Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/m68knommu/kernel/sys_m68k.c | |
3 | * | |
4 | * This file contains various random system calls that | |
5 | * have a non-standard calling sequence on the Linux/m68k | |
6 | * platform. | |
7 | */ | |
8 | ||
9 | #include <linux/errno.h> | |
10 | #include <linux/sched.h> | |
11 | #include <linux/mm.h> | |
12 | #include <linux/smp.h> | |
1da177e4 LT |
13 | #include <linux/sem.h> |
14 | #include <linux/msg.h> | |
15 | #include <linux/shm.h> | |
16 | #include <linux/stat.h> | |
17 | #include <linux/syscalls.h> | |
18 | #include <linux/mman.h> | |
19 | #include <linux/file.h> | |
cba4fbbf | 20 | #include <linux/ipc.h> |
405d2965 | 21 | #include <linux/fs.h> |
1da177e4 LT |
22 | |
23 | #include <asm/setup.h> | |
24 | #include <asm/uaccess.h> | |
25 | #include <asm/cachectl.h> | |
26 | #include <asm/traps.h> | |
1da177e4 | 27 | #include <asm/cacheflush.h> |
fe74290d | 28 | #include <asm/unistd.h> |
1da177e4 | 29 | |
1da177e4 LT |
30 | /* |
31 | * Perform the select(nd, in, out, ex, tv) and mmap() system | |
32 | * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to | |
33 | * handle more than 4 system call parameters, so these system calls | |
34 | * used a memory block for parameter passing.. | |
35 | */ | |
36 | ||
37 | struct mmap_arg_struct { | |
38 | unsigned long addr; | |
39 | unsigned long len; | |
40 | unsigned long prot; | |
41 | unsigned long flags; | |
42 | unsigned long fd; | |
43 | unsigned long offset; | |
44 | }; | |
45 | ||
46 | asmlinkage int old_mmap(struct mmap_arg_struct *arg) | |
47 | { | |
48 | struct mmap_arg_struct a; | |
49 | int error = -EFAULT; | |
50 | ||
51 | if (copy_from_user(&a, arg, sizeof(a))) | |
52 | goto out; | |
53 | ||
54 | error = -EINVAL; | |
55 | if (a.offset & ~PAGE_MASK) | |
56 | goto out; | |
57 | ||
f8b72560 AV |
58 | error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, |
59 | a.offset >> PAGE_SHIFT); | |
1da177e4 LT |
60 | out: |
61 | return error; | |
62 | } | |
63 | ||
64 | struct sel_arg_struct { | |
65 | unsigned long n; | |
66 | fd_set *inp, *outp, *exp; | |
67 | struct timeval *tvp; | |
68 | }; | |
69 | ||
70 | asmlinkage int old_select(struct sel_arg_struct *arg) | |
71 | { | |
72 | struct sel_arg_struct a; | |
73 | ||
74 | if (copy_from_user(&a, arg, sizeof(a))) | |
75 | return -EFAULT; | |
76 | /* sys_select() does the appropriate kernel locking */ | |
77 | return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp); | |
78 | } | |
79 | ||
80 | /* | |
81 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
82 | * | |
83 | * This is really horribly ugly. | |
84 | */ | |
85 | asmlinkage int sys_ipc (uint call, int first, int second, | |
86 | int third, void *ptr, long fifth) | |
87 | { | |
1bddcc50 | 88 | int version, ret; |
1da177e4 LT |
89 | |
90 | version = call >> 16; /* hack for backward compatibility */ | |
91 | call &= 0xffff; | |
92 | ||
93 | if (call <= SEMCTL) | |
94 | switch (call) { | |
95 | case SEMOP: | |
96 | return sys_semop (first, (struct sembuf *)ptr, second); | |
97 | case SEMGET: | |
98 | return sys_semget (first, second, third); | |
99 | case SEMCTL: { | |
100 | union semun fourth; | |
101 | if (!ptr) | |
102 | return -EINVAL; | |
103 | if (get_user(fourth.__pad, (void **) ptr)) | |
104 | return -EFAULT; | |
105 | return sys_semctl (first, second, third, fourth); | |
106 | } | |
107 | default: | |
108 | return -EINVAL; | |
109 | } | |
110 | if (call <= MSGCTL) | |
111 | switch (call) { | |
112 | case MSGSND: | |
113 | return sys_msgsnd (first, (struct msgbuf *) ptr, | |
114 | second, third); | |
115 | case MSGRCV: | |
116 | switch (version) { | |
117 | case 0: { | |
118 | struct ipc_kludge tmp; | |
119 | if (!ptr) | |
120 | return -EINVAL; | |
121 | if (copy_from_user (&tmp, | |
122 | (struct ipc_kludge *)ptr, | |
123 | sizeof (tmp))) | |
124 | return -EFAULT; | |
125 | return sys_msgrcv (first, tmp.msgp, second, | |
126 | tmp.msgtyp, third); | |
127 | } | |
128 | default: | |
129 | return sys_msgrcv (first, | |
130 | (struct msgbuf *) ptr, | |
131 | second, fifth, third); | |
132 | } | |
133 | case MSGGET: | |
134 | return sys_msgget ((key_t) first, second); | |
135 | case MSGCTL: | |
136 | return sys_msgctl (first, second, | |
137 | (struct msqid_ds *) ptr); | |
138 | default: | |
139 | return -EINVAL; | |
140 | } | |
1bddcc50 DW |
141 | if (call <= SHMCTL) |
142 | switch (call) { | |
143 | case SHMAT: | |
144 | switch (version) { | |
145 | default: { | |
146 | ulong raddr; | |
147 | ret = do_shmat (first, ptr, second, &raddr); | |
148 | if (ret) | |
149 | return ret; | |
150 | return put_user (raddr, (ulong __user *) third); | |
151 | } | |
152 | } | |
153 | case SHMDT: | |
154 | return sys_shmdt (ptr); | |
155 | case SHMGET: | |
156 | return sys_shmget (first, second, third); | |
157 | case SHMCTL: | |
158 | return sys_shmctl (first, second, ptr); | |
159 | default: | |
160 | return -ENOSYS; | |
161 | } | |
1da177e4 LT |
162 | |
163 | return -EINVAL; | |
164 | } | |
165 | ||
166 | /* sys_cacheflush -- flush (part of) the processor cache. */ | |
167 | asmlinkage int | |
168 | sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) | |
169 | { | |
170 | flush_cache_all(); | |
171 | return(0); | |
172 | } | |
173 | ||
174 | asmlinkage int sys_getpagesize(void) | |
175 | { | |
176 | return PAGE_SIZE; | |
177 | } | |
178 | ||
fe74290d AB |
179 | /* |
180 | * Do a system call from kernel instead of calling sys_execve so we | |
181 | * end up with proper pt_regs. | |
182 | */ | |
183 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) | |
184 | { | |
185 | register long __res asm ("%d0") = __NR_execve; | |
186 | register long __a asm ("%d1") = (long)(filename); | |
187 | register long __b asm ("%d2") = (long)(argv); | |
188 | register long __c asm ("%d3") = (long)(envp); | |
189 | asm volatile ("trap #0" : "+d" (__res) | |
190 | : "d" (__a), "d" (__b), "d" (__c)); | |
191 | return __res; | |
192 | } |