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8#include <linux/errno.h>
9#include <linux/types.h>
10#include <linux/sched.h>
11#include <linux/fs.h>
12#include <linux/file.h>
13#include <linux/mm.h>
14#include <linux/sem.h>
15#include <linux/msg.h>
16#include <linux/shm.h>
17#include <linux/stat.h>
18#include <linux/mman.h>
19#include <linux/utsname.h>
20#include <linux/smp.h>
21#include <linux/slab.h>
22#include <linux/syscalls.h>
23#include <linux/ipc.h>
24#include <linux/personality.h>
25#include <linux/random.h>
26#include <linux/export.h>
27
28#include <asm/uaccess.h>
29#include <asm/utrap.h>
30#include <asm/unistd.h>
31
32#include "entry.h"
33#include "systbls.h"
34
35
36
37asmlinkage unsigned long sys_getpagesize(void)
38{
39 return PAGE_SIZE;
40}
41
42#define VA_EXCLUDE_START (0x0000080000000000UL - (1UL << 32UL))
43#define VA_EXCLUDE_END (0xfffff80000000000UL + (1UL << 32UL))
44
45
46
47
48static inline int invalid_64bit_range(unsigned long addr, unsigned long len)
49{
50 unsigned long va_exclude_start, va_exclude_end;
51
52 va_exclude_start = VA_EXCLUDE_START;
53 va_exclude_end = VA_EXCLUDE_END;
54
55 if (unlikely(len >= va_exclude_start))
56 return 1;
57
58 if (unlikely((addr + len) < addr))
59 return 1;
60
61 if (unlikely((addr >= va_exclude_start && addr < va_exclude_end) ||
62 ((addr + len) >= va_exclude_start &&
63 (addr + len) < va_exclude_end)))
64 return 1;
65
66 return 0;
67}
68
69
70
71
72
73
74
75
76
77
78static inline unsigned long COLOR_ALIGN(unsigned long addr,
79 unsigned long pgoff)
80{
81 unsigned long base = (addr+SHMLBA-1)&~(SHMLBA-1);
82 unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1);
83
84 return base + off;
85}
86
87unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
88{
89 struct mm_struct *mm = current->mm;
90 struct vm_area_struct * vma;
91 unsigned long task_size = TASK_SIZE;
92 int do_color_align;
93 struct vm_unmapped_area_info info;
94
95 if (flags & MAP_FIXED) {
96
97
98
99 if ((flags & MAP_SHARED) &&
100 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
101 return -EINVAL;
102 return addr;
103 }
104
105 if (test_thread_flag(TIF_32BIT))
106 task_size = STACK_TOP32;
107 if (unlikely(len > task_size || len >= VA_EXCLUDE_START))
108 return -ENOMEM;
109
110 do_color_align = 0;
111 if (filp || (flags & MAP_SHARED))
112 do_color_align = 1;
113
114 if (addr) {
115 if (do_color_align)
116 addr = COLOR_ALIGN(addr, pgoff);
117 else
118 addr = PAGE_ALIGN(addr);
119
120 vma = find_vma(mm, addr);
121 if (task_size - len >= addr &&
122 (!vma || addr + len <= vma->vm_start))
123 return addr;
124 }
125
126 info.flags = 0;
127 info.length = len;
128 info.low_limit = TASK_UNMAPPED_BASE;
129 info.high_limit = min(task_size, VA_EXCLUDE_START);
130 info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
131 info.align_offset = pgoff << PAGE_SHIFT;
132 addr = vm_unmapped_area(&info);
133
134 if ((addr & ~PAGE_MASK) && task_size > VA_EXCLUDE_END) {
135 VM_BUG_ON(addr != -ENOMEM);
136 info.low_limit = VA_EXCLUDE_END;
137 info.high_limit = task_size;
138 addr = vm_unmapped_area(&info);
139 }
140
141 return addr;
142}
143
144unsigned long
145arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
146 const unsigned long len, const unsigned long pgoff,
147 const unsigned long flags)
148{
149 struct vm_area_struct *vma;
150 struct mm_struct *mm = current->mm;
151 unsigned long task_size = STACK_TOP32;
152 unsigned long addr = addr0;
153 int do_color_align;
154 struct vm_unmapped_area_info info;
155
156
157 BUG_ON(!test_thread_flag(TIF_32BIT));
158
159 if (flags & MAP_FIXED) {
160
161
162
163 if ((flags & MAP_SHARED) &&
164 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
165 return -EINVAL;
