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1da177e4 LT |
1 | /* $Id: sys_sparc.c,v 1.57 2002/02/09 19:49:30 davem Exp $ |
2 | * linux/arch/sparc64/kernel/sys_sparc.c | |
3 | * | |
4 | * This file contains various random system calls that | |
5 | * have a non-standard calling sequence on the Linux/sparc | |
6 | * platform. | |
7 | */ | |
8 | ||
1da177e4 LT |
9 | #include <linux/errno.h> |
10 | #include <linux/types.h> | |
11 | #include <linux/sched.h> | |
12 | #include <linux/fs.h> | |
13 | #include <linux/file.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/sem.h> | |
16 | #include <linux/msg.h> | |
17 | #include <linux/shm.h> | |
18 | #include <linux/stat.h> | |
19 | #include <linux/mman.h> | |
20 | #include <linux/utsname.h> | |
21 | #include <linux/smp.h> | |
22 | #include <linux/smp_lock.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/syscalls.h> | |
25 | #include <linux/ipc.h> | |
26 | #include <linux/personality.h> | |
05f9ca83 | 27 | #include <linux/random.h> |
1da177e4 LT |
28 | |
29 | #include <asm/uaccess.h> | |
30 | #include <asm/ipc.h> | |
31 | #include <asm/utrap.h> | |
32 | #include <asm/perfctr.h> | |
d61e16df | 33 | #include <asm/a.out.h> |
1da177e4 LT |
34 | |
35 | /* #define DEBUG_UNIMP_SYSCALL */ | |
36 | ||
1da177e4 LT |
37 | asmlinkage unsigned long sys_getpagesize(void) |
38 | { | |
39 | return PAGE_SIZE; | |
40 | } | |
41 | ||
8bcd1741 DM |
42 | #define VA_EXCLUDE_START (0x0000080000000000UL - (1UL << 32UL)) |
43 | #define VA_EXCLUDE_END (0xfffff80000000000UL + (1UL << 32UL)) | |
44 | ||
45 | /* Does addr --> addr+len fall within 4GB of the VA-space hole or | |
46 | * overflow past the end of the 64-bit address space? | |
47 | */ | |
48 | static 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 | /* Does start,end straddle the VA-space hole? */ | |
70 | static inline int straddles_64bit_va_hole(unsigned long start, unsigned long end) | |
71 | { | |
72 | unsigned long va_exclude_start, va_exclude_end; | |
73 | ||
74 | va_exclude_start = VA_EXCLUDE_START; | |
75 | va_exclude_end = VA_EXCLUDE_END; | |
76 | ||
77 | if (likely(start < va_exclude_start && end < va_exclude_start)) | |
78 | return 0; | |
79 | ||
80 | if (likely(start >= va_exclude_end && end >= va_exclude_end)) | |
81 | return 0; | |
82 | ||
83 | return 1; | |
84 | } | |
85 | ||
a91690dd DM |
86 | /* These functions differ from the default implementations in |
87 | * mm/mmap.c in two ways: | |
88 | * | |
89 | * 1) For file backed MAP_SHARED mmap()'s we D-cache color align, | |
90 | * for fixed such mappings we just validate what the user gave us. | |
91 | * 2) For 64-bit tasks we avoid mapping anything within 4GB of | |
92 | * the spitfire/niagara VA-hole. | |
93 | */ | |
94 | ||
95 | static inline unsigned long COLOUR_ALIGN(unsigned long addr, | |
96 | unsigned long pgoff) | |
97 | { | |
98 | unsigned long base = (addr+SHMLBA-1)&~(SHMLBA-1); | |
99 | unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1); | |
100 | ||
101 | return base + off; | |
102 | } | |
103 | ||
104 | static inline unsigned long COLOUR_ALIGN_DOWN(unsigned long addr, | |
105 | unsigned long pgoff) | |
106 | { | |
107 | unsigned long base = addr & ~(SHMLBA-1); | |
108 | unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1); | |
109 | ||
110 | if (base + off <= addr) | |
111 | return base + off; | |
112 | return base - off; | |
113 | } | |
1da177e4 LT |
114 | |
115 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) | |
116 | { | |
117 | struct mm_struct *mm = current->mm; | |
118 | struct vm_area_struct * vma; | |
119 | unsigned long task_size = TASK_SIZE; | |
120 | unsigned long start_addr; | |
121 | int do_color_align; | |
122 | ||
123 | if (flags & MAP_FIXED) { | |
124 | /* We do not accept a shared mapping if it would violate | |
125 | * cache aliasing constraints. | |
126 | */ | |
127 | if ((flags & MAP_SHARED) && | |
