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10#include <linux/capability.h>
11#include <linux/errno.h>
12#include <linux/linkage.h>
13#include <linux/mm.h>
14#include <linux/fs.h>
15#include <linux/smp.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#include <linux/module.h>
30#include <linux/ipc.h>
31#include <linux/uaccess.h>
32
33#include <asm/asm.h>
34#include <asm/branch.h>
35#include <asm/cachectl.h>
36#include <asm/cacheflush.h>
37#include <asm/asm-offsets.h>
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
45
46
47
48
49
50
51asmlinkage int sysm_pipe(nabi_no_regargs volatile struct pt_regs regs)
52{
53 int fd[2];
54 int error, res;
55
56 error = do_pipe_flags(fd, 0);
57 if (error) {
58 res = error;
59 goto out;
60 }
61 regs.regs[3] = fd[1];
62 res = fd[0];
63out:
64 return res;
65}
66
67unsigned long shm_align_mask = PAGE_SIZE - 1;
68
69EXPORT_SYMBOL(shm_align_mask);
70
71#define COLOUR_ALIGN(addr,pgoff) \
72 ((((addr) + shm_align_mask) & ~shm_align_mask) + \
73 (((pgoff) << PAGE_SHIFT) & shm_align_mask))
74
75unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
76 unsigned long len, unsigned long pgoff, unsigned long flags)
77{
78 struct vm_area_struct * vmm;
79 int do_color_align;
80 unsigned long task_size;
81
82 task_size = STACK_TOP;
83
84 if (len > task_size)
85 return -ENOMEM;
86
87 if (flags & MAP_FIXED) {
88
89 if (task_size - len < addr)
90 return -EINVAL;
91
92
93
94
95
96 if ((flags & MAP_SHARED) &&
97 ((addr - (pgoff << PAGE_SHIFT)) & shm_align_mask))
98 return -EINVAL;
99 return addr;
100 }
101
102 do_color_align = 0;
103 if (filp || (flags & MAP_SHARED))
104 do_color_align = 1;
105 if (addr) {
106 if (do_color_align)
107 addr = COLOUR_ALIGN(addr, pgoff);
108 else
109 addr = PAGE_ALIGN(addr);
110 vmm = find_vma(current->mm, addr);
111 if (task_size - len >= addr &&
112 (!vmm || addr + len <= vmm->vm_start))
113 return addr;
114 }
115 addr = TASK_UNMAPPED_BASE;
116 if (do_color_align)
117 addr = COLOUR_ALIGN(addr, pgoff);
118 else
119 addr = PAGE_ALIGN(addr);
120
121 for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
122
123 if (task_size - len < addr)
124 return -ENOMEM;
125 if (!vmm || addr + len <= vmm->vm_start)
126 return addr;
127 addr = vmm->vm_end;
128 if (do_color_align)
129 addr = COLOUR_ALIGN(addr, pgoff);
130 }
131}
132
133SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
134 unsigned long, prot, unsigned long, flags, unsigned long,
135 fd, off_t, offset)
136{
137 unsigned long result;
138
139 result = -EINVAL;
140 if (offset & ~PAGE_MASK)
141 goto out;
142
143 result = sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
144
145out:
146 return result;
147}
148
149SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
150 unsigned long, prot, unsigned long, flags, unsigned long, fd,
151 unsigned long, pgoff)
152{
153 if (pgoff & (~PAGE_MASK >> 12))
154 return -EINVAL;
155
156 return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
157}
158
159save_static_function(sys_fork);
160static int __used noinline
161_sys_fork(nabi_no_regargs struct pt_regs regs)
162{
163 return do_fork(SIGCHLD, regs.regs[29], ®s, 0, NULL, NULL);
164}
165
166save_static_function(sys_clone);
167static int __used noinline
168_sys_clone(nabi_no_regargs struct pt_regs regs)
169{
170 unsigned long clone_flags;
171 unsigned long newsp;
172 int __user *parent_tidptr, *child_tidptr;
173
174 clone_flags = regs.regs[4];
175 newsp = regs.regs[5];
176 if (!newsp)
177 newsp = regs.regs[29];
178 parent_tidptr = (int __user *) regs.regs[6];
179#ifdef CONFIG_32BIT
180
181 child_tidptr = NULL;
182 if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
183 int __user *__user *usp = (int __user *__user *) regs.regs[29];
184 if (regs.regs[2] == __NR_syscall) {
185 if (get_user (child_tidptr, &usp[5]))
186 return -EFAULT;
187 }
188 else if (get_user (child_tidptr, &usp[4]))
189 return -EFAULT;
190 }
191#else
192 child_tidptr = (int __user *) regs.regs[8];