166 return addr;
167 }
168
169 if (unlikely(len > task_size))
170 return -ENOMEM;
171
172 do_color_align = 0;
173 if (filp || (flags & MAP_SHARED))
174 do_color_align = 1;
175
176
177 if (addr) {
178 if (do_color_align)
179 addr = COLOR_ALIGN(addr, pgoff);
180 else
181 addr = PAGE_ALIGN(addr);
182
183 vma = find_vma(mm, addr);
184 if (task_size - len >= addr &&
185 (!vma || addr + len <= vma->vm_start))
186 return addr;
187 }
188
189 info.flags = VM_UNMAPPED_AREA_TOPDOWN;
190 info.length = len;
191 info.low_limit = PAGE_SIZE;
192 info.high_limit = mm->mmap_base;
193 info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
194 info.align_offset = pgoff << PAGE_SHIFT;
195 addr = vm_unmapped_area(&info);
196
197
198
199
200
201
202
203 if (addr & ~PAGE_MASK) {
204 VM_BUG_ON(addr != -ENOMEM);
205 info.flags = 0;
206 info.low_limit = TASK_UNMAPPED_BASE;
207 info.high_limit = STACK_TOP32;
208 addr = vm_unmapped_area(&info);
209 }
210
211 return addr;
212}
213
214
215unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags)
216{
217 unsigned long align_goal, addr = -ENOMEM;
218 unsigned long (*get_area)(struct file *, unsigned long,
219 unsigned long, unsigned long, unsigned long);
220
221 get_area = current->mm->get_unmapped_area;
222
223 if (flags & MAP_FIXED) {
224
225 return get_area(NULL, orig_addr, len, pgoff, flags);
226 }
227 flags &= ~MAP_SHARED;
228
229 align_goal = PAGE_SIZE;
230 if (len >= (4UL * 1024 * 1024))
231 align_goal = (4UL * 1024 * 1024);
232 else if (len >= (512UL * 1024))
233 align_goal = (512UL * 1024);
234 else if (len >= (64UL * 1024))
235 align_goal = (64UL * 1024);
236
237 do {
238 addr = get_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags);
239 if (!(addr & ~PAGE_MASK)) {
240 addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL);
241 break;
242 }
243
244 if (align_goal == (4UL * 1024 * 1024))
245 align_goal = (512UL * 1024);
246 else if (align_goal == (512UL * 1024))
247 align_goal = (64UL * 1024);
248 else
249 align_goal = PAGE_SIZE;
250 } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE);
251
252
253
254
255 if (addr & ~PAGE_MASK)
256 addr = get_area(NULL, orig_addr, len, pgoff, flags);
257
258 return addr;
259}
260EXPORT_SYMBOL(get_fb_unmapped_area);
261
262
263static unsigned long mmap_rnd(void)
264{
265 unsigned long rnd = 0UL;
266
267 if (current->flags & PF_RANDOMIZE) {
268 unsigned long val = get_random_int();
269 if (test_thread_flag(TIF_32BIT))
270 rnd = (val % (1UL << (23UL-PAGE_SHIFT)));
271 else
272 rnd = (val % (1UL << (30UL-PAGE_SHIFT)));
273 }
274 return rnd << PAGE_SHIFT;
275}
276
277void arch_pick_mmap_layout(struct mm_struct *mm)
278{
279 unsigned long random_factor = mmap_rnd();
280 unsigned long gap;
281
282
283
284
285
286 gap = rlimit(RLIMIT_STACK);
287 if (!test_thread_flag(TIF_32BIT) ||
288 (current->personality & ADDR_COMPAT_LAYOUT) ||
289 gap == RLIM_INFINITY ||
290 sysctl_legacy_va_layout) {
291 mm->mmap_base = TASK_UNMAPPED_BASE + random_factor;
292 mm->get_unmapped_area = arch_get_unmapped_area;
293 } else {
294
295 unsigned long task_size = STACK_TOP32;
296
297 if (gap < 128 * 1024 * 1024)
298 gap = 128 * 1024 * 1024;
299 if (gap > (task_size / 6 * 5))
300 gap = (task_size / 6 * 5);
301
302 mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor);
303 mm->get_unmapped_area = arch_get_unmapped_area_topdown;
304 }
305}
306
307
308
309
310
311SYSCALL_DEFINE1(sparc_pipe_real, struct pt_regs *, regs)
312{
313 int fd[2];
314 int error;
315
316 error = do_pipe_flags(fd, 0);
317 if (error)
318 goto out;
319 regs->u_regs[UREG_I1] = fd[1];
320 error = fd[0];
321out:
322 return error;
323}
324
325
326
327
328
329
330
331SYSCALL_DEFINE6(sparc_ipc, unsigned int, call, int, first, unsigned long, second,
