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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 | ||
9 | #include <linux/config.h> | |
10 | #include <linux/errno.h> | |
11 | #include <linux/types.h> | |
12 | #include <linux/sched.h> | |
13 | #include <linux/fs.h> | |
14 | #include <linux/file.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/sem.h> | |
17 | #include <linux/msg.h> | |
18 | #include <linux/shm.h> | |
19 | #include <linux/stat.h> | |
20 | #include <linux/mman.h> | |
21 | #include <linux/utsname.h> | |
22 | #include <linux/smp.h> | |
23 | #include <linux/smp_lock.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/syscalls.h> | |
26 | #include <linux/ipc.h> | |
27 | #include <linux/personality.h> | |
28 | ||
29 | #include <asm/uaccess.h> | |
30 | #include <asm/ipc.h> | |
31 | #include <asm/utrap.h> | |
32 | #include <asm/perfctr.h> | |
33 | ||
34 | /* #define DEBUG_UNIMP_SYSCALL */ | |
35 | ||
1da177e4 LT |
36 | asmlinkage unsigned long sys_getpagesize(void) |
37 | { | |
38 | return PAGE_SIZE; | |
39 | } | |
40 | ||
8bcd1741 DM |
41 | #define VA_EXCLUDE_START (0x0000080000000000UL - (1UL << 32UL)) |
42 | #define VA_EXCLUDE_END (0xfffff80000000000UL + (1UL << 32UL)) | |
43 | ||
44 | /* Does addr --> addr+len fall within 4GB of the VA-space hole or | |
45 | * overflow past the end of the 64-bit address space? | |
46 | */ | |
47 | static inline int invalid_64bit_range(unsigned long addr, unsigned long len) | |
48 | { | |
49 | unsigned long va_exclude_start, va_exclude_end; | |
50 | ||
51 | va_exclude_start = VA_EXCLUDE_START; | |
52 | va_exclude_end = VA_EXCLUDE_END; | |
53 | ||
54 | if (unlikely(len >= va_exclude_start)) | |
55 | return 1; | |
56 | ||
57 | if (unlikely((addr + len) < addr)) | |
58 | return 1; | |
59 | ||
60 | if (unlikely((addr >= va_exclude_start && addr < va_exclude_end) || | |
61 | ((addr + len) >= va_exclude_start && | |
62 | (addr + len) < va_exclude_end))) | |
63 | return 1; | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | /* Does start,end straddle the VA-space hole? */ | |
69 | static inline int straddles_64bit_va_hole(unsigned long start, unsigned long end) | |
70 | { | |
71 | unsigned long va_exclude_start, va_exclude_end; | |
72 | ||
73 | va_exclude_start = VA_EXCLUDE_START; | |
74 | va_exclude_end = VA_EXCLUDE_END; | |
75 | ||
76 | if (likely(start < va_exclude_start && end < va_exclude_start)) | |
77 | return 0; | |
78 | ||
79 | if (likely(start >= va_exclude_end && end >= va_exclude_end)) | |
80 | return 0; | |
81 | ||
82 | return 1; | |
83 | } | |
84 | ||
1da177e4 LT |
85 | #define COLOUR_ALIGN(addr,pgoff) \ |
86 | ((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \ | |
87 | (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1))) | |
88 | ||
89 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) | |
90 | { | |
91 | struct mm_struct *mm = current->mm; | |
92 | struct vm_area_struct * vma; | |
93 | unsigned long task_size = TASK_SIZE; | |
94 | unsigned long start_addr; | |
95 | int do_color_align; | |
96 | ||
97 | if (flags & MAP_FIXED) { | |
98 | /* We do not accept a shared mapping if it would violate | |
99 | * cache aliasing constraints. | |
100 | */ | |
101 | if ((flags & MAP_SHARED) && | |
102 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
103 | return -EINVAL; | |
104 | return addr; | |
105 | } | |
106 | ||
107 | if (test_thread_flag(TIF_32BIT)) | |
108 | task_size = 0xf0000000UL; | |
8bcd1741 | 109 | if (len > task_size || len >= VA_EXCLUDE_START) |
