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1/* linux/arch/sparc64/kernel/sys_sparc.c
2 *
3 * This file contains various random system calls that
4 * have a non-standard calling sequence on the Linux/sparc
5 * platform.
6 */
7
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#include <linux/context_tracking.h>
28
29#include <linux/uaccess.h>
30#include <asm/utrap.h>
31#include <asm/unistd.h>
32
33#include "entry.h"
34#include "kernel.h"
35#include "systbls.h"
36
37/* #define DEBUG_UNIMP_SYSCALL */
38
39asmlinkage unsigned long sys_getpagesize(void)
40{
41 return PAGE_SIZE;
42}
43
44/* Does addr --> addr+len fall within 4GB of the VA-space hole or
45 * overflow past the end of the 64-bit address space?
46 */
47static inline int invalid_64bit_range(unsigned long addr, unsigned long len)
48{
49 unsigned long va_exclude_start, va_exclude_end;
50
51 va_exclude_start = VA_EXCLUDE_START;
52 va_exclude_end = VA_EXCLUDE_END;
53
54 if (unlikely(len >= va_exclude_start))
55 return 1;
56
57 if (unlikely((addr + len) < addr))
58 return 1;
59
60 if (unlikely((addr >= va_exclude_start && addr < va_exclude_end) ||
61 ((addr + len) >= va_exclude_start &&
62 (addr + len) < va_exclude_end)))
63 return 1;
64
65 return 0;
66}
67
68/* These functions differ from the default implementations in
69 * mm/mmap.c in two ways:
70 *
71 * 1) For file backed MAP_SHARED mmap()'s we D-cache color align,
72 * for fixed such mappings we just validate what the user gave us.
73 * 2) For 64-bit tasks we avoid mapping anything within 4GB of
74 * the spitfire/niagara VA-hole.
75 */
76
77static inline unsigned long COLOR_ALIGN(unsigned long addr,
78 unsigned long pgoff)
79{
80 unsigned long base = (addr+SHMLBA-1)&~(SHMLBA-1);
81 unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1);
82
83 return base + off;
84}
85
86unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
87{
88 struct mm_struct *mm = current->mm;
89 struct vm_area_struct * vma;
90 unsigned long task_size = TASK_SIZE;
91 int do_color_align;
92 struct vm_unmapped_area_info info;
93
94 if (flags & MAP_FIXED) {
95 /* We do not accept a shared mapping if it would violate
96 * cache aliasing constraints.
97 */
98 if ((flags & MAP_SHARED) &&
99 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
100 return -EINVAL;
101 return addr;
102 }
103
104 if (test_thread_flag(TIF_32BIT))
105 task_size = STACK_TOP32;
106 if (unlikely(len > task_size || len >= VA_EXCLUDE_START))
107 return -ENOMEM;
108
109 do_color_align = 0;
110 if (filp || (flags & MAP_SHARED))
111 do_color_align = 1;
112
113 if (addr) {
114 if (do_color_align)
115 addr = COLOR_ALIGN(addr, pgoff);
116 else
117 addr = PAGE_ALIGN(addr);
118
119 vma = find_vma(mm, addr);
120 if (task_size - len >= addr &&
121 (!vma || addr + len <= vma->vm_start))
122 return addr;
123 }
124
125 info.flags = 0;
126 info.length = len;
127 info.low_limit = TASK_UNMAPPED_BASE;
128 info.high_limit = min(task_size, VA_EXCLUDE_START);
129 info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
130 info.align_offset = pgoff << PAGE_SHIFT;
131 addr = vm_unmapped_area(&info);
132
133 if ((addr & ~PAGE_MASK) && task_size > VA_EXCLUDE_END) {
134 VM_BUG_ON(addr != -ENOMEM);
135 info.low_limit = VA_EXCLUDE_END;
136 info.high_limit = task_size;
137 addr = vm_unmapped_area(&info);
138 }
139
140 return addr;
141}
142
143unsigned long
144arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
145 const unsigned long len, const unsigned long pgoff,
146 const unsigned long flags)
147{
148 struct vm_area_struct *vma;
149 struct mm_struct *mm = current->mm;
150 unsigned long task_size = STACK_TOP32;
151 unsigned long addr = addr0;
152 int do_color_align;
153 struct vm_unmapped_area_info info;
154
155 /* This should only ever run for 32-bit processes. */
156 BUG_ON(!test_thread_flag(TIF_32BIT));
157
158 if (flags & MAP_FIXED) {
159 /* We do not accept a shared mapping if it would violate
160 * cache aliasing constraints.