332 unsigned long, third, void __user *, ptr, long, fifth)
333{
334 long err;
335
336
337 if (call <= SEMCTL) {
338 switch (call) {
339 case SEMOP:
340 err = sys_semtimedop(first, ptr,
341 (unsigned)second, NULL);
342 goto out;
343 case SEMTIMEDOP:
344 err = sys_semtimedop(first, ptr, (unsigned)second,
345 (const struct timespec __user *)
346 (unsigned long) fifth);
347 goto out;
348 case SEMGET:
349 err = sys_semget(first, (int)second, (int)third);
350 goto out;
351 case SEMCTL: {
352 err = sys_semctl(first, second,
353 (int)third | IPC_64,
354 (unsigned long) ptr);
355 goto out;
356 }
357 default:
358 err = -ENOSYS;
359 goto out;
360 }
361 }
362 if (call <= MSGCTL) {
363 switch (call) {
364 case MSGSND:
365 err = sys_msgsnd(first, ptr, (size_t)second,
366 (int)third);
367 goto out;
368 case MSGRCV:
369 err = sys_msgrcv(first, ptr, (size_t)second, fifth,
370 (int)third);
371 goto out;
372 case MSGGET:
373 err = sys_msgget((key_t)first, (int)second);
374 goto out;
375 case MSGCTL:
376 err = sys_msgctl(first, (int)second | IPC_64, ptr);
377 goto out;
378 default:
379 err = -ENOSYS;
380 goto out;
381 }
382 }
383 if (call <= SHMCTL) {
384 switch (call) {
385 case SHMAT: {
386 ulong raddr;
387 err = do_shmat(first, ptr, (int)second, &raddr, SHMLBA);
388 if (!err) {
389 if (put_user(raddr,
390 (ulong __user *) third))
391 err = -EFAULT;
392 }
393 goto out;
394 }
395 case SHMDT:
396 err = sys_shmdt(ptr);
397 goto out;
398 case SHMGET:
399 err = sys_shmget(first, (size_t)second, (int)third);
400 goto out;
401 case SHMCTL:
402 err = sys_shmctl(first, (int)second | IPC_64, ptr);
403 goto out;
404 default:
405 err = -ENOSYS;
406 goto out;
407 }
408 } else {
409 err = -ENOSYS;
410 }
411out:
412 return err;
413}
414
415SYSCALL_DEFINE1(sparc64_personality, unsigned long, personality)
416{
417 int ret;
418
419 if (personality(current->personality) == PER_LINUX32 &&
420 personality(personality) == PER_LINUX)
421 personality |= PER_LINUX32;
422 ret = sys_personality(personality);
423 if (personality(ret) == PER_LINUX32)
424 ret &= ~PER_LINUX32;
425
426 return ret;
427}
428
429int sparc_mmap_check(unsigned long addr, unsigned long len)
430{
431 if (test_thread_flag(TIF_32BIT)) {
432 if (len >= STACK_TOP32)
433 return -EINVAL;
434
435 if (addr > STACK_TOP32 - len)
436 return -EINVAL;
437 } else {
438 if (len >= VA_EXCLUDE_START)
439 return -EINVAL;
440
441 if (invalid_64bit_range(addr, len))
442 return -EINVAL;
443 }
444
445 return 0;
446}
447
448
449SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
450 unsigned long, prot, unsigned long, flags, unsigned long, fd,
451 unsigned long, off)
452{
453 unsigned long retval = -EINVAL;
454
455 if ((off + PAGE_ALIGN(len)) < off)
456 goto out;
457 if (off & ~PAGE_MASK)
458 goto out;
459 retval = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
460out:
461 return retval;
462}
463
464SYSCALL_DEFINE2(64_munmap, unsigned long, addr, size_t, len)
465{
466 if (invalid_64bit_range(addr, len))
467 return -EINVAL;
468
469 return vm_munmap(addr, len);
470}
471
472SYSCALL_DEFINE5(64_mremap, unsigned long, addr, unsigned long, old_len,
473 unsigned long, new_len, unsigned long, flags,
474 unsigned long, new_addr)
475{
476 if (test_thread_flag(TIF_32BIT))
477 return -EINVAL;
478 return sys_mremap(addr, old_len, new_len, flags, new_addr);
479}
480
481
482asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs)
483{
484 static int count;
485
486
487 if (count++ > 5)
488 return -ENOSYS;
489
490 printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]);
491#ifdef DEBUG_UNIMP_SYSCALL
492 show_regs (regs);
493#endif
494
495 return -ENOSYS;
496}
497
498
499
