blob: 65f7a95f056e9726281521b792e5d12a9a9b6282 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#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>
20#include <linux/utsname.h>
Adrian Bunkcba4fbb2007-10-16 23:29:24 -070021#include <linux/ipc.h>
Greg Ungerer405d2962007-08-24 09:26:12 +100022#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
24#include <asm/setup.h>
25#include <asm/uaccess.h>
26#include <asm/cachectl.h>
27#include <asm/traps.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <asm/cacheflush.h>
Arnd Bergmannfe742902006-10-02 02:18:34 -070029#include <asm/unistd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030
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 */
35asmlinkage int sys_pipe(unsigned long * fildes)
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/* common code for old and new mmaps */
49static inline long do_mmap2(
50 unsigned long addr, unsigned long len,
51 unsigned long prot, unsigned long flags,
52 unsigned long fd, unsigned long pgoff)
53{
54 int error = -EBADF;
55 struct file * file = NULL;
56
57 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
58 if (!(flags & MAP_ANONYMOUS)) {
59 file = fget(fd);
60 if (!file)
61 goto out;
62 }
63
64 down_write(&current->mm->mmap_sem);
65 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
66 up_write(&current->mm->mmap_sem);
67
68 if (file)
69 fput(file);
70out:
71 return error;
72}
73
74asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
75 unsigned long prot, unsigned long flags,
76 unsigned long fd, unsigned long pgoff)
77{
78 return do_mmap2(addr, len, prot, flags, fd, pgoff);
79}
80
81/*
82 * Perform the select(nd, in, out, ex, tv) and mmap() system
83 * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
84 * handle more than 4 system call parameters, so these system calls
85 * used a memory block for parameter passing..
86 */
87
88struct mmap_arg_struct {
89 unsigned long addr;
90 unsigned long len;
91 unsigned long prot;
92 unsigned long flags;
93 unsigned long fd;
94 unsigned long offset;
95};
96
97asmlinkage int old_mmap(struct mmap_arg_struct *arg)
98{
99 struct mmap_arg_struct a;
100 int error = -EFAULT;
101
102 if (copy_from_user(&a, arg, sizeof(a)))
103 goto out;
104
105 error = -EINVAL;
106 if (a.offset & ~PAGE_MASK)
107 goto out;
108
109 a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
110
111 error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
112out:
113 return error;
114}
115
116struct sel_arg_struct {
117 unsigned long n;
118 fd_set *inp, *outp, *exp;
119 struct timeval *tvp;
120};
121
122asmlinkage int old_select(struct sel_arg_struct *arg)
123{
124 struct sel_arg_struct a;
125
126 if (copy_from_user(&a, arg, sizeof(a)))
127 return -EFAULT;
128 /* sys_select() does the appropriate kernel locking */
129 return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
130}
131
132/*
133 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
134 *
135 * This is really horribly ugly.
136 */
137asmlinkage int sys_ipc (uint call, int first, int second,
138 int third, void *ptr, long fifth)
139{
David Wu1bddcc52006-12-04 17:27:22 +1000140 int version, ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142 version = call >> 16; /* hack for backward compatibility */
143 call &= 0xffff;
144
145 if (call <= SEMCTL)
146 switch (call) {
147 case SEMOP:
148 return sys_semop (first, (struct sembuf *)ptr, second);
149 case SEMGET:
150 return sys_semget (first, second, third);
151 case SEMCTL: {
152 union semun fourth;
153 if (!ptr)
154 return -EINVAL;
155 if (get_user(fourth.__pad, (void **) ptr))
156 return -EFAULT;
157 return sys_semctl (first, second, third, fourth);
158 }
159 default:
160 return -EINVAL;
161 }
162 if (call <= MSGCTL)
163 switch (call) {
164 case MSGSND:
165 return sys_msgsnd (first, (struct msgbuf *) ptr,
166 second, third);
167 case MSGRCV:
168 switch (version) {
169 case 0: {
170 struct ipc_kludge tmp;
171 if (!ptr)
172 return -EINVAL;
173 if (copy_from_user (&tmp,
174 (struct ipc_kludge *)ptr,
175 sizeof (tmp)))
176 return -EFAULT;
177 return sys_msgrcv (first, tmp.msgp, second,
178 tmp.msgtyp, third);
179 }
180 default:
181 return sys_msgrcv (first,
182 (struct msgbuf *) ptr,
183 second, fifth, third);
184 }
185 case MSGGET:
186 return sys_msgget ((key_t) first, second);
187 case MSGCTL:
188 return sys_msgctl (first, second,
189 (struct msqid_ds *) ptr);
190 default:
191 return -EINVAL;
192 }
David Wu1bddcc52006-12-04 17:27:22 +1000193 if (call <= SHMCTL)
194 switch (call) {
195 case SHMAT:
196 switch (version) {
197 default: {
198 ulong raddr;
199 ret = do_shmat (first, ptr, second, &raddr);
200 if (ret)
201 return ret;
202 return put_user (raddr, (ulong __user *) third);
203 }
204 }
205 case SHMDT:
206 return sys_shmdt (ptr);
207 case SHMGET:
208 return sys_shmget (first, second, third);
209 case SHMCTL:
210 return sys_shmctl (first, second, ptr);
211 default:
212 return -ENOSYS;
213 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
215 return -EINVAL;
216}
217
218/* sys_cacheflush -- flush (part of) the processor cache. */
219asmlinkage int
220sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
221{
222 flush_cache_all();
223 return(0);
224}
225
226asmlinkage int sys_getpagesize(void)
227{
228 return PAGE_SIZE;
229}
230
Arnd Bergmannfe742902006-10-02 02:18:34 -0700231/*
232 * Do a system call from kernel instead of calling sys_execve so we
233 * end up with proper pt_regs.
234 */
235int kernel_execve(const char *filename, char *const argv[], char *const envp[])
236{
237 register long __res asm ("%d0") = __NR_execve;
238 register long __a asm ("%d1") = (long)(filename);
239 register long __b asm ("%d2") = (long)(argv);
240 register long __c asm ("%d3") = (long)(envp);
241 asm volatile ("trap #0" : "+d" (__res)
242 : "d" (__a), "d" (__b), "d" (__c));
243 return __res;
244}