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Commit | Line | Data |
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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> | |
1da177e4 LT |
22 | #include <linux/slab.h> |
23 | #include <linux/syscalls.h> | |
24 | #include <linux/ipc.h> | |
25 | #include <linux/personality.h> | |
05f9ca83 | 26 | #include <linux/random.h> |
1da177e4 LT |
27 | |
28 | #include <asm/uaccess.h> | |
1da177e4 LT |
29 | #include <asm/utrap.h> |
30 | #include <asm/perfctr.h> | |
fe74290d | 31 | #include <asm/unistd.h> |
1da177e4 LT |
32 | |
33 | /* #define DEBUG_UNIMP_SYSCALL */ | |
34 | ||
1da177e4 LT |
35 | asmlinkage unsigned long sys_getpagesize(void) |
36 | { | |
37 | return PAGE_SIZE; | |
38 | } | |
39 | ||
8bcd1741 DM |
40 | #define VA_EXCLUDE_START (0x0000080000000000UL - (1UL << 32UL)) |
41 | #define VA_EXCLUDE_END (0xfffff80000000000UL + (1UL << 32UL)) | |
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 | */ | |
46 | static 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 | /* Does start,end straddle the VA-space hole? */ | |
68 | static inline int straddles_64bit_va_hole(unsigned long start, unsigned long end) | |
69 | { | |
70 | unsigned long va_exclude_start, va_exclude_end; | |
71 | ||
72 | va_exclude_start = VA_EXCLUDE_START; | |
73 | va_exclude_end = VA_EXCLUDE_END; | |
74 | ||
75 | if (likely(start < va_exclude_start && end < va_exclude_start)) | |
76 | return 0; | |
77 | ||
78 | if (likely(start >= va_exclude_end && end >= va_exclude_end)) | |
79 | return 0; | |
80 | ||
81 | return 1; | |
82 | } | |
83 | ||
a91690dd DM |
84 | /* These functions differ from the default implementations in |
85 | * mm/mmap.c in two ways: | |
86 | * | |
87 | * 1) For file backed MAP_SHARED mmap()'s we D-cache color align, | |
88 | * for fixed such mappings we just validate what the user gave us. | |
89 | * 2) For 64-bit tasks we avoid mapping anything within 4GB of | |
90 | * the spitfire/niagara VA-hole. | |
91 | */ | |
92 | ||
93 | static inline unsigned long COLOUR_ALIGN(unsigned long addr, | |
94 | unsigned long pgoff) | |
95 | { | |
96 | unsigned long base = (addr+SHMLBA-1)&~(SHMLBA-1); | |
97 | unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1); | |
98 | ||
99 | return base + off; | |
100 | } | |
101 | ||
102 | static inline unsigned long COLOUR_ALIGN_DOWN(unsigned long addr, | |
103 | unsigned long pgoff) | |
104 | { | |
105 | unsigned long base = addr & ~(SHMLBA-1); | |
106 | unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1); | |
107 | ||
108 | if (base + off <= addr) | |
109 | return base + off; | |
110 | return base - off; | |
111 | } | |
1da177e4 LT |
112 | |
113 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) | |
114 | { | |
115 | struct mm_struct *mm = current->mm; | |
116 | struct vm_area_struct * vma; | |
117 | unsigned long task_size = TASK_SIZE; | |
118 | unsigned long start_addr; | |
119 | int do_color_align; | |
120 | ||
121 | if (flags & MAP_FIXED) { | |
122 | /* We do not accept a shared mapping if it would violate | |
123 | * cache aliasing constraints. | |
124 | */ | |
125 | if ((flags & MAP_SHARED) && | |
126 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
127 | return -EINVAL; | |
128 | return addr; | |
129 | } | |
130 | ||
131 | if (test_thread_flag(TIF_32BIT)) | |
d61e16df | 132 | task_size = STACK_TOP32; |
a91690dd | 133 | if (unlikely(len > task_size || len >= VA_EXCLUDE_START)) |
1da177e4 LT |
134 | return -ENOMEM; |
135 | ||
136 | do_color_align = 0; | |
137 | if (filp || (flags & MAP_SHARED)) | |
138 | do_color_align = 1; | |
139 | ||
140 | if (addr) { | |
141 | if (do_color_align) | |
142 | addr = COLOUR_ALIGN(addr, pgoff); | |
143 | else | |
144 | addr = PAGE_ALIGN(addr); | |
145 | ||
146 | vma = find_vma(mm, addr); | |
147 | if (task_size - len >= addr && | |
148 | (!vma || addr + len <= vma->vm_start)) | |
