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1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 1995, 1996, 1997, 2000, 2001, 05 by Ralf Baechle | |
7 | * Copyright (C) 1999, 2000 Silicon Graphics, Inc. | |
8 | * Copyright (C) 2001 MIPS Technologies, Inc. | |
9 | */ | |
10 | #include <linux/a.out.h> | |
11 | #include <linux/errno.h> | |
12 | #include <linux/linkage.h> | |
13 | #include <linux/mm.h> | |
14 | #include <linux/smp.h> | |
15 | #include <linux/smp_lock.h> | |
16 | #include <linux/mman.h> | |
17 | #include <linux/ptrace.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/syscalls.h> | |
21 | #include <linux/file.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/utsname.h> | |
24 | #include <linux/unistd.h> | |
25 | #include <linux/sem.h> | |
26 | #include <linux/msg.h> | |
27 | #include <linux/shm.h> | |
28 | #include <linux/compiler.h> | |
29 | ||
30 | #include <asm/branch.h> | |
31 | #include <asm/cachectl.h> | |
32 | #include <asm/cacheflush.h> | |
33 | #include <asm/ipc.h> | |
048eb582 | 34 | #include <asm/asm-offsets.h> |
1da177e4 LT |
35 | #include <asm/signal.h> |
36 | #include <asm/sim.h> | |
37 | #include <asm/shmparam.h> | |
38 | #include <asm/sysmips.h> | |
39 | #include <asm/uaccess.h> | |
40 | ||
41 | asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs) | |
42 | { | |
43 | int fd[2]; | |
44 | int error, res; | |
45 | ||
46 | error = do_pipe(fd); | |
47 | if (error) { | |
48 | res = error; | |
49 | goto out; | |
50 | } | |
51 | regs.regs[3] = fd[1]; | |
52 | res = fd[0]; | |
53 | out: | |
54 | return res; | |
55 | } | |
56 | ||
57 | unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */ | |
58 | ||
59 | #define COLOUR_ALIGN(addr,pgoff) \ | |
60 | ((((addr) + shm_align_mask) & ~shm_align_mask) + \ | |
61 | (((pgoff) << PAGE_SHIFT) & shm_align_mask)) | |
62 | ||
63 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, | |
64 | unsigned long len, unsigned long pgoff, unsigned long flags) | |
65 | { | |
66 | struct vm_area_struct * vmm; | |
67 | int do_color_align; | |
68 | unsigned long task_size; | |
69 | ||
70 | task_size = STACK_TOP; | |
71 | ||
72 | if (flags & MAP_FIXED) { | |
73 | /* | |
74 | * We do not accept a shared mapping if it would violate | |
75 | * cache aliasing constraints. | |
76 | */ | |
77 | if ((flags & MAP_SHARED) && (addr & shm_align_mask)) | |
78 | return -EINVAL; | |
79 | return addr; | |
80 | } | |
81 | ||
82 | if (len > task_size) | |
83 | return -ENOMEM; | |
84 | do_color_align = 0; | |
85 | if (filp || (flags & MAP_SHARED)) | |
86 | do_color_align = 1; | |
87 | if (addr) { | |
88 | if (do_color_align) | |
89 | addr = COLOUR_ALIGN(addr, pgoff); | |
90 | else | |
91 | addr = PAGE_ALIGN(addr); | |
92 | vmm = find_vma(current->mm, addr); | |
93 | if (task_size - len >= addr && | |
94 | (!vmm || addr + len <= vmm->vm_start)) | |
95 | return addr; | |
96 | } | |
97 | addr = TASK_UNMAPPED_BASE; | |
98 | if (do_color_align) | |
99 | addr = COLOUR_ALIGN(addr, pgoff); | |
100 | else | |
101 | addr = PAGE_ALIGN(addr); | |
102 | ||
103 | for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) { | |
104 | /* At this point: (!vmm || addr < vmm->vm_end). */ | |
105 | if (task_size - len < addr) | |
106 | return -ENOMEM; | |
107 | if (!vmm || addr + len <= vmm->vm_start) | |
108 | return addr; | |
109 | addr = vmm->vm_end; | |
110 | if (do_color_align) | |
111 | addr = COLOUR_ALIGN(addr, pgoff); | |
112 | } | |
113 | } | |
114 | ||
115 | /* common code for old and new mmaps */ | |
116 | static inline unsigned long | |
117 | do_mmap2(unsigned long addr, unsigned long len, unsigned long prot, | |
118 | unsigned long flags, unsigned long fd, unsigned long pgoff) | |
119 | { | |
120 | unsigned long error = -EBADF; | |
121 | struct file * file = NULL; | |
122 | ||
123 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
124 | if (!(flags & MAP_ANONYMOUS)) { | |
125 | file = fget(fd); | |
126 | if (!file) | |
127 | goto out; | |
128 | } | |
129 | ||
130 | down_write(¤t->mm->mmap_sem); | |