161 */
162 if ((flags & MAP_SHARED) &&
163 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
164 return -EINVAL;
165 return addr;
166 }
167
168 if (unlikely(len > task_size))
169 return -ENOMEM;
170
171 do_color_align = 0;
172 if (filp || (flags & MAP_SHARED))
173 do_color_align = 1;
174
175 /* requesting a specific address */
176 if (addr) {
177 if (do_color_align)
178 addr = COLOR_ALIGN(addr, pgoff);
179 else
180 addr = PAGE_ALIGN(addr);
181
182 vma = find_vma(mm, addr);
183 if (task_size - len >= addr &&
184 (!vma || addr + len <= vma->vm_start))
185 return addr;
186 }
187
188 info.flags = VM_UNMAPPED_AREA_TOPDOWN;
189 info.length = len;
190 info.low_limit = PAGE_SIZE;
191 info.high_limit = mm->mmap_base;
192 info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
193 info.align_offset = pgoff << PAGE_SHIFT;
194 addr = vm_unmapped_area(&info);
195
196 /*
197 * A failed mmap() very likely causes application failure,
198 * so fall back to the bottom-up function here. This scenario
199 * can happen with large stack limits and large mmap()
200 * allocations.
201 */
202 if (addr & ~PAGE_MASK) {
203 VM_BUG_ON(addr != -ENOMEM);
204 info.flags = 0;
205 info.low_limit = TASK_UNMAPPED_BASE;
206 info.high_limit = STACK_TOP32;
207 addr = vm_unmapped_area(&info);
208 }
209
210 return addr;
211}
212
213/* Try to align mapping such that we align it as much as possible. */
214unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags)
215{
216 unsigned long align_goal, addr = -ENOMEM;
217 unsigned long (*get_area)(struct file *, unsigned long,
218 unsigned long, unsigned long, unsigned long);
219
220 get_area = current->mm->get_unmapped_area;
221
222 if (flags & MAP_FIXED) {
223 /* Ok, don't mess with it. */
224 return get_area(NULL, orig_addr, len, pgoff, flags);
225 }
226 flags &= ~MAP_SHARED;
227
228 align_goal = PAGE_SIZE;
229 if (len >= (4UL * 1024 * 1024))
230 align_goal = (4UL * 1024 * 1024);
231 else if (len >= (512UL * 1024))
232 align_goal = (512UL * 1024);
233 else if (len >= (64UL * 1024))
234 align_goal = (64UL * 1024);
235
236 do {
237 addr = get_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags);
238 if (!(addr & ~PAGE_MASK)) {
239 addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL);
240 break;
241 }
242
243 if (align_goal == (4UL * 1024 * 1024))
244 align_goal = (512UL * 1024);
245 else if (align_goal == (512UL * 1024))
246 align_goal = (64UL * 1024);
247 else
248 align_goal = PAGE_SIZE;
249 } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE);
250
251 /* Mapping is smaller than 64K or larger areas could not
252 * be obtained.
253 */
254 if (addr & ~PAGE_MASK)
255 addr = get_area(NULL, orig_addr, len, pgoff, flags);
256
257 return addr;
258}
259EXPORT_SYMBOL(get_fb_unmapped_area);
260
261/* Essentially the same as PowerPC. */
262static unsigned long mmap_rnd(void)
263{
264 unsigned long rnd = 0UL;
265
266 if (current->flags & PF_RANDOMIZE) {
267 unsigned long val = get_random_long();
268 if (test_thread_flag(TIF_32BIT))
269 rnd = (val % (1UL << (23UL-PAGE_SHIFT)));
270 else
271 rnd = (val % (1UL << (30UL-PAGE_SHIFT)));
272 }
273 return rnd << PAGE_SHIFT;
274}
275
276void arch_pick_mmap_layout(struct mm_struct *mm)
277{
278 unsigned long random_factor = mmap_rnd();
279 unsigned long gap;
280
281 /*
282 * Fall back to the standard layout if the personality
283 * bit is set, or if the expected stack growth is unlimited:
284 */
285 gap = rlimit(RLIMIT_STACK);
286 if (!test_thread_flag(TIF_32BIT) ||
287 (current->personality & ADDR_COMPAT_LAYOUT) ||
288 gap == RLIM_INFINITY ||
289 sysctl_legacy_va_layout) {
290 mm->mmap_base = TASK_UNMAPPED_BASE + random_factor;
291 mm->get_unmapped_area = arch_get_unmapped_area;
292 } else {
293 /* We know it's 32-bit */
294 unsigned long task_size = STACK_TOP32;
295
296 if (gap < 128 * 1024 * 1024)
297 gap = 128 * 1024 * 1024;
298 if (gap > (task_size / 6 * 5))
299 gap = (task_size / 6 * 5);
300
301 mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor);
302 mm->get_unmapped_area = arch_get_unmapped_area_topdown;
303 }
304}
305
306/*
307 * sys_pipe() is the normal C calling standard for creating
308 * a pipe. It's not the way unix traditionally does this, though.