149 | return addr; | |
150 | } | |
151 | ||
a91690dd DM |
152 | if (len > mm->cached_hole_size) { |
153 | start_addr = addr = mm->free_area_cache; | |
154 | } else { | |
155 | start_addr = addr = TASK_UNMAPPED_BASE; | |
1363c3cd | 156 | mm->cached_hole_size = 0; |
1363c3cd | 157 | } |
1da177e4 LT |
158 | |
159 | task_size -= len; | |
160 | ||
161 | full_search: | |
162 | if (do_color_align) | |
163 | addr = COLOUR_ALIGN(addr, pgoff); | |
164 | else | |
165 | addr = PAGE_ALIGN(addr); | |
166 | ||
167 | for (vma = find_vma(mm, addr); ; vma = vma->vm_next) { | |
168 | /* At this point: (!vma || addr < vma->vm_end). */ | |
8bcd1741 DM |
169 | if (addr < VA_EXCLUDE_START && |
170 | (addr + len) >= VA_EXCLUDE_START) { | |
171 | addr = VA_EXCLUDE_END; | |
172 | vma = find_vma(mm, VA_EXCLUDE_END); | |
1da177e4 | 173 | } |
a91690dd | 174 | if (unlikely(task_size < addr)) { |
1da177e4 LT |
175 | if (start_addr != TASK_UNMAPPED_BASE) { |
176 | start_addr = addr = TASK_UNMAPPED_BASE; | |
1363c3cd | 177 | mm->cached_hole_size = 0; |
1da177e4 LT |
178 | goto full_search; |
179 | } | |
180 | return -ENOMEM; | |
181 | } | |
a91690dd | 182 | if (likely(!vma || addr + len <= vma->vm_start)) { |
1da177e4 LT |
183 | /* |
184 | * Remember the place where we stopped the search: | |
185 | */ | |
186 | mm->free_area_cache = addr + len; | |
187 | return addr; | |
188 | } | |
1363c3cd WW |
189 | if (addr + mm->cached_hole_size < vma->vm_start) |
190 | mm->cached_hole_size = vma->vm_start - addr; | |
191 | ||
1da177e4 LT |
192 | addr = vma->vm_end; |
193 | if (do_color_align) | |
194 | addr = COLOUR_ALIGN(addr, pgoff); | |
195 | } | |
196 | } | |
197 | ||
a91690dd DM |
198 | unsigned long |
199 | arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, | |
200 | const unsigned long len, const unsigned long pgoff, | |
201 | const unsigned long flags) | |
202 | { | |
203 | struct vm_area_struct *vma; | |
204 | struct mm_struct *mm = current->mm; | |
d61e16df | 205 | unsigned long task_size = STACK_TOP32; |
a91690dd DM |
206 | unsigned long addr = addr0; |
207 | int do_color_align; | |
208 | ||
209 | /* This should only ever run for 32-bit processes. */ | |
210 | BUG_ON(!test_thread_flag(TIF_32BIT)); | |
211 | ||
212 | if (flags & MAP_FIXED) { | |
213 | /* We do not accept a shared mapping if it would violate | |
214 | * cache aliasing constraints. | |
215 | */ | |
216 | if ((flags & MAP_SHARED) && | |
217 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
218 | return -EINVAL; | |
219 | return addr; | |
220 | } | |
221 | ||
222 | if (unlikely(len > task_size)) | |
223 | return -ENOMEM; | |
224 | ||
225 | do_color_align = 0; | |
226 | if (filp || (flags & MAP_SHARED)) | |
227 | do_color_align = 1; | |
228 | ||
229 | /* requesting a specific address */ | |
230 | if (addr) { | |
231 | if (do_color_align) | |
232 | addr = COLOUR_ALIGN(addr, pgoff); | |
233 | else | |
234 | addr = PAGE_ALIGN(addr); | |
235 | ||
236 | vma = find_vma(mm, addr); | |
237 | if (task_size - len >= addr && | |
238 | (!vma || addr + len <= vma->vm_start)) | |
239 | return addr; | |
240 | } | |
241 | ||
242 | /* check if free_area_cache is useful for us */ | |
243 | if (len <= mm->cached_hole_size) { | |
244 | mm->cached_hole_size = 0; | |
245 | mm->free_area_cache = mm->mmap_base; | |
246 | } | |
247 | ||
248 | /* either no address requested or can't fit in requested address hole */ | |
249 | addr = mm->free_area_cache; | |
250 | if (do_color_align) { | |
251 | unsigned long base = COLOUR_ALIGN_DOWN(addr-len, pgoff); | |
252 | ||
253 | addr = base + len; | |
254 | } | |
255 | ||
256 | /* make sure it can fit in the remaining address space */ | |
257 | if (likely(addr > len)) { | |
258 | vma = find_vma(mm, addr-len); | |
259 | if (!vma || addr <= vma->vm_start) { | |
260 | /* remember the address as a hint for next time */ | |
261 | return (mm->free_area_cache = addr-len); | |