128 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
129 | return -EINVAL; | |
130 | return addr; | |
131 | } | |
132 | ||
133 | if (test_thread_flag(TIF_32BIT)) | |
d61e16df | 134 | task_size = STACK_TOP32; |
a91690dd | 135 | if (unlikely(len > task_size || len >= VA_EXCLUDE_START)) |
1da177e4 LT |
136 | return -ENOMEM; |
137 | ||
138 | do_color_align = 0; | |
139 | if (filp || (flags & MAP_SHARED)) | |
140 | do_color_align = 1; | |
141 | ||
142 | if (addr) { | |
143 | if (do_color_align) | |
144 | addr = COLOUR_ALIGN(addr, pgoff); | |
145 | else | |
146 | addr = PAGE_ALIGN(addr); | |
147 | ||
148 | vma = find_vma(mm, addr); | |
149 | if (task_size - len >= addr && | |
150 | (!vma || addr + len <= vma->vm_start)) | |
151 | return addr; | |
152 | } | |
153 | ||
a91690dd DM |
154 | if (len > mm->cached_hole_size) { |
155 | start_addr = addr = mm->free_area_cache; | |
156 | } else { | |
157 | start_addr = addr = TASK_UNMAPPED_BASE; | |
1363c3cd | 158 | mm->cached_hole_size = 0; |
1363c3cd | 159 | } |
1da177e4 LT |
160 | |
161 | task_size -= len; | |
162 | ||
163 | full_search: | |
164 | if (do_color_align) | |
165 | addr = COLOUR_ALIGN(addr, pgoff); | |
166 | else | |
167 | addr = PAGE_ALIGN(addr); | |
168 | ||
169 | for (vma = find_vma(mm, addr); ; vma = vma->vm_next) { | |
170 | /* At this point: (!vma || addr < vma->vm_end). */ | |
8bcd1741 DM |
171 | if (addr < VA_EXCLUDE_START && |
172 | (addr + len) >= VA_EXCLUDE_START) { | |
173 | addr = VA_EXCLUDE_END; | |
174 | vma = find_vma(mm, VA_EXCLUDE_END); | |
1da177e4 | 175 | } |
a91690dd | 176 | if (unlikely(task_size < addr)) { |
1da177e4 LT |
177 | if (start_addr != TASK_UNMAPPED_BASE) { |
178 | start_addr = addr = TASK_UNMAPPED_BASE; | |
1363c3cd | 179 | mm->cached_hole_size = 0; |
1da177e4 LT |
180 | goto full_search; |
181 | } | |
182 | return -ENOMEM; | |
183 | } | |
a91690dd | 184 | if (likely(!vma || addr + len <= vma->vm_start)) { |
1da177e4 LT |
185 | /* |
186 | * Remember the place where we stopped the search: | |
187 | */ | |
188 | mm->free_area_cache = addr + len; | |
189 | return addr; | |
190 | } | |
1363c3cd WW |
191 | if (addr + mm->cached_hole_size < vma->vm_start) |
192 | mm->cached_hole_size = vma->vm_start - addr; | |
193 | ||
1da177e4 LT |
194 | addr = vma->vm_end; |
195 | if (do_color_align) | |
196 | addr = COLOUR_ALIGN(addr, pgoff); | |
197 | } | |
198 | } | |
199 | ||
a91690dd DM |
200 | unsigned long |
201 | arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, | |
202 | const unsigned long len, const unsigned long pgoff, | |
203 | const unsigned long flags) | |
204 | { | |
205 | struct vm_area_struct *vma; | |
206 | struct mm_struct *mm = current->mm; | |
d61e16df | 207 | unsigned long task_size = STACK_TOP32; |
a91690dd DM |
208 | unsigned long addr = addr0; |
209 | int do_color_align; | |
210 | ||
211 | /* This should only ever run for 32-bit processes. */ | |
212 | BUG_ON(!test_thread_flag(TIF_32BIT)); | |
213 | ||
214 | if (flags & MAP_FIXED) { | |
215 | /* We do not accept a shared mapping if it would violate | |
216 | * cache aliasing constraints. | |
217 | */ | |
218 | if ((flags & MAP_SHARED) && | |
219 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
220 | return -EINVAL; | |
221 | return addr; | |
222 | } | |
223 | ||
224 | if (unlikely(len > task_size)) | |
225 | return -ENOMEM; | |
226 | ||
227 | do_color_align = 0; | |
228 | if (filp || (flags & MAP_SHARED)) | |
229 | do_color_align = 1; | |
230 | ||
231 | /* requesting a specific address */ | |
232 | if (addr) { | |
233 | if (do_color_align) | |
234 | addr = COLOUR_ALIGN(addr, pgoff); | |
235 | else | |
236 | addr = PAGE_ALIGN(addr); | |
237 | ||
238 | vma = find_vma(mm, addr); | |
239 | if (task_size - len >= addr && | |
240 | (!vma || addr + len <= vma->vm_start)) | |
241 | return addr; | |
242 | } | |
243 | ||
244 | /* check if free_area_cache is useful for us */ | |