309 */
310SYSCALL_DEFINE1(sparc_pipe_real, struct pt_regs *, regs)
311{
312 int fd[2];
313 int error;
314
315 error = do_pipe_flags(fd, 0);
316 if (error)
317 goto out;
318 regs->u_regs[UREG_I1] = fd[1];
319 error = fd[0];
320out:
321 return error;
322}
323
324/*
325 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
326 *
327 * This is really horribly ugly.
328 */
329
330SYSCALL_DEFINE6(sparc_ipc, unsigned int, call, int, first, unsigned long, second,
331 unsigned long, third, void __user *, ptr, long, fifth)
332{
333 long err;
334
335 /* No need for backward compatibility. We can start fresh... */
336 if (call <= SEMTIMEDOP) {
337 switch (call) {
338 case SEMOP:
339 err = sys_semtimedop(first, ptr,
340 (unsigned int)second, NULL);
341 goto out;
342 case SEMTIMEDOP:
343 err = sys_semtimedop(first, ptr, (unsigned int)second,
344 (const struct timespec __user *)
345 (unsigned long) fifth);
346 goto out;
347 case SEMGET:
348 err = sys_semget(first, (int)second, (int)third);
349 goto out;
350 case SEMCTL: {
351 err = sys_semctl(first, second,
352 (int)third | IPC_64,
353 (unsigned long) ptr);
354 goto out;
355 }
356 default:
357 err = -ENOSYS;
358 goto out;
359 }
360 }
361 if (call <= MSGCTL) {
362 switch (call) {
363 case MSGSND:
364 err = sys_msgsnd(first, ptr, (size_t)second,
365 (int)third);
366 goto out;
367 case MSGRCV:
368 err = sys_msgrcv(first, ptr, (size_t)second, fifth,
369 (int)third);
370 goto out;
371 case MSGGET:
372 err = sys_msgget((key_t)first, (int)second);
373 goto out;
374 case MSGCTL:
375 err = sys_msgctl(first, (int)second | IPC_64, ptr);
376 goto out;
377 default:
378 err = -ENOSYS;
379 goto out;
380 }
381 }
382 if (call <= SHMCTL) {
383 switch (call) {
384 case SHMAT: {
385 ulong raddr;
386 err = do_shmat(first, ptr, (int)second, &raddr, SHMLBA);
387 if (!err) {
388 if (put_user(raddr,
389 (ulong __user *) third))
390 err = -EFAULT;
391 }
392 goto out;
393 }
394 case SHMDT:
395 err = sys_shmdt(ptr);
396 goto out;
397 case SHMGET:
398 err = sys_shmget(first, (size_t)second, (int)third);
399 goto out;
400 case SHMCTL:
401 err = sys_shmctl(first, (int)second | IPC_64, ptr);
402 goto out;
403 default:
404 err = -ENOSYS;
405 goto out;
406 }
407 } else {
408 err = -ENOSYS;
409 }
410out:
411 return err;
412}
413
414SYSCALL_DEFINE1(sparc64_personality, unsigned long, personality)
415{
416 long ret;
417
418 if (personality(current->personality) == PER_LINUX32 &&
419 personality(personality) == PER_LINUX)
420 personality |= PER_LINUX32;
421 ret = sys_personality(personality);
422 if (personality(ret) == PER_LINUX32)
423 ret &= ~PER_LINUX32;
424
425 return ret;
426}
427
428int sparc_mmap_check(unsigned long addr, unsigned long len)
429{
430 if (test_thread_flag(TIF_32BIT)) {
431 if (len >= STACK_TOP32)
432 return -EINVAL;
433
434 if (addr > STACK_TOP32 - len)
435 return -EINVAL;
436 } else {
437 if (len >= VA_EXCLUDE_START)
438 return -EINVAL;
439
440 if (invalid_64bit_range(addr, len))
441 return -EINVAL;
442 }
443
444 return 0;
445}
446
447/* Linux version of mmap */
448SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
449 unsigned long, prot, unsigned long, flags, unsigned long, fd,
450 unsigned long, off)
451{
452 unsigned long retval = -EINVAL;
453
454 if ((off + PAGE_ALIGN(len)) < off)
455 goto out;
