Commit | Line | Data |
---|---|---|
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> |
fe74290d | 34 | #include <asm/unistd.h> |
1da177e4 LT |
35 | |
36 | /* #define DEBUG_UNIMP_SYSCALL */ | |
37 | ||
1da177e4 LT |
38 | asmlinkage unsigned long sys_getpagesize(void) |
39 | { | |
40 | return PAGE_SIZE; | |
41 | } | |
42 | ||
8bcd1741 DM |
43 | #define VA_EXCLUDE_START (0x0000080000000000UL - (1UL << 32UL)) |
44 | #define VA_EXCLUDE_END (0xfffff80000000000UL + (1UL << 32UL)) | |
45 | ||
46 | /* Does addr --> addr+len fall within 4GB of the VA-space hole or | |
47 | * overflow past the end of the 64-bit address space? | |
48 | */ | |
49 | static inline int invalid_64bit_range(unsigned long addr, unsigned long len) | |
50 | { | |
51 | unsigned long va_exclude_start, va_exclude_end; | |
52 | ||
53 | va_exclude_start = VA_EXCLUDE_START; | |
54 | va_exclude_end = VA_EXCLUDE_END; | |
55 | ||
56 | if (unlikely(len >= va_exclude_start)) | |
57 | return 1; | |
58 | ||
59 | if (unlikely((addr + len) < addr)) | |
60 | return 1; | |
61 | ||
62 | if (unlikely((addr >= va_exclude_start && addr < va_exclude_end) || | |
63 | ((addr + len) >= va_exclude_start && | |
64 | (addr + len) < va_exclude_end))) | |
65 | return 1; | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | /* Does start,end straddle the VA-space hole? */ | |
71 | static inline int straddles_64bit_va_hole(unsigned long start, unsigned long end) | |
72 | { | |
73 | unsigned long va_exclude_start, va_exclude_end; | |
74 | ||
75 | va_exclude_start = VA_EXCLUDE_START; | |
76 | va_exclude_end = VA_EXCLUDE_END; | |
77 | ||
78 | if (likely(start < va_exclude_start && end < va_exclude_start)) | |
79 | return 0; | |
80 | ||
81 | if (likely(start >= va_exclude_end && end >= va_exclude_end)) | |
82 | return 0; | |
83 | ||
84 | return 1; | |
85 | } | |
86 | ||
a91690dd DM |
87 | /* These functions differ from the default implementations in |
88 | * mm/mmap.c in two ways: | |
89 | * | |
90 | * 1) For file backed MAP_SHARED mmap()'s we D-cache color align, | |
91 | * for fixed such mappings we just validate what the user gave us. | |
92 | * 2) For 64-bit tasks we avoid mapping anything within 4GB of | |
93 | * the spitfire/niagara VA-hole. | |
94 | */ | |
95 | ||
96 | static inline unsigned long COLOUR_ALIGN(unsigned long addr, | |
97 | unsigned long pgoff) | |
98 | { | |
99 | unsigned long base = (addr+SHMLBA-1)&~(SHMLBA-1); | |
100 | unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1); | |
101 | ||
102 | return base + off; | |
103 | } | |
104 | ||
105 | static inline unsigned long COLOUR_ALIGN_DOWN(unsigned long addr, | |
106 | unsigned long pgoff) | |
107 | { | |
108 | unsigned long base = addr & ~(SHMLBA-1); | |
109 | unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1); | |
110 | ||
111 | if (base + off <= addr) | |
112 | return base + off; | |
113 | return base - off; | |
114 | } | |
1da177e4 LT |
115 | |
116 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) | |
117 | { | |
118 | struct mm_struct *mm = current->mm; | |
119 | struct vm_area_struct * vma; | |
120 | unsigned long task_size = TASK_SIZE; | |
121 | unsigned long start_addr; | |
122 | int do_color_align; | |
123 | ||
124 | if (flags & MAP_FIXED) { | |
125 | /* We do not accept a shared mapping if it would violate | |
126 | * cache aliasing constraints. | |
127 | */ | |
128 | if ((flags & MAP_SHARED) && | |
129 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
130 | return -EINVAL; | |
131 | return addr; | |
132 | } | |
133 | ||
134 | if (test_thread_flag(TIF_32BIT)) | |
d61e16df | 135 | task_size = STACK_TOP32; |
a91690dd | 136 | if (unlikely(len > task_size || len >= VA_EXCLUDE_START)) |
1da177e4 LT |
137 | return -ENOMEM; |
138 | ||
139 | do_color_align = 0; | |
140 | if (filp || (flags & MAP_SHARED)) | |
141 | do_color_align = 1; | |
142 | ||
143 | if (addr) { | |
144 | if (do_color_align) | |
145 | addr = COLOUR_ALIGN(addr, pgoff); | |