1da177e4 LT |
110 | return -ENOMEM; |
111 | ||
112 | do_color_align = 0; | |
113 | if (filp || (flags & MAP_SHARED)) | |
114 | do_color_align = 1; | |
115 | ||
116 | if (addr) { | |
117 | if (do_color_align) | |
118 | addr = COLOUR_ALIGN(addr, pgoff); | |
119 | else | |
120 | addr = PAGE_ALIGN(addr); | |
121 | ||
122 | vma = find_vma(mm, addr); | |
123 | if (task_size - len >= addr && | |
124 | (!vma || addr + len <= vma->vm_start)) | |
125 | return addr; | |
126 | } | |
127 | ||
1363c3cd WW |
128 | if (len <= mm->cached_hole_size) { |
129 | mm->cached_hole_size = 0; | |
130 | mm->free_area_cache = TASK_UNMAPPED_BASE; | |
131 | } | |
1da177e4 LT |
132 | start_addr = addr = mm->free_area_cache; |
133 | ||
134 | task_size -= len; | |
135 | ||
136 | full_search: | |
137 | if (do_color_align) | |
138 | addr = COLOUR_ALIGN(addr, pgoff); | |
139 | else | |
140 | addr = PAGE_ALIGN(addr); | |
141 | ||
142 | for (vma = find_vma(mm, addr); ; vma = vma->vm_next) { | |
143 | /* At this point: (!vma || addr < vma->vm_end). */ | |
8bcd1741 DM |
144 | if (addr < VA_EXCLUDE_START && |
145 | (addr + len) >= VA_EXCLUDE_START) { | |
146 | addr = VA_EXCLUDE_END; | |
147 | vma = find_vma(mm, VA_EXCLUDE_END); | |
1da177e4 LT |
148 | } |
149 | if (task_size < addr) { | |
150 | if (start_addr != TASK_UNMAPPED_BASE) { | |
151 | start_addr = addr = TASK_UNMAPPED_BASE; | |
1363c3cd | 152 | mm->cached_hole_size = 0; |
1da177e4 LT |
153 | goto full_search; |
154 | } | |
155 | return -ENOMEM; | |
156 | } | |
157 | if (!vma || addr + len <= vma->vm_start) { | |
158 | /* | |
159 | * Remember the place where we stopped the search: | |
160 | */ | |
161 | mm->free_area_cache = addr + len; | |
162 | return addr; | |
163 | } | |
1363c3cd WW |
164 | if (addr + mm->cached_hole_size < vma->vm_start) |
165 | mm->cached_hole_size = vma->vm_start - addr; | |
166 | ||
1da177e4 LT |
167 | addr = vma->vm_end; |
168 | if (do_color_align) | |
169 | addr = COLOUR_ALIGN(addr, pgoff); | |
170 | } | |
171 | } | |
172 | ||
173 | /* Try to align mapping such that we align it as much as possible. */ | |
174 | unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags) | |
175 | { | |
176 | unsigned long align_goal, addr = -ENOMEM; | |
177 | ||
178 | if (flags & MAP_FIXED) { | |
179 | /* Ok, don't mess with it. */ | |
180 | return get_unmapped_area(NULL, addr, len, pgoff, flags); | |
181 | } | |
182 | flags &= ~MAP_SHARED; | |
183 | ||
184 | align_goal = PAGE_SIZE; | |
185 | if (len >= (4UL * 1024 * 1024)) | |
186 | align_goal = (4UL * 1024 * 1024); | |
187 | else if (len >= (512UL * 1024)) | |
188 | align_goal = (512UL * 1024); | |
189 | else if (len >= (64UL * 1024)) | |
190 | align_goal = (64UL * 1024); | |
191 | ||
192 | do { | |
193 | addr = get_unmapped_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags); | |
194 | if (!(addr & ~PAGE_MASK)) { | |
195 | addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL); | |
196 | break; | |
197 | } | |
198 | ||
199 | if (align_goal == (4UL * 1024 * 1024)) | |
200 | align_goal = (512UL * 1024); | |
201 | else if (align_goal == (512UL * 1024)) | |
202 | align_goal = (64UL * 1024); | |
203 | else | |
204 | align_goal = PAGE_SIZE; | |
205 | } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE); | |
206 | ||
207 | /* Mapping is smaller than 64K or larger areas could not | |
208 | * be obtained. | |
209 | */ | |
210 | if (addr & ~PAGE_MASK) | |
211 | addr = get_unmapped_area(NULL, orig_addr, len, pgoff, flags); | |
212 | ||