456 if (off & ~PAGE_MASK)
457 goto out;
458 retval = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
459out:
460 return retval;
461}
462
463SYSCALL_DEFINE2(64_munmap, unsigned long, addr, size_t, len)
464{
465 if (invalid_64bit_range(addr, len))
466 return -EINVAL;
467
468 return vm_munmap(addr, len);
469}
470
471SYSCALL_DEFINE5(64_mremap, unsigned long, addr, unsigned long, old_len,
472 unsigned long, new_len, unsigned long, flags,
473 unsigned long, new_addr)
474{
475 if (test_thread_flag(TIF_32BIT))
476 return -EINVAL;
477 return sys_mremap(addr, old_len, new_len, flags, new_addr);
478}
479
480/* we come to here via sys_nis_syscall so it can setup the regs argument */
481asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs)
482{
483 static int count;
484
485 /* Don't make the system unusable, if someone goes stuck */
486 if (count++ > 5)
487 return -ENOSYS;
488
489 printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]);
490#ifdef DEBUG_UNIMP_SYSCALL
491 show_regs (regs);
492#endif
493
494 return -ENOSYS;
495}
496
497/* #define DEBUG_SPARC_BREAKPOINT */
498
499asmlinkage void sparc_breakpoint(struct pt_regs *regs)
500{
501 enum ctx_state prev_state = exception_enter();
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 exception_exit(prev_state);
521}
522
523extern void check_pending(int signum);
524
525SYSCALL_DEFINE2(getdomainname, char __user *, name, int, len)
526{
527 int nlen, err;
528
529 if (len < 0)
530 return -EINVAL;
531
532 down_read(&uts_sem);
533
534 nlen = strlen(utsname()->domainname) + 1;
535 err = -EINVAL;
536 if (nlen > len)
537 goto out;
538
539 err = -EFAULT;
540 if (!copy_to_user(name, utsname()->domainname, nlen))
541 err = 0;
542
543out:
544 up_read(&uts_sem);
545 return err;
546}
547
548SYSCALL_DEFINE5(utrap_install, utrap_entry_t, type,
549 utrap_handler_t, new_p, utrap_handler_t, new_d,
550 utrap_handler_t __user *, old_p,
551 utrap_handler_t __user *, old_d)
552{
553 if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31)
554 return -EINVAL;
555 if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) {
556 if (old_p) {
557 if (!current_thread_info()->utraps) {
558 if (put_user(NULL, old_p))
559 return -EFAULT;
560 } else {
561 if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
562 return -EFAULT;
563 }
564 }
565 if (old_d) {
566 if (put_user(NULL, old_d))
567 return -EFAULT;
568 }
569 return 0;
570 }
571 if (!current_thread_info()->utraps) {
572 current_thread_info()->utraps =
573 kzalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL);
574 if (!current_thread_info()->utraps)
575 return -ENOMEM;
576 current_thread_info()->utraps[0] = 1;
577 } else {
578 if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p &&
579 current_thread_info()->utraps[0] > 1) {
580 unsigned long *p = current_thread_info()->utraps;
581
582 current_thread_info()->utraps =
583 kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long),
584 GFP_KERNEL);
585 if (!current_thread_info()->utraps) {
586 current_thread_info()->utraps = p;
587 return -ENOMEM;
588 }
589 p[0]--;
590 current_thread_info()->utraps[0] = 1;
591 memcpy(current_thread_info()->utraps+1, p+1,
592 UT_TRAP_INSTRUCTION_31*sizeof(long));
593 }
594 }
595 if (old_p) {
596 if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
