Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 | 2 | * S390 version |
a53c8fab | 3 | * Copyright IBM Corp. 1999, 2000 |
1da177e4 LT |
4 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), |
5 | * Thomas Spatzier (tspat@de.ibm.com) | |
6 | * | |
7 | * Derived from "arch/i386/kernel/sys_i386.c" | |
8 | * | |
9 | * This file contains various random system calls that | |
10 | * have a non-standard calling sequence on the Linux/s390 | |
11 | * platform. | |
12 | */ | |
13 | ||
14 | #include <linux/errno.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/mm.h> | |
4e950f6f | 17 | #include <linux/fs.h> |
1da177e4 | 18 | #include <linux/smp.h> |
1da177e4 LT |
19 | #include <linux/sem.h> |
20 | #include <linux/msg.h> | |
21 | #include <linux/shm.h> | |
22 | #include <linux/stat.h> | |
23 | #include <linux/syscalls.h> | |
24 | #include <linux/mman.h> | |
25 | #include <linux/file.h> | |
26 | #include <linux/utsname.h> | |
1da177e4 | 27 | #include <linux/personality.h> |
fe74290d | 28 | #include <linux/unistd.h> |
cba4fbbf | 29 | #include <linux/ipc.h> |
1da177e4 | 30 | #include <asm/uaccess.h> |
a806170e | 31 | #include "entry.h" |
1da177e4 | 32 | |
1da177e4 | 33 | /* |
a4679373 CH |
34 | * Perform the mmap() system call. Linux for S/390 isn't able to handle more |
35 | * than 5 system call parameters, so this system call uses a memory block | |
36 | * for parameter passing. | |
1da177e4 LT |
37 | */ |
38 | ||
a4679373 | 39 | struct s390_mmap_arg_struct { |
1da177e4 LT |
40 | unsigned long addr; |
41 | unsigned long len; | |
42 | unsigned long prot; | |
43 | unsigned long flags; | |
44 | unsigned long fd; | |
45 | unsigned long offset; | |
46 | }; | |
47 | ||
a4679373 | 48 | SYSCALL_DEFINE1(mmap2, struct s390_mmap_arg_struct __user *, arg) |
1da177e4 | 49 | { |
a4679373 | 50 | struct s390_mmap_arg_struct a; |
1da177e4 LT |
51 | int error = -EFAULT; |
52 | ||
53 | if (copy_from_user(&a, arg, sizeof(a))) | |
54 | goto out; | |
f8b72560 | 55 | error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); |
1da177e4 LT |
56 | out: |
57 | return error; | |
58 | } | |
59 | ||
1da177e4 | 60 | /* |
3a3954ce | 61 | * sys_ipc() is the de-multiplexer for the SysV IPC calls. |
1da177e4 | 62 | */ |
baed7fc9 | 63 | SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, unsigned long, second, |
26689452 | 64 | unsigned long, third, void __user *, ptr) |
1da177e4 | 65 | { |
3a3954ce HC |
66 | if (call >> 16) |
67 | return -EINVAL; | |
68 | /* The s390 sys_ipc variant has only five parameters instead of six | |
69 | * like the generic variant. The only difference is the handling of | |
70 | * the SEMTIMEDOP subcall where on s390 the third parameter is used | |
71 | * as a pointer to a struct timespec where the generic variant uses | |
72 | * the fifth parameter. | |
73 | * Therefore we can call the generic variant by simply passing the | |
74 | * third parameter also as fifth parameter. | |
75 | */ | |
76 | return sys_ipc(call, first, second, third, ptr, third); | |
1da177e4 LT |
77 | } |
78 | ||
347a8dc3 | 79 | #ifdef CONFIG_64BIT |
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 | } | |
347a8dc3 | 93 | #endif /* CONFIG_64BIT */ |
1da177e4 LT |
94 | |
95 | /* | |
96 | * Wrapper function for sys_fadvise64/fadvise64_64 | |
97 | */ | |
347a8dc3 | 98 | #ifndef CONFIG_64BIT |
1da177e4 | 99 | |
26689452 HC |
100 | SYSCALL_DEFINE5(s390_fadvise64, int, fd, u32, offset_high, u32, offset_low, |
101 | size_t, len, int, advice) | |
1da177e4 LT |
102 | { |
103 | return sys_fadvise64(fd, (u64) offset_high << 32 | offset_low, | |
104 | len, advice); | |
105 | } | |
106 | ||
1da177e4 LT |
107 | struct fadvise64_64_args { |
108 | int fd; | |
109 | long long offset; | |
110 | long long len; | |
111 | int advice; | |
112 | }; | |
113 | ||
26689452 | 114 | SYSCALL_DEFINE1(s390_fadvise64_64, struct fadvise64_64_args __user *, args) |
1da177e4 LT |
115 | { |
116 | struct fadvise64_64_args a; | |
117 | ||
118 | if ( copy_from_user(&a, args, sizeof(a)) ) | |
119 | return -EFAULT; | |
120 | return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice); | |
121 | } | |
7a8e0c8d | 122 | |
7a8e0c8d MS |
123 | /* |
124 | * This is a wrapper to call sys_fallocate(). For 31 bit s390 the last | |
125 | * 64 bit argument "len" is split into the upper and lower 32 bits. The | |
126 | * system call wrapper in the user space loads the value to %r6/%r7. | |
127 | * The code in entry.S keeps the values in %r2 - %r6 where they are and | |
128 | * stores %r7 to 96(%r15). But the standard C linkage requires that | |
129 | * the whole 64 bit value for len is stored on the stack and doesn't | |
130 | * use %r6 at all. So s390_fallocate has to convert the arguments from | |
131 | * %r2: fd, %r3: mode, %r4/%r5: offset, %r6/96(%r15)-99(%r15): len | |
132 | * to | |
133 | * %r2: fd, %r3: mode, %r4/%r5: offset, 96(%r15)-103(%r15): len | |
134 | */ | |
4a0fd5bf AV |
135 | SYSCALL_DEFINE5(s390_fallocate, int, fd, int, mode, loff_t, offset, |
136 | u32, len_high, u32, len_low) | |
7a8e0c8d MS |
137 | { |
138 | return sys_fallocate(fd, mode, offset, ((u64)len_high << 32) | len_low); | |
139 | } | |
140 | #endif |