213 | return addr; | |
214 | } | |
215 | ||
216 | asmlinkage unsigned long sparc_brk(unsigned long brk) | |
217 | { | |
218 | /* People could try to be nasty and use ta 0x6d in 32bit programs */ | |
8bcd1741 | 219 | if (test_thread_flag(TIF_32BIT) && brk >= 0xf0000000UL) |
1da177e4 LT |
220 | return current->mm->brk; |
221 | ||
8bcd1741 | 222 | if (unlikely(straddles_64bit_va_hole(current->mm->brk, brk))) |
1da177e4 | 223 | return current->mm->brk; |
8bcd1741 | 224 | |
1da177e4 LT |
225 | return sys_brk(brk); |
226 | } | |
227 | ||
228 | /* | |
229 | * sys_pipe() is the normal C calling standard for creating | |
230 | * a pipe. It's not the way unix traditionally does this, though. | |
231 | */ | |
232 | asmlinkage long sparc_pipe(struct pt_regs *regs) | |
233 | { | |
234 | int fd[2]; | |
235 | int error; | |
236 | ||
237 | error = do_pipe(fd); | |
238 | if (error) | |
239 | goto out; | |
240 | regs->u_regs[UREG_I1] = fd[1]; | |
241 | error = fd[0]; | |
242 | out: | |
243 | return error; | |
244 | } | |
245 | ||
246 | /* | |
247 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
248 | * | |
249 | * This is really horribly ugly. | |
250 | */ | |
251 | ||
252 | asmlinkage long sys_ipc(unsigned int call, int first, unsigned long second, | |
253 | unsigned long third, void __user *ptr, long fifth) | |
254 | { | |
255 | int err; | |
256 | ||
257 | /* No need for backward compatibility. We can start fresh... */ | |
258 | if (call <= SEMCTL) { | |
259 | switch (call) { | |
260 | case SEMOP: | |
261 | err = sys_semtimedop(first, ptr, | |
262 | (unsigned)second, NULL); | |
263 | goto out; | |
264 | case SEMTIMEDOP: | |
265 | err = sys_semtimedop(first, ptr, (unsigned)second, | |
266 | (const struct timespec __user *) fifth); | |
267 | goto out; | |
268 | case SEMGET: | |
269 | err = sys_semget(first, (int)second, (int)third); | |
270 | goto out; | |
271 | case SEMCTL: { | |
272 | union semun fourth; | |
273 | err = -EINVAL; | |
274 | if (!ptr) | |
275 | goto out; | |
276 | err = -EFAULT; | |
277 | if (get_user(fourth.__pad, | |
278 | (void __user * __user *) ptr)) | |
279 | goto out; | |
280 | err = sys_semctl(first, (int)second | IPC_64, | |
281 | (int)third, fourth); | |
282 | goto out; | |
283 | } | |
284 | default: | |
285 | err = -ENOSYS; | |
286 | goto out; | |
287 | }; | |
288 | } | |
289 | if (call <= MSGCTL) { | |
290 | switch (call) { | |
291 | case MSGSND: | |
292 | err = sys_msgsnd(first, ptr, (size_t)second, | |
293 | (int)third); | |
294 | goto out; | |
295 | case MSGRCV: | |
296 | err = sys_msgrcv(first, ptr, (size_t)second, fifth, | |
297 | (int)third); | |
298 | goto out; | |
299 | case MSGGET: | |
300 | err = sys_msgget((key_t)first, (int)second); | |
301 | goto out; | |
302 | case MSGCTL: | |
303 | err = sys_msgctl(first, (int)second | IPC_64, ptr); | |
304 | goto out; | |
305 | default: | |
306 | err = -ENOSYS; | |
307 | goto out; | |
308 | }; | |
309 | } | |
310 | if (call <= SHMCTL) { | |
311 | switch (call) { | |
312 | case SHMAT: { | |
313 | ulong raddr; | |
314 | err = do_shmat(first, ptr, (int)second, &raddr); | |
315 | if (!err) { | |
316 | if (put_user(raddr, | |
317 | (ulong __user *) third)) | |
318 | err = -EFAULT; | |
319 | } | |
320 | goto out; | |
321 | } | |
322 | case SHMDT: | |
323 | err = sys_shmdt(ptr); | |
324 | goto out; | |
325 | case SHMGET: | |
326 | err = sys_shmget(first, (size_t)second, (int)third); | |
327 | goto out; | |
328 | case SHMCTL: | |
329 | err = sys_shmctl(first, (int)second | IPC_64, ptr); | |