262 | } | |
263 | } | |
264 | ||
265 | if (unlikely(mm->mmap_base < len)) | |
266 | goto bottomup; | |
267 | ||
268 | addr = mm->mmap_base-len; | |
269 | if (do_color_align) | |
270 | addr = COLOUR_ALIGN_DOWN(addr, pgoff); | |
271 | ||
272 | do { | |
273 | /* | |
274 | * Lookup failure means no vma is above this address, | |
275 | * else if new region fits below vma->vm_start, | |
276 | * return with success: | |
277 | */ | |
278 | vma = find_vma(mm, addr); | |
279 | if (likely(!vma || addr+len <= vma->vm_start)) { | |
280 | /* remember the address as a hint for next time */ | |
281 | return (mm->free_area_cache = addr); | |
282 | } | |
283 | ||
284 | /* remember the largest hole we saw so far */ | |
285 | if (addr + mm->cached_hole_size < vma->vm_start) | |
286 | mm->cached_hole_size = vma->vm_start - addr; | |
287 | ||
288 | /* try just below the current vma->vm_start */ | |
289 | addr = vma->vm_start-len; | |
290 | if (do_color_align) | |
291 | addr = COLOUR_ALIGN_DOWN(addr, pgoff); | |
292 | } while (likely(len < vma->vm_start)); | |
293 | ||
294 | bottomup: | |
295 | /* | |
296 | * A failed mmap() very likely causes application failure, | |
297 | * so fall back to the bottom-up function here. This scenario | |
298 | * can happen with large stack limits and large mmap() | |
299 | * allocations. | |
300 | */ | |
301 | mm->cached_hole_size = ~0UL; | |
302 | mm->free_area_cache = TASK_UNMAPPED_BASE; | |
303 | addr = arch_get_unmapped_area(filp, addr0, len, pgoff, flags); | |
304 | /* | |
305 | * Restore the topdown base: | |
306 | */ | |
307 | mm->free_area_cache = mm->mmap_base; | |
308 | mm->cached_hole_size = ~0UL; | |
309 | ||
310 | return addr; | |
311 | } | |
312 | ||
1da177e4 LT |
313 | /* Try to align mapping such that we align it as much as possible. */ |
314 | unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags) | |
315 | { | |
316 | unsigned long align_goal, addr = -ENOMEM; | |
317 | ||
318 | if (flags & MAP_FIXED) { | |
319 | /* Ok, don't mess with it. */ | |
d58aa8c7 | 320 | return get_unmapped_area(NULL, orig_addr, len, pgoff, flags); |
1da177e4 LT |
321 | } |
322 | flags &= ~MAP_SHARED; | |
323 | ||
324 | align_goal = PAGE_SIZE; | |
325 | if (len >= (4UL * 1024 * 1024)) | |
326 | align_goal = (4UL * 1024 * 1024); | |
327 | else if (len >= (512UL * 1024)) | |
328 | align_goal = (512UL * 1024); | |
329 | else if (len >= (64UL * 1024)) | |
330 | align_goal = (64UL * 1024); | |
331 | ||
332 | do { | |
333 | addr = get_unmapped_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags); | |
334 | if (!(addr & ~PAGE_MASK)) { | |
335 | addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL); | |
336 | break; | |
337 | } | |
338 | ||
339 | if (align_goal == (4UL * 1024 * 1024)) | |
340 | align_goal = (512UL * 1024); | |
341 | else if (align_goal == (512UL * 1024)) | |
342 | align_goal = (64UL * 1024); | |
343 | else | |
344 | align_goal = PAGE_SIZE; | |
345 | } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE); | |
346 | ||
347 | /* Mapping is smaller than 64K or larger areas could not | |
348 | * be obtained. | |
349 | */ | |
350 | if (addr & ~PAGE_MASK) | |
351 | addr = get_unmapped_area(NULL, orig_addr, len, pgoff, flags); | |
352 | ||
353 | return addr; | |
354 | } | |
355 | ||
a91690dd DM |
356 | /* Essentially the same as PowerPC... */ |
357 | void arch_pick_mmap_layout(struct mm_struct *mm) | |
358 | { | |
05f9ca83 DM |
359 | unsigned long random_factor = 0UL; |
360 | ||
361 | if (current->flags & PF_RANDOMIZE) { | |
362 | random_factor = get_random_int(); | |
363 | if (test_thread_flag(TIF_32BIT)) | |
364 | random_factor &= ((1 * 1024 * 1024) - 1); | |
365 | else | |
366 | random_factor = ((random_factor << PAGE_SHIFT) & | |
367 | 0xffffffffUL); | |
368 | } | |
369 | ||
a91690dd DM |
370 | /* |
371 | * Fall back to the standard layout if the personality | |
