ }
+ case MSGSND:
+ return sys_msgsnd (first, (struct msgbuf __user *) ptr,
+ (size_t)second, third);
+ break;
+ case MSGRCV:
+ if (!ptr)
+ return -EINVAL;
+ if (copy_from_user (&tmp, (struct ipc_kludge __user *) ptr,
+ sizeof (struct ipc_kludge)))
+ return -EFAULT;
+ return sys_msgrcv (first, tmp.msgp,
+ (size_t)second, tmp.msgtyp, third);
+ case MSGGET:
+ return sys_msgget((key_t)first, (int)second);
+ case MSGCTL:
+ return sys_msgctl(first, (int)second,
+ (struct msqid_ds __user *)ptr);
+
+ case SHMAT: {
+ ulong raddr;
+ ret = do_shmat(first, (char __user *)ptr,
+ (int)second, &raddr);
+ if (ret)
+ return ret;
+ return put_user (raddr, (ulong __user *) third);
+ break;
+ }
+ case SHMDT:
+ return sys_shmdt ((char __user *)ptr);
+ case SHMGET:
+ return sys_shmget(first, (size_t)second, third);
+ case SHMCTL:
+ return sys_shmctl(first, (int)second,
+ (struct shmid_ds __user *) ptr);
+ default:
+ return -ENOSYS;
+
+ }
+
+ return -EINVAL;
+}
+
+#ifdef CONFIG_ARCH_S390X
+asmlinkage long s390x_newuname(struct new_utsname __user *name)
+{
+ int ret = sys_newuname(name);
+
+ if (current->personality == PER_LINUX32 && !ret) {
+ ret = copy_to_user(name->machine, "s390\0\0\0\0", 8);
+ if (ret) ret = -EFAULT;
+ }
+ return ret;
+}
+
+asmlinkage long s390x_personality(unsigned long personality)
+{
+ int ret;
+
+ if (current->personality == PER_LINUX32 && personality == PER_LINUX)
+ personality = PER_LINUX32;
+ ret = sys_personality(personality);
+ if (ret == PER_LINUX32)
+ ret = PER_LINUX;
+
+ return ret;
+}
+#endif /* CONFIG_ARCH_S390X */
+
+/*
+ * Wrapper function for sys_fadvise64/fadvise64_64
+ */
+#ifndef CONFIG_ARCH_S390X
+
+asmlinkage long
+s390_fadvise64(int fd, u32 offset_high, u32 offset_low, size_t len, int advice)
+{
+ return sys_fadvise64(fd, (u64) offset_high << 32 | offset_low,
+ len, advice);
+}
+
+#endif
+
+struct fadvise64_64_args {
+ int fd;
+ long long offset;
+ long long len;
+ int advice;
+};
+
+asmlinkage long
+s390_fadvise64_64(struct fadvise64_64_args __user *args)
+{
+ struct fadvise64_64_args a;
+
+ if ( copy_from_user(&a, args, sizeof(a)) )
+ return -EFAULT;
+ return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
+}
+
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