245 | if (len <= mm->cached_hole_size) { | |
246 | mm->cached_hole_size = 0; | |
247 | mm->free_area_cache = mm->mmap_base; | |
248 | } | |
249 | ||
250 | /* either no address requested or can't fit in requested address hole */ | |
251 | addr = mm->free_area_cache; | |
252 | if (do_color_align) { | |
253 | unsigned long base = COLOUR_ALIGN_DOWN(addr-len, pgoff); | |
254 | ||
255 | addr = base + len; | |
256 | } | |
257 | ||
258 | /* make sure it can fit in the remaining address space */ | |
259 | if (likely(addr > len)) { | |
260 | vma = find_vma(mm, addr-len); | |
261 | if (!vma || addr <= vma->vm_start) { | |
262 | /* remember the address as a hint for next time */ | |
263 | return (mm->free_area_cache = addr-len); | |
264 | } | |
265 | } | |
266 | ||
267 | if (unlikely(mm->mmap_base < len)) | |
268 | goto bottomup; | |
269 | ||
270 | addr = mm->mmap_base-len; | |
271 | if (do_color_align) | |
272 | addr = COLOUR_ALIGN_DOWN(addr, pgoff); | |
273 | ||
274 | do { | |
275 | /* | |
276 | * Lookup failure means no vma is above this address, | |
277 | * else if new region fits below vma->vm_start, | |
278 | * return with success: | |
279 | */ | |
280 | vma = find_vma(mm, addr); | |
281 | if (likely(!vma || addr+len <= vma->vm_start)) { | |
282 | /* remember the address as a hint for next time */ | |
283 | return (mm->free_area_cache = addr); | |
284 | } | |
285 | ||
286 | /* remember the largest hole we saw so far */ | |
287 | if (addr + mm->cached_hole_size < vma->vm_start) | |
288 | mm->cached_hole_size = vma->vm_start - addr; | |
289 | ||
290 | /* try just below the current vma->vm_start */ | |
291 | addr = vma->vm_start-len; | |
292 | if (do_color_align) | |
293 | addr = COLOUR_ALIGN_DOWN(addr, pgoff); | |
294 | } while (likely(len < vma->vm_start)); | |
295 | ||
296 | bottomup: | |
297 | /* | |
298 | * A failed mmap() very likely causes application failure, | |
299 | * so fall back to the bottom-up function here. This scenario | |
300 | * can happen with large stack limits and large mmap() | |
301 | * allocations. | |
302 | */ | |
303 | mm->cached_hole_size = ~0UL; | |
304 | mm->free_area_cache = TASK_UNMAPPED_BASE; | |
305 | addr = arch_get_unmapped_area(filp, addr0, len, pgoff, flags); | |
306 | /* | |
307 | * Restore the topdown base: | |
308 | */ | |
309 | mm->free_area_cache = mm->mmap_base; | |
310 | mm->cached_hole_size = ~0UL; | |
311 | ||
312 | return addr; | |
313 | } | |
314 | ||
1da177e4 LT |
315 | /* Try to align mapping such that we align it as much as possible. */ |
316 | unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags) | |
317 | { | |
318 | unsigned long align_goal, addr = -ENOMEM; | |
319 | ||
320 | if (flags & MAP_FIXED) { | |
321 | /* Ok, don't mess with it. */ | |
322 | return get_unmapped_area(NULL, addr, len, pgoff, flags); | |
323 | } | |
324 | flags &= ~MAP_SHARED; | |
325 | ||
326 | align_goal = PAGE_SIZE; | |
327 | if (len >= (4UL * 1024 * 1024)) | |
328 | align_goal = (4UL * 1024 * 1024); | |
329 | else if (len >= (512UL * 1024)) | |
330 | align_goal = (512UL * 1024); | |
331 | else if (len >= (64UL * 1024)) | |
332 | align_goal = (64UL * 1024); | |
333 | ||
334 | do { | |
335 | addr = get_unmapped_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags); | |
336 | if (!(addr & ~PAGE_MASK)) { | |
337 | addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL); | |
338 | break; | |
339 | } | |
340 | ||
341 | if (align_goal == (4UL * 1024 * 1024)) | |
342 | align_goal = (512UL * 1024); | |
343 | else if (align_goal == (512UL * 1024)) | |
344 | align_goal = (64UL * 1024); | |
345 | else | |
346 | align_goal = PAGE_SIZE; | |
347 | } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE); | |
348 | ||
349 | /* Mapping is smaller than 64K or larger areas could not | |
350 | * be obtained. | |
351 | */ | |
352 | if (addr & ~PAGE_MASK) | |
353 | addr = get_unmapped_area(NULL, orig_addr, len, pgoff, flags); | |