372 | * bit is set, or if the expected stack growth is unlimited: | |
373 | */ | |
374 | if (!test_thread_flag(TIF_32BIT) || | |
375 | (current->personality & ADDR_COMPAT_LAYOUT) || | |
376 | current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY || | |
377 | sysctl_legacy_va_layout) { | |
05f9ca83 | 378 | mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; |
a91690dd DM |
379 | mm->get_unmapped_area = arch_get_unmapped_area; |
380 | mm->unmap_area = arch_unmap_area; | |
381 | } else { | |
382 | /* We know it's 32-bit */ | |
d61e16df | 383 | unsigned long task_size = STACK_TOP32; |
a91690dd DM |
384 | unsigned long gap; |
385 | ||
386 | gap = current->signal->rlim[RLIMIT_STACK].rlim_cur; | |
387 | if (gap < 128 * 1024 * 1024) | |
388 | gap = 128 * 1024 * 1024; | |
389 | if (gap > (task_size / 6 * 5)) | |
390 | gap = (task_size / 6 * 5); | |
391 | ||
05f9ca83 | 392 | mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor); |
a91690dd DM |
393 | mm->get_unmapped_area = arch_get_unmapped_area_topdown; |
394 | mm->unmap_area = arch_unmap_area_topdown; | |
395 | } | |
396 | } | |
397 | ||
1da177e4 LT |
398 | asmlinkage unsigned long sparc_brk(unsigned long brk) |
399 | { | |
400 | /* People could try to be nasty and use ta 0x6d in 32bit programs */ | |
d61e16df | 401 | if (test_thread_flag(TIF_32BIT) && brk >= STACK_TOP32) |
1da177e4 LT |
402 | return current->mm->brk; |
403 | ||
8bcd1741 | 404 | if (unlikely(straddles_64bit_va_hole(current->mm->brk, brk))) |
1da177e4 | 405 | return current->mm->brk; |
8bcd1741 | 406 | |
1da177e4 LT |
407 | return sys_brk(brk); |
408 | } | |
409 | ||
410 | /* | |
411 | * sys_pipe() is the normal C calling standard for creating | |
412 | * a pipe. It's not the way unix traditionally does this, though. | |
413 | */ | |
414 | asmlinkage long sparc_pipe(struct pt_regs *regs) | |
415 | { | |
416 | int fd[2]; | |
417 | int error; | |
418 | ||
419 | error = do_pipe(fd); | |
420 | if (error) | |
421 | goto out; | |
422 | regs->u_regs[UREG_I1] = fd[1]; | |
423 | error = fd[0]; | |
424 | out: | |
425 | return error; | |
426 | } | |
427 | ||
428 | /* | |
429 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
430 | * | |
431 | * This is really horribly ugly. | |
432 | */ | |
433 | ||
434 | asmlinkage long sys_ipc(unsigned int call, int first, unsigned long second, | |
435 | unsigned long third, void __user *ptr, long fifth) | |
436 | { | |
7379b42b | 437 | long err; |
1da177e4 LT |
438 | |
439 | /* No need for backward compatibility. We can start fresh... */ | |
440 | if (call <= SEMCTL) { | |
441 | switch (call) { | |
442 | case SEMOP: | |
443 | err = sys_semtimedop(first, ptr, | |
444 | (unsigned)second, NULL); | |
445 | goto out; | |
446 | case SEMTIMEDOP: | |
447 | err = sys_semtimedop(first, ptr, (unsigned)second, | |
448 | (const struct timespec __user *) fifth); | |
449 | goto out; | |
450 | case SEMGET: | |
451 | err = sys_semget(first, (int)second, (int)third); | |
452 | goto out; | |
453 | case SEMCTL: { | |
7379b42b DM |
454 | err = sys_semctl(first, third, |
455 | (int)second | IPC_64, | |
456 | (union semun) ptr); | |
1da177e4 LT |
457 | goto out; |
458 | } | |
459 | default: | |
460 | err = -ENOSYS; | |
461 | goto out; | |
462 | }; | |
463 | } | |
464 | if (call <= MSGCTL) { | |
465 | switch (call) { | |
466 | case MSGSND: | |
467 | err = sys_msgsnd(first, ptr, (size_t)second, | |
468 | (int)third); | |
469 | goto out; | |
470 | case MSGRCV: | |
471 | err = sys_msgrcv(first, ptr, (size_t)second, fifth, | |
472 | (int)third); | |
473 | goto out; | |
474 | case MSGGET: | |
475 | err = sys_msgget((key_t)first, (int)second); | |
476 | goto out; | |
477 | case MSGCTL: | |
478 | err = sys_msgctl(first, (int)second | IPC_64, ptr); | |
479 | goto out; | |
480 | default: | |
481 | err = -ENOSYS; | |
482 | goto out; | |
483 | }; | |
484 | } | |
485 | if (call <= SHMCTL) { | |
