Commit | Line | Data |
---|---|---|
207ddd0a | 1 | /* linux/arch/sparc64/kernel/sys_sparc.c |
1da177e4 LT |
2 | * |
3 | * This file contains various random system calls that | |
4 | * have a non-standard calling sequence on the Linux/sparc | |
5 | * platform. | |
6 | */ | |
7 | ||
1da177e4 LT |
8 | #include <linux/errno.h> |
9 | #include <linux/types.h> | |
10 | #include <linux/sched.h> | |
11 | #include <linux/fs.h> | |
12 | #include <linux/file.h> | |
13 | #include <linux/mm.h> | |
14 | #include <linux/sem.h> | |
15 | #include <linux/msg.h> | |
16 | #include <linux/shm.h> | |
17 | #include <linux/stat.h> | |
18 | #include <linux/mman.h> | |
19 | #include <linux/utsname.h> | |
20 | #include <linux/smp.h> | |
1da177e4 LT |
21 | #include <linux/slab.h> |
22 | #include <linux/syscalls.h> | |
23 | #include <linux/ipc.h> | |
24 | #include <linux/personality.h> | |
05f9ca83 | 25 | #include <linux/random.h> |
917c3660 | 26 | #include <linux/module.h> |
1da177e4 LT |
27 | |
28 | #include <asm/uaccess.h> | |
1da177e4 | 29 | #include <asm/utrap.h> |
fe74290d | 30 | #include <asm/unistd.h> |
1da177e4 | 31 | |
207ddd0a DM |
32 | #include "entry.h" |
33 | #include "systbls.h" | |
34 | ||
1da177e4 LT |
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; | |
c4caa778 AV |
319 | unsigned long (*get_area)(struct file *, unsigned long, |
320 | unsigned long, unsigned long, unsigned long); | |
321 | ||
322 | get_area = current->mm->get_unmapped_area; | |
1da177e4 LT |
323 | |
324 | if (flags & MAP_FIXED) { | |
325 | /* Ok, don't mess with it. */ | |
c4caa778 | 326 | return get_area(NULL, orig_addr, len, pgoff, flags); |
1da177e4 LT |
327 | } |
328 | flags &= ~MAP_SHARED; | |
329 | ||
330 | align_goal = PAGE_SIZE; | |
331 | if (len >= (4UL * 1024 * 1024)) | |
332 | align_goal = (4UL * 1024 * 1024); | |
333 | else if (len >= (512UL * 1024)) | |
334 | align_goal = (512UL * 1024); | |
335 | else if (len >= (64UL * 1024)) | |
336 | align_goal = (64UL * 1024); | |
337 | ||
338 | do { | |
c4caa778 | 339 | addr = get_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags); |
1da177e4 LT |
340 | if (!(addr & ~PAGE_MASK)) { |
341 | addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL); | |
342 | break; | |
343 | } | |
344 | ||
345 | if (align_goal == (4UL * 1024 * 1024)) | |
346 | align_goal = (512UL * 1024); | |
347 | else if (align_goal == (512UL * 1024)) | |
348 | align_goal = (64UL * 1024); | |
349 | else | |
350 | align_goal = PAGE_SIZE; | |
351 | } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE); | |
352 | ||
353 | /* Mapping is smaller than 64K or larger areas could not | |
354 | * be obtained. | |
355 | */ | |
356 | if (addr & ~PAGE_MASK) | |
c4caa778 | 357 | addr = get_area(NULL, orig_addr, len, pgoff, flags); |
1da177e4 LT |
358 | |
359 | return addr; | |
360 | } | |
917c3660 | 361 | EXPORT_SYMBOL(get_fb_unmapped_area); |
1da177e4 | 362 | |
5a0efea0 DM |
363 | /* Essentially the same as PowerPC. */ |
364 | static unsigned long mmap_rnd(void) | |
a91690dd | 365 | { |
5a0efea0 | 366 | unsigned long rnd = 0UL; |
05f9ca83 DM |
367 | |
368 | if (current->flags & PF_RANDOMIZE) { | |
5a0efea0 | 369 | unsigned long val = get_random_int(); |
05f9ca83 | 370 | if (test_thread_flag(TIF_32BIT)) |