354 | ||
355 | return addr; | |
356 | } | |
357 | ||
a91690dd DM |
358 | /* Essentially the same as PowerPC... */ |
359 | void arch_pick_mmap_layout(struct mm_struct *mm) | |
360 | { | |
05f9ca83 DM |
361 | unsigned long random_factor = 0UL; |
362 | ||
363 | if (current->flags & PF_RANDOMIZE) { | |
364 | random_factor = get_random_int(); | |
365 | if (test_thread_flag(TIF_32BIT)) | |
366 | random_factor &= ((1 * 1024 * 1024) - 1); | |
367 | else | |
368 | random_factor = ((random_factor << PAGE_SHIFT) & | |
369 | 0xffffffffUL); | |
370 | } | |
371 | ||
a91690dd DM |
372 | /* |
373 | * Fall back to the standard layout if the personality | |
374 | * bit is set, or if the expected stack growth is unlimited: | |
375 | */ | |
376 | if (!test_thread_flag(TIF_32BIT) || | |
377 | (current->personality & ADDR_COMPAT_LAYOUT) || | |
378 | current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY || | |
379 | sysctl_legacy_va_layout) { | |
05f9ca83 | 380 | mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; |
a91690dd DM |
381 | mm->get_unmapped_area = arch_get_unmapped_area; |
382 | mm->unmap_area = arch_unmap_area; | |
383 | } else { | |
384 | /* We know it's 32-bit */ | |
d61e16df | 385 | unsigned long task_size = STACK_TOP32; |
a91690dd DM |
386 | unsigned long gap; |
387 | ||
388 | gap = current->signal->rlim[RLIMIT_STACK].rlim_cur; | |
389 | if (gap < 128 * 1024 * 1024) | |
390 | gap = 128 * 1024 * 1024; | |
391 | if (gap > (task_size / 6 * 5)) | |
392 | gap = (task_size / 6 * 5); | |
393 | ||
05f9ca83 | 394 | mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor); |
a91690dd DM |
395 | mm->get_unmapped_area = arch_get_unmapped_area_topdown; |
396 | mm->unmap_area = arch_unmap_area_topdown; | |
397 | } | |
398 | } | |
399 | ||
1da177e4 LT |
400 | asmlinkage unsigned long sparc_brk(unsigned long brk) |
401 | { | |
402 | /* People could try to be nasty and use ta 0x6d in 32bit programs */ | |
d61e16df | 403 | if (test_thread_flag(TIF_32BIT) && brk >= STACK_TOP32) |
1da177e4 LT |
404 | return current->mm->brk; |
405 | ||
8bcd1741 | 406 | if (unlikely(straddles_64bit_va_hole(current->mm->brk, brk))) |
1da177e4 | 407 | return current->mm->brk; |
8bcd1741 | 408 | |
1da177e4 LT |
409 | return sys_brk(brk); |
410 | } | |
411 | ||
412 | /* | |
413 | * sys_pipe() is the normal C calling standard for creating | |
414 | * a pipe. It's not the way unix traditionally does this, though. | |
415 | */ | |
416 | asmlinkage long sparc_pipe(struct pt_regs *regs) | |
417 | { | |
418 | int fd[2]; | |
419 | int error; | |
420 | ||
421 | error = do_pipe(fd); | |
422 | if (error) | |
423 | goto out; | |
424 | regs->u_regs[UREG_I1] = fd[1]; | |
425 | error = fd[0]; | |
426 | out: | |
427 | return error; | |
428 | } | |
429 | ||
430 | /* | |
431 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
432 | * | |
433 | * This is really horribly ugly. | |
434 | */ | |
435 | ||
436 | asmlinkage long sys_ipc(unsigned int call, int first, unsigned long second, | |
437 | unsigned long third, void __user *ptr, long fifth) | |
438 | { | |
439 | int err; | |
440 | ||
441 | /* No need for backward compatibility. We can start fresh... */ | |
442 | if (call <= SEMCTL) { | |
443 | switch (call) { | |
444 | case SEMOP: | |
445 | err = sys_semtimedop(first, ptr, | |
446 | (unsigned)second, NULL); | |
447 | goto out; | |
448 | case SEMTIMEDOP: | |
449 | err = sys_semtimedop(first, ptr, (unsigned)second, | |
450 | (const struct timespec __user *) fifth); | |
451 | goto out; | |
452 | case SEMGET: | |
453 | err = sys_semget(first, (int)second, (int)third); | |
454 | goto out; | |
455 | case SEMCTL: { | |
456 | union semun fourth; | |
457 | err = -EINVAL; | |
458 | if (!ptr) | |
459 | goto out; | |
460 | err = -EFAULT; | |
461 | if (get_user(fourth.__pad, | |
462 | (void __user * __user *) ptr)) | |
463 | goto out; | |