131 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
132 | up_write(¤t->mm->mmap_sem); | |
133 | ||
134 | if (file) | |
135 | fput(file); | |
136 | out: | |
137 | return error; | |
138 | } | |
139 | ||
140 | asmlinkage unsigned long | |
141 | old_mmap(unsigned long addr, unsigned long len, int prot, | |
142 | int flags, int fd, off_t offset) | |
143 | { | |
144 | unsigned long result; | |
145 | ||
146 | result = -EINVAL; | |
147 | if (offset & ~PAGE_MASK) | |
148 | goto out; | |
149 | ||
150 | result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); | |
151 | ||
152 | out: | |
153 | return result; | |
154 | } | |
155 | ||
156 | asmlinkage unsigned long | |
157 | sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot, | |
158 | unsigned long flags, unsigned long fd, unsigned long pgoff) | |
159 | { | |
160 | return do_mmap2(addr, len, prot, flags, fd, pgoff); | |
161 | } | |
162 | ||
163 | save_static_function(sys_fork); | |
164 | __attribute_used__ noinline static int | |
165 | _sys_fork(nabi_no_regargs struct pt_regs regs) | |
166 | { | |
167 | return do_fork(SIGCHLD, regs.regs[29], ®s, 0, NULL, NULL); | |
168 | } | |
169 | ||
170 | save_static_function(sys_clone); | |
171 | __attribute_used__ noinline static int | |
172 | _sys_clone(nabi_no_regargs struct pt_regs regs) | |
173 | { | |
174 | unsigned long clone_flags; | |
175 | unsigned long newsp; | |
176 | int *parent_tidptr, *child_tidptr; | |
177 | ||
178 | clone_flags = regs.regs[4]; | |
179 | newsp = regs.regs[5]; | |
180 | if (!newsp) | |
181 | newsp = regs.regs[29]; | |
182 | parent_tidptr = (int *) regs.regs[6]; | |
183 | child_tidptr = (int *) regs.regs[7]; | |
184 | return do_fork(clone_flags, newsp, ®s, 0, | |
185 | parent_tidptr, child_tidptr); | |
186 | } | |
187 | ||
188 | /* | |
189 | * sys_execve() executes a new program. | |
190 | */ | |
191 | asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs) | |
192 | { | |
193 | int error; | |
194 | char * filename; | |
195 | ||
196 | filename = getname((char *) (long)regs.regs[4]); | |
197 | error = PTR_ERR(filename); | |
198 | if (IS_ERR(filename)) | |
199 | goto out; | |
200 | error = do_execve(filename, (char **) (long)regs.regs[5], | |
201 | (char **) (long)regs.regs[6], ®s); | |
202 | putname(filename); | |
203 | ||
204 | out: | |
205 | return error; | |
206 | } | |
207 | ||
208 | /* | |
209 | * Compacrapability ... | |
210 | */ | |
211 | asmlinkage int sys_uname(struct old_utsname * name) | |
212 | { | |
213 | if (name && !copy_to_user(name, &system_utsname, sizeof (*name))) | |
214 | return 0; | |
215 | return -EFAULT; | |
216 | } | |
217 | ||
218 | /* | |
219 | * Compacrapability ... | |
220 | */ | |
221 | asmlinkage int sys_olduname(struct oldold_utsname * name) | |
222 | { | |
223 | int error; | |
224 | ||
225 | if (!name) | |
226 | return -EFAULT; | |
227 | if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) | |
228 | return -EFAULT; | |
229 | ||
230 | error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN); | |
231 | error -= __put_user(0,name->sysname+__OLD_UTS_LEN); | |
232 | error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN); | |
233 | error -= __put_user(0,name->nodename+__OLD_UTS_LEN); | |
234 | error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN); | |
235 | error -= __put_user(0,name->release+__OLD_UTS_LEN); | |
236 | error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN); | |
237 | error -= __put_user(0,name->version+__OLD_UTS_LEN); | |
238 | error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN); | |
239 | error = __put_user(0,name->machine+__OLD_UTS_LEN); | |
240 | error = error ? -EFAULT : 0; | |
241 | ||
242 | return error; | |
243 | } | |
244 | ||
245 | asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) | |
246 | { | |
247 | int tmp, len; | |
248 | char *name; | |
249 | ||
250 | switch(cmd) { | |
251 | case SETNAME: { | |
252 | char nodename[__NEW_UTS_LEN + 1]; | |
253 | ||
254 | if (!capable(CAP_SYS_ADMIN)) | |
255 | return -EPERM; | |
256 | ||
