Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/h8300/kernel/sys_h8300.c | |
3 | * | |
4 | * This file contains various random system calls that | |
5 | * have a non-standard calling sequence on the H8/300 | |
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> | |
0cd82ef1 | 20 | #include <linux/fs.h> |
cba4fbbf | 21 | #include <linux/ipc.h> |
1da177e4 LT |
22 | |
23 | #include <asm/setup.h> | |
24 | #include <asm/uaccess.h> | |
25 | #include <asm/cachectl.h> | |
26 | #include <asm/traps.h> | |
fe74290d | 27 | #include <asm/unistd.h> |
1da177e4 | 28 | |
1da177e4 LT |
29 | /* common code for old and new mmaps */ |
30 | static inline long do_mmap2( | |
31 | 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 | down_write(¤t->mm->mmap_sem); | |
46 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
47 | up_write(¤t->mm->mmap_sem); | |
48 | ||
49 | if (file) | |
50 | fput(file); | |
51 | out: | |
52 | return error; | |
53 | } | |
54 | ||
55 | asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, | |
56 | unsigned long prot, unsigned long flags, | |
57 | unsigned long fd, unsigned long pgoff) | |
58 | { | |
59 | return do_mmap2(addr, len, prot, flags, fd, pgoff); | |
60 | } | |
61 | ||
62 | /* | |
63 | * Perform the select(nd, in, out, ex, tv) and mmap() system | |
64 | * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to | |
65 | * handle more than 4 system call parameters, so these system calls | |
66 | * used a memory block for parameter passing.. | |
67 | */ | |
68 | ||
69 | struct mmap_arg_struct { | |
70 | unsigned long addr; | |
71 | unsigned long len; | |
72 | unsigned long prot; | |
73 | unsigned long flags; | |
74 | unsigned long fd; | |
75 | unsigned long offset; | |
76 | }; | |
77 | ||
78 | asmlinkage int old_mmap(struct mmap_arg_struct *arg) | |
79 | { | |
80 | struct mmap_arg_struct a; | |
81 | int error = -EFAULT; | |
82 | ||
83 | if (copy_from_user(&a, arg, sizeof(a))) | |
84 | goto out; | |
85 | ||
86 | error = -EINVAL; | |
87 | if (a.offset & ~PAGE_MASK) | |
88 | goto out; | |
89 | ||
90 | a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
91 | ||
92 | error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT); | |
93 | out: | |
94 | return error; | |
95 | } | |
96 | ||
97 | #if 0 /* DAVIDM - do we want this */ | |
98 | struct mmap_arg_struct64 { | |
99 | __u32 addr; | |
100 | __u32 len; | |
101 | __u32 prot; | |
102 | __u32 flags; | |
103 | __u64 offset; /* 64 bits */ | |
104 | __u32 fd; | |
105 | }; | |
106 | ||
107 | asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg) | |
108 | { | |
109 | int error = -EFAULT; | |
110 | struct file * file = NULL; | |
111 | struct mmap_arg_struct64 a; | |
112 | unsigned long pgoff; | |
113 | ||
114 | if (copy_from_user(&a, arg, sizeof(a))) | |
115 | return -EFAULT; | |
116 | ||
117 | if ((long)a.offset & ~PAGE_MASK) | |
118 | return -EINVAL; | |
119 | ||
120 | pgoff = a.offset >> PAGE_SHIFT; | |
121 | if ((a.offset >> PAGE_SHIFT) != pgoff) | |
122 | return -EINVAL; | |
123 | ||
124 | if (!(a.flags & MAP_ANONYMOUS)) { | |
125 | error = -EBADF; | |
126 | file = fget(a.fd); | |
127 | if (!file) | |
128 | goto out; | |
129 | } | |
130 | a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
131 | ||
132 | down_write(¤t->mm->mmap_sem); | |
133 | error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff); | |
134 | up_write(¤t->mm->mmap_sem); | |
135 | if (file) | |
136 | fput(file); | |
137 | out: | |
138 | return error; | |
139 | } | |
140 | #endif | |
141 | ||
142 | struct sel_arg_struct { | |
143 | unsigned long n; | |
144 | fd_set *inp, *outp, *exp; | |
145 | struct timeval *tvp; | |
146 | }; | |
147 | ||
148 | asmlinkage int old_select(struct sel_arg_struct *arg) | |
149 | { | |
150 | struct sel_arg_struct a; | |
151 | ||
152 | if (copy_from_user(&a, arg, sizeof(a))) | |
153 | return -EFAULT; | |
154 | /* sys_select() does the appropriate kernel locking */ | |
155 | return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp); | |
