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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 | */ | |
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 | { | |
947df17c PA |
165 | if (pgoff & (~PAGE_MASK >> 12)) |
166 | return -EINVAL; | |
167 | ||
168 | return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12)); | |
1da177e4 LT |
169 | } |
170 | ||
171 | save_static_function(sys_fork); | |
172 | __attribute_used__ noinline static int | |
173 | _sys_fork(nabi_no_regargs struct pt_regs regs) | |
174 | { | |
175 | return do_fork(SIGCHLD, regs.regs[29], ®s, 0, NULL, NULL); | |
176 | } | |
177 | ||
178 | save_static_function(sys_clone); | |
179 | __attribute_used__ noinline static int | |
180 | _sys_clone(nabi_no_regargs struct pt_regs regs) | |
181 | { | |
182 | unsigned long clone_flags; | |
183 | unsigned long newsp; | |
3c37026d | 184 | int __user *parent_tidptr, *child_tidptr; |
1da177e4 LT |
185 | |
186 | clone_flags = regs.regs[4]; | |
187 | newsp = regs.regs[5]; | |
188 | if (!newsp) | |
189 | newsp = regs.regs[29]; | |
3c37026d RB |
190 | parent_tidptr = (int __user *) regs.regs[6]; |
191 | #ifdef CONFIG_32BIT | |
192 | /* We need to fetch the fifth argument off the stack. */ | |
193 | child_tidptr = NULL; | |
194 | if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) { | |
195 | int __user *__user *usp = (int __user *__user *) regs.regs[29]; | |
196 | if (regs.regs[2] == __NR_syscall) { | |
197 | if (get_user (child_tidptr, &usp[5])) | |
198 | return -EFAULT; | |
199 | } | |
200 | else if (get_user (child_tidptr, &usp[4])) | |
201 | return -EFAULT; | |
202 | } | |
203 | #else | |
204 | child_tidptr = (int __user *) regs.regs[8]; | |
205 | #endif | |
1da177e4 LT |
206 | return do_fork(clone_flags, newsp, ®s, 0, |
207 | parent_tidptr, child_tidptr); | |
208 | } | |
209 | ||
210 | /* | |
211 | * sys_execve() executes a new program. | |
212 | */ | |
213 | asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs) | |
214 | { | |
215 | int error; | |
216 | char * filename; | |
217 | ||
be6e518b | 218 | filename = getname((char __user *) (long)regs.regs[4]); |
1da177e4 LT |
219 | error = PTR_ERR(filename); |
220 | if (IS_ERR(filename)) | |
221 | goto out; | |
be6e518b AN |
222 | error = do_execve(filename, (char __user *__user *) (long)regs.regs[5], |
223 | (char __user *__user *) (long)regs.regs[6], ®s); | |
1da177e4 LT |
224 | putname(filename); |
225 | ||
226 | out: | |
227 | return error; | |
228 | } | |
229 | ||
230 | /* | |
231 | * Compacrapability ... | |
232 | */ | |
be6e518b | 233 | asmlinkage int sys_uname(struct old_utsname __user * name) |
1da177e4 LT |
234 | { |
235 | if (name && !copy_to_user(name, &system_utsname, sizeof (*name))) | |
236 | return 0; | |
237 | return -EFAULT; | |
238 | } | |
239 | ||
240 | /* | |
241 | * Compacrapability ... | |
242 | */ | |
be6e518b | 243 | asmlinkage int sys_olduname(struct oldold_utsname __user * name) |
1da177e4 LT |
244 | { |
245 | int error; | |
246 | ||
247 | if (!name) | |
248 | return -EFAULT; | |
249 | if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) | |
250 | return -EFAULT; | |
251 | ||
252 | error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN); | |
253 | error -= __put_user(0,name->sysname+__OLD_UTS_LEN); | |
254 | error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN); | |
255 | error -= __put_user(0,name->nodename+__OLD_UTS_LEN); | |
256 | error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN); | |
257 | error -= __put_user(0,name->release+__OLD_UTS_LEN); | |
258 | error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN); | |
259 | error -= __put_user(0,name->version+__OLD_UTS_LEN); | |
260 | error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN); | |
261 | error = __put_user(0,name->machine+__OLD_UTS_LEN); | |
262 | error = error ? -EFAULT : 0; | |
263 | ||
264 | return error; | |
265 | } | |
266 | ||
3c37026d RB |
267 | void sys_set_thread_area(unsigned long addr) |
268 | { | |
dc8f6029 | 269 | struct thread_info *ti = task_thread_info(current); |
3c37026d RB |
270 | |
271 | ti->tp_value = addr; | |
272 | ||
273 | /* If some future MIPS implementation has this register in hardware, | |
274 | * we will need to update it here (and in context switches). */ | |