464 | err = sys_semctl(first, (int)second | IPC_64, | |
465 | (int)third, fourth); | |
466 | goto out; | |
467 | } | |
468 | default: | |
469 | err = -ENOSYS; | |
470 | goto out; | |
471 | }; | |
472 | } | |
473 | if (call <= MSGCTL) { | |
474 | switch (call) { | |
475 | case MSGSND: | |
476 | err = sys_msgsnd(first, ptr, (size_t)second, | |
477 | (int)third); | |
478 | goto out; | |
479 | case MSGRCV: | |
480 | err = sys_msgrcv(first, ptr, (size_t)second, fifth, | |
481 | (int)third); | |
482 | goto out; | |
483 | case MSGGET: | |
484 | err = sys_msgget((key_t)first, (int)second); | |
485 | goto out; | |
486 | case MSGCTL: | |
487 | err = sys_msgctl(first, (int)second | IPC_64, ptr); | |
488 | goto out; | |
489 | default: | |
490 | err = -ENOSYS; | |
491 | goto out; | |
492 | }; | |
493 | } | |
494 | if (call <= SHMCTL) { | |
495 | switch (call) { | |
496 | case SHMAT: { | |
497 | ulong raddr; | |
498 | err = do_shmat(first, ptr, (int)second, &raddr); | |
499 | if (!err) { | |
500 | if (put_user(raddr, | |
501 | (ulong __user *) third)) | |
502 | err = -EFAULT; | |
503 | } | |
504 | goto out; | |
505 | } | |
506 | case SHMDT: | |
507 | err = sys_shmdt(ptr); | |
508 | goto out; | |
509 | case SHMGET: | |
510 | err = sys_shmget(first, (size_t)second, (int)third); | |
511 | goto out; | |
512 | case SHMCTL: | |
513 | err = sys_shmctl(first, (int)second | IPC_64, ptr); | |
514 | goto out; | |
515 | default: | |
516 | err = -ENOSYS; | |
517 | goto out; | |
518 | }; | |
519 | } else { | |
520 | err = -ENOSYS; | |
521 | } | |
522 | out: | |
523 | return err; | |
524 | } | |
525 | ||
526 | asmlinkage long sparc64_newuname(struct new_utsname __user *name) | |
527 | { | |
528 | int ret = sys_newuname(name); | |
529 | ||
530 | if (current->personality == PER_LINUX32 && !ret) { | |
531 | ret = (copy_to_user(name->machine, "sparc\0\0", 8) | |
532 | ? -EFAULT : 0); | |
533 | } | |
534 | return ret; | |
535 | } | |
536 | ||
537 | asmlinkage long sparc64_personality(unsigned long personality) | |
538 | { | |
539 | int ret; | |
540 | ||
541 | if (current->personality == PER_LINUX32 && | |
542 | personality == PER_LINUX) | |
543 | personality = PER_LINUX32; | |
544 | ret = sys_personality(personality); | |
545 | if (ret == PER_LINUX32) | |
546 | ret = PER_LINUX; | |
547 | ||
548 | return ret; | |
549 | } | |
550 | ||
3a459756 KK |
551 | int sparc64_mmap_check(unsigned long addr, unsigned long len, |
552 | unsigned long flags) | |
553 | { | |
554 | if (test_thread_flag(TIF_32BIT)) { | |
555 | if (len >= STACK_TOP32) | |
556 | return -EINVAL; | |
557 | ||
558 | if ((flags & MAP_FIXED) && addr > STACK_TOP32 - len) | |
559 | return -EINVAL; | |
560 | } else { | |
561 | if (len >= VA_EXCLUDE_START) | |
562 | return -EINVAL; | |
563 | ||
564 | if ((flags & MAP_FIXED) && invalid_64bit_range(addr, len)) | |
565 | return -EINVAL; | |
566 | } | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
1da177e4 LT |
571 | /* Linux version of mmap */ |
572 | asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, | |
573 | unsigned long prot, unsigned long flags, unsigned long fd, | |
574 | unsigned long off) | |
575 | { | |
576 | struct file * file = NULL; | |
577 | unsigned long retval = -EBADF; | |
578 | ||
579 | if (!(flags & MAP_ANONYMOUS)) { | |
580 | file = fget(fd); | |
581 | if (!file) | |
582 | goto out; | |
583 | } | |
584 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
585 | len = PAGE_ALIGN(len); | |
1da177e4 LT |
586 | |
587 | down_write(¤t->mm->mmap_sem); | |
588 | retval = do_mmap(file, addr, len, prot, flags, off); | |
589 | up_write(¤t->mm->mmap_sem); | |
590 | ||
1da177e4 LT |
591 | if (file) |
592 | fput(file); | |
593 | out: | |
594 | return retval; | |
595 | } | |
596 | ||
597 | asmlinkage long sys64_munmap(unsigned long addr, size_t len) | |
598 | { | |
599 | long ret; | |
600 | ||
8bcd1741 | 601 | if (invalid_64bit_range(addr, len)) |
