diff options
Diffstat (limited to 'arch/v850/kernel/syscalls.c')
-rw-r--r-- | arch/v850/kernel/syscalls.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/arch/v850/kernel/syscalls.c b/arch/v850/kernel/syscalls.c new file mode 100644 index 000000000000..9224cb65f6ec --- /dev/null +++ b/arch/v850/kernel/syscalls.c | |||
@@ -0,0 +1,197 @@ | |||
1 | /* | ||
2 | * arch/v850/kernel/syscalls.c -- Various system-call definitions not | ||
3 | * defined in machine-independent code | ||
4 | * | ||
5 | * Copyright (C) 2001,02 NEC Corporation | ||
6 | * Copyright (C) 2001,02 Miles Bader <miles@gnu.org> | ||
7 | * | ||
8 | * This file is subject to the terms and conditions of the GNU General | ||
9 | * Public License. See the file COPYING in the main directory of this | ||
10 | * archive for more details. | ||
11 | * | ||
12 | * This file was derived the ppc version, arch/ppc/kernel/syscalls.c | ||
13 | * ... which was derived from "arch/i386/kernel/sys_i386.c" by Gary Thomas; | ||
14 | * modified by Cort Dougan (cort@cs.nmt.edu) | ||
15 | * and Paul Mackerras (paulus@cs.anu.edu.au). | ||
16 | */ | ||
17 | |||
18 | #include <linux/config.h> | ||
19 | #include <linux/errno.h> | ||
20 | #include <linux/mm.h> | ||
21 | #include <linux/smp.h> | ||
22 | #include <linux/smp_lock.h> | ||
23 | #include <linux/syscalls.h> | ||
24 | #include <linux/sem.h> | ||
25 | #include <linux/msg.h> | ||
26 | #include <linux/shm.h> | ||
27 | #include <linux/stat.h> | ||
28 | #include <linux/mman.h> | ||
29 | #include <linux/sys.h> | ||
30 | #include <linux/ipc.h> | ||
31 | #include <linux/utsname.h> | ||
32 | #include <linux/file.h> | ||
33 | |||
34 | #include <asm/uaccess.h> | ||
35 | #include <asm/ipc.h> | ||
36 | #include <asm/semaphore.h> | ||
37 | |||
38 | /* | ||
39 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | ||
40 | * | ||
41 | * This is really horribly ugly. | ||
42 | */ | ||
43 | int | ||
44 | sys_ipc (uint call, int first, int second, int third, void *ptr, long fifth) | ||
45 | { | ||
46 | int version, ret; | ||
47 | |||
48 | version = call >> 16; /* hack for backward compatibility */ | ||
49 | call &= 0xffff; | ||
50 | |||
51 | ret = -EINVAL; | ||
52 | switch (call) { | ||
53 | case SEMOP: | ||
54 | ret = sys_semop (first, (struct sembuf *)ptr, second); | ||
55 | break; | ||
56 | case SEMGET: | ||
57 | ret = sys_semget (first, second, third); | ||
58 | break; | ||
59 | case SEMCTL: | ||
60 | { | ||
61 | union semun fourth; | ||
62 | |||
63 | if (!ptr) | ||
64 | break; | ||
65 | if ((ret = access_ok(VERIFY_READ, ptr, sizeof(long)) ? 0 : -EFAULT) | ||
66 | || (ret = get_user(fourth.__pad, (void **)ptr))) | ||
67 | break; | ||
68 | ret = sys_semctl (first, second, third, fourth); | ||
69 | break; | ||
70 | } | ||
71 | case MSGSND: | ||
72 | ret = sys_msgsnd (first, (struct msgbuf *) ptr, second, third); | ||
73 | break; | ||
74 | case MSGRCV: | ||
75 | switch (version) { | ||
76 | case 0: { | ||
77 | struct ipc_kludge tmp; | ||
78 | |||
79 | if (!ptr) | ||
80 | break; | ||
81 | if ((ret = access_ok(VERIFY_READ, ptr, sizeof(tmp)) ? 0 : -EFAULT) | ||
82 | || (ret = copy_from_user(&tmp, | ||
83 | (struct ipc_kludge *) ptr, | ||
84 | sizeof (tmp)))) | ||
85 | break; | ||
86 | ret = sys_msgrcv (first, tmp.msgp, second, tmp.msgtyp, | ||
87 | third); | ||