486 | switch (call) { | |
487 | case SHMAT: { | |
488 | ulong raddr; | |
489 | err = do_shmat(first, ptr, (int)second, &raddr); | |
490 | if (!err) { | |
491 | if (put_user(raddr, | |
492 | (ulong __user *) third)) | |
493 | err = -EFAULT; | |
494 | } | |
495 | goto out; | |
496 | } | |
497 | case SHMDT: | |
498 | err = sys_shmdt(ptr); | |
499 | goto out; | |
500 | case SHMGET: | |
501 | err = sys_shmget(first, (size_t)second, (int)third); | |
502 | goto out; | |
503 | case SHMCTL: | |
504 | err = sys_shmctl(first, (int)second | IPC_64, ptr); | |
505 | goto out; | |
506 | default: | |
507 | err = -ENOSYS; | |
508 | goto out; | |
509 | }; | |
510 | } else { | |
511 | err = -ENOSYS; | |
512 | } | |
513 | out: | |
514 | return err; | |
515 | } | |
516 | ||
517 | asmlinkage long sparc64_newuname(struct new_utsname __user *name) | |
518 | { | |
519 | int ret = sys_newuname(name); | |
520 | ||
521 | if (current->personality == PER_LINUX32 && !ret) { | |
522 | ret = (copy_to_user(name->machine, "sparc\0\0", 8) | |
523 | ? -EFAULT : 0); | |
524 | } | |
525 | return ret; | |
526 | } | |
527 | ||
528 | asmlinkage long sparc64_personality(unsigned long personality) | |
529 | { | |
530 | int ret; | |
531 | ||
532 | if (current->personality == PER_LINUX32 && | |
533 | personality == PER_LINUX) | |
534 | personality = PER_LINUX32; | |
535 | ret = sys_personality(personality); | |
536 | if (ret == PER_LINUX32) | |
537 | ret = PER_LINUX; | |
538 | ||
539 | return ret; | |
540 | } | |
541 | ||
3a459756 KK |
542 | int sparc64_mmap_check(unsigned long addr, unsigned long len, |
543 | unsigned long flags) | |
544 | { | |
545 | if (test_thread_flag(TIF_32BIT)) { | |
546 | if (len >= STACK_TOP32) | |
547 | return -EINVAL; | |
548 | ||
549 | if ((flags & MAP_FIXED) && addr > STACK_TOP32 - len) | |
550 | return -EINVAL; | |
551 | } else { | |
552 | if (len >= VA_EXCLUDE_START) | |
553 | return -EINVAL; | |
554 | ||
555 | if ((flags & MAP_FIXED) && invalid_64bit_range(addr, len)) | |
556 | return -EINVAL; | |
557 | } | |
558 | ||
559 | return 0; | |
560 | } | |
561 | ||
1da177e4 LT |
562 | /* Linux version of mmap */ |
563 | asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, | |
564 | unsigned long prot, unsigned long flags, unsigned long fd, | |
565 | unsigned long off) | |
566 | { | |
567 | struct file * file = NULL; | |
568 | unsigned long retval = -EBADF; | |
569 | ||
570 | if (!(flags & MAP_ANONYMOUS)) { | |
571 | file = fget(fd); | |
572 | if (!file) | |
573 | goto out; | |
574 | } | |
575 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
576 | len = PAGE_ALIGN(len); | |
1da177e4 LT |
577 | |
578 | down_write(¤t->mm->mmap_sem); | |
579 | retval = do_mmap(file, addr, len, prot, flags, off); | |
580 | up_write(¤t->mm->mmap_sem); | |
581 | ||
1da177e4 LT |
582 | if (file) |
583 | fput(file); | |
584 | out: | |
585 | return retval; | |
586 | } | |
587 | ||
588 | asmlinkage long sys64_munmap(unsigned long addr, size_t len) | |
589 | { | |
590 | long ret; | |
591 | ||
8bcd1741 | 592 | if (invalid_64bit_range(addr, len)) |
1da177e4 | 593 | return -EINVAL; |
8bcd1741 | 594 | |
1da177e4 LT |
595 | down_write(¤t->mm->mmap_sem); |
596 | ret = do_munmap(current->mm, addr, len); | |
597 | up_write(¤t->mm->mmap_sem); | |
598 | return ret; | |
599 | } | |
600 | ||
601 | extern unsigned long do_mremap(unsigned long addr, | |
602 | unsigned long old_len, unsigned long new_len, | |
603 | unsigned long flags, unsigned long new_addr); | |
604 | ||
605 | asmlinkage unsigned long sys64_mremap(unsigned long addr, | |
606 | unsigned long old_len, unsigned long new_len, | |
607 | unsigned long flags, unsigned long new_addr) | |
608 | { | |
609 | struct vm_area_struct *vma; | |
610 | unsigned long ret = -EINVAL; | |
8bcd1741 | 611 | |
1da177e4 LT |
612 | if (test_thread_flag(TIF_32BIT)) |
613 | goto out; | |
8bcd1741 | 614 | if (unlikely(new_len >= VA_EXCLUDE_START)) |