1da177e4 | 602 | return -EINVAL; |
8bcd1741 | 603 | |
1da177e4 LT |
604 | down_write(¤t->mm->mmap_sem); |
605 | ret = do_munmap(current->mm, addr, len); | |
606 | up_write(¤t->mm->mmap_sem); | |
607 | return ret; | |
608 | } | |
609 | ||
610 | extern unsigned long do_mremap(unsigned long addr, | |
611 | unsigned long old_len, unsigned long new_len, | |
612 | unsigned long flags, unsigned long new_addr); | |
613 | ||
614 | asmlinkage unsigned long sys64_mremap(unsigned long addr, | |
615 | unsigned long old_len, unsigned long new_len, | |
616 | unsigned long flags, unsigned long new_addr) | |
617 | { | |
618 | struct vm_area_struct *vma; | |
619 | unsigned long ret = -EINVAL; | |
8bcd1741 | 620 | |
1da177e4 LT |
621 | if (test_thread_flag(TIF_32BIT)) |
622 | goto out; | |
8bcd1741 | 623 | if (unlikely(new_len >= VA_EXCLUDE_START)) |
1da177e4 | 624 | goto out; |
8bcd1741 | 625 | if (unlikely(invalid_64bit_range(addr, old_len))) |
1da177e4 | 626 | goto out; |
8bcd1741 | 627 | |
1da177e4 LT |
628 | down_write(¤t->mm->mmap_sem); |
629 | if (flags & MREMAP_FIXED) { | |
8bcd1741 | 630 | if (invalid_64bit_range(new_addr, new_len)) |
1da177e4 | 631 | goto out_sem; |
8bcd1741 | 632 | } else if (invalid_64bit_range(addr, new_len)) { |
1da177e4 LT |
633 | unsigned long map_flags = 0; |
634 | struct file *file = NULL; | |
635 | ||
636 | ret = -ENOMEM; | |
637 | if (!(flags & MREMAP_MAYMOVE)) | |
638 | goto out_sem; | |
639 | ||
640 | vma = find_vma(current->mm, addr); | |
641 | if (vma) { | |
642 | if (vma->vm_flags & VM_SHARED) | |
643 | map_flags |= MAP_SHARED; | |
644 | file = vma->vm_file; | |
645 | } | |
646 | ||
647 | /* MREMAP_FIXED checked above. */ | |
648 | new_addr = get_unmapped_area(file, addr, new_len, | |
649 | vma ? vma->vm_pgoff : 0, | |
650 | map_flags); | |
651 | ret = new_addr; | |
652 | if (new_addr & ~PAGE_MASK) | |
653 | goto out_sem; | |
654 | flags |= MREMAP_FIXED; | |
655 | } | |
656 | ret = do_mremap(addr, old_len, new_len, flags, new_addr); | |
657 | out_sem: | |
658 | up_write(¤t->mm->mmap_sem); | |
659 | out: | |
660 | return ret; | |
661 | } | |
662 | ||
663 | /* we come to here via sys_nis_syscall so it can setup the regs argument */ | |
664 | asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs) | |
665 | { | |
666 | static int count; | |
667 | ||
668 | /* Don't make the system unusable, if someone goes stuck */ | |
669 | if (count++ > 5) | |
670 | return -ENOSYS; | |
671 | ||
672 | printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]); | |
673 | #ifdef DEBUG_UNIMP_SYSCALL | |
674 | show_regs (regs); | |
675 | #endif | |
676 | ||
677 | return -ENOSYS; | |
678 | } | |
679 | ||
680 | /* #define DEBUG_SPARC_BREAKPOINT */ | |
681 | ||
682 | asmlinkage void sparc_breakpoint(struct pt_regs *regs) | |
683 | { | |
684 | siginfo_t info; | |
685 | ||
686 | if (test_thread_flag(TIF_32BIT)) { | |
687 | regs->tpc &= 0xffffffff; | |
688 | regs->tnpc &= 0xffffffff; | |
689 | } | |
690 | #ifdef DEBUG_SPARC_BREAKPOINT | |
691 | printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc); | |
692 | #endif | |
693 | info.si_signo = SIGTRAP; | |
694 | info.si_errno = 0; | |
695 | info.si_code = TRAP_BRKPT; | |
696 | info.si_addr = (void __user *)regs->tpc; | |
697 | info.si_trapno = 0; | |
698 | force_sig_info(SIGTRAP, &info, current); | |
699 | #ifdef DEBUG_SPARC_BREAKPOINT | |
700 | printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc); | |
701 | #endif | |
702 | } | |
703 | ||
704 | extern void check_pending(int signum); | |
705 | ||
706 | asmlinkage long sys_getdomainname(char __user *name, int len) | |
707 | { | |
8310a32c DM |
708 | int nlen, err; |
709 | ||
b9c54f91 | 710 | if (len < 0) |
8310a32c | 711 | return -EINVAL; |
1da177e4 LT |
712 | |
713 | down_read(&uts_sem); | |
714 | ||
715 | nlen = strlen(system_utsname.domainname) + 1; | |
b9c54f91 AW |
716 | err = -EINVAL; |
717 | if (nlen > len) | |