146 | else | |
147 | addr = PAGE_ALIGN(addr); | |
148 | ||
149 | vma = find_vma(mm, addr); | |
150 | if (task_size - len >= addr && | |
151 | (!vma || addr + len <= vma->vm_start)) | |
152 | return addr; | |
153 | } | |
154 | ||
a91690dd DM |
155 | if (len > mm->cached_hole_size) { |
156 | start_addr = addr = mm->free_area_cache; | |
157 | } else { | |
158 | start_addr = addr = TASK_UNMAPPED_BASE; | |
1363c3cd | 159 | mm->cached_hole_size = 0; |
1363c3cd | 160 | } |
1da177e4 LT |
161 | |
162 | task_size -= len; | |
163 | ||
164 | full_search: | |
165 | if (do_color_align) | |
166 | addr = COLOUR_ALIGN(addr, pgoff); | |
167 | else | |
168 | addr = PAGE_ALIGN(addr); | |
169 | ||
170 | for (vma = find_vma(mm, addr); ; vma = vma->vm_next) { | |
171 | /* At this point: (!vma || addr < vma->vm_end). */ | |
8bcd1741 DM |
172 | if (addr < VA_EXCLUDE_START && |
173 | (addr + len) >= VA_EXCLUDE_START) { | |
174 | addr = VA_EXCLUDE_END; | |
175 | vma = find_vma(mm, VA_EXCLUDE_END); | |
1da177e4 | 176 | } |
a91690dd | 177 | if (unlikely(task_size < addr)) { |
1da177e4 LT |
178 | if (start_addr != TASK_UNMAPPED_BASE) { |
179 | start_addr = addr = TASK_UNMAPPED_BASE; | |
1363c3cd | 180 | mm->cached_hole_size = 0; |
1da177e4 LT |
181 | goto full_search; |
182 | } | |
183 | return -ENOMEM; | |
184 | } | |
a91690dd | 185 | if (likely(!vma || addr + len <= vma->vm_start)) { |
1da177e4 LT |
186 | /* |
187 | * Remember the place where we stopped the search: | |
188 | */ | |
189 | mm->free_area_cache = addr + len; | |
190 | return addr; | |
191 | } | |
1363c3cd WW |
192 | if (addr + mm->cached_hole_size < vma->vm_start) |
193 | mm->cached_hole_size = vma->vm_start - addr; | |
194 | ||
1da177e4 LT |
195 | addr = vma->vm_end; |
196 | if (do_color_align) | |
197 | addr = COLOUR_ALIGN(addr, pgoff); | |
198 | } | |
199 | } | |
200 | ||
a91690dd DM |
201 | unsigned long |
202 | arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, | |
203 | const unsigned long len, const unsigned long pgoff, | |
204 | const unsigned long flags) | |
205 | { | |
206 | struct vm_area_struct *vma; | |
207 | struct mm_struct *mm = current->mm; | |
d61e16df | 208 | unsigned long task_size = STACK_TOP32; |
a91690dd DM |
209 | unsigned long addr = addr0; |
210 | int do_color_align; | |
211 | ||
212 | /* This should only ever run for 32-bit processes. */ | |
213 | BUG_ON(!test_thread_flag(TIF_32BIT)); | |
214 | ||
215 | if (flags & MAP_FIXED) { | |
216 | /* We do not accept a shared mapping if it would violate | |
217 | * cache aliasing constraints. | |
218 | */ | |
219 | if ((flags & MAP_SHARED) && | |
220 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
221 | return -EINVAL; | |
222 | return addr; | |
223 | } | |
224 | ||
225 | if (unlikely(len > task_size)) | |
226 | return -ENOMEM; | |
227 | ||
228 | do_color_align = 0; | |
229 | if (filp || (flags & MAP_SHARED)) | |
230 | do_color_align = 1; | |
231 | ||
232 | /* requesting a specific address */ | |
233 | if (addr) { | |
234 | if (do_color_align) | |
235 | addr = COLOUR_ALIGN(addr, pgoff); | |
236 | else | |
237 | addr = PAGE_ALIGN(addr); | |
238 | ||
239 | vma = find_vma(mm, addr); | |
240 | if (task_size - len >= addr && | |
241 | (!vma || addr + len <= vma->vm_start)) | |
242 | return addr; | |
243 | } | |
244 | ||
245 | /* check if free_area_cache is useful for us */ | |
246 | if (len <= mm->cached_hole_size) { | |
247 | mm->cached_hole_size = 0; | |
248 | mm->free_area_cache = mm->mmap_base; | |
249 | } | |
250 | ||
251 | /* either no address requested or can't fit in requested address hole */ | |
252 | addr = mm->free_area_cache; | |
253 | if (do_color_align) { | |
254 | unsigned long base = COLOUR_ALIGN_DOWN(addr-len, pgoff); | |
255 | ||
256 | addr = base + len; | |
257 | } | |
258 | ||
259 | /* make sure it can fit in the remaining address space */ | |
260 | if (likely(addr > len)) { | |
261 | vma = find_vma(mm, addr-len); | |