193#endif
194 return do_fork(clone_flags, newsp, ®s, 0,
195 parent_tidptr, child_tidptr);
196}
197
198
199
200
201asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
202{
203 int error;
204 char * filename;
205
206 filename = getname((char __user *) (long)regs.regs[4]);
207 error = PTR_ERR(filename);
208 if (IS_ERR(filename))
209 goto out;
210 error = do_execve(filename, (char __user *__user *) (long)regs.regs[5],
211 (char __user *__user *) (long)regs.regs[6], ®s);
212 putname(filename);
213
214out:
215 return error;
216}
217
218
219
220
221SYSCALL_DEFINE1(uname, struct old_utsname __user *, name)
222{
223 if (name && !copy_to_user(name, utsname(), sizeof (*name)))
224 return 0;
225 return -EFAULT;
226}
227
228
229
230
231SYSCALL_DEFINE1(olduname, struct oldold_utsname __user *, name)
232{
233 int error;
234
235 if (!name)
236 return -EFAULT;
237 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
238 return -EFAULT;
239
240 error = __copy_to_user(&name->sysname, &utsname()->sysname,
241 __OLD_UTS_LEN);
242 error -= __put_user(0, name->sysname + __OLD_UTS_LEN);
243 error -= __copy_to_user(&name->nodename, &utsname()->nodename,
244 __OLD_UTS_LEN);
245 error -= __put_user(0, name->nodename + __OLD_UTS_LEN);
246 error -= __copy_to_user(&name->release, &utsname()->release,
247 __OLD_UTS_LEN);
248 error -= __put_user(0, name->release + __OLD_UTS_LEN);
249 error -= __copy_to_user(&name->version, &utsname()->version,
250 __OLD_UTS_LEN);
251 error -= __put_user(0, name->version + __OLD_UTS_LEN);
252 error -= __copy_to_user(&name->machine, &utsname()->machine,
253 __OLD_UTS_LEN);
254 error = __put_user(0, name->machine + __OLD_UTS_LEN);
255 error = error ? -EFAULT : 0;
256
257 return error;
258}
259
260SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
261{
262 struct thread_info *ti = task_thread_info(current);
263
264 ti->tp_value = addr;
265 if (cpu_has_userlocal)
266 write_c0_userlocal(addr);
267
268 return 0;
269}
270
271static inline int mips_atomic_set(struct pt_regs *regs,
272 unsigned long addr, unsigned long new)
273{
274 unsigned long old, tmp;
275 unsigned int err;
276
277 if (unlikely(addr & 3))
278 return -EINVAL;
279
280 if (unlikely(!access_ok(VERIFY_WRITE, addr, 4)))
281 return -EINVAL;
282
283 if (cpu_has_llsc && R10000_LLSC_WAR) {
284 __asm__ __volatile__ (
285 " .set mips3 \n"
286 " li %[err], 0 \n"
287 "1: ll %[old], (%[addr]) \n"
288 " move %[tmp], %[new] \n"
289 "2: sc %[tmp], (%[addr]) \n"
290 " beqzl %[tmp], 1b \n"
291 "3: \n"
292 " .section .fixup,\"ax\" \n"
293 "4: li %[err], %[efault] \n"
294 " j 3b \n"
295 " .previous \n"
296 " .section __ex_table,\"a\" \n"
297 " "STR(PTR)" 1b, 4b \n"
298 " "STR(PTR)" 2b, 4b \n"
299 " .previous \n"
300 " .set mips0 \n"
301 : [old] "=&r" (old),
302 [err] "=&r" (err),
303 [tmp] "=&r" (tmp)
304 : [addr] "r" (addr),
305 [new] "r" (new),
306 [efault] "i" (-EFAULT)
307 : "memory");
308 } else if (cpu_has_llsc) {
309 __asm__ __volatile__ (
310 " .set mips3 \n"
311 " li %[err], 0 \n"
312 "1: ll %[old], (%[addr]) \n"
313 " move %[tmp], %[new] \n"
314 "2: sc %[tmp], (%[addr]) \n"
315 " bnez %[tmp], 4f \n"
316 "3: \n"
317 " .subsection 2 \n"
318 "4: b 1b \n"
319 " .previous \n"
320 " \n"
321 " .section .fixup,\"ax\" \n"
322 "5: li %[err], %[efault] \n"
323 " j 3b \n"
324 " .previous \n"
325 " .section __ex_table,\"a\" \n"
326 " "STR(PTR)" 1b, 5b \n"
327 " "STR(PTR)" 2b, 5b \n"
328 " .previous \n"
329 " .set mips0 \n"
330 : [old] "=&r" (old),
331 [err] "=&r" (err),
332 [tmp] "=&r" (tmp)
333 : [addr] "r" (addr),
334 [new] "r" (new),
335 [efault] "i" (-EFAULT)
336 : "memory");
337 } else {
338 do {
339 preempt_disable();
340 ll_bit = 1;
341 ll_task = current;
342 preempt_enable();
343
344 err = __get_user(old, (unsigned int *) addr);
345 err |= __put_user(new, (unsigned int *) addr);
346 if (err)
347 break;
348 rmb();
349 } while (!ll_bit);
350 }
351
352 if (unlikely(err))
353 return err;
354
355 regs->regs[2] = old;
356 regs->regs[7] = 0;