718 | goto out; | |
8310a32c DM |
719 | |
720 | err = -EFAULT; | |
b9c54f91 | 721 | if (!copy_to_user(name, system_utsname.domainname, nlen)) |
8310a32c DM |
722 | err = 0; |
723 | ||
b9c54f91 | 724 | out: |
1da177e4 LT |
725 | up_read(&uts_sem); |
726 | return err; | |
727 | } | |
728 | ||
729 | asmlinkage long solaris_syscall(struct pt_regs *regs) | |
730 | { | |
731 | static int count; | |
732 | ||
733 | regs->tpc = regs->tnpc; | |
734 | regs->tnpc += 4; | |
735 | if (test_thread_flag(TIF_32BIT)) { | |
736 | regs->tpc &= 0xffffffff; | |
737 | regs->tnpc &= 0xffffffff; | |
738 | } | |
739 | if (++count <= 5) { | |
740 | printk ("For Solaris binary emulation you need solaris module loaded\n"); | |
741 | show_regs (regs); | |
742 | } | |
743 | send_sig(SIGSEGV, current, 1); | |
744 | ||
745 | return -ENOSYS; | |
746 | } | |
747 | ||
748 | #ifndef CONFIG_SUNOS_EMUL | |
749 | asmlinkage long sunos_syscall(struct pt_regs *regs) | |
750 | { | |
751 | static int count; | |
752 | ||
753 | regs->tpc = regs->tnpc; | |
754 | regs->tnpc += 4; | |
755 | if (test_thread_flag(TIF_32BIT)) { | |
756 | regs->tpc &= 0xffffffff; | |
757 | regs->tnpc &= 0xffffffff; | |
758 | } | |
759 | if (++count <= 20) | |
760 | printk ("SunOS binary emulation not compiled in\n"); | |
761 | force_sig(SIGSEGV, current); | |
762 | ||
763 | return -ENOSYS; | |
764 | } | |
765 | #endif | |
766 | ||
767 | asmlinkage long sys_utrap_install(utrap_entry_t type, | |
768 | utrap_handler_t new_p, | |
769 | utrap_handler_t new_d, | |
770 | utrap_handler_t __user *old_p, | |
771 | utrap_handler_t __user *old_d) | |
772 | { | |
773 | if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31) | |
774 | return -EINVAL; | |
775 | if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) { | |
776 | if (old_p) { | |
777 | if (!current_thread_info()->utraps) { | |
778 | if (put_user(NULL, old_p)) | |
779 | return -EFAULT; | |
780 | } else { | |
781 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
782 | return -EFAULT; | |
783 | } | |
784 | } | |
785 | if (old_d) { | |
786 | if (put_user(NULL, old_d)) | |
787 | return -EFAULT; | |
788 | } | |
789 | return 0; | |
790 | } | |
791 | if (!current_thread_info()->utraps) { | |
792 | current_thread_info()->utraps = | |
9132983a | 793 | kzalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL); |
1da177e4 LT |
794 | if (!current_thread_info()->utraps) |
795 | return -ENOMEM; | |
796 | current_thread_info()->utraps[0] = 1; | |
1da177e4 LT |
797 | } else { |
798 | if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p && | |
799 | current_thread_info()->utraps[0] > 1) { | |
800 | long *p = current_thread_info()->utraps; | |
801 | ||
802 | current_thread_info()->utraps = | |
803 | kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), | |
804 | GFP_KERNEL); | |
805 | if (!current_thread_info()->utraps) { | |
806 | current_thread_info()->utraps = p; | |
807 | return -ENOMEM; | |
808 | } | |
809 | p[0]--; | |
810 | current_thread_info()->utraps[0] = 1; | |
811 | memcpy(current_thread_info()->utraps+1, p+1, | |
812 | UT_TRAP_INSTRUCTION_31*sizeof(long)); | |
813 | } | |
814 | } | |
815 | if (old_p) { | |
816 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
817 | return -EFAULT; | |
818 | } | |
819 | if (old_d) { | |
820 | if (put_user(NULL, old_d)) | |
821 | return -EFAULT; | |
822 | } | |
823 | current_thread_info()->utraps[type] = (long)new_p; | |
824 | ||
825 | return 0; | |
826 | } | |
827 | ||
828 | long sparc_memory_ordering(unsigned long model, struct pt_regs *regs) | |
829 | { | |
830 | if (model >= 3) | |
831 | return -EINVAL; | |
832 | regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14); | |
833 | return 0; | |
834 | } | |
835 | ||
836 | asmlinkage long sys_rt_sigaction(int sig, | |
837 | const struct sigaction __user *act, | |
838 | struct sigaction __user *oact, | |
839 | void __user *restorer, | |
