mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 14:46:39 +07:00
e28cbf2293
On an architecture that supports 32-bit compat we need to override the reported machine in uname with the 32-bit value. Instead of doing this separately in every architecture introduce a COMPAT_UTS_MACHINE define in <asm/compat.h> and apply it directly in sys_newuname(). Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: James Morris <jmorris@namei.org> Cc: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
204 lines
5.6 KiB
C
204 lines
5.6 KiB
C
/*
|
|
* 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/fs.h>
|
|
#include <linux/smp.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>
|
|
#include <linux/personality.h>
|
|
#include <linux/unistd.h>
|
|
#include <linux/ipc.h>
|
|
#include <asm/uaccess.h>
|
|
#include "entry.h"
|
|
|
|
/*
|
|
* 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 s390_mmap_arg_struct {
|
|
unsigned long addr;
|
|
unsigned long len;
|
|
unsigned long prot;
|
|
unsigned long flags;
|
|
unsigned long fd;
|
|
unsigned long offset;
|
|
};
|
|
|
|
SYSCALL_DEFINE1(mmap2, struct s390_mmap_arg_struct __user *, arg)
|
|
{
|
|
struct s390_mmap_arg_struct a;
|
|
int error = -EFAULT;
|
|
|
|
if (copy_from_user(&a, arg, sizeof(a)))
|
|
goto out;
|
|
error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
|
|
*
|
|
* This is really horribly ugly.
|
|
*/
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_64BIT
|
|
SYSCALL_DEFINE1(s390_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_64BIT */
|
|
|
|
/*
|
|
* Wrapper function for sys_fadvise64/fadvise64_64
|
|
*/
|
|
#ifndef CONFIG_64BIT
|
|
|
|
SYSCALL_DEFINE5(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);
|
|
}
|
|
|
|
struct fadvise64_64_args {
|
|
int fd;
|
|
long long offset;
|
|
long long len;
|
|
int advice;
|
|
};
|
|
|
|
SYSCALL_DEFINE1(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);
|
|
}
|
|
|
|
/*
|
|
* This is a wrapper to call sys_fallocate(). For 31 bit s390 the last
|
|
* 64 bit argument "len" is split into the upper and lower 32 bits. The
|
|
* system call wrapper in the user space loads the value to %r6/%r7.
|
|
* The code in entry.S keeps the values in %r2 - %r6 where they are and
|
|
* stores %r7 to 96(%r15). But the standard C linkage requires that
|
|
* the whole 64 bit value for len is stored on the stack and doesn't
|
|
* use %r6 at all. So s390_fallocate has to convert the arguments from
|
|
* %r2: fd, %r3: mode, %r4/%r5: offset, %r6/96(%r15)-99(%r15): len
|
|
* 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)
|
|
{
|
|
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
|