88 | break; | ||
89 | } | ||
90 | default: | ||
91 | ret = sys_msgrcv (first, (struct msgbuf *) ptr, | ||
92 | second, fifth, third); | ||
93 | break; | ||
94 | } | ||
95 | break; | ||
96 | case MSGGET: | ||
97 | ret = sys_msgget ((key_t) first, second); | ||
98 | break; | ||
99 | case MSGCTL: | ||
100 | ret = sys_msgctl (first, second, (struct msqid_ds *) ptr); | ||
101 | break; | ||
102 | case SHMAT: | ||
103 | switch (version) { | ||
104 | default: { | ||
105 | ulong raddr; | ||
106 | |||
107 | if ((ret = access_ok(VERIFY_WRITE, (ulong*) third, | ||
108 | sizeof(ulong)) ? 0 : -EFAULT)) | ||
109 | break; | ||
110 | ret = do_shmat (first, (char *) ptr, second, &raddr); | ||
111 | if (ret) | ||
112 | break; | ||
113 | ret = put_user (raddr, (ulong *) third); | ||
114 | break; | ||
115 | } | ||
116 | case 1: /* iBCS2 emulator entry point */ | ||
117 | if (!segment_eq(get_fs(), get_ds())) | ||
118 | break; | ||
119 | ret = do_shmat (first, (char *) ptr, second, | ||
120 | (ulong *) third); | ||
121 | break; | ||
122 | } | ||
123 | break; | ||
124 | case SHMDT: | ||
125 | ret = sys_shmdt ((char *)ptr); | ||
126 | break; | ||
127 | case SHMGET: | ||
128 | ret = sys_shmget (first, second, third); | ||
129 | break; | ||
130 | case SHMCTL: | ||
131 | ret = sys_shmctl (first, second, (struct shmid_ds *) ptr); | ||
132 | break; | ||
133 | } | ||
134 | |||
135 | return ret; | ||
136 | } | ||
137 | |||
138 | /* | ||
139 | * sys_pipe() is the normal C calling standard for creating | ||
140 | * a pipe. It's not the way unix traditionally does this, though. | ||
141 | */ | ||
142 | int sys_pipe (int *fildes) | ||
143 | { | ||
144 | int fd[2]; | ||
145 | int error; | ||
146 | |||
147 | error = do_pipe (fd); | ||
148 | if (!error) { | ||
149 | if (copy_to_user (fildes, fd, 2*sizeof (int))) | ||
150 | error = -EFAULT; | ||
151 | } | ||
152 | return error; | ||
153 | } | ||
154 | |||
155 | static inline unsigned long | ||
156 | do_mmap2 (unsigned long addr, size_t len, | ||
157 | unsigned long prot, unsigned long flags, | ||
158 | unsigned long fd, unsigned long pgoff) | ||
159 | { | ||
160 | struct file * file = NULL; | ||
161 | int ret = -EBADF; | ||
162 | |||
163 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | ||
164 | if (! (flags & MAP_ANONYMOUS)) { | ||
165 | if (!(file = fget (fd))) | ||
166 | goto out; | ||
167 | } | ||
168 | |||
169 | down_write (¤t->mm->mmap_sem); | ||
170 | ret = do_mmap_pgoff (file, addr, len, prot, flags, pgoff); | ||
171 | up_write (¤t->mm->mmap_sem); | ||
172 | if (file) | ||
173 | fput (file); | ||
174 | out: | ||
175 | return ret; | ||
176 | } | ||
177 | |||
178 | unsigned long sys_mmap2 (unsigned long addr, size_t len, | ||
179 | unsigned long prot, unsigned long flags, | ||
180 | unsigned long fd, unsigned long pgoff) | ||
181 | { | ||
182 | return do_mmap2 (addr, len, prot, flags, fd, pgoff); | ||
183 | } | ||
184 | |||
185 | unsigned long sys_mmap (unsigned long addr, size_t len, | ||
186 | unsigned long prot, unsigned long flags, | ||
187 | unsigned long fd, off_t offset) | ||
188 | { | ||
189 | int err = -EINVAL; | ||
190 | |||
191 | if (offset & ~PAGE_MASK) | ||
192 | goto out; | ||
193 | |||
194 | err = do_mmap2 (addr, len, prot, flags, fd, offset >> PAGE_SHIFT); | ||
195 | out: | ||
196 | return err; | ||
197 | } | ||