840 | size_t sigsetsize) | |
841 | { | |
842 | struct k_sigaction new_ka, old_ka; | |
843 | int ret; | |
844 | ||
845 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
846 | if (sigsetsize != sizeof(sigset_t)) | |
847 | return -EINVAL; | |
848 | ||
849 | if (act) { | |
850 | new_ka.ka_restorer = restorer; | |
851 | if (copy_from_user(&new_ka.sa, act, sizeof(*act))) | |
852 | return -EFAULT; | |
853 | } | |
854 | ||
855 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
856 | ||
857 | if (!ret && oact) { | |
858 | if (copy_to_user(oact, &old_ka.sa, sizeof(*oact))) | |
859 | return -EFAULT; | |
860 | } | |
861 | ||
862 | return ret; | |
863 | } | |
864 | ||
865 | /* Invoked by rtrap code to update performance counters in | |
866 | * user space. | |
867 | */ | |
868 | asmlinkage void update_perfctrs(void) | |
869 | { | |
870 | unsigned long pic, tmp; | |
871 | ||
872 | read_pic(pic); | |
873 | tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic); | |
874 | __put_user(tmp, current_thread_info()->user_cntd0); | |
875 | tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32)); | |
876 | __put_user(tmp, current_thread_info()->user_cntd1); | |
877 | reset_pic(); | |
878 | } | |
879 | ||
880 | asmlinkage long sys_perfctr(int opcode, unsigned long arg0, unsigned long arg1, unsigned long arg2) | |
881 | { | |
882 | int err = 0; | |
883 | ||
884 | switch(opcode) { | |
885 | case PERFCTR_ON: | |
886 | current_thread_info()->pcr_reg = arg2; | |
887 | current_thread_info()->user_cntd0 = (u64 __user *) arg0; | |
888 | current_thread_info()->user_cntd1 = (u64 __user *) arg1; | |
889 | current_thread_info()->kernel_cntd0 = | |
890 | current_thread_info()->kernel_cntd1 = 0; | |
891 | write_pcr(arg2); | |
892 | reset_pic(); | |
893 | set_thread_flag(TIF_PERFCTR); | |
894 | break; | |
895 | ||
896 | case PERFCTR_OFF: | |
897 | err = -EINVAL; | |
898 | if (test_thread_flag(TIF_PERFCTR)) { | |
899 | current_thread_info()->user_cntd0 = | |
900 | current_thread_info()->user_cntd1 = NULL; | |
901 | current_thread_info()->pcr_reg = 0; | |
902 | write_pcr(0); | |
903 | clear_thread_flag(TIF_PERFCTR); | |
904 | err = 0; | |
905 | } | |
906 | break; | |
907 | ||
908 | case PERFCTR_READ: { | |
909 | unsigned long pic, tmp; | |
910 | ||
911 | if (!test_thread_flag(TIF_PERFCTR)) { | |
912 | err = -EINVAL; | |
913 | break; | |
914 | } | |
915 | read_pic(pic); | |
916 | tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic); | |
917 | err |= __put_user(tmp, current_thread_info()->user_cntd0); | |
918 | tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32)); | |
919 | err |= __put_user(tmp, current_thread_info()->user_cntd1); | |
920 | reset_pic(); | |
921 | break; | |
922 | } | |
923 | ||
924 | case PERFCTR_CLRPIC: | |
925 | if (!test_thread_flag(TIF_PERFCTR)) { | |
926 | err = -EINVAL; | |
927 | break; | |
928 | } | |
929 | current_thread_info()->kernel_cntd0 = | |
930 | current_thread_info()->kernel_cntd1 = 0; | |
931 | reset_pic(); | |
932 | break; | |
933 | ||
934 | case PERFCTR_SETPCR: { | |
935 | u64 __user *user_pcr = (u64 __user *)arg0; | |
936 | ||
937 | if (!test_thread_flag(TIF_PERFCTR)) { | |
938 | err = -EINVAL; | |
939 | break; | |
940 | } | |
941 | err |= __get_user(current_thread_info()->pcr_reg, user_pcr); | |
942 | write_pcr(current_thread_info()->pcr_reg); | |
943 | current_thread_info()->kernel_cntd0 = | |
944 | current_thread_info()->kernel_cntd1 = 0; | |
945 | reset_pic(); | |
946 | break; | |
947 | } | |
948 | ||
949 | case PERFCTR_GETPCR: { | |
950 | u64 __user *user_pcr = (u64 __user *)arg0; | |
951 | ||
952 | if (!test_thread_flag(TIF_PERFCTR)) { | |
953 | err = -EINVAL; | |
954 | break; | |
955 | } | |
956 | err |= __put_user(current_thread_info()->pcr_reg, user_pcr); | |
957 | break; | |
958 | } | |
959 | ||
960 | default: | |
961 | err = -EINVAL; | |
962 | break; | |
963 | }; | |
964 | return err; | |
965 | } |