262 | if (!vma || addr <= vma->vm_start) { | |
263 | /* remember the address as a hint for next time */ | |
264 | return (mm->free_area_cache = addr-len); | |
265 | } | |
266 | } | |
267 | ||
268 | if (unlikely(mm->mmap_base < len)) | |
269 | goto bottomup; | |
270 | ||
271 | addr = mm->mmap_base-len; | |
272 | if (do_color_align) | |
273 | addr = COLOUR_ALIGN_DOWN(addr, pgoff); | |
274 | ||
275 | do { | |
276 | /* | |
277 | * Lookup failure means no vma is above this address, | |
278 | * else if new region fits below vma->vm_start, | |
279 | * return with success: | |
280 | */ | |
281 | vma = find_vma(mm, addr); | |
282 | if (likely(!vma || addr+len <= vma->vm_start)) { | |
283 | /* remember the address as a hint for next time */ | |
284 | return (mm->free_area_cache = addr); | |
285 | } | |
286 | ||
287 | /* remember the largest hole we saw so far */ | |
288 | if (addr + mm->cached_hole_size < vma->vm_start) | |
289 | mm->cached_hole_size = vma->vm_start - addr; | |
290 | ||
291 | /* try just below the current vma->vm_start */ | |
292 | addr = vma->vm_start-len; | |
293 | if (do_color_align) | |
294 | addr = COLOUR_ALIGN_DOWN(addr, pgoff); | |
295 | } while (likely(len < vma->vm_start)); | |
296 | ||
297 | bottomup: | |
298 | /* | |
299 | * A failed mmap() very likely causes application failure, | |
300 | * so fall back to the bottom-up function here. This scenario | |
301 | * can happen with large stack limits and large mmap() | |
302 | * allocations. | |
303 | */ | |
304 | mm->cached_hole_size = ~0UL; | |
305 | mm->free_area_cache = TASK_UNMAPPED_BASE; | |
306 | addr = arch_get_unmapped_area(filp, addr0, len, pgoff, flags); | |
307 | /* | |
308 | * Restore the topdown base: | |
309 | */ | |
310 | mm->free_area_cache = mm->mmap_base; | |
311 | mm->cached_hole_size = ~0UL; | |
312 | ||
313 | return addr; | |
314 | } | |
315 | ||
1da177e4 LT |
316 | /* Try to align mapping such that we align it as much as possible. */ |
317 | unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags) | |
318 | { | |
319 | unsigned long align_goal, addr = -ENOMEM; | |
320 | ||
321 | if (flags & MAP_FIXED) { | |
322 | /* Ok, don't mess with it. */ | |
323 | return get_unmapped_area(NULL, addr, len, pgoff, flags); | |
324 | } | |
325 | flags &= ~MAP_SHARED; | |
326 | ||
327 | align_goal = PAGE_SIZE; | |
328 | if (len >= (4UL * 1024 * 1024)) | |
329 | align_goal = (4UL * 1024 * 1024); | |
330 | else if (len >= (512UL * 1024)) | |
331 | align_goal = (512UL * 1024); | |
332 | else if (len >= (64UL * 1024)) | |
333 | align_goal = (64UL * 1024); | |
334 | ||
335 | do { | |
336 | addr = get_unmapped_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags); | |
337 | if (!(addr & ~PAGE_MASK)) { | |
338 | addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL); | |
339 | break; | |
340 | } | |
341 | ||
342 | if (align_goal == (4UL * 1024 * 1024)) | |
343 | align_goal = (512UL * 1024); | |
344 | else if (align_goal == (512UL * 1024)) | |
345 | align_goal = (64UL * 1024); | |
346 | else | |
347 | align_goal = PAGE_SIZE; | |
348 | } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE); | |
349 | ||
350 | /* Mapping is smaller than 64K or larger areas could not | |
351 | * be obtained. | |
352 | */ | |
353 | if (addr & ~PAGE_MASK) | |
354 | addr = get_unmapped_area(NULL, orig_addr, len, pgoff, flags); | |
355 | ||
356 | return addr; | |
357 | } | |
358 | ||
a91690dd DM |
359 | /* Essentially the same as PowerPC... */ |
360 | void arch_pick_mmap_layout(struct mm_struct *mm) | |
361 | { | |
05f9ca83 DM |
362 | unsigned long random_factor = 0UL; |
363 | ||
364 | if (current->flags & PF_RANDOMIZE) { | |
365 | random_factor = get_random_int(); | |
366 | if (test_thread_flag(TIF_32BIT)) | |
367 | random_factor &= ((1 * 1024 * 1024) - 1); | |
368 | else | |
369 | random_factor = ((random_factor << PAGE_SHIFT) & | |
370 | 0xffffffffUL); | |
371 | } | |
372 | ||
a91690dd DM |
373 | /* |
