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-rw-r--r--arch/mn10300/kernel/sys_mn10300.c193
1 files changed, 193 insertions, 0 deletions
diff --git a/arch/mn10300/kernel/sys_mn10300.c b/arch/mn10300/kernel/sys_mn10300.c
new file mode 100644
index 000000000000..5f17a1ebc825
--- /dev/null
+++ b/arch/mn10300/kernel/sys_mn10300.c
@@ -0,0 +1,193 @@
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 */
35asmlinkage 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 */
51asmlinkage 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(&current->mm->mmap_sem);
71 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
72 up_write(&current->mm->mmap_sem);
73
74 if (file)
75 fput(file);
76out:
77 return error;
78}
79
80asmlinkage 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
89struct 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
97asmlinkage 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 */
112asmlinkage 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}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-27 19:32:59 -0500