330 | goto out; | |
331 | default: | |
332 | err = -ENOSYS; | |
333 | goto out; | |
334 | }; | |
335 | } else { | |
336 | err = -ENOSYS; | |
337 | } | |
338 | out: | |
339 | return err; | |
340 | } | |
341 | ||
342 | asmlinkage long sparc64_newuname(struct new_utsname __user *name) | |
343 | { | |
344 | int ret = sys_newuname(name); | |
345 | ||
346 | if (current->personality == PER_LINUX32 && !ret) { | |
347 | ret = (copy_to_user(name->machine, "sparc\0\0", 8) | |
348 | ? -EFAULT : 0); | |
349 | } | |
350 | return ret; | |
351 | } | |
352 | ||
353 | asmlinkage long sparc64_personality(unsigned long personality) | |
354 | { | |
355 | int ret; | |
356 | ||
357 | if (current->personality == PER_LINUX32 && | |
358 | personality == PER_LINUX) | |
359 | personality = PER_LINUX32; | |
360 | ret = sys_personality(personality); | |
361 | if (ret == PER_LINUX32) | |
362 | ret = PER_LINUX; | |
363 | ||
364 | return ret; | |
365 | } | |
366 | ||
367 | /* Linux version of mmap */ | |
368 | asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, | |
369 | unsigned long prot, unsigned long flags, unsigned long fd, | |
370 | unsigned long off) | |
371 | { | |
372 | struct file * file = NULL; | |
373 | unsigned long retval = -EBADF; | |
374 | ||
375 | if (!(flags & MAP_ANONYMOUS)) { | |
376 | file = fget(fd); | |
377 | if (!file) | |
378 | goto out; | |
379 | } | |
380 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
381 | len = PAGE_ALIGN(len); | |
382 | retval = -EINVAL; | |
383 | ||
384 | if (test_thread_flag(TIF_32BIT)) { | |
8bcd1741 DM |
385 | if (len >= 0xf0000000UL) |
386 | goto out_putf; | |
387 | ||
388 | if ((flags & MAP_FIXED) && addr > 0xf0000000UL - len) | |
1da177e4 LT |
389 | goto out_putf; |
390 | } else { | |
8bcd1741 DM |
391 | if (len >= VA_EXCLUDE_START) |
392 | goto out_putf; | |
393 | ||
394 | if ((flags & MAP_FIXED) && invalid_64bit_range(addr, len)) | |
1da177e4 LT |
395 | goto out_putf; |
396 | } | |
397 | ||
398 | down_write(¤t->mm->mmap_sem); | |
399 | retval = do_mmap(file, addr, len, prot, flags, off); | |
400 | up_write(¤t->mm->mmap_sem); | |
401 | ||
402 | out_putf: | |
403 | if (file) | |
404 | fput(file); | |
405 | out: | |
406 | return retval; | |
407 | } | |
408 | ||
409 | asmlinkage long sys64_munmap(unsigned long addr, size_t len) | |
410 | { | |
411 | long ret; | |
412 | ||
8bcd1741 | 413 | if (invalid_64bit_range(addr, len)) |
1da177e4 | 414 | return -EINVAL; |
8bcd1741 | 415 | |
1da177e4 LT |
416 | down_write(¤t->mm->mmap_sem); |
417 | ret = do_munmap(current->mm, addr, len); | |
418 | up_write(¤t->mm->mmap_sem); | |
419 | return ret; | |
420 | } | |
421 | ||
422 | extern unsigned long do_mremap(unsigned long addr, | |
423 | unsigned long old_len, unsigned long new_len, | |
424 | unsigned long flags, unsigned long new_addr); | |
425 | ||
426 | asmlinkage unsigned long sys64_mremap(unsigned long addr, | |
427 | unsigned long old_len, unsigned long new_len, | |
428 | unsigned long flags, unsigned long new_addr) | |
429 | { | |
430 | struct vm_area_struct *vma; | |
431 | unsigned long ret = -EINVAL; | |
8bcd1741 | 432 | |
1da177e4 LT |
433 | if (test_thread_flag(TIF_32BIT)) |
434 | goto out; | |
8bcd1741 | 435 | if (unlikely(new_len >= VA_EXCLUDE_START)) |
1da177e4 | 436 | goto out; |
8bcd1741 | 437 | if (unlikely(invalid_64bit_range(addr, old_len))) |
1da177e4 | 438 | goto out; |
8bcd1741 | 439 | |
1da177e4 LT |
440 | down_write(¤t->mm->mmap_sem); |
441 | if (flags & MREMAP_FIXED) { | |
