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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 | 3 | * S390 version |
a53c8fab | 4 | * Copyright IBM Corp. 1999, 2000 |
1da177e4 LT |
5 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), |
6 | * Thomas Spatzier (tspat@de.ibm.com) | |
7 | * | |
8 | * Derived from "arch/i386/kernel/sys_i386.c" | |
9 | * | |
10 | * This file contains various random system calls that | |
11 | * have a non-standard calling sequence on the Linux/s390 | |
12 | * platform. | |
13 | */ | |
14 | ||
15 | #include <linux/errno.h> | |
16 | #include <linux/sched.h> | |
17 | #include <linux/mm.h> | |
4e950f6f | 18 | #include <linux/fs.h> |
1da177e4 | 19 | #include <linux/smp.h> |
1da177e4 LT |
20 | #include <linux/sem.h> |
21 | #include <linux/msg.h> | |
22 | #include <linux/shm.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/syscalls.h> | |
25 | #include <linux/mman.h> | |
26 | #include <linux/file.h> | |
27 | #include <linux/utsname.h> | |
1da177e4 | 28 | #include <linux/personality.h> |
fe74290d | 29 | #include <linux/unistd.h> |
cba4fbbf | 30 | #include <linux/ipc.h> |
7c0f6ba6 | 31 | #include <linux/uaccess.h> |
a806170e | 32 | #include "entry.h" |
1da177e4 | 33 | |
1da177e4 | 34 | /* |
a4679373 CH |
35 | * Perform the mmap() system call. Linux for S/390 isn't able to handle more |
36 | * than 5 system call parameters, so this system call uses a memory block | |
37 | * for parameter passing. | |
1da177e4 LT |
38 | */ |
39 | ||
a4679373 | 40 | struct s390_mmap_arg_struct { |
1da177e4 LT |
41 | unsigned long addr; |
42 | unsigned long len; | |
43 | unsigned long prot; | |
44 | unsigned long flags; | |
45 | unsigned long fd; | |
46 | unsigned long offset; | |
47 | }; | |
48 | ||
a4679373 | 49 | SYSCALL_DEFINE1(mmap2, struct s390_mmap_arg_struct __user *, arg) |
1da177e4 | 50 | { |
a4679373 | 51 | struct s390_mmap_arg_struct a; |
1da177e4 LT |
52 | int error = -EFAULT; |
53 | ||
54 | if (copy_from_user(&a, arg, sizeof(a))) | |
55 | goto out; | |
f8b72560 | 56 | error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); |
1da177e4 LT |
57 | out: |
58 | return error; | |
59 | } | |
60 | ||
1da177e4 | 61 | /* |
3a3954ce | 62 | * sys_ipc() is the de-multiplexer for the SysV IPC calls. |
1da177e4 | 63 | */ |
baed7fc9 | 64 | SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, unsigned long, second, |
26689452 | 65 | unsigned long, third, void __user *, ptr) |
1da177e4 | 66 | { |
3a3954ce HC |
67 | if (call >> 16) |
68 | return -EINVAL; | |
69 | /* The s390 sys_ipc variant has only five parameters instead of six | |
70 | * like the generic variant. The only difference is the handling of | |
71 | * the SEMTIMEDOP subcall where on s390 the third parameter is used | |
72 | * as a pointer to a struct timespec where the generic variant uses | |
73 | * the fifth parameter. | |
74 | * Therefore we can call the generic variant by simply passing the | |
75 | * third parameter also as fifth parameter. | |
76 | */ | |
77 | return sys_ipc(call, first, second, third, ptr, third); | |
1da177e4 LT |
78 | } |
79 | ||
3a110370 | 80 | SYSCALL_DEFINE1(s390_personality, unsigned int, personality) |
1da177e4 | 81 | { |
3a110370 | 82 | unsigned int ret; |
1da177e4 | 83 | |
5ab37e1b JK |
84 | if (personality(current->personality) == PER_LINUX32 && |
85 | personality(personality) == PER_LINUX) | |
86 | personality |= PER_LINUX32; | |
1da177e4 | 87 | ret = sys_personality(personality); |
5ab37e1b JK |
88 | if (personality(ret) == PER_LINUX32) |
89 | ret &= ~PER_LINUX32; | |
1da177e4 LT |
90 | |
91 | return ret; | |
92 | } |