5a0efea0 | 371 | rnd = (val % (1UL << (22UL-PAGE_SHIFT))); |
05f9ca83 | 372 | else |
5a0efea0 | 373 | rnd = (val % (1UL << (29UL-PAGE_SHIFT))); |
05f9ca83 | 374 | } |
5a0efea0 DM |
375 | return (rnd << PAGE_SHIFT) * 2; |
376 | } | |
377 | ||
378 | void arch_pick_mmap_layout(struct mm_struct *mm) | |
379 | { | |
380 | unsigned long random_factor = mmap_rnd(); | |
381 | unsigned long gap; | |
05f9ca83 | 382 | |
a91690dd DM |
383 | /* |
384 | * Fall back to the standard layout if the personality | |
385 | * bit is set, or if the expected stack growth is unlimited: | |
386 | */ | |
76704fb5 | 387 | gap = rlimit(RLIMIT_STACK); |
a91690dd DM |
388 | if (!test_thread_flag(TIF_32BIT) || |
389 | (current->personality & ADDR_COMPAT_LAYOUT) || | |
76704fb5 | 390 | gap == RLIM_INFINITY || |
a91690dd | 391 | sysctl_legacy_va_layout) { |
05f9ca83 | 392 | mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; |
a91690dd DM |
393 | mm->get_unmapped_area = arch_get_unmapped_area; |
394 | mm->unmap_area = arch_unmap_area; | |
395 | } else { | |
396 | /* We know it's 32-bit */ | |
d61e16df | 397 | unsigned long task_size = STACK_TOP32; |
a91690dd | 398 | |
a91690dd DM |
399 | if (gap < 128 * 1024 * 1024) |
400 | gap = 128 * 1024 * 1024; | |
401 | if (gap > (task_size / 6 * 5)) | |
402 | gap = (task_size / 6 * 5); | |
403 | ||
05f9ca83 | 404 | mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor); |
a91690dd DM |
405 | mm->get_unmapped_area = arch_get_unmapped_area_topdown; |
406 | mm->unmap_area = arch_unmap_area_topdown; | |
407 | } | |
408 | } | |
409 | ||
1da177e4 LT |
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 | */ | |
e4265019 | 414 | SYSCALL_DEFINE1(sparc_pipe_real, struct pt_regs *, regs) |
1da177e4 LT |
415 | { |
416 | int fd[2]; | |
417 | int error; | |
418 | ||
ed8cae8b | 419 | error = do_pipe_flags(fd, 0); |
1da177e4 LT |
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 | ||
baed7fc9 | 434 | SYSCALL_DEFINE6(sparc_ipc, unsigned int, call, int, first, unsigned long, second, |
e4265019 | 435 | unsigned long, third, void __user *, ptr, long, fifth) |
1da177e4 | 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, | |
207ddd0a DM |
448 | (const struct timespec __user *) |
449 | (unsigned long) fifth); | |
1da177e4 LT |
450 | goto out; |
451 | case SEMGET: | |
452 | err = sys_semget(first, (int)second, (int)third); | |
453 | goto out; | |
454 | case SEMCTL: { | |
020cfb05 DM |
455 | err = sys_semctl(first, second, |
456 | (int)third | IPC_64, | |
7379b42b | 457 | (union semun) ptr); |
1da177e4 LT |
458 | goto out; |
459 | } | |
460 | default: | |
461 | err = -ENOSYS; | |
462 | goto out; | |
463 | }; | |
464 | } | |
465 | if (call <= MSGCTL) { | |
466 | switch (call) { | |
467 | case MSGSND: | |
468 | err = sys_msgsnd(first, ptr, (size_t)second, | |
469 | (int)third); | |
470 | goto out; | |
471 | case MSGRCV: | |
472 | err = sys_msgrcv(first, ptr, (size_t)second, fifth, | |
473 | (int)third); | |
474 | goto out; | |
475 | case MSGGET: | |
476 | err = sys_msgget((key_t)first, (int)second); | |
477 | goto out; | |
478 | case MSGCTL: | |
479 | err = sys_msgctl(first, (int)second | IPC_64, ptr); | |
480 | goto out; | |
481 | default: | |
482 | err = -ENOSYS; | |
483 | goto out; | |
484 | }; | |
485 | } | |
