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1da177e4 LT |
1 | /* sys_frv.c: FRV arch-specific syscall wrappers |
2 | * | |
3 | * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * - Derived from arch/m68k/kernel/sys_m68k.c | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/errno.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/mm.h> | |
4e950f6f | 16 | #include <linux/fs.h> |
1da177e4 | 17 | #include <linux/smp.h> |
1da177e4 LT |
18 | #include <linux/sem.h> |
19 | #include <linux/msg.h> | |
20 | #include <linux/shm.h> | |
21 | #include <linux/stat.h> | |
22 | #include <linux/mman.h> | |
23 | #include <linux/file.h> | |
24 | #include <linux/utsname.h> | |
25 | #include <linux/syscalls.h> | |
26 | ||
27 | #include <asm/setup.h> | |
28 | #include <asm/uaccess.h> | |
29 | #include <asm/ipc.h> | |
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 | */ | |
53470aaa | 35 | asmlinkage long sys_pipe(unsigned long __user * fildes) |
1da177e4 LT |
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 | asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, | |
49 | unsigned long prot, unsigned long flags, | |
50 | unsigned long fd, unsigned long pgoff) | |
51 | { | |
52 | int error = -EBADF; | |
53 | struct file * file = NULL; | |
54 | ||
55 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
56 | if (!(flags & MAP_ANONYMOUS)) { | |
57 | file = fget(fd); | |
58 | if (!file) | |
59 | goto out; | |
60 | } | |
61 | ||
62 | /* As with sparc32, make sure the shift for mmap2 is constant | |
63 | (12), no matter what PAGE_SIZE we have.... */ | |
64 | ||
65 | /* But unlike sparc32, don't just silently break if we're | |
66 | trying to map something we can't */ | |
67 | if (pgoff & ((1<<(PAGE_SHIFT-12))-1)) | |
68 | return -EINVAL; | |
69 | ||
70 | pgoff >>= (PAGE_SHIFT - 12); | |
71 | ||
72 | down_write(¤t->mm->mmap_sem); | |
73 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
74 | up_write(¤t->mm->mmap_sem); | |
75 | ||
76 | if (file) | |
77 | fput(file); | |
78 | out: | |
79 | return error; | |
80 | } | |
81 | ||
82 | #if 0 /* DAVIDM - do we want this */ | |
83 | struct mmap_arg_struct64 { | |
84 | __u32 addr; | |
85 | __u32 len; | |
86 | __u32 prot; | |
87 | __u32 flags; | |
88 | __u64 offset; /* 64 bits */ | |
89 | __u32 fd; | |
90 | }; | |
91 | ||
92 | asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg) | |
93 | { | |
94 | int error = -EFAULT; | |
95 | struct file * file = NULL; | |
96 | struct mmap_arg_struct64 a; | |
97 | unsigned long pgoff; | |
98 | ||
99 | if (copy_from_user(&a, arg, sizeof(a))) | |
100 | return -EFAULT; | |
101 | ||
102 | if ((long)a.offset & ~PAGE_MASK) | |
103 | return -EINVAL; | |
104 | ||
105 | pgoff = a.offset >> PAGE_SHIFT; | |
106 | if ((a.offset >> PAGE_SHIFT) != pgoff) | |
107 | return -EINVAL; | |
108 | ||
109 | if (!(a.flags & MAP_ANONYMOUS)) { | |
110 | error = -EBADF; | |
111 | file = fget(a.fd); | |
112 | if (!file) | |
113 | goto out; | |
114 | } | |
115 | a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
116 | ||
117 | down_write(¤t->mm->mmap_sem); | |
118 | error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff); | |
119 | up_write(¤t->mm->mmap_sem); | |
120 | if (file) | |
121 | fput(file); | |
122 | out: | |
123 | return error; | |
124 | } | |
125 | #endif | |
126 | ||
127 | /* | |
128 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
129 | * | |
130 | * This is really horribly ugly. | |
131 | */ | |
132 | asmlinkage long sys_ipc(unsigned long call, | |
133 | unsigned long first, | |
134 | unsigned long second, | |
135 | unsigned long third, | |
136 | void __user *ptr, | |
137 | unsigned long fifth) | |
138 | { | |
139 | int version, ret; | |
140 | ||
141 | version = call >> 16; /* hack for backward compatibility */ | |
142 | call &= 0xffff; | |
143 | ||
144 | switch (call) { | |
145 | case SEMOP: | |
146 | return sys_semtimedop(first, (struct sembuf __user *)ptr, second, NULL); | |
147 | case SEMTIMEDOP: | |
148 | return sys_semtimedop(first, (struct sembuf __user *)ptr, second, | |
149 | (const struct timespec __user *)fifth); | |
150 | ||
151 | case SEMGET: | |
152 | return sys_semget (first, second, third); | |
153 | case SEMCTL: { | |
154 | union semun fourth; | |
155 | if (!ptr) | |
156 | return -EINVAL; | |
157 | if (get_user(fourth.__pad, (void * __user *) ptr)) | |
158 | return -EFAULT; | |
159 | return sys_semctl (first, second, third, fourth); | |
160 | } | |
161 | ||
162 | case MSGSND: | |
163 | return sys_msgsnd (first, (struct msgbuf __user *) ptr, | |
164 | second, third); | |
165 | case MSGRCV: | |
166 | switch (version) { | |
167 | case 0: { | |
168 | struct ipc_kludge tmp; | |
169 | if (!ptr) | |
170 | return -EINVAL; | |
171 | ||
172 | if (copy_from_user(&tmp, | |
173 | (struct ipc_kludge __user *) ptr, | |
174 | sizeof (tmp))) | |
175 | return -EFAULT; | |
176 | return sys_msgrcv (first, tmp.msgp, second, | |
177 | tmp.msgtyp, third); | |
178 | } | |
179 | default: | |
180 | return sys_msgrcv (first, | |
181 | (struct msgbuf __user *) ptr, | |
182 | second, fifth, third); | |
183 | } | |
184 | case MSGGET: | |
185 | return sys_msgget ((key_t) first, second); | |
186 | case MSGCTL: | |
187 | return sys_msgctl (first, second, (struct msqid_ds __user *) ptr); | |
188 | ||
189 | case SHMAT: | |
190 | switch (version) { | |
191 | default: { | |
192 | ulong raddr; | |
193 | ret = do_shmat (first, (char __user *) ptr, second, &raddr); | |
194 | if (ret) | |
195 | return ret; | |
196 | return put_user (raddr, (ulong __user *) third); | |
197 | } | |
198 | case 1: /* iBCS2 emulator entry point */ | |
199 | if (!segment_eq(get_fs(), get_ds())) | |
200 | return -EINVAL; | |
201 | /* The "(ulong *) third" is valid _only_ because of the kernel segment thing */ | |
202 | return do_shmat (first, (char __user *) ptr, second, (ulong *) third); | |
203 | } | |
204 | case SHMDT: | |
205 | return sys_shmdt ((char __user *)ptr); | |
206 | case SHMGET: | |
207 | return sys_shmget (first, second, third); | |
208 | case SHMCTL: | |
209 | return sys_shmctl (first, second, | |
210 | (struct shmid_ds __user *) ptr); | |
211 | default: | |
212 | return -ENOSYS; | |
213 | } | |
214 | } |