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> |
066bcaca | 26 | #include <linux/export.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 | ||
a91690dd DM |
69 | /* These functions differ from the default implementations in |
70 | * mm/mmap.c in two ways: | |
71 | * | |
72 | * 1) For file backed MAP_SHARED mmap()'s we D-cache color align, | |
73 | * for fixed such mappings we just validate what the user gave us. | |
74 | * 2) For 64-bit tasks we avoid mapping anything within 4GB of | |
75 | * the spitfire/niagara VA-hole. | |
76 | */ | |
77 | ||
748ba883 | 78 | static inline unsigned long COLOR_ALIGN(unsigned long addr, |
a91690dd DM |
79 | unsigned long pgoff) |
80 | { | |
81 | unsigned long base = (addr+SHMLBA-1)&~(SHMLBA-1); | |
82 | unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1); | |
83 | ||
84 | return base + off; | |
85 | } | |
86 | ||
1da177e4 LT |
87 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) |
88 | { | |
89 | struct mm_struct *mm = current->mm; | |
90 | struct vm_area_struct * vma; | |
91 | unsigned long task_size = TASK_SIZE; | |
1da177e4 | 92 | int do_color_align; |
bb64f550 | 93 | struct vm_unmapped_area_info info; |
1da177e4 LT |
94 | |
95 | if (flags & MAP_FIXED) { | |
96 | /* We do not accept a shared mapping if it would violate | |
97 | * cache aliasing constraints. | |
98 | */ | |
99 | if ((flags & MAP_SHARED) && | |
100 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
101 | return -EINVAL; | |
102 | return addr; | |
103 | } | |
104 | ||
105 | if (test_thread_flag(TIF_32BIT)) | |
d61e16df | 106 | task_size = STACK_TOP32; |
a91690dd | 107 | if (unlikely(len > task_size || len >= VA_EXCLUDE_START)) |
1da177e4 LT |
108 | return -ENOMEM; |
109 | ||
110 | do_color_align = 0; | |
111 | if (filp || (flags & MAP_SHARED)) | |
112 | do_color_align = 1; | |
113 | ||
114 | if (addr) { | |
115 | if (do_color_align) | |
748ba883 | 116 | addr = COLOR_ALIGN(addr, pgoff); |
1da177e4 LT |
117 | else |
118 | addr = PAGE_ALIGN(addr); | |
119 | ||
120 | vma = find_vma(mm, addr); | |
121 | if (task_size - len >= addr && | |
122 | (!vma || addr + len <= vma->vm_start)) | |
123 | return addr; | |
124 | } | |
125 | ||
bb64f550 ML |
126 | info.flags = 0; |
127 | info.length = len; | |
128 | info.low_limit = TASK_UNMAPPED_BASE; | |
129 | info.high_limit = min(task_size, VA_EXCLUDE_START); | |
130 | info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0; | |
131 | info.align_offset = pgoff << PAGE_SHIFT; | |
132 | addr = vm_unmapped_area(&info); | |
133 | ||
134 | if ((addr & ~PAGE_MASK) && task_size > VA_EXCLUDE_END) { | |
135 | VM_BUG_ON(addr != -ENOMEM); | |
136 | info.low_limit = VA_EXCLUDE_END; | |
137 | info.high_limit = task_size; | |
138 | addr = vm_unmapped_area(&info); | |
1363c3cd | 139 | } |
1da177e4 | 140 | |
bb64f550 | 141 | return addr; |
1da177e4 LT |
142 | } |
143 | ||
a91690dd DM |
144 | unsigned long |
145 | arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, | |
146 | const unsigned long len, const unsigned long pgoff, | |
147 | const unsigned long flags) | |
148 | { | |
149 | struct vm_area_struct *vma; | |
150 | struct mm_struct *mm = current->mm; | |
d61e16df | 151 | unsigned long task_size = STACK_TOP32; |
a91690dd DM |
152 | unsigned long addr = addr0; |
153 | int do_color_align; | |
bb64f550 | 154 | struct vm_unmapped_area_info info; |
a91690dd DM |
155 | |