8bcd1741 | 442 | if (invalid_64bit_range(new_addr, new_len)) |
1da177e4 | 443 | goto out_sem; |
8bcd1741 | 444 | } else if (invalid_64bit_range(addr, new_len)) { |
1da177e4 LT |
445 | unsigned long map_flags = 0; |
446 | struct file *file = NULL; | |
447 | ||
448 | ret = -ENOMEM; | |
449 | if (!(flags & MREMAP_MAYMOVE)) | |
450 | goto out_sem; | |
451 | ||
452 | vma = find_vma(current->mm, addr); | |
453 | if (vma) { | |
454 | if (vma->vm_flags & VM_SHARED) | |
455 | map_flags |= MAP_SHARED; | |
456 | file = vma->vm_file; | |
457 | } | |
458 | ||
459 | /* MREMAP_FIXED checked above. */ | |
460 | new_addr = get_unmapped_area(file, addr, new_len, | |
461 | vma ? vma->vm_pgoff : 0, | |
462 | map_flags); | |
463 | ret = new_addr; | |
464 | if (new_addr & ~PAGE_MASK) | |
465 | goto out_sem; | |
466 | flags |= MREMAP_FIXED; | |
467 | } | |
468 | ret = do_mremap(addr, old_len, new_len, flags, new_addr); | |
469 | out_sem: | |
470 | up_write(¤t->mm->mmap_sem); | |
471 | out: | |
472 | return ret; | |
473 | } | |
474 | ||
475 | /* we come to here via sys_nis_syscall so it can setup the regs argument */ | |
476 | asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs) | |
477 | { | |
478 | static int count; | |
479 | ||
480 | /* Don't make the system unusable, if someone goes stuck */ | |
481 | if (count++ > 5) | |
482 | return -ENOSYS; | |
483 | ||
484 | printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]); | |
485 | #ifdef DEBUG_UNIMP_SYSCALL | |
486 | show_regs (regs); | |
487 | #endif | |
488 | ||
489 | return -ENOSYS; | |
490 | } | |
491 | ||
492 | /* #define DEBUG_SPARC_BREAKPOINT */ | |
493 | ||
494 | asmlinkage void sparc_breakpoint(struct pt_regs *regs) | |
495 | { | |
496 | siginfo_t info; | |
497 | ||
498 | if (test_thread_flag(TIF_32BIT)) { | |
499 | regs->tpc &= 0xffffffff; | |
500 | regs->tnpc &= 0xffffffff; | |
501 | } | |
502 | #ifdef DEBUG_SPARC_BREAKPOINT | |
503 | printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc); | |
504 | #endif | |
505 | info.si_signo = SIGTRAP; | |
506 | info.si_errno = 0; | |
507 | info.si_code = TRAP_BRKPT; | |
508 | info.si_addr = (void __user *)regs->tpc; | |
509 | info.si_trapno = 0; | |
510 | force_sig_info(SIGTRAP, &info, current); | |
511 | #ifdef DEBUG_SPARC_BREAKPOINT | |
512 | printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc); | |
513 | #endif | |
514 | } | |
515 | ||
516 | extern void check_pending(int signum); | |
517 | ||
518 | asmlinkage long sys_getdomainname(char __user *name, int len) | |
519 | { | |
520 | int nlen; | |
521 | int err = -EFAULT; | |
522 | ||
523 | down_read(&uts_sem); | |
524 | ||
525 | nlen = strlen(system_utsname.domainname) + 1; | |
526 | ||
527 | if (nlen < len) | |
528 | len = nlen; | |
529 | if (len > __NEW_UTS_LEN) | |
530 | goto done; | |
531 | if (copy_to_user(name, system_utsname.domainname, len)) | |
532 | goto done; | |
533 | err = 0; | |
534 | done: | |
535 | up_read(&uts_sem); | |
536 | return err; | |
537 | } | |
538 | ||
539 | asmlinkage long solaris_syscall(struct pt_regs *regs) | |
540 | { | |
541 | static int count; | |
542 | ||
543 | regs->tpc = regs->tnpc; | |
544 | regs->tnpc += 4; | |
545 | if (test_thread_flag(TIF_32BIT)) { | |
546 | regs->tpc &= 0xffffffff; | |
547 | regs->tnpc &= 0xffffffff; | |
548 | } | |
549 | if (++count <= 5) { | |
550 | printk ("For Solaris binary emulation you need solaris module loaded\n"); | |
551 | show_regs (regs); | |
552 | } | |
553 | send_sig(SIGSEGV, current, 1); | |
554 | ||
