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