156 | /* This should only ever run for 32-bit processes. */ | |
157 | BUG_ON(!test_thread_flag(TIF_32BIT)); | |
158 | ||
159 | if (flags & MAP_FIXED) { | |
160 | /* We do not accept a shared mapping if it would violate | |
161 | * cache aliasing constraints. | |
162 | */ | |
163 | if ((flags & MAP_SHARED) && | |
164 | ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) | |
165 | return -EINVAL; | |
166 | return addr; | |
167 | } | |
168 | ||
169 | if (unlikely(len > task_size)) | |
170 | return -ENOMEM; | |
171 | ||
172 | do_color_align = 0; | |
173 | if (filp || (flags & MAP_SHARED)) | |
174 | do_color_align = 1; | |
175 | ||
176 | /* requesting a specific address */ | |
177 | if (addr) { | |
178 | if (do_color_align) | |
748ba883 | 179 | addr = COLOR_ALIGN(addr, pgoff); |
a91690dd DM |
180 | else |
181 | addr = PAGE_ALIGN(addr); | |
182 | ||
183 | vma = find_vma(mm, addr); | |
184 | if (task_size - len >= addr && | |
185 | (!vma || addr + len <= vma->vm_start)) | |
186 | return addr; | |
187 | } | |
188 | ||
bb64f550 ML |
189 | info.flags = VM_UNMAPPED_AREA_TOPDOWN; |
190 | info.length = len; | |
191 | info.low_limit = PAGE_SIZE; | |
192 | info.high_limit = mm->mmap_base; | |
193 | info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0; | |
194 | info.align_offset = pgoff << PAGE_SHIFT; | |
195 | addr = vm_unmapped_area(&info); | |
a91690dd | 196 | |
a91690dd DM |
197 | /* |
198 | * A failed mmap() very likely causes application failure, | |
199 | * so fall back to the bottom-up function here. This scenario | |
200 | * can happen with large stack limits and large mmap() | |
201 | * allocations. | |
202 | */ | |
bb64f550 ML |
203 | if (addr & ~PAGE_MASK) { |
204 | VM_BUG_ON(addr != -ENOMEM); | |
205 | info.flags = 0; | |
206 | info.low_limit = TASK_UNMAPPED_BASE; | |
207 | info.high_limit = STACK_TOP32; | |
208 | addr = vm_unmapped_area(&info); | |
209 | } | |
a91690dd DM |
210 | |
211 | return addr; | |
212 | } | |
213 | ||
1da177e4 LT |
214 | /* Try to align mapping such that we align it as much as possible. */ |
215 | unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags) | |
216 | { | |
217 | unsigned long align_goal, addr = -ENOMEM; | |
c4caa778 AV |
218 | unsigned long (*get_area)(struct file *, unsigned long, |
219 | unsigned long, unsigned long, unsigned long); | |
220 | ||
221 | get_area = current->mm->get_unmapped_area; | |
1da177e4 LT |
222 | |
223 | if (flags & MAP_FIXED) { | |
224 | /* Ok, don't mess with it. */ | |
c4caa778 | 225 | return get_area(NULL, orig_addr, len, pgoff, flags); |
1da177e4 LT |
226 | } |
227 | flags &= ~MAP_SHARED; | |
228 | ||
229 | align_goal = PAGE_SIZE; | |
230 | if (len >= (4UL * 1024 * 1024)) | |
231 | align_goal = (4UL * 1024 * 1024); | |
232 | else if (len >= (512UL * 1024)) | |
233 | align_goal = (512UL * 1024); | |
234 | else if (len >= (64UL * 1024)) | |
235 | align_goal = (64UL * 1024); | |
236 | ||
237 | do { | |
c4caa778 | 238 | addr = get_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags); |
1da177e4 LT |
239 | if (!(addr & ~PAGE_MASK)) { |
240 | addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL); | |
241 | break; | |
242 | } | |
243 | ||
244 | if (align_goal == (4UL * 1024 * 1024)) | |
245 | align_goal = (512UL * 1024); | |
246 | else if (align_goal == (512UL * 1024)) | |
247 | align_goal = (64UL * 1024); | |
248 | else | |