374 | * Fall back to the standard layout if the personality | |
375 | * bit is set, or if the expected stack growth is unlimited: | |
376 | */ | |
377 | if (!test_thread_flag(TIF_32BIT) || | |
378 | (current->personality & ADDR_COMPAT_LAYOUT) || | |
379 | current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY || | |
380 | sysctl_legacy_va_layout) { | |
05f9ca83 | 381 | mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; |
a91690dd DM |
382 | mm->get_unmapped_area = arch_get_unmapped_area; |
383 | mm->unmap_area = arch_unmap_area; | |
384 | } else { | |
385 | /* We know it's 32-bit */ | |
d61e16df | 386 | unsigned long task_size = STACK_TOP32; |
a91690dd DM |
387 | unsigned long gap; |
388 | ||
389 | gap = current->signal->rlim[RLIMIT_STACK].rlim_cur; | |
390 | if (gap < 128 * 1024 * 1024) | |
391 | gap = 128 * 1024 * 1024; | |
392 | if (gap > (task_size / 6 * 5)) | |
393 | gap = (task_size / 6 * 5); | |
394 | ||
05f9ca83 | 395 | mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor); |
a91690dd DM |
396 | mm->get_unmapped_area = arch_get_unmapped_area_topdown; |
397 | mm->unmap_area = arch_unmap_area_topdown; | |
398 | } | |
399 | } | |
400 | ||
1da177e4 LT |
401 | asmlinkage unsigned long sparc_brk(unsigned long brk) |
402 | { | |
403 | /* People could try to be nasty and use ta 0x6d in 32bit programs */ | |
d61e16df | 404 | if (test_thread_flag(TIF_32BIT) && brk >= STACK_TOP32) |
1da177e4 LT |
405 | return current->mm->brk; |
406 | ||
8bcd1741 | 407 | if (unlikely(straddles_64bit_va_hole(current->mm->brk, brk))) |
1da177e4 | 408 | return current->mm->brk; |
8bcd1741 | 409 | |
1da177e4 LT |
410 | return sys_brk(brk); |
411 | } | |
412 | ||
413 | /* | |
414 | * sys_pipe() is the normal C calling standard for creating | |
415 | * a pipe. It's not the way unix traditionally does this, though. | |
416 | */ | |
417 | asmlinkage long sparc_pipe(struct pt_regs *regs) | |
418 | { | |
419 | int fd[2]; | |
420 | int error; | |
421 | ||
422 | error = do_pipe(fd); | |
423 | if (error) | |
424 | goto out; | |
425 | regs->u_regs[UREG_I1] = fd[1]; | |
426 | error = fd[0]; | |
427 | out: | |
428 | return error; | |
429 | } | |
430 | ||
431 | /* | |
432 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
433 | * | |
434 | * This is really horribly ugly. | |
435 | */ | |
436 | ||
437 | asmlinkage long sys_ipc(unsigned int call, int first, unsigned long second, | |
438 | unsigned long third, void __user *ptr, long fifth) | |
439 | { | |
440 | int err; | |
441 | ||
442 | /* No need for backward compatibility. We can start fresh... */ | |
443 | if (call <= SEMCTL) { | |
444 | switch (call) { | |
445 | case SEMOP: | |
446 | err = sys_semtimedop(first, ptr, | |
447 | (unsigned)second, NULL); | |
448 | goto out; | |
449 | case SEMTIMEDOP: | |
450 | err = sys_semtimedop(first, ptr, (unsigned)second, | |
451 | (const struct timespec __user *) fifth); | |
452 | goto out; | |
453 | case SEMGET: | |
454 | err = sys_semget(first, (int)second, (int)third); | |
455 | goto out; | |
456 | case SEMCTL: { | |
457 | union semun fourth; | |
458 | err = -EINVAL; | |
459 | if (!ptr) | |
460 | goto out; | |
461 | err = -EFAULT; | |
462 | if (get_user(fourth.__pad, | |
463 | (void __user * __user *) ptr)) | |
464 | goto out; | |
465 | err = sys_semctl(first, (int)second | IPC_64, | |
466 | (int)third, fourth); | |
467 | goto out; | |
468 | } | |
469 | default: | |
470 | err = -ENOSYS; | |
471 | goto out; | |
472 | }; | |
473 | } | |
474 | if (call <= MSGCTL) { | |
475 | switch (call) { | |
476 | case MSGSND: | |
477 | err = sys_msgsnd(first, ptr, (size_t)second, | |
478 | (int)third); | |
479 | goto out; | |
480 | case MSGRCV: | |
481 | err = sys_msgrcv(first, ptr, (size_t)second, fifth, | |
482 | (int)third); | |
483 | goto out; | |
484 | case MSGGET: | |
485 | err = sys_msgget((key_t)first, (int)second); | |
486 | goto out; | |
487 | case MSGCTL: | |
488 | err = sys_msgctl(first, (int)second | IPC_64, ptr); | |
