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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> | |
1da177e4 | 24 | #include <linux/syscalls.h> |
cba4fbbf | 25 | #include <linux/ipc.h> |
1da177e4 LT |
26 | |
27 | #include <asm/setup.h> | |
28 | #include <asm/uaccess.h> | |
1da177e4 | 29 | |
1da177e4 LT |
30 | asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, |
31 | unsigned long prot, unsigned long flags, | |
32 | unsigned long fd, unsigned long pgoff) | |
33 | { | |
34 | int error = -EBADF; | |
35 | struct file * file = NULL; | |
36 | ||
1da177e4 LT |
37 | /* As with sparc32, make sure the shift for mmap2 is constant |
38 | (12), no matter what PAGE_SIZE we have.... */ | |
39 | ||
40 | /* But unlike sparc32, don't just silently break if we're | |
41 | trying to map something we can't */ | |
4280e312 | 42 | if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1)) |
1da177e4 | 43 | return -EINVAL; |
4280e312 | 44 | pgoff >>= PAGE_SHIFT - 12; |
1da177e4 | 45 | |
4280e312 DH |
46 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); |
47 | if (!(flags & MAP_ANONYMOUS)) { | |
48 | file = fget(fd); | |
49 | if (!file) | |
50 | goto out; | |
51 | } | |
1da177e4 LT |
52 | |
53 | down_write(¤t->mm->mmap_sem); | |
54 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
55 | up_write(¤t->mm->mmap_sem); | |
56 | ||
57 | if (file) | |
58 | fput(file); | |
59 | out: | |
60 | return error; | |
61 | } | |
62 | ||
63 | #if 0 /* DAVIDM - do we want this */ | |
64 | struct mmap_arg_struct64 { | |
65 | __u32 addr; | |
66 | __u32 len; | |
67 | __u32 prot; | |
68 | __u32 flags; | |
69 | __u64 offset; /* 64 bits */ | |
70 | __u32 fd; | |
71 | }; | |
72 | ||
73 | asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg) | |
74 | { | |
75 | int error = -EFAULT; | |
76 | struct file * file = NULL; | |
77 | struct mmap_arg_struct64 a; | |
78 | unsigned long pgoff; | |
79 | ||
80 | if (copy_from_user(&a, arg, sizeof(a))) | |
81 | return -EFAULT; | |
82 | ||
83 | if ((long)a.offset & ~PAGE_MASK) | |
84 | return -EINVAL; | |
85 | ||
86 | pgoff = a.offset >> PAGE_SHIFT; | |
87 | if ((a.offset >> PAGE_SHIFT) != pgoff) | |
88 | return -EINVAL; | |
89 | ||
90 | if (!(a.flags & MAP_ANONYMOUS)) { | |
91 | error = -EBADF; | |
92 | file = fget(a.fd); | |
93 | if (!file) | |
94 | goto out; | |
95 | } | |
96 | a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
97 | ||
98 | down_write(¤t->mm->mmap_sem); | |
99 | error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff); | |
100 | up_write(¤t->mm->mmap_sem); | |
101 | if (file) | |
102 | fput(file); | |
103 | out: | |
104 | return error; | |
105 | } | |
106 | #endif | |
107 | ||
108 | /* | |
109 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
110 | * | |
111 | * This is really horribly ugly. | |
112 | */ | |
113 | asmlinkage long sys_ipc(unsigned long call, | |
114 | unsigned long first, | |
115 | unsigned long second, | |
116 | unsigned long third, | |
117 | void __user *ptr, | |
118 | unsigned long fifth) | |
119 | { | |
120 | int version, ret; | |
121 | ||
122 | version = call >> 16; /* hack for backward compatibility */ | |
123 | call &= 0xffff; | |
124 | ||
125 | switch (call) { | |
126 | case SEMOP: | |
127 | return sys_semtimedop(first, (struct sembuf __user *)ptr, second, NULL); | |
128 | case SEMTIMEDOP: | |
129 | return sys_semtimedop(first, (struct sembuf __user *)ptr, second, | |
130 | (const struct timespec __user *)fifth); | |
131 | ||
132 | case SEMGET: | |
133 | return sys_semget (first, second, third); | |
134 | case SEMCTL: { | |
135 | union semun fourth; | |
136 | if (!ptr) | |
137 | return -EINVAL; | |
138 | if (get_user(fourth.__pad, (void * __user *) ptr)) | |
139 | return -EFAULT; | |
140 | return sys_semctl (first, second, third, fourth); | |
141 | } | |
142 | ||
143 | case MSGSND: | |
144 | return sys_msgsnd (first, (struct msgbuf __user *) ptr, | |
145 | second, third); | |
146 | case MSGRCV: | |
147 | switch (version) { | |
148 | case 0: { | |
149 | struct ipc_kludge tmp; | |
150 | if (!ptr) | |
151 | return -EINVAL; | |
152 | ||
153 | if (copy_from_user(&tmp, | |
154 | (struct ipc_kludge __user *) ptr, | |
155 | sizeof (tmp))) | |
156 | return -EFAULT; | |
157 | return sys_msgrcv (first, tmp.msgp, second, | |
158 | tmp.msgtyp, third); | |
159 | } | |
160 | default: | |
161 | return sys_msgrcv (first, | |
162 | (struct msgbuf __user *) ptr, | |
163 | second, fifth, third); | |
164 | } | |
165 | case MSGGET: | |
166 | return sys_msgget ((key_t) first, second); | |
167 | case MSGCTL: | |
168 | return sys_msgctl (first, second, (struct msqid_ds __user *) ptr); | |
169 | ||
170 | case SHMAT: | |
171 | switch (version) { | |
172 | default: { | |
173 | ulong raddr; | |
174 | ret = do_shmat (first, (char __user *) ptr, second, &raddr); | |
175 | if (ret) | |
176 | return ret; | |
177 | return put_user (raddr, (ulong __user *) third); | |
178 | } | |
179 | case 1: /* iBCS2 emulator entry point */ | |
180 | if (!segment_eq(get_fs(), get_ds())) | |
181 | return -EINVAL; | |
182 | /* The "(ulong *) third" is valid _only_ because of the kernel segment thing */ | |
183 | return do_shmat (first, (char __user *) ptr, second, (ulong *) third); | |
184 | } | |
185 | case SHMDT: | |
186 | return sys_shmdt ((char __user *)ptr); | |
187 | case SHMGET: | |
188 | return sys_shmget (first, second, third); | |
189 | case SHMCTL: | |
190 | return sys_shmctl (first, second, | |
191 | (struct shmid_ds __user *) ptr); | |
192 | default: | |
193 | return -ENOSYS; | |
194 | } | |
195 | } |