597 return -EFAULT;
598 }
599 if (old_d) {
600 if (put_user(NULL, old_d))
601 return -EFAULT;
602 }
603 current_thread_info()->utraps[type] = (long)new_p;
604
605 return 0;
606}
607
608asmlinkage long sparc_memory_ordering(unsigned long model,
609 struct pt_regs *regs)
610{
611 if (model >= 3)
612 return -EINVAL;
613 regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14);
614 return 0;
615}
616
617SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
618 struct sigaction __user *, oact, void __user *, restorer,
619 size_t, sigsetsize)
620{
621 struct k_sigaction new_ka, old_ka;
622 int ret;
623
624 /* XXX: Don't preclude handling different sized sigset_t's. */
625 if (sigsetsize != sizeof(sigset_t))
626 return -EINVAL;
627
628 if (act) {
629 new_ka.ka_restorer = restorer;
630 if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
631 return -EFAULT;
632 }
633
634 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
635
636 if (!ret && oact) {
637 if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
638 return -EFAULT;
639 }
640
641 return ret;
642}
643
644asmlinkage long sys_kern_features(void)
645{
646 return KERN_FEATURE_MIXED_MODE_STACK;
647}
1/* linux/arch/sparc64/kernel/sys_sparc.c
2 *
3 * This file contains various random system calls that
4 * have a non-standard calling sequence on the Linux/sparc
5 * platform.
6 */
7
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#include <linux/context_tracking.h>
28
29#include <asm/uaccess.h>
30#include <asm/utrap.h>
31#include <asm/unistd.h>
32
33#include "entry.h"
34#include "systbls.h"
35
36/* #define DEBUG_UNIMP_SYSCALL */
37
38asmlinkage unsigned long sys_getpagesize(void)
39{
40 return PAGE_SIZE;
41}
42
43/* Does addr --> addr+len fall within 4GB of the VA-space hole or
44 * overflow past the end of the 64-bit address space?
45 */
46static inline int invalid_64bit_range(unsigned long addr, unsigned long len)
47{
48 unsigned long va_exclude_start, va_exclude_end;
49
50 va_exclude_start = VA_EXCLUDE_START;
51 va_exclude_end = VA_EXCLUDE_END;
52
53 if (unlikely(len >= va_exclude_start))
54 return 1;
55
56 if (unlikely((addr + len) < addr))
57 return 1;
58
59 if (unlikely((addr >= va_exclude_start && addr < va_exclude_end) ||
60 ((addr + len) >= va_exclude_start &&
61 (addr + len) < va_exclude_end)))
62 return 1;
63
64 return 0;
65}
66
67/* These functions differ from the default implementations in
68 * mm/mmap.c in two ways:
69 *
70 * 1) For file backed MAP_SHARED mmap()'s we D-cache color align,
71 * for fixed such mappings we just validate what the user gave us.
72 * 2) For 64-bit tasks we avoid mapping anything within 4GB of
73 * the spitfire/niagara VA-hole.
74 */
75
76static inline unsigned long COLOR_ALIGN(unsigned long addr,
77 unsigned long pgoff)
78{
79 unsigned long base = (addr+SHMLBA-1)&~(SHMLBA-1);
80 unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1);
81
82 return base + off;
83}
84
85unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags)
86{
87 struct mm_struct *mm = current->mm;
88 struct vm_area_struct * vma;
89 unsigned long task_size = TASK_SIZE;
90 int do_color_align;
91 struct vm_unmapped_area_info info;
92
93 if (flags & MAP_FIXED) {
94 /* We do not accept a shared mapping if it would violate
95 * cache aliasing constraints.