489 | goto out; | |
490 | default: | |
491 | err = -ENOSYS; | |
492 | goto out; | |
493 | }; | |
494 | } | |
495 | if (call <= SHMCTL) { | |
496 | switch (call) { | |
497 | case SHMAT: { | |
498 | ulong raddr; | |
499 | err = do_shmat(first, ptr, (int)second, &raddr); | |
500 | if (!err) { | |
501 | if (put_user(raddr, | |
502 | (ulong __user *) third)) | |
503 | err = -EFAULT; | |
504 | } | |
505 | goto out; | |
506 | } | |
507 | case SHMDT: | |
508 | err = sys_shmdt(ptr); | |
509 | goto out; | |
510 | case SHMGET: | |
511 | err = sys_shmget(first, (size_t)second, (int)third); | |
512 | goto out; | |
513 | case SHMCTL: | |
514 | err = sys_shmctl(first, (int)second | IPC_64, ptr); | |
515 | goto out; | |
516 | default: | |
517 | err = -ENOSYS; | |
518 | goto out; | |
519 | }; | |
520 | } else { | |
521 | err = -ENOSYS; | |
522 | } | |
523 | out: | |
524 | return err; | |
525 | } | |
526 | ||
527 | asmlinkage long sparc64_newuname(struct new_utsname __user *name) | |
528 | { | |
529 | int ret = sys_newuname(name); | |
530 | ||
531 | if (current->personality == PER_LINUX32 && !ret) { | |
532 | ret = (copy_to_user(name->machine, "sparc\0\0", 8) | |
533 | ? -EFAULT : 0); | |
534 | } | |
535 | return ret; | |
536 | } | |
537 | ||
538 | asmlinkage long sparc64_personality(unsigned long personality) | |
539 | { | |
540 | int ret; | |
541 | ||
542 | if (current->personality == PER_LINUX32 && | |
543 | personality == PER_LINUX) | |
544 | personality = PER_LINUX32; | |
545 | ret = sys_personality(personality); | |
546 | if (ret == PER_LINUX32) | |
547 | ret = PER_LINUX; | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
3a459756 KK |
552 | int sparc64_mmap_check(unsigned long addr, unsigned long len, |
553 | unsigned long flags) | |
554 | { | |
555 | if (test_thread_flag(TIF_32BIT)) { | |
556 | if (len >= STACK_TOP32) | |
557 | return -EINVAL; | |
558 | ||
559 | if ((flags & MAP_FIXED) && addr > STACK_TOP32 - len) | |
560 | return -EINVAL; | |
561 | } else { | |
562 | if (len >= VA_EXCLUDE_START) | |
563 | return -EINVAL; | |
564 | ||
565 | if ((flags & MAP_FIXED) && invalid_64bit_range(addr, len)) | |
566 | return -EINVAL; | |
567 | } | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
1da177e4 LT |
572 | /* Linux version of mmap */ |
573 | asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, | |
574 | unsigned long prot, unsigned long flags, unsigned long fd, | |
575 | unsigned long off) | |
576 | { | |
577 | struct file * file = NULL; | |
578 | unsigned long retval = -EBADF; | |
579 | ||
580 | if (!(flags & MAP_ANONYMOUS)) { | |
581 | file = fget(fd); | |
582 | if (!file) | |
583 | goto out; | |
584 | } | |
585 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
586 | len = PAGE_ALIGN(len); | |
1da177e4 LT |
587 | |
588 | down_write(¤t->mm->mmap_sem); | |
589 | retval = do_mmap(file, addr, len, prot, flags, off); | |
590 | up_write(¤t->mm->mmap_sem); | |
591 | ||
1da177e4 LT |
592 | if (file) |
593 | fput(file); | |
594 | out: | |
595 | return retval; | |
596 | } | |
597 | ||
598 | asmlinkage long sys64_munmap(unsigned long addr, size_t len) | |
599 | { | |
600 | long ret; | |
601 | ||
8bcd1741 | 602 | if (invalid_64bit_range(addr, len)) |
1da177e4 | 603 | return -EINVAL; |
8bcd1741 | 604 | |
1da177e4 LT |
605 | down_write(¤t->mm->mmap_sem); |
606 | ret = do_munmap(current->mm, addr, len); | |
607 | up_write(¤t->mm->mmap_sem); | |
608 | return ret; | |
609 | } | |
610 | ||
611 | extern unsigned long do_mremap(unsigned long addr, | |
612 | unsigned long old_len, unsigned long new_len, | |
613 | unsigned long flags, unsigned long new_addr); | |
614 | ||
615 | asmlinkage unsigned long sys64_mremap(unsigned long addr, | |
616 | unsigned long old_len, unsigned long new_len, | |
617 | unsigned long flags, unsigned long new_addr) | |
618 | { | |
619 | struct vm_area_struct *vma; | |
620 | unsigned long ret = -EINVAL; | |