249 | align_goal = PAGE_SIZE; | |
250 | } while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE); | |
251 | ||
252 | /* Mapping is smaller than 64K or larger areas could not | |
253 | * be obtained. | |
254 | */ | |
255 | if (addr & ~PAGE_MASK) | |
c4caa778 | 256 | addr = get_area(NULL, orig_addr, len, pgoff, flags); |
1da177e4 LT |
257 | |
258 | return addr; | |
259 | } | |
917c3660 | 260 | EXPORT_SYMBOL(get_fb_unmapped_area); |
1da177e4 | 261 | |
5a0efea0 DM |
262 | /* Essentially the same as PowerPC. */ |
263 | static unsigned long mmap_rnd(void) | |
a91690dd | 264 | { |
5a0efea0 | 265 | unsigned long rnd = 0UL; |
05f9ca83 DM |
266 | |
267 | if (current->flags & PF_RANDOMIZE) { | |
5a0efea0 | 268 | unsigned long val = get_random_int(); |
05f9ca83 | 269 | if (test_thread_flag(TIF_32BIT)) |
fa8cbaaf | 270 | rnd = (val % (1UL << (23UL-PAGE_SHIFT))); |
05f9ca83 | 271 | else |
fa8cbaaf | 272 | rnd = (val % (1UL << (30UL-PAGE_SHIFT))); |
05f9ca83 | 273 | } |
fa8cbaaf | 274 | return rnd << PAGE_SHIFT; |
5a0efea0 DM |
275 | } |
276 | ||
277 | void arch_pick_mmap_layout(struct mm_struct *mm) | |
278 | { | |
279 | unsigned long random_factor = mmap_rnd(); | |
280 | unsigned long gap; | |
05f9ca83 | 281 | |
a91690dd DM |
282 | /* |
283 | * Fall back to the standard layout if the personality | |
284 | * bit is set, or if the expected stack growth is unlimited: | |
285 | */ | |
76704fb5 | 286 | gap = rlimit(RLIMIT_STACK); |
a91690dd DM |
287 | if (!test_thread_flag(TIF_32BIT) || |
288 | (current->personality & ADDR_COMPAT_LAYOUT) || | |
76704fb5 | 289 | gap == RLIM_INFINITY || |
a91690dd | 290 | sysctl_legacy_va_layout) { |
05f9ca83 | 291 | mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; |
a91690dd DM |
292 | mm->get_unmapped_area = arch_get_unmapped_area; |
293 | mm->unmap_area = arch_unmap_area; | |
294 | } else { | |
295 | /* We know it's 32-bit */ | |
d61e16df | 296 | unsigned long task_size = STACK_TOP32; |
a91690dd | 297 | |
a91690dd DM |
298 | if (gap < 128 * 1024 * 1024) |
299 | gap = 128 * 1024 * 1024; | |
300 | if (gap > (task_size / 6 * 5)) | |
301 | gap = (task_size / 6 * 5); | |
302 | ||
05f9ca83 | 303 | mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor); |
a91690dd DM |
304 | mm->get_unmapped_area = arch_get_unmapped_area_topdown; |
305 | mm->unmap_area = arch_unmap_area_topdown; | |
306 | } | |
307 | } | |
308 | ||
1da177e4 LT |
309 | /* |
310 | * sys_pipe() is the normal C calling standard for creating | |
311 | * a pipe. It's not the way unix traditionally does this, though. | |
312 | */ | |
e4265019 | 313 | SYSCALL_DEFINE1(sparc_pipe_real, struct pt_regs *, regs) |
1da177e4 LT |
314 | { |
315 | int fd[2]; | |
316 | int error; | |
317 | ||
ed8cae8b | 318 | error = do_pipe_flags(fd, 0); |
1da177e4 LT |
319 | if (error) |
320 | goto out; | |
321 | regs->u_regs[UREG_I1] = fd[1]; | |
322 | error = fd[0]; | |
323 | out: | |
324 | return error; | |
325 | } | |
326 | ||
327 | /* | |
328 | * sys_ipc() is the de-multiplexer for the SysV IPC calls.. | |
329 | * | |
330 | * This is really horribly ugly. | |
331 | */ | |
332 | ||
baed7fc9 | 333 | SYSCALL_DEFINE6(sparc_ipc, unsigned int, call, int, first, unsigned long, second, |
e4265019 | 334 | unsigned long, third, void __user *, ptr, long, fifth) |
1da177e4 | 335 | { |
7379b42b | 336 | long err; |
1da177e4 LT |
337 | |
338 | /* No need for backward compatibility. We can start fresh... */ | |