96 */
97 if ((flags & MAP_SHARED) &&
98 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
99 return -EINVAL;
100 return addr;
101 }
102
103 if (test_thread_flag(TIF_32BIT))
104 task_size = STACK_TOP32;
105 if (unlikely(len > task_size || len >= VA_EXCLUDE_START))
106 return -ENOMEM;
107
108 do_color_align = 0;
109 if (filp || (flags & MAP_SHARED))
110 do_color_align = 1;
111
112 if (addr) {
113 if (do_color_align)
114 addr = COLOR_ALIGN(addr, pgoff);
115 else
116 addr = PAGE_ALIGN(addr);
117
118 vma = find_vma(mm, addr);
119 if (task_size - len >= addr &&
120 (!vma || addr + len <= vma->vm_start))
121 return addr;
122 }
123
124 info.flags = 0;
125 info.length = len;
126 info.low_limit = TASK_UNMAPPED_BASE;
127 info.high_limit = min(task_size, VA_EXCLUDE_START);
128 info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
129 info.align_offset = pgoff << PAGE_SHIFT;
130 addr = vm_unmapped_area(&info);
131
132 if ((addr & ~PAGE_MASK) && task_size > VA_EXCLUDE_END) {
133 VM_BUG_ON(addr != -ENOMEM);
134 info.low_limit = VA_EXCLUDE_END;
135 info.high_limit = task_size;
136 addr = vm_unmapped_area(&info);
137 }
138
139 return addr;
140}
141
142unsigned long
143arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
144 const unsigned long len, const unsigned long pgoff,
145 const unsigned long flags)
146{
147 struct vm_area_struct *vma;
148 struct mm_struct *mm = current->mm;
149 unsigned long task_size = STACK_TOP32;
150 unsigned long addr = addr0;
151 int do_color_align;
152 struct vm_unmapped_area_info info;
153
154 /* This should only ever run for 32-bit processes. */
155 BUG_ON(!test_thread_flag(TIF_32BIT));
156
157 if (flags & MAP_FIXED) {
158 /* We do not accept a shared mapping if it would violate
159 * cache aliasing constraints.
160 */
161 if ((flags & MAP_SHARED) &&
162 ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
163 return -EINVAL;
164 return addr;
165 }
166
167 if (unlikely(len > task_size))
168 return -ENOMEM;
169
170 do_color_align = 0;
171 if (filp || (flags & MAP_SHARED))
172 do_color_align = 1;
173
174 /* requesting a specific address */
175 if (addr) {
176 if (do_color_align)
177 addr = COLOR_ALIGN(addr, pgoff);
178 else
179 addr = PAGE_ALIGN(addr);
180
181 vma = find_vma(mm, addr);
182 if (task_size - len >= addr &&
183 (!vma || addr + len <= vma->vm_start))
184 return addr;
185 }
186
187 info.flags = VM_UNMAPPED_AREA_TOPDOWN;
188 info.length = len;
189 info.low_limit = PAGE_SIZE;
190 info.high_limit = mm->mmap_base;
191 info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
192 info.align_offset = pgoff << PAGE_SHIFT;
193 addr = vm_unmapped_area(&info);
194
195 /*
196 * A failed mmap() very likely causes application failure,
197 * so fall back to the bottom-up function here. This scenario
198 * can happen with large stack limits and large mmap()
199 * allocations.
200 */
201 if (addr & ~PAGE_MASK) {
202 VM_BUG_ON(addr != -ENOMEM);
203 info.flags = 0;
204 info.low_limit = TASK_UNMAPPED_BASE;
205 info.high_limit = STACK_TOP32;
206 addr = vm_unmapped_area(&info);
207 }
208
209 return addr;
210}
211
212/* Try to align mapping such that we align it as much as possible. */
213unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags)
214{
215 unsigned long align_goal, addr = -ENOMEM;
216 unsigned long (*get_area)(struct file *, unsigned long,
217 unsigned long, unsigned long, unsigned long);
218
219 get_area = current->mm->get_unmapped_area;
220
221 if (flags & MAP_FIXED) {
222 /* Ok, don't mess with it. */
223 return get_area(NULL, orig_addr, len, pgoff, flags);
224 }
225 flags &= ~MAP_SHARED;
226
227 align_goal = PAGE_SIZE;
228 if (len >= (4UL * 1024 * 1024))
229 align_goal = (4UL * 1024 * 1024);
230 else if (len >= (512UL * 1024))
231 align_goal = (512UL * 1024);
232 else if (len >= (64UL * 1024))
233 align_goal = (64UL * 1024);
234
235 do {
236 addr = get_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags);
237 if (!(addr & ~PAGE_MASK)) {
238 addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL);
239 break;
240 }
241
242 if (align_goal == (4UL * 1024 * 1024))
243 align_goal = (512UL * 1024);
244 else if (align_goal == (512UL * 1024))
245 align_goal = (64UL * 1024);
246 else
247 align_goal = PAGE_SIZE;
248 } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE);
249
250 /* Mapping is smaller than 64K or larger areas could not
251 * be obtained.