257 | name = (char *) arg1; | |
258 | ||
259 | len = strncpy_from_user(nodename, name, __NEW_UTS_LEN); | |
260 | if (len < 0) | |
261 | return -EFAULT; | |
262 | ||
263 | down_write(&uts_sem); | |
264 | strncpy(system_utsname.nodename, nodename, len); | |
265 | nodename[__NEW_UTS_LEN] = '\0'; | |
266 | strlcpy(system_utsname.nodename, nodename, | |
267 | sizeof(system_utsname.nodename)); | |
268 | up_write(&uts_sem); | |
269 | return 0; | |
270 | } | |
271 | ||
272 | case MIPS_ATOMIC_SET: | |
273 | printk(KERN_CRIT "How did I get here?\n"); | |
274 | return -EINVAL; | |
275 | ||
276 | case MIPS_FIXADE: | |
277 | tmp = current->thread.mflags & ~3; | |
278 | current->thread.mflags = tmp | (arg1 & 3); | |
279 | return 0; | |
280 | ||
281 | case FLUSH_CACHE: | |
282 | __flush_cache_all(); | |
283 | return 0; | |
284 | ||
285 | case MIPS_RDNVRAM: | |
286 | return -EIO; | |
287 | } | |
288 | ||
289 | return -EINVAL; | |
290 | } | |
291 | ||
292 | /* | |
293 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
294 | * | |
295 | * This is really horribly ugly. | |
296 | */ | |
297 | asmlinkage int sys_ipc (uint call, int first, int second, | |
298 | unsigned long third, void *ptr, long fifth) | |
299 | { | |
300 | int version, ret; | |
301 | ||
302 | version = call >> 16; /* hack for backward compatibility */ | |
303 | call &= 0xffff; | |
304 | ||
305 | switch (call) { | |
306 | case SEMOP: | |
307 | return sys_semtimedop (first, (struct sembuf *)ptr, second, | |
308 | NULL); | |
309 | case SEMTIMEDOP: | |
310 | return sys_semtimedop (first, (struct sembuf *)ptr, second, | |
311 | (const struct timespec __user *)fifth); | |
312 | case SEMGET: | |
313 | return sys_semget (first, second, third); | |
314 | case SEMCTL: { | |
315 | union semun fourth; | |
316 | if (!ptr) | |
317 | return -EINVAL; | |
318 | if (get_user(fourth.__pad, (void **) ptr)) | |
319 | return -EFAULT; | |
320 | return sys_semctl (first, second, third, fourth); | |
321 | } | |
322 | ||
323 | case MSGSND: | |
324 | return sys_msgsnd (first, (struct msgbuf *) ptr, | |
325 | second, third); | |
326 | case MSGRCV: | |
327 | switch (version) { | |
328 | case 0: { | |
329 | struct ipc_kludge tmp; | |
330 | if (!ptr) | |
331 | return -EINVAL; | |
332 | ||
333 | if (copy_from_user(&tmp, | |
334 | (struct ipc_kludge *) ptr, | |
335 | sizeof (tmp))) | |
336 | return -EFAULT; | |
337 | return sys_msgrcv (first, tmp.msgp, second, | |
338 | tmp.msgtyp, third); | |
339 | } | |
340 | default: | |
341 | return sys_msgrcv (first, | |
342 | (struct msgbuf *) ptr, | |
343 | second, fifth, third); | |
344 | } | |
345 | case MSGGET: | |
346 | return sys_msgget ((key_t) first, second); | |
347 | case MSGCTL: | |
348 | return sys_msgctl (first, second, (struct msqid_ds *) ptr); | |
349 | ||
350 | case SHMAT: | |
351 | switch (version) { | |
352 | default: { | |
353 | ulong raddr; | |
354 | ret = do_shmat (first, (char *) ptr, second, &raddr); | |
355 | if (ret) | |
356 | return ret; | |
357 | return put_user (raddr, (ulong *) third); | |
358 | } | |
359 | case 1: /* iBCS2 emulator entry point */ | |
360 | if (!segment_eq(get_fs(), get_ds())) | |
361 | return -EINVAL; | |
362 | return do_shmat (first, (char *) ptr, second, (ulong *) third); | |
363 | } | |
364 | case SHMDT: | |
365 | return sys_shmdt ((char *)ptr); | |
366 | case SHMGET: | |
367 | return sys_shmget (first, second, third); | |
368 | case SHMCTL: | |
369 | return sys_shmctl (first, second, | |
370 | (struct shmid_ds *) ptr); | |
371 | default: | |
372 | return -ENOSYS; | |
373 | } | |
374 | } | |
375 | ||
1da177e4 LT |
376 | /* |
377 | * No implemented yet ... | |
378 | */ | |
379 | asmlinkage int sys_cachectl(char *addr, int nbytes, int op) | |
380 | { | |
381 | return -ENOSYS; | |
382 | } | |
383 | ||
384 | /* | |
385 | * If we ever come here the user sp is bad. Zap the process right away. | |
386 | * Due to the bad stack signaling wouldn't work. | |
387 | */ | |
388 | asmlinkage void bad_stack(void) | |
389 | { | |
390 | do_exit(SIGSEGV); | |
391 | } |