339 | if (call <= SEMCTL) { | |
340 | switch (call) { | |
341 | case SEMOP: | |
342 | err = sys_semtimedop(first, ptr, | |
343 | (unsigned)second, NULL); | |
344 | goto out; | |
345 | case SEMTIMEDOP: | |
346 | err = sys_semtimedop(first, ptr, (unsigned)second, | |
207ddd0a DM |
347 | (const struct timespec __user *) |
348 | (unsigned long) fifth); | |
1da177e4 LT |
349 | goto out; |
350 | case SEMGET: | |
351 | err = sys_semget(first, (int)second, (int)third); | |
352 | goto out; | |
353 | case SEMCTL: { | |
020cfb05 DM |
354 | err = sys_semctl(first, second, |
355 | (int)third | IPC_64, | |
7379b42b | 356 | (union semun) ptr); |
1da177e4 LT |
357 | goto out; |
358 | } | |
359 | default: | |
360 | err = -ENOSYS; | |
361 | goto out; | |
6cb79b3f | 362 | } |
1da177e4 LT |
363 | } |
364 | if (call <= MSGCTL) { | |
365 | switch (call) { | |
366 | case MSGSND: | |
367 | err = sys_msgsnd(first, ptr, (size_t)second, | |
368 | (int)third); | |
369 | goto out; | |
370 | case MSGRCV: | |
371 | err = sys_msgrcv(first, ptr, (size_t)second, fifth, | |
372 | (int)third); | |
373 | goto out; | |
374 | case MSGGET: | |
375 | err = sys_msgget((key_t)first, (int)second); | |
376 | goto out; | |
377 | case MSGCTL: | |
378 | err = sys_msgctl(first, (int)second | IPC_64, ptr); | |
379 | goto out; | |
380 | default: | |
381 | err = -ENOSYS; | |
382 | goto out; | |
6cb79b3f | 383 | } |
1da177e4 LT |
384 | } |
385 | if (call <= SHMCTL) { | |
386 | switch (call) { | |
387 | case SHMAT: { | |
388 | ulong raddr; | |
079a96ae | 389 | err = do_shmat(first, ptr, (int)second, &raddr, SHMLBA); |
1da177e4 LT |
390 | if (!err) { |
391 | if (put_user(raddr, | |
392 | (ulong __user *) third)) | |
393 | err = -EFAULT; | |
394 | } | |
395 | goto out; | |
396 | } | |
397 | case SHMDT: | |
398 | err = sys_shmdt(ptr); | |
399 | goto out; | |
400 | case SHMGET: | |
401 | err = sys_shmget(first, (size_t)second, (int)third); | |
402 | goto out; | |
403 | case SHMCTL: | |
404 | err = sys_shmctl(first, (int)second | IPC_64, ptr); | |
405 | goto out; | |
406 | default: | |
407 | err = -ENOSYS; | |
408 | goto out; | |
6cb79b3f | 409 | } |
1da177e4 LT |
410 | } else { |
411 | err = -ENOSYS; | |
412 | } | |
413 | out: | |
414 | return err; | |
415 | } | |
416 | ||
e4265019 | 417 | SYSCALL_DEFINE1(sparc64_personality, unsigned long, personality) |
1da177e4 LT |
418 | { |
419 | int ret; | |
420 | ||
a27032ee JK |
421 | if (personality(current->personality) == PER_LINUX32 && |
422 | personality(personality) == PER_LINUX) | |
423 | personality |= PER_LINUX32; | |
1da177e4 | 424 | ret = sys_personality(personality); |
a27032ee JK |
425 | if (personality(ret) == PER_LINUX32) |
426 | ret &= ~PER_LINUX32; | |
1da177e4 LT |
427 | |
428 | return ret; | |
429 | } | |
430 | ||
f92ffa12 | 431 | int sparc_mmap_check(unsigned long addr, unsigned long len) |
3a459756 KK |
432 | { |
433 | if (test_thread_flag(TIF_32BIT)) { | |
434 | if (len >= STACK_TOP32) | |
435 | return -EINVAL; | |
436 | ||
58163393 | 437 | if (addr > STACK_TOP32 - len) |
3a459756 KK |
438 | return -EINVAL; |
439 | } else { | |
440 | if (len >= VA_EXCLUDE_START) | |
441 | return -EINVAL; | |
442 | ||
58163393 | 443 | if (invalid_64bit_range(addr, len)) |
3a459756 KK |
444 | return -EINVAL; |
445 | } | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
1da177e4 | 450 | /* Linux version of mmap */ |
