mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-19 18:24:14 +08:00
5a79859ae0
Remove the 31 bit support in order to reduce maintenance cost and
effectively remove dead code. Since a couple of years there is no
distribution left that comes with a 31 bit kernel.
The 31 bit kernel also has been broken since more than a year before
anybody noticed. In addition I added a removal warning to the kernel
shown at ipl for 5 minutes: a960062e58 ("s390: add 31 bit warning
message") which let everybody know about the plan to remove 31 bit
code. We didn't get any response.
Given that the last 31 bit only machine was introduced in 1999 let's
remove the code.
Anybody with 31 bit user space code can still use the compat mode.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
|
|
* S390 version
|
|
* Copyright IBM Corp. 1999, 2000
|
|
* 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.
|
|
*/
|
|
SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, unsigned long, second,
|
|
unsigned long, third, void __user *, ptr)
|
|
{
|
|
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);
|
|
}
|
|
|
|
SYSCALL_DEFINE1(s390_personality, unsigned int, personality)
|
|
{
|
|
unsigned int ret;
|
|
|
|
if (personality(current->personality) == PER_LINUX32 &&
|
|
personality(personality) == PER_LINUX)
|
|
personality |= PER_LINUX32;
|
|
ret = sys_personality(personality);
|
|
if (personality(ret) == PER_LINUX32)
|
|
ret &= ~PER_LINUX32;
|
|
|
|
return ret;
|
|
}
|