8bcd1741 | 621 | |
1da177e4 LT |
622 | if (test_thread_flag(TIF_32BIT)) |
623 | goto out; | |
8bcd1741 | 624 | if (unlikely(new_len >= VA_EXCLUDE_START)) |
1da177e4 | 625 | goto out; |
8bcd1741 | 626 | if (unlikely(invalid_64bit_range(addr, old_len))) |
1da177e4 | 627 | goto out; |
8bcd1741 | 628 | |
1da177e4 LT |
629 | down_write(¤t->mm->mmap_sem); |
630 | if (flags & MREMAP_FIXED) { | |
8bcd1741 | 631 | if (invalid_64bit_range(new_addr, new_len)) |
1da177e4 | 632 | goto out_sem; |
8bcd1741 | 633 | } else if (invalid_64bit_range(addr, new_len)) { |
1da177e4 LT |
634 | unsigned long map_flags = 0; |
635 | struct file *file = NULL; | |
636 | ||
637 | ret = -ENOMEM; | |
638 | if (!(flags & MREMAP_MAYMOVE)) | |
639 | goto out_sem; | |
640 | ||
641 | vma = find_vma(current->mm, addr); | |
642 | if (vma) { | |
643 | if (vma->vm_flags & VM_SHARED) | |
644 | map_flags |= MAP_SHARED; | |
645 | file = vma->vm_file; | |
646 | } | |
647 | ||
648 | /* MREMAP_FIXED checked above. */ | |
649 | new_addr = get_unmapped_area(file, addr, new_len, | |
650 | vma ? vma->vm_pgoff : 0, | |
651 | map_flags); | |
652 | ret = new_addr; | |
653 | if (new_addr & ~PAGE_MASK) | |
654 | goto out_sem; | |
655 | flags |= MREMAP_FIXED; | |
656 | } | |
657 | ret = do_mremap(addr, old_len, new_len, flags, new_addr); | |
658 | out_sem: | |
659 | up_write(¤t->mm->mmap_sem); | |
660 | out: | |
661 | return ret; | |
662 | } | |
663 | ||
664 | /* we come to here via sys_nis_syscall so it can setup the regs argument */ | |
665 | asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs) | |
666 | { | |
667 | static int count; | |
668 | ||
669 | /* Don't make the system unusable, if someone goes stuck */ | |
670 | if (count++ > 5) | |
671 | return -ENOSYS; | |
672 | ||
673 | printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]); | |
674 | #ifdef DEBUG_UNIMP_SYSCALL | |
675 | show_regs (regs); | |
676 | #endif | |
677 | ||
678 | return -ENOSYS; | |
679 | } | |
680 | ||
681 | /* #define DEBUG_SPARC_BREAKPOINT */ | |
682 | ||
683 | asmlinkage void sparc_breakpoint(struct pt_regs *regs) | |
684 | { | |
685 | siginfo_t info; | |
686 | ||
687 | if (test_thread_flag(TIF_32BIT)) { | |
688 | regs->tpc &= 0xffffffff; | |
689 | regs->tnpc &= 0xffffffff; | |
690 | } | |
691 | #ifdef DEBUG_SPARC_BREAKPOINT | |
692 | printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc); | |
693 | #endif | |
694 | info.si_signo = SIGTRAP; | |
695 | info.si_errno = 0; | |
696 | info.si_code = TRAP_BRKPT; | |
697 | info.si_addr = (void __user *)regs->tpc; | |
698 | info.si_trapno = 0; | |
699 | force_sig_info(SIGTRAP, &info, current); | |
700 | #ifdef DEBUG_SPARC_BREAKPOINT | |
701 | printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc); | |
702 | #endif | |
703 | } | |
704 | ||
705 | extern void check_pending(int signum); | |
706 | ||
707 | asmlinkage long sys_getdomainname(char __user *name, int len) | |
708 | { | |
8310a32c DM |
709 | int nlen, err; |
710 | ||
b9c54f91 | 711 | if (len < 0) |
8310a32c | 712 | return -EINVAL; |
1da177e4 LT |
713 | |
714 | down_read(&uts_sem); | |
715 | ||
e9ff3990 | 716 | nlen = strlen(utsname()->domainname) + 1; |
b9c54f91 AW |
717 | err = -EINVAL; |
718 | if (nlen > len) | |
719 | goto out; | |
8310a32c DM |
720 | |
721 | err = -EFAULT; | |
e9ff3990 | 722 | if (!copy_to_user(name, utsname()->domainname, nlen)) |
8310a32c DM |
723 | err = 0; |
724 | ||
b9c54f91 | 725 | out: |
1da177e4 LT |
726 | up_read(&uts_sem); |
727 | return err; | |
728 | } | |
729 | ||
730 | asmlinkage long solaris_syscall(struct pt_regs *regs) | |
731 | { | |
732 | static int count; | |
733 | ||
734 | regs->tpc = regs->tnpc; | |
735 | regs->tnpc += 4; | |
736 | if (test_thread_flag(TIF_32BIT)) { | |
737 | regs->tpc &= 0xffffffff; | |
738 | regs->tnpc &= 0xffffffff; | |
739 | } | |
740 | if (++count <= 5) { | |
741 | printk ("For Solaris binary emulation you need solaris module loaded\n"); | |
742 | show_regs (regs); | |