e4265019 DM |
451 | SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, |
452 | unsigned long, prot, unsigned long, flags, unsigned long, fd, | |
453 | unsigned long, off) | |
1da177e4 | 454 | { |
f8b72560 | 455 | unsigned long retval = -EINVAL; |
1da177e4 | 456 | |
f8b72560 AV |
457 | if ((off + PAGE_ALIGN(len)) < off) |
458 | goto out; | |
459 | if (off & ~PAGE_MASK) | |
460 | goto out; | |
461 | retval = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); | |
1da177e4 LT |
462 | out: |
463 | return retval; | |
464 | } | |
465 | ||
e4265019 | 466 | SYSCALL_DEFINE2(64_munmap, unsigned long, addr, size_t, len) |
1da177e4 | 467 | { |
8bcd1741 | 468 | if (invalid_64bit_range(addr, len)) |
1da177e4 | 469 | return -EINVAL; |
8bcd1741 | 470 | |
bfce281c | 471 | return vm_munmap(addr, len); |
1da177e4 | 472 | } |
1da177e4 | 473 | |
e4265019 DM |
474 | SYSCALL_DEFINE5(64_mremap, unsigned long, addr, unsigned long, old_len, |
475 | unsigned long, new_len, unsigned long, flags, | |
476 | unsigned long, new_addr) | |
1da177e4 | 477 | { |
1da177e4 | 478 | if (test_thread_flag(TIF_32BIT)) |
657bec85 AV |
479 | return -EINVAL; |
480 | return sys_mremap(addr, old_len, new_len, flags, new_addr); | |
1da177e4 LT |
481 | } |
482 | ||
483 | /* we come to here via sys_nis_syscall so it can setup the regs argument */ | |
484 | asmlinkage unsigned long c_sys_nis_syscall(struct pt_regs *regs) | |
485 | { | |
486 | static int count; | |
487 | ||
488 | /* Don't make the system unusable, if someone goes stuck */ | |
489 | if (count++ > 5) | |
490 | return -ENOSYS; | |
491 | ||
492 | printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]); | |
493 | #ifdef DEBUG_UNIMP_SYSCALL | |
494 | show_regs (regs); | |
495 | #endif | |
496 | ||
497 | return -ENOSYS; | |
498 | } | |
499 | ||
500 | /* #define DEBUG_SPARC_BREAKPOINT */ | |
501 | ||
502 | asmlinkage void sparc_breakpoint(struct pt_regs *regs) | |
503 | { | |
504 | siginfo_t info; | |
505 | ||
506 | if (test_thread_flag(TIF_32BIT)) { | |
507 | regs->tpc &= 0xffffffff; | |
508 | regs->tnpc &= 0xffffffff; | |
509 | } | |
510 | #ifdef DEBUG_SPARC_BREAKPOINT | |
511 | printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc); | |
512 | #endif | |
513 | info.si_signo = SIGTRAP; | |
514 | info.si_errno = 0; | |
515 | info.si_code = TRAP_BRKPT; | |
516 | info.si_addr = (void __user *)regs->tpc; | |
517 | info.si_trapno = 0; | |
518 | force_sig_info(SIGTRAP, &info, current); | |
519 | #ifdef DEBUG_SPARC_BREAKPOINT | |
520 | printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc); | |
521 | #endif | |
522 | } | |
523 | ||
524 | extern void check_pending(int signum); | |
525 | ||
e4265019 | 526 | SYSCALL_DEFINE2(getdomainname, char __user *, name, int, len) |
1da177e4 | 527 | { |
8310a32c DM |
528 | int nlen, err; |
529 | ||
b9c54f91 | 530 | if (len < 0) |
8310a32c | 531 | return -EINVAL; |
1da177e4 LT |
532 | |
533 | down_read(&uts_sem); | |
534 | ||
e9ff3990 | 535 | nlen = strlen(utsname()->domainname) + 1; |
b9c54f91 AW |
536 | err = -EINVAL; |
537 | if (nlen > len) | |
538 | goto out; | |
8310a32c DM |
539 | |
540 | err = -EFAULT; | |
e9ff3990 | 541 | if (!copy_to_user(name, utsname()->domainname, nlen)) |
8310a32c DM |
542 | err = 0; |
543 | ||
b9c54f91 | 544 | out: |
1da177e4 LT |
545 | up_read(&uts_sem); |
546 | return err; | |
547 | } | |
548 | ||
e4265019 DM |