500asmlinkage void sparc_breakpoint(struct pt_regs *regs)
501{
502 siginfo_t info;
503
504 if (test_thread_flag(TIF_32BIT)) {
505 regs->tpc &= 0xffffffff;
506 regs->tnpc &= 0xffffffff;
507 }
508#ifdef DEBUG_SPARC_BREAKPOINT
509 printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc);
510#endif
511 info.si_signo = SIGTRAP;
512 info.si_errno = 0;
513 info.si_code = TRAP_BRKPT;
514 info.si_addr = (void __user *)regs->tpc;
515 info.si_trapno = 0;
516 force_sig_info(SIGTRAP, &info, current);
517#ifdef DEBUG_SPARC_BREAKPOINT
518 printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc);
519#endif
520}
521
522extern void check_pending(int signum);
523
524SYSCALL_DEFINE2(getdomainname, char __user *, name, int, len)
525{
526 int nlen, err;
527
528 if (len < 0)
529 return -EINVAL;
530
531 down_read(&uts_sem);
532
533 nlen = strlen(utsname()->domainname) + 1;
534 err = -EINVAL;
535 if (nlen > len)
536 goto out;
537
538 err = -EFAULT;
539 if (!copy_to_user(name, utsname()->domainname, nlen))
540 err = 0;
541
542out:
543 up_read(&uts_sem);
544 return err;
545}
546
547SYSCALL_DEFINE5(utrap_install, utrap_entry_t, type,
548 utrap_handler_t, new_p, utrap_handler_t, new_d,
549 utrap_handler_t __user *, old_p,
550 utrap_handler_t __user *, old_d)
551{
552 if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31)
553 return -EINVAL;
554 if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) {
555 if (old_p) {
556 if (!current_thread_info()->utraps) {
557 if (put_user(NULL, old_p))
558 return -EFAULT;
559 } else {
560 if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
561 return -EFAULT;
562 }
563 }
564 if (old_d) {
565 if (put_user(NULL, old_d))
566 return -EFAULT;
567 }
568 return 0;
569 }
570 if (!current_thread_info()->utraps) {
571 current_thread_info()->utraps =
572 kzalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL);
573 if (!current_thread_info()->utraps)
574 return -ENOMEM;
575 current_thread_info()->utraps[0] = 1;
576 } else {
577 if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p &&
578 current_thread_info()->utraps[0] > 1) {
579 unsigned long *p = current_thread_info()->utraps;
580
581 current_thread_info()->utraps =
582 kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long),
583 GFP_KERNEL);
584 if (!current_thread_info()->utraps) {
585 current_thread_info()->utraps = p;
586 return -ENOMEM;
587 }
588 p[0]--;
589 current_thread_info()->utraps[0] = 1;
590 memcpy(current_thread_info()->utraps+1, p+1,
591 UT_TRAP_INSTRUCTION_31*sizeof(long));
592 }
593 }
594 if (old_p) {
595 if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
596 return -EFAULT;
597 }
598 if (old_d) {
599 if (put_user(NULL, old_d))
600 return -EFAULT;
601 }
602 current_thread_info()->utraps[type] = (long)new_p;
603
604 return 0;
605}
606
607asmlinkage long sparc_memory_ordering(unsigned long model,
608 struct pt_regs *regs)
609{
610 if (model >= 3)
611 return -EINVAL;
612 regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14);
613 return 0;
614}
615
616SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
617 struct sigaction __user *, oact, void __user *, restorer,
618 size_t, sigsetsize)
619{
620 struct k_sigaction new_ka, old_ka;
621 int ret;
622
623
624 if (sigsetsize != sizeof(sigset_t))
625 return -EINVAL;
626
627 if (act) {
628 new_ka.ka_restorer = restorer;
629 if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
630 return -EFAULT;
631 }
632
633 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
634
635 if (!ret && oact) {
636 if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
637 return -EFAULT;
638 }
639
640 return ret;
641}
642
643asmlinkage long sys_kern_features(void)
644{
645 return KERN_FEATURE_MIXED_MODE_STACK;
646}
647