743 | } | |
744 | send_sig(SIGSEGV, current, 1); | |
745 | ||
746 | return -ENOSYS; | |
747 | } | |
748 | ||
749 | #ifndef CONFIG_SUNOS_EMUL | |
750 | asmlinkage long sunos_syscall(struct pt_regs *regs) | |
751 | { | |
752 | static int count; | |
753 | ||
754 | regs->tpc = regs->tnpc; | |
755 | regs->tnpc += 4; | |
756 | if (test_thread_flag(TIF_32BIT)) { | |
757 | regs->tpc &= 0xffffffff; | |
758 | regs->tnpc &= 0xffffffff; | |
759 | } | |
760 | if (++count <= 20) | |
761 | printk ("SunOS binary emulation not compiled in\n"); | |
762 | force_sig(SIGSEGV, current); | |
763 | ||
764 | return -ENOSYS; | |
765 | } | |
766 | #endif | |
767 | ||
768 | asmlinkage long sys_utrap_install(utrap_entry_t type, | |
769 | utrap_handler_t new_p, | |
770 | utrap_handler_t new_d, | |
771 | utrap_handler_t __user *old_p, | |
772 | utrap_handler_t __user *old_d) | |
773 | { | |
774 | if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31) | |
775 | return -EINVAL; | |
776 | if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) { | |
777 | if (old_p) { | |
778 | if (!current_thread_info()->utraps) { | |
779 | if (put_user(NULL, old_p)) | |
780 | return -EFAULT; | |
781 | } else { | |
782 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
783 | return -EFAULT; | |
784 | } | |
785 | } | |
786 | if (old_d) { | |
787 | if (put_user(NULL, old_d)) | |
788 | return -EFAULT; | |
789 | } | |
790 | return 0; | |
791 | } | |
792 | if (!current_thread_info()->utraps) { | |
793 | current_thread_info()->utraps = | |
9132983a | 794 | kzalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL); |
1da177e4 LT |
795 | if (!current_thread_info()->utraps) |
796 | return -ENOMEM; | |
797 | current_thread_info()->utraps[0] = 1; | |
1da177e4 LT |
798 | } else { |
799 | if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p && | |
800 | current_thread_info()->utraps[0] > 1) { | |
801 | long *p = current_thread_info()->utraps; | |
802 | ||
803 | current_thread_info()->utraps = | |
804 | kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), | |
805 | GFP_KERNEL); | |
806 | if (!current_thread_info()->utraps) { | |
807 | current_thread_info()->utraps = p; | |
808 | return -ENOMEM; | |
809 | } | |
810 | p[0]--; | |
811 | current_thread_info()->utraps[0] = 1; | |
812 | memcpy(current_thread_info()->utraps+1, p+1, | |
813 | UT_TRAP_INSTRUCTION_31*sizeof(long)); | |
814 | } | |
815 | } | |
816 | if (old_p) { | |
817 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
818 | return -EFAULT; | |
819 | } | |
820 | if (old_d) { | |
821 | if (put_user(NULL, old_d)) | |
822 | return -EFAULT; | |
823 | } | |
824 | current_thread_info()->utraps[type] = (long)new_p; | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | long sparc_memory_ordering(unsigned long model, struct pt_regs *regs) | |
830 | { | |
831 | if (model >= 3) | |
832 | return -EINVAL; | |
833 | regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14); | |
834 | return 0; | |
835 | } | |
836 | ||
837 | asmlinkage long sys_rt_sigaction(int sig, | |
838 | const struct sigaction __user *act, | |
839 | struct sigaction __user *oact, | |
840 | void __user *restorer, | |
841 | size_t sigsetsize) | |
842 | { | |
843 | struct k_sigaction new_ka, old_ka; | |
844 | int ret; | |
845 | ||
846 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
847 | if (sigsetsize != sizeof(sigset_t)) | |
848 | return -EINVAL; | |
849 | ||
850 | if (act) { | |
851 | new_ka.ka_restorer = restorer; | |
852 | if (copy_from_user(&new_ka.sa, act, sizeof(*act))) | |
853 | return -EFAULT; | |
854 | } | |
855 | ||
856 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
857 | ||
858 | if (!ret && oact) { | |
859 | if (copy_to_user(oact, &old_ka.sa, sizeof(*oact))) | |
860 | return -EFAULT; | |
861 | } | |
862 | ||
863 | return ret; | |
864 | } | |
865 | ||
866 | /* Invoked by rtrap code to update performance counters in | |
867 | * user space. | |
868 | */ | |