1da177e4 | 615 | goto out; |
8bcd1741 | 616 | if (unlikely(invalid_64bit_range(addr, old_len))) |
1da177e4 | 617 | goto out; |
8bcd1741 | 618 | |
1da177e4 LT |
619 | down_write(¤t->mm->mmap_sem); |
620 | if (flags & MREMAP_FIXED) { | |
8bcd1741 | 621 | if (invalid_64bit_range(new_addr, new_len)) |
1da177e4 | 622 | goto out_sem; |
8bcd1741 | 623 | } else if (invalid_64bit_range(addr, new_len)) { |
1da177e4 LT |
624 | unsigned long map_flags = 0; |
625 | struct file *file = NULL; | |
626 | ||
627 | ret = -ENOMEM; | |
628 | if (!(flags & MREMAP_MAYMOVE)) | |
629 | goto out_sem; | |
630 | ||
631 | vma = find_vma(current->mm, addr); | |
632 | if (vma) { | |
633 | if (vma->vm_flags & VM_SHARED) | |
634 | map_flags |= MAP_SHARED; | |
635 | file = vma->vm_file; | |
636 | } | |
637 | ||
638 | /* MREMAP_FIXED checked above. */ | |
639 | new_addr = get_unmapped_area(file, addr, new_len, | |
640 | vma ? vma->vm_pgoff : 0, | |
641 | map_flags); | |
642 | ret = new_addr; | |
643 | if (new_addr & ~PAGE_MASK) | |
644 | goto out_sem; | |
645 | flags |= MREMAP_FIXED; | |
646 | } | |
647 | ret = do_mremap(addr, old_len, new_len, flags, new_addr); | |
648 | out_sem: | |
649 | up_write(¤t->mm->mmap_sem); | |
650 | out: | |
651 | return ret; | |
652 | } | |
653 | ||
654 | /* we come to here via sys_nis_syscall so it can setup the regs argument */ | |
655 | asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs) | |
656 | { | |
657 | static int count; | |
658 | ||
659 | /* Don't make the system unusable, if someone goes stuck */ | |
660 | if (count++ > 5) | |
661 | return -ENOSYS; | |
662 | ||
663 | printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]); | |
664 | #ifdef DEBUG_UNIMP_SYSCALL | |
665 | show_regs (regs); | |
666 | #endif | |
667 | ||
668 | return -ENOSYS; | |
669 | } | |
670 | ||
671 | /* #define DEBUG_SPARC_BREAKPOINT */ | |
672 | ||
673 | asmlinkage void sparc_breakpoint(struct pt_regs *regs) | |
674 | { | |
675 | siginfo_t info; | |
676 | ||
677 | if (test_thread_flag(TIF_32BIT)) { | |
678 | regs->tpc &= 0xffffffff; | |
679 | regs->tnpc &= 0xffffffff; | |
680 | } | |
681 | #ifdef DEBUG_SPARC_BREAKPOINT | |
682 | printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc); | |
683 | #endif | |
684 | info.si_signo = SIGTRAP; | |
685 | info.si_errno = 0; | |
686 | info.si_code = TRAP_BRKPT; | |
687 | info.si_addr = (void __user *)regs->tpc; | |
688 | info.si_trapno = 0; | |
689 | force_sig_info(SIGTRAP, &info, current); | |
690 | #ifdef DEBUG_SPARC_BREAKPOINT | |
691 | printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc); | |
692 | #endif | |
693 | } | |
694 | ||
695 | extern void check_pending(int signum); | |
696 | ||
697 | asmlinkage long sys_getdomainname(char __user *name, int len) | |
698 | { | |
8310a32c DM |
699 | int nlen, err; |
700 | ||
b9c54f91 | 701 | if (len < 0) |
8310a32c | 702 | return -EINVAL; |
1da177e4 LT |
703 | |
704 | down_read(&uts_sem); | |
705 | ||
e9ff3990 | 706 | nlen = strlen(utsname()->domainname) + 1; |
b9c54f91 AW |
707 | err = -EINVAL; |
708 | if (nlen > len) | |
709 | goto out; | |
8310a32c DM |
710 | |
711 | err = -EFAULT; | |
e9ff3990 | 712 | if (!copy_to_user(name, utsname()->domainname, nlen)) |
8310a32c DM |
713 | err = 0; |
714 | ||
b9c54f91 | 715 | out: |
1da177e4 LT |
716 | up_read(&uts_sem); |
717 | return err; | |
718 | } | |
719 | ||
720 | asmlinkage long solaris_syscall(struct pt_regs *regs) | |
721 | { | |
722 | static int count; | |
723 | ||
724 | regs->tpc = regs->tnpc; | |
725 | regs->tnpc += 4; | |
726 | if (test_thread_flag(TIF_32BIT)) { | |
727 | regs->tpc &= 0xffffffff; | |
728 | regs->tnpc &= 0xffffffff; | |
729 | } | |
730 | if (++count <= 5) { | |
731 | printk ("For Solaris binary emulation you need solaris module loaded\n"); | |
732 | show_regs (regs); | |
733 | } | |
734 | send_sig(SIGSEGV, current, 1); | |
735 | ||