555 | return -ENOSYS; | |
556 | } | |
557 | ||
558 | #ifndef CONFIG_SUNOS_EMUL | |
559 | asmlinkage long sunos_syscall(struct pt_regs *regs) | |
560 | { | |
561 | static int count; | |
562 | ||
563 | regs->tpc = regs->tnpc; | |
564 | regs->tnpc += 4; | |
565 | if (test_thread_flag(TIF_32BIT)) { | |
566 | regs->tpc &= 0xffffffff; | |
567 | regs->tnpc &= 0xffffffff; | |
568 | } | |
569 | if (++count <= 20) | |
570 | printk ("SunOS binary emulation not compiled in\n"); | |
571 | force_sig(SIGSEGV, current); | |
572 | ||
573 | return -ENOSYS; | |
574 | } | |
575 | #endif | |
576 | ||
577 | asmlinkage long sys_utrap_install(utrap_entry_t type, | |
578 | utrap_handler_t new_p, | |
579 | utrap_handler_t new_d, | |
580 | utrap_handler_t __user *old_p, | |
581 | utrap_handler_t __user *old_d) | |
582 | { | |
583 | if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31) | |
584 | return -EINVAL; | |
585 | if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) { | |
586 | if (old_p) { | |
587 | if (!current_thread_info()->utraps) { | |
588 | if (put_user(NULL, old_p)) | |
589 | return -EFAULT; | |
590 | } else { | |
591 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
592 | return -EFAULT; | |
593 | } | |
594 | } | |
595 | if (old_d) { | |
596 | if (put_user(NULL, old_d)) | |
597 | return -EFAULT; | |
598 | } | |
599 | return 0; | |
600 | } | |
601 | if (!current_thread_info()->utraps) { | |
602 | current_thread_info()->utraps = | |
9132983a | 603 | kzalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL); |
1da177e4 LT |
604 | if (!current_thread_info()->utraps) |
605 | return -ENOMEM; | |
606 | current_thread_info()->utraps[0] = 1; | |
1da177e4 LT |
607 | } else { |
608 | if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p && | |
609 | current_thread_info()->utraps[0] > 1) { | |
610 | long *p = current_thread_info()->utraps; | |
611 | ||
612 | current_thread_info()->utraps = | |
613 | kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), | |
614 | GFP_KERNEL); | |
615 | if (!current_thread_info()->utraps) { | |
616 | current_thread_info()->utraps = p; | |
617 | return -ENOMEM; | |
618 | } | |
619 | p[0]--; | |
620 | current_thread_info()->utraps[0] = 1; | |
621 | memcpy(current_thread_info()->utraps+1, p+1, | |
622 | UT_TRAP_INSTRUCTION_31*sizeof(long)); | |
623 | } | |
624 | } | |
625 | if (old_p) { | |
626 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
627 | return -EFAULT; | |
628 | } | |
629 | if (old_d) { | |
630 | if (put_user(NULL, old_d)) | |
631 | return -EFAULT; | |
632 | } | |
633 | current_thread_info()->utraps[type] = (long)new_p; | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
638 | long sparc_memory_ordering(unsigned long model, struct pt_regs *regs) | |
639 | { | |
640 | if (model >= 3) | |
641 | return -EINVAL; | |
642 | regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14); | |
643 | return 0; | |
644 | } | |
645 | ||
646 | asmlinkage long sys_rt_sigaction(int sig, | |
647 | const struct sigaction __user *act, | |
648 | struct sigaction __user *oact, | |
649 | void __user *restorer, | |
650 | size_t sigsetsize) | |
651 | { | |
652 | struct k_sigaction new_ka, old_ka; | |
653 | int ret; | |
654 | ||
655 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
656 | if (sigsetsize != sizeof(sigset_t)) | |
657 | return -EINVAL; | |
658 | ||
659 | if (act) { | |
660 | new_ka.ka_restorer = restorer; | |
661 | if (copy_from_user(&new_ka.sa, act, sizeof(*act))) | |
662 | return -EFAULT; | |
663 | } | |