252 */
253 if (addr & ~PAGE_MASK)
254 addr = get_area(NULL, orig_addr, len, pgoff, flags);
255
256 return addr;
257}
258EXPORT_SYMBOL(get_fb_unmapped_area);
259
260/* Essentially the same as PowerPC. */
261static unsigned long mmap_rnd(void)
262{
263 unsigned long rnd = 0UL;
264
265 if (current->flags & PF_RANDOMIZE) {
266 unsigned long val = get_random_int();
267 if (test_thread_flag(TIF_32BIT))
268 rnd = (val % (1UL << (23UL-PAGE_SHIFT)));
269 else
270 rnd = (val % (1UL << (30UL-PAGE_SHIFT)));
271 }
272 return rnd << PAGE_SHIFT;
273}
274
275void arch_pick_mmap_layout(struct mm_struct *mm)
276{
277 unsigned long random_factor = mmap_rnd();
278 unsigned long gap;
279
280 /*
281 * Fall back to the standard layout if the personality
282 * bit is set, or if the expected stack growth is unlimited:
283 */
284 gap = rlimit(RLIMIT_STACK);
285 if (!test_thread_flag(TIF_32BIT) ||
286 (current->personality & ADDR_COMPAT_LAYOUT) ||
287 gap == RLIM_INFINITY ||
288 sysctl_legacy_va_layout) {
289 mm->mmap_base = TASK_UNMAPPED_BASE + random_factor;
290 mm->get_unmapped_area = arch_get_unmapped_area;
291 } else {
292 /* We know it's 32-bit */
293 unsigned long task_size = STACK_TOP32;
294
295 if (gap < 128 * 1024 * 1024)
296 gap = 128 * 1024 * 1024;
297 if (gap > (task_size / 6 * 5))
298 gap = (task_size / 6 * 5);
299
300 mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor);
301 mm->get_unmapped_area = arch_get_unmapped_area_topdown;
302 }
303}
304
305/*
306 * sys_pipe() is the normal C calling standard for creating
307 * a pipe. It's not the way unix traditionally does this, though.
308 */
309SYSCALL_DEFINE1(sparc_pipe_real, struct pt_regs *, regs)
310{
311 int fd[2];
312 int error;
313
314 error = do_pipe_flags(fd, 0);
315 if (error)
316 goto out;
317 regs->u_regs[UREG_I1] = fd[1];
318 error = fd[0];
319out:
320 return error;
321}
322
323/*
324 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
325 *
326 * This is really horribly ugly.
327 */
328
329SYSCALL_DEFINE6(sparc_ipc, unsigned int, call, int, first, unsigned long, second,
330 unsigned long, third, void __user *, ptr, long, fifth)
331{
332 long err;
333
334 /* No need for backward compatibility. We can start fresh... */
335 if (call <= SEMCTL) {
336 switch (call) {
337 case SEMOP:
338 err = sys_semtimedop(first, ptr,
339 (unsigned)second, NULL);
340 goto out;
341 case SEMTIMEDOP:
342 err = sys_semtimedop(first, ptr, (unsigned)second,
343 (const struct timespec __user *)
344 (unsigned long) fifth);
345 goto out;
346 case SEMGET:
347 err = sys_semget(first, (int)second, (int)third);
348 goto out;
349 case SEMCTL: {
350 err = sys_semctl(first, second,
351 (int)third | IPC_64,
352 (unsigned long) ptr);
353 goto out;
354 }
355 default:
356 err = -ENOSYS;
357 goto out;
358 }
359 }
360 if (call <= MSGCTL) {
361 switch (call) {
362 case MSGSND:
363 err = sys_msgsnd(first, ptr, (size_t)second,
364 (int)third);
365 goto out;
366 case MSGRCV:
367 err = sys_msgrcv(first, ptr, (size_t)second, fifth,
368 (int)third);
369 goto out;
370 case MSGGET:
371 err = sys_msgget((key_t)first, (int)second);
372 goto out;
373 case MSGCTL:
374 err = sys_msgctl(first, (int)second | IPC_64, ptr);
375 goto out;
376 default:
377 err = -ENOSYS;
378 goto out;
379 }
380 }
381 if (call <= SHMCTL) {
382 switch (call) {
383 case SHMAT: {
384 ulong raddr;
385 err = do_shmat(first, ptr, (int)second, &raddr, SHMLBA);
386 if (!err) {