736 | return -ENOSYS; | |
737 | } | |
738 | ||
739 | #ifndef CONFIG_SUNOS_EMUL | |
740 | asmlinkage long sunos_syscall(struct pt_regs *regs) | |
741 | { | |
742 | static int count; | |
743 | ||
744 | regs->tpc = regs->tnpc; | |
745 | regs->tnpc += 4; | |
746 | if (test_thread_flag(TIF_32BIT)) { | |
747 | regs->tpc &= 0xffffffff; | |
748 | regs->tnpc &= 0xffffffff; | |
749 | } | |
750 | if (++count <= 20) | |
751 | printk ("SunOS binary emulation not compiled in\n"); | |
752 | force_sig(SIGSEGV, current); | |
753 | ||
754 | return -ENOSYS; | |
755 | } | |
756 | #endif | |
757 | ||
758 | asmlinkage long sys_utrap_install(utrap_entry_t type, | |
759 | utrap_handler_t new_p, | |
760 | utrap_handler_t new_d, | |
761 | utrap_handler_t __user *old_p, | |
762 | utrap_handler_t __user *old_d) | |
763 | { | |
764 | if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31) | |
765 | return -EINVAL; | |
766 | if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) { | |
767 | if (old_p) { | |
768 | if (!current_thread_info()->utraps) { | |
769 | if (put_user(NULL, old_p)) | |
770 | return -EFAULT; | |
771 | } else { | |
772 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
773 | return -EFAULT; | |
774 | } | |
775 | } | |
776 | if (old_d) { | |
777 | if (put_user(NULL, old_d)) | |
778 | return -EFAULT; | |
779 | } | |
780 | return 0; | |
781 | } | |
782 | if (!current_thread_info()->utraps) { | |
783 | current_thread_info()->utraps = | |
9132983a | 784 | kzalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL); |
1da177e4 LT |
785 | if (!current_thread_info()->utraps) |
786 | return -ENOMEM; | |
787 | current_thread_info()->utraps[0] = 1; | |
1da177e4 LT |
788 | } else { |
789 | if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p && | |
790 | current_thread_info()->utraps[0] > 1) { | |
791 | long *p = current_thread_info()->utraps; | |
792 | ||
793 | current_thread_info()->utraps = | |
794 | kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), | |
795 | GFP_KERNEL); | |
796 | if (!current_thread_info()->utraps) { | |
797 | current_thread_info()->utraps = p; | |
798 | return -ENOMEM; | |
799 | } | |
800 | p[0]--; | |
801 | current_thread_info()->utraps[0] = 1; | |
802 | memcpy(current_thread_info()->utraps+1, p+1, | |
803 | UT_TRAP_INSTRUCTION_31*sizeof(long)); | |
804 | } | |
805 | } | |
806 | if (old_p) { | |
807 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
808 | return -EFAULT; | |
809 | } | |
810 | if (old_d) { | |
811 | if (put_user(NULL, old_d)) | |
812 | return -EFAULT; | |
813 | } | |
814 | current_thread_info()->utraps[type] = (long)new_p; | |
815 | ||
816 | return 0; | |
817 | } | |
818 | ||
819 | long sparc_memory_ordering(unsigned long model, struct pt_regs *regs) | |
820 | { | |
821 | if (model >= 3) | |
822 | return -EINVAL; | |
823 | regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14); | |
824 | return 0; | |
825 | } | |
826 | ||
827 | asmlinkage long sys_rt_sigaction(int sig, | |
828 | const struct sigaction __user *act, | |
829 | struct sigaction __user *oact, | |
830 | void __user *restorer, | |
831 | size_t sigsetsize) | |
832 | { | |
833 | struct k_sigaction new_ka, old_ka; | |
834 | int ret; | |
835 | ||
836 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
837 | if (sigsetsize != sizeof(sigset_t)) | |
838 | return -EINVAL; | |
839 | ||
840 | if (act) { | |
841 | new_ka.ka_restorer = restorer; | |
842 | if (copy_from_user(&new_ka.sa, act, sizeof(*act))) | |
843 | return -EFAULT; | |
844 | } | |
845 | ||
846 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
847 | ||
848 | if (!ret && oact) { | |
849 | if (copy_to_user(oact, &old_ka.sa, sizeof(*oact))) | |
850 | return -EFAULT; | |
851 | } | |
852 | ||
853 | return ret; | |
854 | } | |
855 | ||
856 | /* Invoked by rtrap code to update performance counters in | |
857 | * user space. | |
858 | */ | |
