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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> | |
cba4fbbf | 26 | #include <linux/ipc.h> |
1da177e4 LT |
27 | |
28 | #include <asm/setup.h> | |
29 | #include <asm/uaccess.h> | |
1da177e4 | 30 | |
1da177e4 LT |
31 | asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, |
32 | unsigned long prot, unsigned long flags, | |
33 | unsigned long fd, unsigned long pgoff) | |
34 | { | |
35 | int error = -EBADF; | |
36 | struct file * file = NULL; | |
37 | ||
38 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
39 | if (!(flags & MAP_ANONYMOUS)) { | |
40 | file = fget(fd); | |
41 | if (!file) | |
42 | goto out; | |
43 | } | |
44 | ||
45 | /* As with sparc32, make sure the shift for mmap2 is constant | |
46 | (12), no matter what PAGE_SIZE we have.... */ | |
47 | ||
48 | /* But unlike sparc32, don't just silently break if we're | |
49 | trying to map something we can't */ | |
50 | if (pgoff & ((1<<(PAGE_SHIFT-12))-1)) | |
51 | return -EINVAL; | |
52 | ||
53 | pgoff >>= (PAGE_SHIFT - 12); | |
54 | ||
55 | down_write(¤t->mm->mmap_sem); | |
56 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
57 | up_write(¤t->mm->mmap_sem); | |
58 | ||
59 | if (file) | |
60 | fput(file); | |
61 | out: | |
62 | return error; | |
63 | } | |
64 | ||
65 | #if 0 /* DAVIDM - do we want this */ | |
66 | struct mmap_arg_struct64 { | |
67 | __u32 addr; | |
68 | __u32 len; | |
69 | __u32 prot; | |
70 | __u32 flags; | |
71 | __u64 offset; /* 64 bits */ | |
72 | __u32 fd; | |
73 | }; | |
74 | ||
75 | asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg) | |
76 | { | |
77 | int error = -EFAULT; | |
78 | struct file * file = NULL; | |
79 | struct mmap_arg_struct64 a; | |
80 | unsigned long pgoff; | |
81 | ||
82 | if (copy_from_user(&a, arg, sizeof(a))) | |
83 | return -EFAULT; | |
84 | ||
85 | if ((long)a.offset & ~PAGE_MASK) | |
86 | return -EINVAL; | |
87 | ||
88 | pgoff = a.offset >> PAGE_SHIFT; | |
89 | if ((a.offset >> PAGE_SHIFT) != pgoff) | |
90 | return -EINVAL; | |
91 | ||
92 | if (!(a.flags & MAP_ANONYMOUS)) { | |
93 | error = -EBADF; | |
94 | file = fget(a.fd); | |
95 | if (!file) | |
96 | goto out; | |
97 | } | |
98 | a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
99 | ||
100 | down_write(¤t->mm->mmap_sem); | |
101 | error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff); | |
102 | up_write(¤t->mm->mmap_sem); | |
103 | if (file) | |
104 | fput(file); | |
105 | out: | |
106 | return error; | |
107 | } | |
108 | #endif | |
109 | ||
110 | /* | |
111 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
112 | * | |
113 | * This is really horribly ugly. | |
114 | */ | |
115 | asmlinkage long sys_ipc(unsigned long call, | |
116 | unsigned long first, | |
117 | unsigned long second, | |
118 | unsigned long third, | |
119 | void __user *ptr, | |
120 | unsigned long fifth) | |
121 | { | |
122 | int version, ret; | |
123 | ||
124 | version = call >> 16; /* hack for backward compatibility */ | |
125 | call &= 0xffff; | |
126 | ||
127 | switch (call) { | |
128 | case SEMOP: | |
129 | return sys_semtimedop(first, (struct sembuf __user *)ptr, second, NULL); | |
130 | case SEMTIMEDOP: | |
131 | return sys_semtimedop(first, (struct sembuf __user *)ptr, second, | |
132 | (const struct timespec __user *)fifth); | |
133 | ||
134 | case SEMGET: | |
135 | return sys_semget (first, second, third); | |
136 | case SEMCTL: { | |
137 | union semun fourth; | |
138 | if (!ptr) | |
139 | return -EINVAL; | |
140 | if (get_user(fourth.__pad, (void * __user *) ptr)) | |
141 | return -EFAULT; | |
142 | return sys_semctl (first, second, third, fourth); | |
143 | } | |
144 | ||
145 | case MSGSND: | |
146 | return sys_msgsnd (first, (struct msgbuf __user *) ptr, | |
147 | second, third); | |
148 | case MSGRCV: | |
149 | switch (version) { | |
150 | case 0: { | |
151 | struct ipc_kludge tmp; | |
152 | if (!ptr) | |
153 | return -EINVAL; | |
154 | ||
155 | if (copy_from_user(&tmp, | |
156 | (struct ipc_kludge __user *) ptr, | |
157 | sizeof (tmp))) | |
158 | return -EFAULT; | |
159 | return sys_msgrcv (first, tmp.msgp, second, | |
160 | tmp.msgtyp, third); | |
161 | } | |
162 | default: | |
163 | return sys_msgrcv (first, | |
164 | (struct msgbuf __user *) ptr, | |
165 | second, fifth, third); | |
166 | } | |
167 | case MSGGET: | |
168 | return sys_msgget ((key_t) first, second); | |
169 | case MSGCTL: | |
170 | return sys_msgctl (first, second, (struct msqid_ds __user *) ptr); | |
171 | ||
172 | case SHMAT: | |
173 | switch (version) { | |
174 | default: { | |
175 | ulong raddr; | |
176 | ret = do_shmat (first, (char __user *) ptr, second, &raddr); | |
177 | if (ret) | |
178 | return ret; | |
179 | return put_user (raddr, (ulong __user *) third); | |
180 | } | |
181 | case 1: /* iBCS2 emulator entry point */ | |
182 | if (!segment_eq(get_fs(), get_ds())) | |
183 | return -EINVAL; | |
184 | /* The "(ulong *) third" is valid _only_ because of the kernel segment thing */ | |
185 | return do_shmat (first, (char __user *) ptr, second, (ulong *) third); | |
186 | } | |
187 | case SHMDT: | |
188 | return sys_shmdt ((char __user *)ptr); | |
189 | case SHMGET: | |
190 | return sys_shmget (first, second, third); | |
191 | case SHMCTL: | |
192 | return sys_shmctl (first, second, | |
193 | (struct shmid_ds __user *) ptr); | |
194 | default: | |
195 | return -ENOSYS; | |
196 | } | |
197 | } |