387 if (put_user(raddr,
388 (ulong __user *) third))
389 err = -EFAULT;
390 }
391 goto out;
392 }
393 case SHMDT:
394 err = sys_shmdt(ptr);
395 goto out;
396 case SHMGET:
397 err = sys_shmget(first, (size_t)second, (int)third);
398 goto out;
399 case SHMCTL:
400 err = sys_shmctl(first, (int)second | IPC_64, ptr);
401 goto out;
402 default:
403 err = -ENOSYS;
404 goto out;
405 }
406 } else {
407 err = -ENOSYS;
408 }
409out:
410 return err;
411}
412
413SYSCALL_DEFINE1(sparc64_personality, unsigned long, personality)
414{
415 int ret;
416
417 if (personality(current->personality) == PER_LINUX32 &&
418 personality(personality) == PER_LINUX)
419 personality |= PER_LINUX32;
420 ret = sys_personality(personality);
421 if (personality(ret) == PER_LINUX32)
422 ret &= ~PER_LINUX32;
423
424 return ret;
425}
426
427int sparc_mmap_check(unsigned long addr, unsigned long len)
428{
429 if (test_thread_flag(TIF_32BIT)) {
430 if (len >= STACK_TOP32)
431 return -EINVAL;
432
433 if (addr > STACK_TOP32 - len)
434 return -EINVAL;
435 } else {
436 if (len >= VA_EXCLUDE_START)
437 return -EINVAL;
438
439 if (invalid_64bit_range(addr, len))
440 return -EINVAL;
441 }
442
443 return 0;
444}
445
446/* Linux version of mmap */
447SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
448 unsigned long, prot, unsigned long, flags, unsigned long, fd,
449 unsigned long, off)
450{
451 unsigned long retval = -EINVAL;
452
453 if ((off + PAGE_ALIGN(len)) < off)
454 goto out;
455 if (off & ~PAGE_MASK)
456 goto out;
457 retval = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
458out:
459 return retval;
460}
461
462SYSCALL_DEFINE2(64_munmap, unsigned long, addr, size_t, len)
463{
464 if (invalid_64bit_range(addr, len))
465 return -EINVAL;
466
467 return vm_munmap(addr, len);
468}
469
470SYSCALL_DEFINE5(64_mremap, unsigned long, addr, unsigned long, old_len,
471 unsigned long, new_len, unsigned long, flags,
472 unsigned long, new_addr)
473{
474 if (test_thread_flag(TIF_32BIT))
475 return -EINVAL;
476 return sys_mremap(addr, old_len, new_len, flags, new_addr);
477}
478
479/* we come to here via sys_nis_syscall so it can setup the regs argument */
480asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs)
481{
482 static int count;
483
484 /* Don't make the system unusable, if someone goes stuck */
485 if (count++ > 5)
486 return -ENOSYS;
487
488 printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]);
489#ifdef DEBUG_UNIMP_SYSCALL
490 show_regs (regs);
491#endif
492
493 return -ENOSYS;
494}
495
496/* #define DEBUG_SPARC_BREAKPOINT */
497
498asmlinkage void sparc_breakpoint(struct pt_regs *regs)
499{
500 enum ctx_state prev_state = exception_enter();
501 siginfo_t info;
502
503 if (test_thread_flag(TIF_32BIT)) {
504 regs->tpc &= 0xffffffff;
505 regs->tnpc &= 0xffffffff;
506 }
507#ifdef DEBUG_SPARC_BREAKPOINT
508 printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc);
509#endif
510 info.si_signo = SIGTRAP;
511 info.si_errno = 0;
512 info.si_code = TRAP_BRKPT;
513 info.si_addr = (void __user *)regs->tpc;
514 info.si_trapno = 0;
515 force_sig_info(SIGTRAP, &info, current);
516#ifdef DEBUG_SPARC_BREAKPOINT
517 printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc);
518#endif
519 exception_exit(prev_state);
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 /* XXX: Don't preclude handling different sized sigset_t's. */
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}