156 | } | |
157 | ||
158 | /* | |
159 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
160 | * | |
161 | * This is really horribly ugly. | |
162 | */ | |
163 | asmlinkage int sys_ipc (uint call, int first, int second, | |
164 | int third, void *ptr, long fifth) | |
165 | { | |
166 | int version, ret; | |
167 | ||
168 | version = call >> 16; /* hack for backward compatibility */ | |
169 | call &= 0xffff; | |
170 | ||
171 | if (call <= SEMCTL) | |
172 | switch (call) { | |
173 | case SEMOP: | |
174 | return sys_semop (first, (struct sembuf *)ptr, second); | |
175 | case SEMGET: | |
176 | return sys_semget (first, second, third); | |
177 | case SEMCTL: { | |
178 | union semun fourth; | |
179 | if (!ptr) | |
180 | return -EINVAL; | |
181 | if (get_user(fourth.__pad, (void **) ptr)) | |
182 | return -EFAULT; | |
183 | return sys_semctl (first, second, third, fourth); | |
184 | } | |
185 | default: | |
186 | return -EINVAL; | |
187 | } | |
188 | if (call <= MSGCTL) | |
189 | switch (call) { | |
190 | case MSGSND: | |
191 | return sys_msgsnd (first, (struct msgbuf *) ptr, | |
192 | second, third); | |
193 | case MSGRCV: | |
194 | switch (version) { | |
195 | case 0: { | |
196 | struct ipc_kludge tmp; | |
197 | if (!ptr) | |
198 | return -EINVAL; | |
199 | if (copy_from_user (&tmp, | |
200 | (struct ipc_kludge *)ptr, | |
201 | sizeof (tmp))) | |
202 | return -EFAULT; | |
203 | return sys_msgrcv (first, tmp.msgp, second, | |
204 | tmp.msgtyp, third); | |
205 | } | |
206 | default: | |
207 | return sys_msgrcv (first, | |
208 | (struct msgbuf *) ptr, | |
209 | second, fifth, third); | |
210 | } | |
211 | case MSGGET: | |
212 | return sys_msgget ((key_t) first, second); | |
213 | case MSGCTL: | |
214 | return sys_msgctl (first, second, | |
215 | (struct msqid_ds *) ptr); | |
216 | default: | |
217 | return -EINVAL; | |
218 | } | |
219 | if (call <= SHMCTL) | |
220 | switch (call) { | |
221 | case SHMAT: | |
222 | switch (version) { | |
223 | default: { | |
224 | ulong raddr; | |
225 | ret = do_shmat (first, (char *) ptr, | |
226 | second, &raddr); | |
227 | if (ret) | |
228 | return ret; | |
229 | return put_user (raddr, (ulong *) third); | |
230 | } | |
231 | } | |
232 | case SHMDT: | |
233 | return sys_shmdt ((char *)ptr); | |
234 | case SHMGET: | |
235 | return sys_shmget (first, second, third); | |
236 | case SHMCTL: | |
237 | return sys_shmctl (first, second, | |
238 | (struct shmid_ds *) ptr); | |
239 | default: | |
240 | return -EINVAL; | |
241 | } | |
242 | ||
243 | return -EINVAL; | |
244 | } | |
245 | ||
246 | /* sys_cacheflush -- no support. */ | |
247 | asmlinkage int | |
248 | sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len) | |
249 | { | |
250 | return -EINVAL; | |
251 | } | |
252 | ||
253 | asmlinkage int sys_getpagesize(void) | |
254 | { | |
255 | return PAGE_SIZE; | |
256 | } | |
257 | ||
258 | #if defined(CONFIG_SYSCALL_PRINT) | |
259 | asmlinkage void syscall_print(void *dummy,...) | |
260 | { | |
261 | struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4); | |
262 | printk("call %06lx:%ld 1:%08lx,2:%08lx,3:%08lx,ret:%08lx\n", | |
263 | ((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0); | |
264 | } | |
265 | #endif | |
fe74290d AB |
266 | |
267 | /* | |
268 | * Do a system call from kernel instead of calling sys_execve so we | |
269 | * end up with proper pt_regs. | |
270 | */ | |
271 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) | |
272 | { | |
273 | register long res __asm__("er0"); | |
8778beb9 YS |
274 | register char *const *_c __asm__("er3") = envp; |
275 | register char *const *_b __asm__("er2") = argv; | |
fe74290d | 276 | register const char * _a __asm__("er1") = filename; |
fe74290d AB |
277 | __asm__ __volatile__ ("mov.l %1,er0\n\t" |
278 | "trapa #0\n\t" | |
279 | : "=r" (res) | |
280 | : "g" (__NR_execve), | |
281 | "g" (_a), | |
282 | "g" (_b), | |
283 | "g" (_c) | |
284 | : "cc", "memory"); | |
285 | return res; | |
286 | } | |
287 | ||
288 |