357
358
359
360
361 __asm__ __volatile__(
362 " move $29, %0 \n"
363 " j syscall_exit \n"
364 :
365 : "r" (regs));
366
367
368 while (1);
369}
370
371save_static_function(sys_sysmips);
372static int __used noinline
373_sys_sysmips(nabi_no_regargs struct pt_regs regs)
374{
375 long cmd, arg1, arg2, arg3;
376
377 cmd = regs.regs[4];
378 arg1 = regs.regs[5];
379 arg2 = regs.regs[6];
380 arg3 = regs.regs[7];
381
382 switch (cmd) {
383 case MIPS_ATOMIC_SET:
384 return mips_atomic_set(®s, arg1, arg2);
385
386 case MIPS_FIXADE:
387 if (arg1 & ~3)
388 return -EINVAL;
389
390 if (arg1 & 1)
391 set_thread_flag(TIF_FIXADE);
392 else
393 clear_thread_flag(TIF_FIXADE);
394 if (arg1 & 2)
395 set_thread_flag(TIF_LOGADE);
396 else
397 clear_thread_flag(TIF_FIXADE);
398
399 return 0;
400
401 case FLUSH_CACHE:
402 __flush_cache_all();
403 return 0;
404 }
405
406 return -EINVAL;
407}
408
409
410
411
412
413
414SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, int, second,
415 unsigned long, third, void __user *, ptr, long, fifth)
416{
417 int version, ret;
418
419 version = call >> 16;
420 call &= 0xffff;
421
422 switch (call) {
423 case SEMOP:
424 return sys_semtimedop(first, (struct sembuf __user *)ptr,
425 second, NULL);
426 case SEMTIMEDOP:
427 return sys_semtimedop(first, (struct sembuf __user *)ptr,
428 second,
429 (const struct timespec __user *)fifth);
430 case SEMGET:
431 return sys_semget(first, second, third);
432 case SEMCTL: {
433 union semun fourth;
434 if (!ptr)
435 return -EINVAL;
436 if (get_user(fourth.__pad, (void __user *__user *) ptr))
437 return -EFAULT;
438 return sys_semctl(first, second, third, fourth);
439 }
440
441 case MSGSND:
442 return sys_msgsnd(first, (struct msgbuf __user *) ptr,
443 second, third);
444 case MSGRCV:
445 switch (version) {
446 case 0: {
447 struct ipc_kludge tmp;
448 if (!ptr)
449 return -EINVAL;
450
451 if (copy_from_user(&tmp,
452 (struct ipc_kludge __user *) ptr,
453 sizeof(tmp)))
454 return -EFAULT;
455 return sys_msgrcv(first, tmp.msgp, second,
456 tmp.msgtyp, third);
457 }
458 default:
459 return sys_msgrcv(first,
460 (struct msgbuf __user *) ptr,
461 second, fifth, third);
462 }
463 case MSGGET:
464 return sys_msgget((key_t) first, second);
465 case MSGCTL:
466 return sys_msgctl(first, second,
467 (struct msqid_ds __user *) ptr);
468
469 case SHMAT:
470 switch (version) {
471 default: {
472 unsigned long raddr;
473 ret = do_shmat(first, (char __user *) ptr, second,
474 &raddr);
475 if (ret)
476 return ret;
477 return put_user(raddr, (unsigned long __user *) third);
478 }
479 case 1:
480 if (!segment_eq(get_fs(), get_ds()))
481 return -EINVAL;
482 return do_shmat(first, (char __user *) ptr, second,
483 (unsigned long *) third);
484 }
485 case SHMDT:
486 return sys_shmdt((char __user *)ptr);
487 case SHMGET:
488 return sys_shmget(first, second, third);
489 case SHMCTL:
490 return sys_shmctl(first, second,
491 (struct shmid_ds __user *) ptr);
492 default:
493 return -ENOSYS;
494 }
495}
496
497
498
499
500SYSCALL_DEFINE3(cachectl, char *, addr, int, nbytes, int, op)
501{
502 return -ENOSYS;
503}
504
505
506
507
508
509asmlinkage void bad_stack(void)
510{
511 do_exit(SIGSEGV);
512}
513
514
515
516
517
518int kernel_execve(const char *filename, char *const argv[], char *const envp[])
519{
520 register unsigned long __a0 asm("$4") = (unsigned long) filename;
521 register unsigned long __a1 asm("$5") = (unsigned long) argv;
522 register unsigned long __a2 asm("$6") = (unsigned long) envp;
523 register unsigned long __a3 asm("$7");
524 unsigned long __v0;
525
526 __asm__ volatile (" \n"
527 " .set noreorder \n"
528 " li $2, %5 # __NR_execve \n"
529 " syscall \n"
530 " move %0, $2 \n"
531 " .set reorder \n"
532 : "=&r" (__v0), "=r" (__a3)
533 : "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
534 : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
535 "memory");
536
537 if (__a3 == 0)
538 return __v0;
539
540 return -__v0;
541}
542