486 | if (call <= SHMCTL) { | |
487 | switch (call) { | |
488 | case SHMAT: { | |
489 | ulong raddr; | |
490 | err = do_shmat(first, ptr, (int)second, &raddr); | |
491 | if (!err) { | |
492 | if (put_user(raddr, | |
493 | (ulong __user *) third)) | |
494 | err = -EFAULT; | |
495 | } | |
496 | goto out; | |
497 | } | |
498 | case SHMDT: | |
499 | err = sys_shmdt(ptr); | |
500 | goto out; | |
501 | case SHMGET: | |
502 | err = sys_shmget(first, (size_t)second, (int)third); | |
503 | goto out; | |
504 | case SHMCTL: | |
505 | err = sys_shmctl(first, (int)second | IPC_64, ptr); | |
506 | goto out; | |
507 | default: | |
508 | err = -ENOSYS; | |
509 | goto out; | |
510 | }; | |
511 | } else { | |
512 | err = -ENOSYS; | |
513 | } | |
514 | out: | |
515 | return err; | |
516 | } | |
517 | ||
e4265019 | 518 | SYSCALL_DEFINE1(sparc64_personality, unsigned long, personality) |
1da177e4 LT |
519 | { |
520 | int ret; | |
521 | ||
522 | if (current->personality == PER_LINUX32 && | |
523 | personality == PER_LINUX) | |
524 | personality = PER_LINUX32; | |
525 | ret = sys_personality(personality); | |
526 | if (ret == PER_LINUX32) | |
527 | ret = PER_LINUX; | |
528 | ||
529 | return ret; | |
530 | } | |
531 | ||
f92ffa12 | 532 | int sparc_mmap_check(unsigned long addr, unsigned long len) |
3a459756 KK |
533 | { |
534 | if (test_thread_flag(TIF_32BIT)) { | |
535 | if (len >= STACK_TOP32) | |
536 | return -EINVAL; | |
537 | ||
58163393 | 538 | if (addr > STACK_TOP32 - len) |
3a459756 KK |
539 | return -EINVAL; |
540 | } else { | |
541 | if (len >= VA_EXCLUDE_START) | |
542 | return -EINVAL; | |
543 | ||
58163393 | 544 | if (invalid_64bit_range(addr, len)) |
3a459756 KK |
545 | return -EINVAL; |
546 | } | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
1da177e4 | 551 | /* Linux version of mmap */ |
e4265019 DM |
552 | SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, |
553 | unsigned long, prot, unsigned long, flags, unsigned long, fd, | |
554 | unsigned long, off) | |
1da177e4 | 555 | { |
f8b72560 | 556 | unsigned long retval = -EINVAL; |
1da177e4 | 557 | |
f8b72560 AV |
558 | if ((off + PAGE_ALIGN(len)) < off) |
559 | goto out; | |
560 | if (off & ~PAGE_MASK) | |
561 | goto out; | |
562 | retval = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); | |
1da177e4 LT |
563 | out: |
564 | return retval; | |
565 | } | |
566 | ||
e4265019 | 567 | SYSCALL_DEFINE2(64_munmap, unsigned long, addr, size_t, len) |
1da177e4 LT |
568 | { |
569 | long ret; | |
570 | ||
8bcd1741 | 571 | if (invalid_64bit_range(addr, len)) |
1da177e4 | 572 | return -EINVAL; |
8bcd1741 | 573 | |
1da177e4 LT |
574 | down_write(¤t->mm->mmap_sem); |
575 | ret = do_munmap(current->mm, addr, len); | |
576 | up_write(¤t->mm->mmap_sem); | |
577 | return ret; | |
578 | } | |
579 | ||
580 | extern unsigned long do_mremap(unsigned long addr, | |
581 | unsigned long old_len, unsigned long new_len, | |
582 | unsigned long flags, unsigned long new_addr); | |
583 | ||
e4265019 DM |
584 | SYSCALL_DEFINE5(64_mremap, unsigned long, addr, unsigned long, old_len, |
585 | unsigned long, new_len, unsigned long, flags, | |
586 | unsigned long, new_addr) | |
1da177e4 | 587 | { |
1da177e4 | 588 | unsigned long ret = -EINVAL; |
8bcd1741 | 589 | |
1da177e4 LT |
