Commit | Line | Data |
---|---|---|
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 | */ | |
3c37026d | 10 | #include <linux/config.h> |
1da177e4 | 11 | #include <linux/a.out.h> |
a9415644 | 12 | #include <linux/capability.h> |
1da177e4 LT |
13 | #include <linux/errno.h> |
14 | #include <linux/linkage.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/smp.h> | |
17 | #include <linux/smp_lock.h> | |
18 | #include <linux/mman.h> | |
19 | #include <linux/ptrace.h> | |
20 | #include <linux/sched.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/syscalls.h> | |
23 | #include <linux/file.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/utsname.h> | |
26 | #include <linux/unistd.h> | |
27 | #include <linux/sem.h> | |
28 | #include <linux/msg.h> | |
29 | #include <linux/shm.h> | |
30 | #include <linux/compiler.h> | |
9ff77c46 | 31 | #include <linux/module.h> |
1da177e4 LT |
32 | |
33 | #include <asm/branch.h> | |
34 | #include <asm/cachectl.h> | |
35 | #include <asm/cacheflush.h> | |
36 | #include <asm/ipc.h> | |
048eb582 | 37 | #include <asm/asm-offsets.h> |
1da177e4 LT |
38 | #include <asm/signal.h> |
39 | #include <asm/sim.h> | |
40 | #include <asm/shmparam.h> | |
41 | #include <asm/sysmips.h> | |
42 | #include <asm/uaccess.h> | |
43 | ||
44 | asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs) | |
45 | { | |
46 | int fd[2]; | |
47 | int error, res; | |
48 | ||
49 | error = do_pipe(fd); | |
50 | if (error) { | |
51 | res = error; | |
52 | goto out; | |
53 | } | |
54 | regs.regs[3] = fd[1]; | |
55 | res = fd[0]; | |
56 | out: | |
57 | return res; | |
58 | } | |
59 | ||
60 | unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */ | |
61 | ||
9ff77c46 RB |
62 | EXPORT_SYMBOL(shm_align_mask); |
63 | ||
1da177e4 LT |
64 | #define COLOUR_ALIGN(addr,pgoff) \ |
65 | ((((addr) + shm_align_mask) & ~shm_align_mask) + \ | |
66 | (((pgoff) << PAGE_SHIFT) & shm_align_mask)) | |
67 | ||
68 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, | |
69 | unsigned long len, unsigned long pgoff, unsigned long flags) | |
70 | { | |
71 | struct vm_area_struct * vmm; | |
72 | int do_color_align; | |
73 | unsigned long task_size; | |
74 | ||
75 | task_size = STACK_TOP; | |
76 | ||
77 | if (flags & MAP_FIXED) { | |
78 | /* | |
79 | * We do not accept a shared mapping if it would violate | |
80 | * cache aliasing constraints. | |
81 | */ | |
82 | if ((flags & MAP_SHARED) && (addr & shm_align_mask)) | |
83 | return -EINVAL; | |
84 | return addr; | |
85 | } | |
86 | ||
87 | if (len > task_size) | |
88 | return -ENOMEM; | |
89 | do_color_align = 0; | |
90 | if (filp || (flags & MAP_SHARED)) | |
91 | do_color_align = 1; | |
92 | if (addr) { | |
93 | if (do_color_align) | |
94 | addr = COLOUR_ALIGN(addr, pgoff); | |
95 | else | |
96 | addr = PAGE_ALIGN(addr); | |
97 | vmm = find_vma(current->mm, addr); | |
98 | if (task_size - len >= addr && | |
99 | (!vmm || addr + len <= vmm->vm_start)) | |
100 | return addr; | |
101 | } | |
102 | addr = TASK_UNMAPPED_BASE; | |
103 | if (do_color_align) | |
104 | addr = COLOUR_ALIGN(addr, pgoff); | |
105 | else | |
106 | addr = PAGE_ALIGN(addr); | |
107 | ||
108 | for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) { | |
109 | /* At this point: (!vmm || addr < vmm->vm_end). */ | |