664 | ||
665 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
666 | ||
667 | if (!ret && oact) { | |
668 | if (copy_to_user(oact, &old_ka.sa, sizeof(*oact))) | |
669 | return -EFAULT; | |
670 | } | |
671 | ||
672 | return ret; | |
673 | } | |
674 | ||
675 | /* Invoked by rtrap code to update performance counters in | |
676 | * user space. | |
677 | */ | |
678 | asmlinkage void update_perfctrs(void) | |
679 | { | |
680 | unsigned long pic, tmp; | |
681 | ||
682 | read_pic(pic); | |
683 | tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic); | |
684 | __put_user(tmp, current_thread_info()->user_cntd0); | |
685 | tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32)); | |
686 | __put_user(tmp, current_thread_info()->user_cntd1); | |
687 | reset_pic(); | |
688 | } | |
689 | ||
690 | asmlinkage long sys_perfctr(int opcode, unsigned long arg0, unsigned long arg1, unsigned long arg2) | |
691 | { | |
692 | int err = 0; | |
693 | ||
694 | switch(opcode) { | |
695 | case PERFCTR_ON: | |
696 | current_thread_info()->pcr_reg = arg2; | |
697 | current_thread_info()->user_cntd0 = (u64 __user *) arg0; | |
698 | current_thread_info()->user_cntd1 = (u64 __user *) arg1; | |
699 | current_thread_info()->kernel_cntd0 = | |
700 | current_thread_info()->kernel_cntd1 = 0; | |
701 | write_pcr(arg2); | |
702 | reset_pic(); | |
703 | set_thread_flag(TIF_PERFCTR); | |
704 | break; | |
705 | ||
706 | case PERFCTR_OFF: | |
707 | err = -EINVAL; | |
708 | if (test_thread_flag(TIF_PERFCTR)) { | |
709 | current_thread_info()->user_cntd0 = | |
710 | current_thread_info()->user_cntd1 = NULL; | |
711 | current_thread_info()->pcr_reg = 0; | |
712 | write_pcr(0); | |
713 | clear_thread_flag(TIF_PERFCTR); | |
714 | err = 0; | |
715 | } | |
716 | break; | |
717 | ||
718 | case PERFCTR_READ: { | |
719 | unsigned long pic, tmp; | |
720 | ||
721 | if (!test_thread_flag(TIF_PERFCTR)) { | |
722 | err = -EINVAL; | |
723 | break; | |
724 | } | |
725 | read_pic(pic); | |
726 | tmp = (current_thread_info()->kernel_cntd0 += (unsigned int)pic); | |
727 | err |= __put_user(tmp, current_thread_info()->user_cntd0); | |
728 | tmp = (current_thread_info()->kernel_cntd1 += (pic >> 32)); | |
729 | err |= __put_user(tmp, current_thread_info()->user_cntd1); | |
730 | reset_pic(); | |
731 | break; | |
732 | } | |
733 | ||
734 | case PERFCTR_CLRPIC: | |
735 | if (!test_thread_flag(TIF_PERFCTR)) { | |
736 | err = -EINVAL; | |
737 | break; | |
738 | } | |
739 | current_thread_info()->kernel_cntd0 = | |
740 | current_thread_info()->kernel_cntd1 = 0; | |
741 | reset_pic(); | |
742 | break; | |
743 | ||
744 | case PERFCTR_SETPCR: { | |
745 | u64 __user *user_pcr = (u64 __user *)arg0; | |
746 | ||
747 | if (!test_thread_flag(TIF_PERFCTR)) { | |
748 | err = -EINVAL; | |
749 | break; | |
750 | } | |
751 | err |= __get_user(current_thread_info()->pcr_reg, user_pcr); | |
752 | write_pcr(current_thread_info()->pcr_reg); | |
753 | current_thread_info()->kernel_cntd0 = | |
754 | current_thread_info()->kernel_cntd1 = 0; | |
755 | reset_pic(); | |
756 | break; | |
757 | } | |
758 | ||
759 | case PERFCTR_GETPCR: { | |
760 | u64 __user *user_pcr = (u64 __user *)arg0; | |
761 | ||
762 | if (!test_thread_flag(TIF_PERFCTR)) { | |
763 | err = -EINVAL; | |
764 | break; | |
765 | } | |
766 | err |= __put_user(current_thread_info()->pcr_reg, user_pcr); | |
767 | break; | |
768 | } | |
769 | ||
770 | default: | |
771 | err = -EINVAL; | |
772 | break; | |
773 | }; | |
774 | return err; | |
775 | } |