590 | if (test_thread_flag(TIF_32BIT)) |
591 | goto out; | |
8bcd1741 | 592 | |
1da177e4 | 593 | down_write(¤t->mm->mmap_sem); |
1da177e4 | 594 | ret = do_mremap(addr, old_len, new_len, flags, new_addr); |
1da177e4 LT |
595 | up_write(¤t->mm->mmap_sem); |
596 | out: | |
597 | return ret; | |
598 | } | |
599 | ||
600 | /* we come to here via sys_nis_syscall so it can setup the regs argument */ | |
601 | asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs) | |
602 | { | |
603 | static int count; | |
604 | ||
605 | /* Don't make the system unusable, if someone goes stuck */ | |
606 | if (count++ > 5) | |
607 | return -ENOSYS; | |
608 | ||
609 | printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]); | |
610 | #ifdef DEBUG_UNIMP_SYSCALL | |
611 | show_regs (regs); | |
612 | #endif | |
613 | ||
614 | return -ENOSYS; | |
615 | } | |
616 | ||
617 | /* #define DEBUG_SPARC_BREAKPOINT */ | |
618 | ||
619 | asmlinkage void sparc_breakpoint(struct pt_regs *regs) | |
620 | { | |
621 | siginfo_t info; | |
622 | ||
623 | if (test_thread_flag(TIF_32BIT)) { | |
624 | regs->tpc &= 0xffffffff; | |
625 | regs->tnpc &= 0xffffffff; | |
626 | } | |
627 | #ifdef DEBUG_SPARC_BREAKPOINT | |
628 | printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc); | |
629 | #endif | |
630 | info.si_signo = SIGTRAP; | |
631 | info.si_errno = 0; | |
632 | info.si_code = TRAP_BRKPT; | |
633 | info.si_addr = (void __user *)regs->tpc; | |
634 | info.si_trapno = 0; | |
635 | force_sig_info(SIGTRAP, &info, current); | |
636 | #ifdef DEBUG_SPARC_BREAKPOINT | |
637 | printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc); | |
638 | #endif | |
639 | } | |
640 | ||
641 | extern void check_pending(int signum); | |
642 | ||
e4265019 | 643 | SYSCALL_DEFINE2(getdomainname, char __user *, name, int, len) |
1da177e4 | 644 | { |
8310a32c DM |
645 | int nlen, err; |
646 | ||
b9c54f91 | 647 | if (len < 0) |
8310a32c | 648 | return -EINVAL; |
1da177e4 LT |
649 | |
650 | down_read(&uts_sem); | |
651 | ||
e9ff3990 | 652 | nlen = strlen(utsname()->domainname) + 1; |
b9c54f91 AW |
653 | err = -EINVAL; |
654 | if (nlen > len) | |
655 | goto out; | |
8310a32c DM |
656 | |
657 | err = -EFAULT; | |
e9ff3990 | 658 | if (!copy_to_user(name, utsname()->domainname, nlen)) |
8310a32c DM |
659 | err = 0; |
660 | ||
b9c54f91 | 661 | out: |
1da177e4 LT |
662 | up_read(&uts_sem); |
663 | return err; | |
664 | } | |
665 | ||
e4265019 DM |
666 | SYSCALL_DEFINE5(utrap_install, utrap_entry_t, type, |
667 | utrap_handler_t, new_p, utrap_handler_t, new_d, | |
668 | utrap_handler_t __user *, old_p, | |
669 | utrap_handler_t __user *, old_d) | |
1da177e4 LT |
670 | { |
671 | if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31) | |
672 | return -EINVAL; | |
673 | if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) { | |
674 | if (old_p) { | |
675 | if (!current_thread_info()->utraps) { | |
676 | if (put_user(NULL, old_p)) | |
677 | return -EFAULT; | |
678 | } else { | |
679 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
680 | return -EFAULT; | |
681 | } | |
682 | } | |
683 | if (old_d) { | |
684 | if (put_user(NULL, old_d)) | |
685 | return -EFAULT; | |
686 | } | |
687 | return 0; | |
688 | } | |
689 | if (!current_thread_info()->utraps) { | |