275 | } | |
276 | ||
1da177e4 LT |
277 | asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3) |
278 | { | |
ecf52d3c | 279 | int tmp; |
1da177e4 LT |
280 | |
281 | switch(cmd) { | |
1da177e4 LT |
282 | case MIPS_ATOMIC_SET: |
283 | printk(KERN_CRIT "How did I get here?\n"); | |
284 | return -EINVAL; | |
285 | ||
286 | case MIPS_FIXADE: | |
287 | tmp = current->thread.mflags & ~3; | |
288 | current->thread.mflags = tmp | (arg1 & 3); | |
289 | return 0; | |
290 | ||
291 | case FLUSH_CACHE: | |
292 | __flush_cache_all(); | |
293 | return 0; | |
1da177e4 LT |
294 | } |
295 | ||
296 | return -EINVAL; | |
297 | } | |
298 | ||
299 | /* | |
300 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
301 | * | |
302 | * This is really horribly ugly. | |
303 | */ | |
fc103349 | 304 | asmlinkage int sys_ipc (unsigned int call, int first, int second, |
be6e518b | 305 | unsigned long third, void __user *ptr, long fifth) |
1da177e4 LT |
306 | { |
307 | int version, ret; | |
308 | ||
309 | version = call >> 16; /* hack for backward compatibility */ | |
310 | call &= 0xffff; | |
311 | ||
312 | switch (call) { | |
313 | case SEMOP: | |
be6e518b AN |
314 | return sys_semtimedop (first, (struct sembuf __user *)ptr, |
315 | second, NULL); | |
1da177e4 | 316 | case SEMTIMEDOP: |
be6e518b AN |
317 | return sys_semtimedop (first, (struct sembuf __user *)ptr, |
318 | second, | |
319 | (const struct timespec __user *)fifth); | |
1da177e4 LT |
320 | case SEMGET: |
321 | return sys_semget (first, second, third); | |
322 | case SEMCTL: { | |
323 | union semun fourth; | |
324 | if (!ptr) | |
325 | return -EINVAL; | |
219ac73a | 326 | if (get_user(fourth.__pad, (void __user *__user *) ptr)) |
1da177e4 LT |
327 | return -EFAULT; |
328 | return sys_semctl (first, second, third, fourth); | |
329 | } | |
330 | ||
331 | case MSGSND: | |
be6e518b | 332 | return sys_msgsnd (first, (struct msgbuf __user *) ptr, |
1da177e4 LT |
333 | second, third); |
334 | case MSGRCV: | |
335 | switch (version) { | |
336 | case 0: { | |
337 | struct ipc_kludge tmp; | |
338 | if (!ptr) | |
339 | return -EINVAL; | |
340 | ||
341 | if (copy_from_user(&tmp, | |
be6e518b | 342 | (struct ipc_kludge __user *) ptr, |
1da177e4 LT |
343 | sizeof (tmp))) |
344 | return -EFAULT; | |
345 | return sys_msgrcv (first, tmp.msgp, second, | |
346 | tmp.msgtyp, third); | |
347 | } | |
348 | default: | |
349 | return sys_msgrcv (first, | |
be6e518b | 350 | (struct msgbuf __user *) ptr, |
1da177e4 LT |
351 | second, fifth, third); |
352 | } | |
353 | case MSGGET: | |
354 | return sys_msgget ((key_t) first, second); | |
355 | case MSGCTL: | |
be6e518b AN |
356 | return sys_msgctl (first, second, |
357 | (struct msqid_ds __user *) ptr); | |
1da177e4 LT |
358 | |
359 | case SHMAT: | |
360 | switch (version) { | |
361 | default: { | |
fc103349 | 362 | unsigned long raddr; |
be6e518b AN |
363 | ret = do_shmat (first, (char __user *) ptr, second, |
364 | &raddr); | |
1da177e4 LT |
365 | if (ret) |
366 | return ret; | |
fc103349 | 367 | return put_user (raddr, (unsigned long __user *) third); |
1da177e4 LT |
368 | } |
369 | case 1: /* iBCS2 emulator entry point */ | |
370 | if (!segment_eq(get_fs(), get_ds())) | |
371 | return -EINVAL; | |
be6e518b | 372 | return do_shmat (first, (char __user *) ptr, second, |
fc103349 | 373 | (unsigned long *) third); |
1da177e4 LT |
374 | } |
375 | case SHMDT: | |
be6e518b | 376 | return sys_shmdt ((char __user *)ptr); |
1da177e4 LT |
377 | case SHMGET: |
378 | return sys_shmget (first, second, third); | |
379 | case SHMCTL: | |
380 | return sys_shmctl (first, second, | |
be6e518b | 381 | (struct shmid_ds __user *) ptr); |
1da177e4 LT |
382 | default: |
383 | return -ENOSYS; | |
384 | } | |
385 | } | |
386 | ||
1da177e4 LT |
387 | /* |
388 | * No implemented yet ... | |
389 | */ | |
390 | asmlinkage int sys_cachectl(char *addr, int nbytes, int op) | |
391 | { | |
392 | return -ENOSYS; | |
393 | } | |
394 | ||
395 | /* | |
396 | * If we ever come here the user sp is bad. Zap the process right away. | |
397 | * Due to the bad stack signaling wouldn't work. | |
398 | */ | |
399 | asmlinkage void bad_stack(void) | |
400 | { | |
401 | do_exit(SIGSEGV); | |
402 | } |