110 | if (task_size - len < addr) | |
111 | return -ENOMEM; | |
112 | if (!vmm || addr + len <= vmm->vm_start) | |
113 | return addr; | |
114 | addr = vmm->vm_end; | |
115 | if (do_color_align) | |
116 | addr = COLOUR_ALIGN(addr, pgoff); | |
117 | } | |
118 | } | |
119 | ||
120 | /* common code for old and new mmaps */ | |
121 | static inline unsigned long | |
122 | do_mmap2(unsigned long addr, unsigned long len, unsigned long prot, | |
123 | unsigned long flags, unsigned long fd, unsigned long pgoff) | |
124 | { | |
125 | unsigned long error = -EBADF; | |
126 | struct file * file = NULL; | |
127 | ||
128 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
129 | if (!(flags & MAP_ANONYMOUS)) { | |
130 | file = fget(fd); | |
131 | if (!file) | |
132 | goto out; | |
133 | } | |
134 | ||
135 | down_write(¤t->mm->mmap_sem); | |
136 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
137 | up_write(¤t->mm->mmap_sem); | |
138 | ||
139 | if (file) | |
140 | fput(file); | |
141 | out: | |
142 | return error; | |
143 | } | |
144 | ||
145 | asmlinkage unsigned long | |
146 | old_mmap(unsigned long addr, unsigned long len, int prot, | |
147 | int flags, int fd, off_t offset) | |
148 | { | |
149 | unsigned long result; | |
150 | ||
151 | result = -EINVAL; | |
152 | if (offset & ~PAGE_MASK) | |
153 | goto out; | |
154 | ||
155 | result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); | |
156 | ||
157 | out: | |
158 | return result; | |
159 | } | |
160 | ||
161 | asmlinkage unsigned long | |
162 | sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot, | |
163 | unsigned long flags, unsigned long fd, unsigned long pgoff) | |
164 | { | |
165 | return do_mmap2(addr, len, prot, flags, fd, pgoff); | |
166 | } | |
167 | ||
168 | save_static_function(sys_fork); | |
169 | __attribute_used__ noinline static int | |
170 | _sys_fork(nabi_no_regargs struct pt_regs regs) | |
171 | { | |
172 | return do_fork(SIGCHLD, regs.regs[29], ®s, 0, NULL, NULL); | |
173 | } | |
174 | ||
175 | save_static_function(sys_clone); | |
176 | __attribute_used__ noinline static int | |
177 | _sys_clone(nabi_no_regargs struct pt_regs regs) | |
178 | { | |
179 | unsigned long clone_flags; | |
180 | unsigned long newsp; | |
3c37026d | 181 | int __user *parent_tidptr, *child_tidptr; |
1da177e4 LT |
182 | |
183 | clone_flags = regs.regs[4]; | |
184 | newsp = regs.regs[5]; | |
185 | if (!newsp) | |
186 | newsp = regs.regs[29]; | |
3c37026d RB |
187 | parent_tidptr = (int __user *) regs.regs[6]; |
188 | #ifdef CONFIG_32BIT | |
189 | /* We need to fetch the fifth argument off the stack. */ | |
190 | child_tidptr = NULL; | |
191 | if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) { | |
192 | int __user *__user *usp = (int __user *__user *) regs.regs[29]; | |
193 | if (regs.regs[2] == __NR_syscall) { | |
194 | if (get_user (child_tidptr, &usp[5])) | |
195 | return -EFAULT; | |
196 | } | |
197 | else if (get_user (child_tidptr, &usp[4])) | |
198 | return -EFAULT; | |
199 | } | |
200 | #else | |
201 | child_tidptr = (int __user *) regs.regs[8]; | |
202 | #endif | |
1da177e4 LT |
203 | return do_fork(clone_flags, newsp, ®s, 0, |
204 | parent_tidptr, child_tidptr); | |
205 | } | |
206 | ||
207 | /* | |
208 | * sys_execve() executes a new program. | |
209 | */ | |
