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Diffstat (limited to 'arch/s390/kernel/sys_s390.c')
-rw-r--r--arch/s390/kernel/sys_s390.c150
1 files changed, 29 insertions, 121 deletions
diff --git a/arch/s390/kernel/sys_s390.c b/arch/s390/kernel/sys_s390.c
index 86a74c9c9e6..23eb222c165 100644
--- a/arch/s390/kernel/sys_s390.c
+++ b/arch/s390/kernel/sys_s390.c
@@ -1,8 +1,6 @@
/*
- * arch/s390/kernel/sys_s390.c
- *
* S390 version
- * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Copyright IBM Corp. 1999, 2000
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
* Thomas Spatzier (tspat@de.ibm.com)
*
@@ -33,13 +31,12 @@
#include "entry.h"
/*
- * 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..
+ * Perform the mmap() system call. Linux for S/390 isn't able to handle more
+ * than 5 system call parameters, so this system call uses a memory block
+ * for parameter passing.
*/
-struct mmap_arg_struct {
+struct s390_mmap_arg_struct {
unsigned long addr;
unsigned long len;
unsigned long prot;
@@ -48,9 +45,9 @@ struct mmap_arg_struct {
unsigned long offset;
};
-SYSCALL_DEFINE1(mmap2, struct mmap_arg_struct __user *, arg)
+SYSCALL_DEFINE1(mmap2, struct s390_mmap_arg_struct __user *, arg)
{
- struct mmap_arg_struct a;
+ struct s390_mmap_arg_struct a;
int error = -EFAULT;
if (copy_from_user(&a, arg, sizeof(a)))
@@ -60,115 +57,36 @@ out:
return error;
}
-SYSCALL_DEFINE1(s390_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 = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
-out:
- return error;
-}
-
/*
- * sys_ipc() is the de-multiplexer for the SysV IPC calls..
- *
- * This is really horribly ugly.
+ * sys_ipc() is the de-multiplexer for the SysV IPC calls.
*/
-SYSCALL_DEFINE5(ipc, uint, call, int, first, unsigned long, second,
+SYSCALL_DEFINE5(s390_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;
+ if (call >> 16)
+ return -EINVAL;
+ /* The s390 sys_ipc variant has only five parameters instead of six
+ * like the generic variant. The only difference is the handling of
+ * the SEMTIMEDOP subcall where on s390 the third parameter is used
+ * as a pointer to a struct timespec where the generic variant uses
+ * the fifth parameter.
+ * Therefore we can call the generic variant by simply passing the
+ * third parameter also as fifth parameter.
+ */
+ return sys_ipc(call, first, second, third, ptr, third);
}
#ifdef CONFIG_64BIT
-SYSCALL_DEFINE1(s390_newuname, struct new_utsname __user *, name)
+SYSCALL_DEFINE1(s390_personality, unsigned int, personality)
{
- int ret = sys_newuname(name);
-
- if (personality(current->personality) == PER_LINUX32 && !ret) {
- ret = copy_to_user(name->machine, "s390\0\0\0\0", 8);
- if (ret) ret = -EFAULT;
- }
- return ret;
-}
+ unsigned int ret;
-SYSCALL_DEFINE1(s390_personality, unsigned long, personality)
-{
- int ret;
-
- if (current->personality == PER_LINUX32 && personality == PER_LINUX)
- personality = PER_LINUX32;
+ if (personality(current->personality) == PER_LINUX32 &&
+ personality(personality) == PER_LINUX)
+ personality |= PER_LINUX32;
ret = sys_personality(personality);
- if (ret == PER_LINUX32)
- ret = PER_LINUX;
+ if (personality(ret) == PER_LINUX32)
+ ret &= ~PER_LINUX32;
return ret;
}
@@ -214,19 +132,9 @@ SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, args)
* to
* %r2: fd, %r3: mode, %r4/%r5: offset, 96(%r15)-103(%r15): len
*/
-SYSCALL_DEFINE(s390_fallocate)(int fd, int mode, loff_t offset,
- u32 len_high, u32 len_low)
+SYSCALL_DEFINE5(s390_fallocate, int, fd, int, mode, loff_t, offset,
+ u32, len_high, u32, len_low)
{
return sys_fallocate(fd, mode, offset, ((u64)len_high << 32) | len_low);
}
-#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
-asmlinkage long SyS_s390_fallocate(long fd, long mode, loff_t offset,
- long len_high, long len_low)
-{
- return SYSC_s390_fallocate((int) fd, (int) mode, offset,
- (u32) len_high, (u32) len_low);
-}
-SYSCALL_ALIAS(sys_s390_fallocate, SyS_s390_fallocate);
-#endif
-
#endif
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