859 | asmlinkage void update_perfctrs(void) | |
860 | { | |
861 | unsigned long pic, tmp; | |
862 | ||
863 | read_pic(pic); | |
864 | tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic); | |
865 | __put_user(tmp, current_thread_info()->user_cntd0); | |
866 | tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32)); | |
867 | __put_user(tmp, current_thread_info()->user_cntd1); | |
868 | reset_pic(); | |
869 | } | |
870 | ||
871 | asmlinkage long sys_perfctr(int opcode, unsigned long arg0, unsigned long arg1, unsigned long arg2) | |
872 | { | |
873 | int err = 0; | |
874 | ||
875 | switch(opcode) { | |
876 | case PERFCTR_ON: | |
877 | current_thread_info()->pcr_reg = arg2; | |
878 | current_thread_info()->user_cntd0 = (u64 __user *) arg0; | |
879 | current_thread_info()->user_cntd1 = (u64 __user *) arg1; | |
880 | current_thread_info()->kernel_cntd0 = | |
881 | current_thread_info()->kernel_cntd1 = 0; | |
882 | write_pcr(arg2); | |
883 | reset_pic(); | |
884 | set_thread_flag(TIF_PERFCTR); | |
885 | break; | |
886 | ||
887 | case PERFCTR_OFF: | |
888 | err = -EINVAL; | |
889 | if (test_thread_flag(TIF_PERFCTR)) { | |
890 | current_thread_info()->user_cntd0 = | |
891 | current_thread_info()->user_cntd1 = NULL; | |
892 | current_thread_info()->pcr_reg = 0; | |
893 | write_pcr(0); | |
894 | clear_thread_flag(TIF_PERFCTR); | |
895 | err = 0; | |
896 | } | |
897 | break; | |
898 | ||
899 | case PERFCTR_READ: { | |
900 | unsigned long pic, tmp; | |
901 | ||
902 | if (!test_thread_flag(TIF_PERFCTR)) { | |
903 | err = -EINVAL; | |
904 | break; | |
905 | } | |
906 | read_pic(pic); | |
907 | tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic); | |
908 | err |= __put_user(tmp, current_thread_info()->user_cntd0); | |
909 | tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32)); | |
910 | err |= __put_user(tmp, current_thread_info()->user_cntd1); | |
911 | reset_pic(); | |
912 | break; | |
913 | } | |
914 | ||
915 | case PERFCTR_CLRPIC: | |
916 | if (!test_thread_flag(TIF_PERFCTR)) { | |
917 | err = -EINVAL; | |
918 | break; | |
919 | } | |
920 | current_thread_info()->kernel_cntd0 = | |
921 | current_thread_info()->kernel_cntd1 = 0; | |
922 | reset_pic(); | |
923 | break; | |
924 | ||
925 | case PERFCTR_SETPCR: { | |
926 | u64 __user *user_pcr = (u64 __user *)arg0; | |
927 | ||
928 | if (!test_thread_flag(TIF_PERFCTR)) { | |
929 | err = -EINVAL; | |
930 | break; | |
931 | } | |
932 | err |= __get_user(current_thread_info()->pcr_reg, user_pcr); | |
933 | write_pcr(current_thread_info()->pcr_reg); | |
934 | current_thread_info()->kernel_cntd0 = | |
935 | current_thread_info()->kernel_cntd1 = 0; | |
936 | reset_pic(); | |
937 | break; | |
938 | } | |
939 | ||
940 | case PERFCTR_GETPCR: { | |
941 | u64 __user *user_pcr = (u64 __user *)arg0; | |
942 | ||
943 | if (!test_thread_flag(TIF_PERFCTR)) { | |
944 | err = -EINVAL; | |
945 | break; | |
946 | } | |
947 | err |= __put_user(current_thread_info()->pcr_reg, user_pcr); | |
948 | break; | |
949 | } | |
950 | ||
951 | default: | |
952 | err = -EINVAL; | |
953 | break; | |
954 | }; | |
955 | return err; | |
956 | } | |
fe74290d AB |
957 | |
958 | /* | |
959 | * Do a system call from kernel instead of calling sys_execve so we | |
960 | * end up with proper pt_regs. | |
961 | */ | |
962 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) | |
963 | { | |
964 | long __res; | |
965 | register long __g1 __asm__ ("g1") = __NR_execve; | |
966 | register long __o0 __asm__ ("o0") = (long)(filename); | |
967 | register long __o1 __asm__ ("o1") = (long)(argv); | |
968 | register long __o2 __asm__ ("o2") = (long)(envp); | |
969 | asm volatile ("t 0x6d\n\t" | |
970 | "sub %%g0, %%o0, %0\n\t" | |
971 | "movcc %%xcc, %%o0, %0\n\t" | |
972 | : "=r" (__res), "=&r" (__o0) | |
973 | : "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1) | |
974 | : "cc"); | |
975 | return __res; | |
976 | } |