210 | asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs) | |
211 | { | |
212 | int error; | |
213 | char * filename; | |
214 | ||
215 | filename = getname((char *) (long)regs.regs[4]); | |
216 | error = PTR_ERR(filename); | |
217 | if (IS_ERR(filename)) | |
218 | goto out; | |
219 | error = do_execve(filename, (char **) (long)regs.regs[5], | |
220 | (char **) (long)regs.regs[6], ®s); | |
221 | putname(filename); | |
222 | ||
223 | out: | |
224 | return error; | |
225 | } | |
226 | ||
227 | /* | |
228 | * Compacrapability ... | |
229 | */ | |
230 | asmlinkage int sys_uname(struct old_utsname * name) | |
231 | { | |
232 | if (name && !copy_to_user(name, &system_utsname, sizeof (*name))) | |
233 | return 0; | |
234 | return -EFAULT; | |
235 | } | |
236 | ||
237 | /* | |
238 | * Compacrapability ... | |
239 | */ | |
240 | asmlinkage int sys_olduname(struct oldold_utsname * name) | |
241 | { | |
242 | int error; | |
243 | ||
244 | if (!name) | |
245 | return -EFAULT; | |
246 | if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) | |
247 | return -EFAULT; | |
248 | ||
249 | error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN); | |
250 | error -= __put_user(0,name->sysname+__OLD_UTS_LEN); | |
251 | error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN); | |
252 | error -= __put_user(0,name->nodename+__OLD_UTS_LEN); | |
253 | error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN); | |
254 | error -= __put_user(0,name->release+__OLD_UTS_LEN); | |
255 | error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN); | |
256 | error -= __put_user(0,name->version+__OLD_UTS_LEN); | |
257 | error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN); | |
258 | error = __put_user(0,name->machine+__OLD_UTS_LEN); | |
259 | error = error ? -EFAULT : 0; | |
260 | ||
261 | return error; | |
262 | } | |
263 | ||
3c37026d RB |
264 | void sys_set_thread_area(unsigned long addr) |
265 | { | |
dc8f6029 | 266 | struct thread_info *ti = task_thread_info(current); |
3c37026d RB |
267 | |
268 | ti->tp_value = addr; | |
269 | ||
270 | /* If some future MIPS implementation has this register in hardware, | |
271 | * we will need to update it here (and in context switches). */ | |
272 | } | |
273 | ||
1da177e4 LT |
274 | asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) |
275 | { | |
276 | int tmp, len; | |
277 | char *name; | |
278 | ||
279 | switch(cmd) { | |
280 | case SETNAME: { | |
281 | char nodename[__NEW_UTS_LEN + 1]; | |
282 | ||
283 | if (!capable(CAP_SYS_ADMIN)) | |
284 | return -EPERM; | |
285 | ||
286 | name = (char *) arg1; | |
287 | ||
288 | len = strncpy_from_user(nodename, name, __NEW_UTS_LEN); | |
289 | if (len < 0) | |
290 | return -EFAULT; | |
291 | ||
292 | down_write(&uts_sem); | |
293 | strncpy(system_utsname.nodename, nodename, len); | |
294 | nodename[__NEW_UTS_LEN] = '\0'; | |
295 | strlcpy(system_utsname.nodename, nodename, | |
296 | sizeof(system_utsname.nodename)); | |
297 | up_write(&uts_sem); | |
298 | return 0; | |
299 | } | |
300 | ||
301 | case MIPS_ATOMIC_SET: | |
302 | printk(KERN_CRIT "How did I get here?\n"); | |
303 | return -EINVAL; | |
304 | ||
305 | case MIPS_FIXADE: | |
306 | tmp = current->thread.mflags & ~3; | |
307 | current->thread.mflags = tmp | (arg1 & 3); | |
308 | return 0; | |
309 | ||
