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