869 | asmlinkage void update_perfctrs(void) | |
870 | { | |
871 | unsigned long pic, tmp; | |
872 | ||
873 | read_pic(pic); | |
874 | tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic); | |
875 | __put_user(tmp, current_thread_info()->user_cntd0); | |
876 | tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32)); | |
877 | __put_user(tmp, current_thread_info()->user_cntd1); | |
878 | reset_pic(); | |
879 | } | |
880 | ||
881 | asmlinkage long sys_perfctr(int opcode, unsigned long arg0, unsigned long arg1, unsigned long arg2) | |
882 | { | |
883 | int err = 0; | |
884 | ||
885 | switch(opcode) { | |
886 | case PERFCTR_ON: | |
887 | current_thread_info()->pcr_reg = arg2; | |
888 | current_thread_info()->user_cntd0 = (u64 __user *) arg0; | |
889 | current_thread_info()->user_cntd1 = (u64 __user *) arg1; | |
890 | current_thread_info()->kernel_cntd0 = | |
891 | current_thread_info()->kernel_cntd1 = 0; | |
892 | write_pcr(arg2); | |
893 | reset_pic(); | |
894 | set_thread_flag(TIF_PERFCTR); | |
895 | break; | |
896 | ||
897 | case PERFCTR_OFF: | |
898 | err = -EINVAL; | |
899 | if (test_thread_flag(TIF_PERFCTR)) { | |
900 | current_thread_info()->user_cntd0 = | |
901 | current_thread_info()->user_cntd1 = NULL; | |
902 | current_thread_info()->pcr_reg = 0; | |
903 | write_pcr(0); | |
904 | clear_thread_flag(TIF_PERFCTR); | |
905 | err = 0; | |
906 | } | |
907 | break; | |
908 | ||
909 | case PERFCTR_READ: { | |
910 | unsigned long pic, tmp; | |
911 | ||
912 | if (!test_thread_flag(TIF_PERFCTR)) { | |
913 | err = -EINVAL; | |
914 | break; | |
915 | } | |
916 | read_pic(pic); | |
917 | tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic); | |
918 | err |= __put_user(tmp, current_thread_info()->user_cntd0); | |
919 | tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32)); | |
920 | err |= __put_user(tmp, current_thread_info()->user_cntd1); | |
921 | reset_pic(); | |
922 | break; | |
923 | } | |
924 | ||
925 | case PERFCTR_CLRPIC: | |
926 | if (!test_thread_flag(TIF_PERFCTR)) { | |
927 | err = -EINVAL; | |
928 | break; | |
929 | } | |
930 | current_thread_info()->kernel_cntd0 = | |
931 | current_thread_info()->kernel_cntd1 = 0; | |
932 | reset_pic(); | |
933 | break; | |
934 | ||
935 | case PERFCTR_SETPCR: { | |
936 | u64 __user *user_pcr = (u64 __user *)arg0; | |
937 | ||
938 | if (!test_thread_flag(TIF_PERFCTR)) { | |
939 | err = -EINVAL; | |
940 | break; | |
941 | } | |
942 | err |= __get_user(current_thread_info()->pcr_reg, user_pcr); | |
943 | write_pcr(current_thread_info()->pcr_reg); | |
944 | current_thread_info()->kernel_cntd0 = | |
945 | current_thread_info()->kernel_cntd1 = 0; | |
946 | reset_pic(); | |
947 | break; | |
948 | } | |
949 | ||
950 | case PERFCTR_GETPCR: { | |
951 | u64 __user *user_pcr = (u64 __user *)arg0; | |
952 | ||
953 | if (!test_thread_flag(TIF_PERFCTR)) { | |
954 | err = -EINVAL; | |
955 | break; | |
956 | } | |
957 | err |= __put_user(current_thread_info()->pcr_reg, user_pcr); | |
958 | break; | |
959 | } | |
960 | ||
961 | default: | |
962 | err = -EINVAL; | |
963 | break; | |
964 | }; | |
965 | return err; | |
966 | } | |
fe74290d AB |
967 | |
968 | /* | |
969 | * Do a system call from kernel instead of calling sys_execve so we | |
970 | * end up with proper pt_regs. | |
971 | */ | |
972 | int kernel_execve(const char *filename, char *const argv[], char *const envp[]) | |
973 | { | |
974 | long __res; | |
975 | register long __g1 __asm__ ("g1") = __NR_execve; | |
976 | register long __o0 __asm__ ("o0") = (long)(filename); | |
977 | register long __o1 __asm__ ("o1") = (long)(argv); | |
978 | register long __o2 __asm__ ("o2") = (long)(envp); | |
979 | asm volatile ("t 0x6d\n\t" | |
980 | "sub %%g0, %%o0, %0\n\t" | |
981 | "movcc %%xcc, %%o0, %0\n\t" | |
982 | : "=r" (__res), "=&r" (__o0) | |
983 | : "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1) | |
984 | : "cc"); | |
985 | return __res; | |
986 | } |