310 | case FLUSH_CACHE: | |
311 | __flush_cache_all(); | |
312 | return 0; | |
313 | ||
314 | case MIPS_RDNVRAM: | |
315 | return -EIO; | |
316 | } | |
317 | ||
318 | return -EINVAL; | |
319 | } | |
320 | ||
321 | /* | |
322 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
323 | * | |
324 | * This is really horribly ugly. | |
325 | */ | |
326 | asmlinkage int sys_ipc (uint call, int first, int second, | |
327 | unsigned long third, void *ptr, long fifth) | |
328 | { | |
329 | int version, ret; | |
330 | ||
331 | version = call >> 16; /* hack for backward compatibility */ | |
332 | call &= 0xffff; | |
333 | ||
334 | switch (call) { | |
335 | case SEMOP: | |
336 | return sys_semtimedop (first, (struct sembuf *)ptr, second, | |
337 | NULL); | |
338 | case SEMTIMEDOP: | |
339 | return sys_semtimedop (first, (struct sembuf *)ptr, second, | |
340 | (const struct timespec __user *)fifth); | |
341 | case SEMGET: | |
342 | return sys_semget (first, second, third); | |
343 | case SEMCTL: { | |
344 | union semun fourth; | |
345 | if (!ptr) | |
346 | return -EINVAL; | |
347 | if (get_user(fourth.__pad, (void **) ptr)) | |
348 | return -EFAULT; | |
349 | return sys_semctl (first, second, third, fourth); | |
350 | } | |
351 | ||
352 | case MSGSND: | |
353 | return sys_msgsnd (first, (struct msgbuf *) ptr, | |
354 | second, third); | |
355 | case MSGRCV: | |
356 | switch (version) { | |
357 | case 0: { | |
358 | struct ipc_kludge tmp; | |
359 | if (!ptr) | |
360 | return -EINVAL; | |
361 | ||
362 | if (copy_from_user(&tmp, | |
363 | (struct ipc_kludge *) ptr, | |
364 | sizeof (tmp))) | |
365 | return -EFAULT; | |
366 | return sys_msgrcv (first, tmp.msgp, second, | |
367 | tmp.msgtyp, third); | |
368 | } | |
369 | default: | |
370 | return sys_msgrcv (first, | |
371 | (struct msgbuf *) ptr, | |
372 | second, fifth, third); | |
373 | } | |
374 | case MSGGET: | |
375 | return sys_msgget ((key_t) first, second); | |
376 | case MSGCTL: | |
377 | return sys_msgctl (first, second, (struct msqid_ds *) ptr); | |
378 | ||
379 | case SHMAT: | |
380 | switch (version) { | |
381 | default: { | |
382 | ulong raddr; | |
383 | ret = do_shmat (first, (char *) ptr, second, &raddr); | |
384 | if (ret) | |
385 | return ret; | |
386 | return put_user (raddr, (ulong *) third); | |
387 | } | |
388 | case 1: /* iBCS2 emulator entry point */ | |
389 | if (!segment_eq(get_fs(), get_ds())) | |
390 | return -EINVAL; | |
391 | return do_shmat (first, (char *) ptr, second, (ulong *) third); | |
392 | } | |
393 | case SHMDT: | |
394 | return sys_shmdt ((char *)ptr); | |
395 | case SHMGET: | |
396 | return sys_shmget (first, second, third); | |
397 | case SHMCTL: | |
398 | return sys_shmctl (first, second, | |
399 | (struct shmid_ds *) ptr); | |
400 | default: | |
401 | return -ENOSYS; | |
402 | } | |
403 | } | |
404 | ||
1da177e4 LT |
405 | /* |
406 | * No implemented yet ... | |
407 | */ | |
408 | asmlinkage int sys_cachectl(char *addr, int nbytes, int op) | |
409 | { | |
410 | return -ENOSYS; | |
411 | } | |
412 | ||
413 | /* | |
414 | * If we ever come here the user sp is bad. Zap the process right away. | |
415 | * Due to the bad stack signaling wouldn't work. | |
416 | */ | |
417 | asmlinkage void bad_stack(void) | |
418 | { | |
419 | do_exit(SIGSEGV); | |
420 | } |