549 | SYSCALL_DEFINE5(utrap_install, utrap_entry_t, type, |
550 | utrap_handler_t, new_p, utrap_handler_t, new_d, | |
551 | utrap_handler_t __user *, old_p, | |
552 | utrap_handler_t __user *, old_d) | |
1da177e4 LT |
553 | { |
554 | if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31) | |
555 | return -EINVAL; | |
556 | if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) { | |
557 | if (old_p) { | |
558 | if (!current_thread_info()->utraps) { | |
559 | if (put_user(NULL, old_p)) | |
560 | return -EFAULT; | |
561 | } else { | |
562 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
563 | return -EFAULT; | |
564 | } | |
565 | } | |
566 | if (old_d) { | |
567 | if (put_user(NULL, old_d)) | |
568 | return -EFAULT; | |
569 | } | |
570 | return 0; | |
571 | } | |
572 | if (!current_thread_info()->utraps) { | |
573 | current_thread_info()->utraps = | |
9132983a | 574 | kzalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL); |
1da177e4 LT |
575 | if (!current_thread_info()->utraps) |
576 | return -ENOMEM; | |
577 | current_thread_info()->utraps[0] = 1; | |
1da177e4 LT |
578 | } else { |
579 | if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p && | |
580 | current_thread_info()->utraps[0] > 1) { | |
207ddd0a | 581 | unsigned long *p = current_thread_info()->utraps; |
1da177e4 LT |
582 | |
583 | current_thread_info()->utraps = | |
584 | kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), | |
585 | GFP_KERNEL); | |
586 | if (!current_thread_info()->utraps) { | |
587 | current_thread_info()->utraps = p; | |
588 | return -ENOMEM; | |
589 | } | |
590 | p[0]--; | |
591 | current_thread_info()->utraps[0] = 1; | |
592 | memcpy(current_thread_info()->utraps+1, p+1, | |
593 | UT_TRAP_INSTRUCTION_31*sizeof(long)); | |
594 | } | |
595 | } | |
596 | if (old_p) { | |
597 | if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p)) | |
598 | return -EFAULT; | |
599 | } | |
600 | if (old_d) { | |
601 | if (put_user(NULL, old_d)) | |
602 | return -EFAULT; | |
603 | } | |
604 | current_thread_info()->utraps[type] = (long)new_p; | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
207ddd0a DM |
609 | asmlinkage long sparc_memory_ordering(unsigned long model, |
610 | struct pt_regs *regs) | |
1da177e4 LT |
611 | { |
612 | if (model >= 3) | |
613 | return -EINVAL; | |
614 | regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14); | |
615 | return 0; | |
616 | } | |
617 | ||
e4265019 DM |
618 | SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act, |
619 | struct sigaction __user *, oact, void __user *, restorer, | |
620 | size_t, sigsetsize) | |
1da177e4 LT |
621 | { |
622 | struct k_sigaction new_ka, old_ka; | |
623 | int ret; | |
624 | ||
625 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
626 | if (sigsetsize != sizeof(sigset_t)) | |
627 | return -EINVAL; | |
628 | ||
629 | if (act) { | |
630 | new_ka.ka_restorer = restorer; | |
631 | if (copy_from_user(&new_ka.sa, act, sizeof(*act))) | |
632 | return -EFAULT; | |
633 | } | |
634 | ||
635 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
636 | ||
637 | if (!ret && oact) { | |
638 | if (copy_to_user(oact, &old_ka.sa, sizeof(*oact))) | |
639 | return -EFAULT; | |
640 | } | |
641 | ||
642 | return ret; | |
643 | } | |
644 | ||
517ffce4 DM |
645 | asmlinkage long sys_kern_features(void) |
646 | { | |
647 | return KERN_FEATURE_MIXED_MODE_STACK; | |
648 | } |