690 | current_thread_info()->utraps = | |
9132983a | 691 | kzalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL); |
1da177e4 LT |
692 | if (!current_thread_info()->utraps) |
693 | return -ENOMEM; | |
694 | current_thread_info()->utraps[0] = 1; | |
1da177e4 LT |
695 | } else { |
696 | if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p && | |
697 | current_thread_info()->utraps[0] > 1) { | |
207ddd0a | 698 | unsigned long *p = current_thread_info()->utraps; |
1da177e4 LT |
699 | |
700 | current_thread_info()->utraps = | |
701 | kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), | |
702 | GFP_KERNEL); | |
703 | if (!current_thread_info()->utraps) { | |
704 | current_thread_info()->utraps = p; | |
705 | return -ENOMEM; | |
706 | } | |
707 | p[0]--; | |
708 | current_thread_info()->utraps[0] = 1; | |
709 | memcpy(current_thread_info()->utraps+1, p+1, | |
710 | UT_TRAP_INSTRUCTION_31*sizeof(long)); | |
711 | } | |
712 | } | |
713 | if (old_p) { | |
714 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
715 | return -EFAULT; | |
716 | } | |
717 | if (old_d) { | |
718 | if (put_user(NULL, old_d)) | |
719 | return -EFAULT; | |
720 | } | |
721 | current_thread_info()->utraps[type] = (long)new_p; | |
722 | ||
723 | return 0; | |
724 | } | |
725 | ||
207ddd0a DM |
726 | asmlinkage long sparc_memory_ordering(unsigned long model, |
727 | struct pt_regs *regs) | |
1da177e4 LT |
728 | { |
729 | if (model >= 3) | |
730 | return -EINVAL; | |
731 | regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14); | |
732 | return 0; | |
733 | } | |
734 | ||
e4265019 DM |
735 | SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act, |
736 | struct sigaction __user *, oact, void __user *, restorer, | |
737 | size_t, sigsetsize) | |
1da177e4 LT |
738 | { |
739 | struct k_sigaction new_ka, old_ka; | |
740 | int ret; | |
741 | ||
742 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
743 | if (sigsetsize != sizeof(sigset_t)) | |
744 | return -EINVAL; | |
745 | ||
746 | if (act) { | |
747 | new_ka.ka_restorer = restorer; | |
748 | if (copy_from_user(&new_ka.sa, act, sizeof(*act))) | |
749 | return -EFAULT; | |
750 | } | |
751 | ||
752 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
753 | ||
754 | if (!ret && oact) { | |
755 | if (copy_to_user(oact, &old_ka.sa, sizeof(*oact))) | |
756 | return -EFAULT; | |
757 | } | |
758 | ||
759 | return ret; | |
760 | } | |
761 | ||
fe74290d AB |
762 | /* |
763 | * Do a system call from kernel instead of calling sys_execve so we | |
764 | * end up with proper pt_regs. | |
765 | */ | |
d7627467 DH |
766 | int kernel_execve(const char *filename, |
767 | const char *const argv[], | |
768 | const char *const envp[]) | |
fe74290d AB |
769 | { |
770 | long __res; | |
771 | register long __g1 __asm__ ("g1") = __NR_execve; | |
772 | register long __o0 __asm__ ("o0") = (long)(filename); | |
773 | register long __o1 __asm__ ("o1") = (long)(argv); | |
774 | register long __o2 __asm__ ("o2") = (long)(envp); | |
775 | asm volatile ("t 0x6d\n\t" | |
776 | "sub %%g0, %%o0, %0\n\t" | |
777 | "movcc %%xcc, %%o0, %0\n\t" | |
778 | : "=r" (__res), "=&r" (__o0) | |
779 | : "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1) | |
780 | : "cc"); | |
781 | return __res; | |
782 | } |