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b920de1b DH |
1 | /* MN10300 Weird system calls |
2 | * | |
3 | * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd. | |
4 | * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public Licence | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the Licence, or (at your option) any later version. | |
10 | */ | |
11 | #include <linux/errno.h> | |
12 | #include <linux/sched.h> | |
13 | #include <linux/syscalls.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/smp.h> | |
16 | #include <linux/smp_lock.h> | |
17 | #include <linux/sem.h> | |
18 | #include <linux/msg.h> | |
19 | #include <linux/shm.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/mman.h> | |
22 | #include <linux/file.h> | |
23 | #include <linux/utsname.h> | |
24 | #include <linux/syscalls.h> | |
25 | #include <linux/tty.h> | |
26 | ||
27 | #include <asm/uaccess.h> | |
28 | ||
29 | #define MIN_MAP_ADDR PAGE_SIZE /* minimum fixed mmap address */ | |
30 | ||
31 | /* | |
32 | * sys_pipe() is the normal C calling standard for creating | |
33 | * a pipe. It's not the way Unix traditionally does this, though. | |
34 | */ | |
35 | asmlinkage long sys_pipe(unsigned long __user *fildes) | |
36 | { | |
37 | int fd[2]; | |
38 | int error; | |
39 | ||
40 | error = do_pipe(fd); | |
41 | if (!error) { | |
42 | if (copy_to_user(fildes, fd, 2 * sizeof(int))) | |
43 | error = -EFAULT; | |
44 | } | |
45 | return error; | |
46 | } | |
47 | ||
48 | /* | |
49 | * memory mapping syscall | |
50 | */ | |
51 | asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, | |
52 | unsigned long prot, unsigned long flags, | |
53 | unsigned long fd, unsigned long pgoff) | |
54 | { | |
55 | struct file *file = NULL; | |
56 | long error = -EINVAL; | |
57 | ||
58 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
59 | ||
60 | if (flags & MAP_FIXED && addr < MIN_MAP_ADDR) | |
61 | goto out; | |
62 | ||
63 | error = -EBADF; | |
64 | if (!(flags & MAP_ANONYMOUS)) { | |
65 | file = fget(fd); | |
66 | if (!file) | |
67 | goto out; | |
68 | } | |
69 | ||
70 | down_write(¤t->mm->mmap_sem); | |
71 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
72 | up_write(¤t->mm->mmap_sem); | |
73 | ||
74 | if (file) | |
75 | fput(file); | |
76 | out: | |
77 | return error; | |
78 | } | |
79 | ||
80 | asmlinkage long old_mmap(unsigned long addr, unsigned long len, | |
81 | unsigned long prot, unsigned long flags, | |
82 | unsigned long fd, unsigned long offset) | |
83 | { | |
84 | if (offset & ~PAGE_MASK) | |
85 | return -EINVAL; | |
86 | return sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); | |
87 | } | |
88 | ||
89 | struct sel_arg_struct { | |
90 | unsigned long n; | |
91 | fd_set *inp; | |
92 | fd_set *outp; | |
93 | fd_set *exp; | |
94 | struct timeval *tvp; | |
95 | }; | |
96 | ||
97 | asmlinkage int old_select(struct sel_arg_struct __user *arg) | |
98 | { | |
99 | struct sel_arg_struct a; | |
100 | ||
101 | if (copy_from_user(&a, arg, sizeof(a))) | |
102 | return -EFAULT; | |
103 | /* sys_select() does the appropriate kernel locking */ | |
104 | return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp); | |
105 | } | |
106 | ||
107 | /* | |
108 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
109 | * | |
110 | * This is really horribly ugly. | |
111 | */ | |
112 | asmlinkage long sys_ipc(uint call, int first, int second, | |
113 | int third, void __user *ptr, long fifth) | |
114 | { | |
115 | int version, ret; | |
116 | ||
117 | version = call >> 16; /* hack for backward compatibility */ | |
118 | call &= 0xffff; | |
119 | ||
120 | switch (call) { | |
121 | case SEMOP: | |
122 | return sys_semtimedop(first, (struct sembuf __user *)ptr, | |
123 | second, NULL); | |
124 | case SEMTIMEDOP: | |
125 | return sys_semtimedop(first, (struct sembuf __user *)ptr, | |
126 | second, | |
127 | (const struct timespec __user *)fifth); | |
128 | case SEMGET: | |
129 | return sys_semget(first, second, third); | |
130 | case SEMCTL: { | |
131 | union semun fourth; | |
132 | if (!ptr) | |
133 | return -EINVAL; | |
134 | if (get_user(fourth.__pad, (void __user * __user *) ptr)) | |
135 | return -EFAULT; | |
136 | return sys_semctl(first, second, third, fourth); | |
137 | } | |
138 | ||
139 | case MSGSND: | |
140 | return sys_msgsnd(first, (struct msgbuf __user *) ptr, | |
141 | second, third); | |
142 | case MSGRCV: | |
143 | switch (version) { | |
144 | case 0: { | |
145 | struct ipc_kludge tmp; | |
146 | if (!ptr) | |
147 | return -EINVAL; | |
148 | ||
149 | if (copy_from_user(&tmp, | |
150 | (struct ipc_kludge __user *) ptr, | |
151 | sizeof(tmp))) | |
152 | return -EFAULT; | |
153 | return sys_msgrcv(first, tmp.msgp, second, | |
154 | tmp.msgtyp, third); | |
155 | } | |
156 | default: | |
157 | return sys_msgrcv(first, | |
158 | (struct msgbuf __user *) ptr, | |
159 | second, fifth, third); | |
160 | } | |
161 | case MSGGET: | |
162 | return sys_msgget((key_t) first, second); | |
163 | case MSGCTL: | |
164 | return sys_msgctl(first, second, | |
165 | (struct msqid_ds __user *) ptr); | |
166 | ||
167 | case SHMAT: | |
168 | switch (version) { | |
169 | default: { | |
170 | ulong raddr; | |
171 | ret = do_shmat(first, (char __user *) ptr, second, | |
172 | &raddr); | |
173 | if (ret) | |
174 | return ret; | |
175 | return put_user(raddr, (ulong *) third); | |
176 | } | |
177 | case 1: /* iBCS2 emulator entry point */ | |
178 | if (!segment_eq(get_fs(), get_ds())) | |
179 | return -EINVAL; | |
180 | return do_shmat(first, (char __user *) ptr, second, | |
181 | (ulong *) third); | |
182 | } | |
183 | case SHMDT: | |
184 | return sys_shmdt((char __user *)ptr); | |
185 | case SHMGET: | |
186 | return sys_shmget(first, second, third); | |
187 | case SHMCTL: | |
188 | return sys_shmctl(first, second, | |
189 | (struct shmid_ds __user *) ptr); | |
190 | default: | |
191 | return -EINVAL; | |
192 | } | |
193 | } |