Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* ptrace.c: Sparc process tracing support. |
2 | * | |
d09c2a23 | 3 | * Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
4 | * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
5 | * | |
6 | * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson, | |
7 | * and David Mosberger. | |
8 | * | |
9 | * Added Linux support -miguel (weird, eh?, the original code was meant | |
10 | * to emulate SunOS). | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/ptrace.h> | |
18 | #include <linux/user.h> | |
19 | #include <linux/smp.h> | |
20 | #include <linux/smp_lock.h> | |
21 | #include <linux/security.h> | |
f7ceba36 DM |
22 | #include <linux/seccomp.h> |
23 | #include <linux/audit.h> | |
7ed20e1a | 24 | #include <linux/signal.h> |
d09c2a23 | 25 | #include <linux/regset.h> |
73ccefab | 26 | #include <linux/tracehook.h> |
d09c2a23 DM |
27 | #include <linux/compat.h> |
28 | #include <linux/elf.h> | |
1da177e4 LT |
29 | |
30 | #include <asm/asi.h> | |
31 | #include <asm/pgtable.h> | |
32 | #include <asm/system.h> | |
33 | #include <asm/uaccess.h> | |
34 | #include <asm/psrcompat.h> | |
35 | #include <asm/visasm.h> | |
36 | #include <asm/spitfire.h> | |
6a9b490d | 37 | #include <asm/page.h> |
717463d8 | 38 | #include <asm/cpudata.h> |
bfdf9ebc DM |
39 | #include <asm/cacheflush.h> |
40 | ||
41 | #include "entry.h" | |
1da177e4 | 42 | |
1da177e4 | 43 | /* #define ALLOW_INIT_TRACING */ |
1da177e4 LT |
44 | |
45 | /* | |
46 | * Called by kernel/ptrace.c when detaching.. | |
47 | * | |
48 | * Make sure single step bits etc are not set. | |
49 | */ | |
50 | void ptrace_disable(struct task_struct *child) | |
51 | { | |
52 | /* nothing to do */ | |
53 | } | |
54 | ||
dadeafdf DM |
55 | /* To get the necessary page struct, access_process_vm() first calls |
56 | * get_user_pages(). This has done a flush_dcache_page() on the | |
57 | * accessed page. Then our caller (copy_{to,from}_user_page()) did | |
58 | * to memcpy to read/write the data from that page. | |
59 | * | |
60 | * Now, the only thing we have to do is: | |
61 | * 1) flush the D-cache if it's possible than an illegal alias | |
62 | * has been created | |
63 | * 2) flush the I-cache if this is pre-cheetah and we did a write | |
64 | */ | |
65 | void flush_ptrace_access(struct vm_area_struct *vma, struct page *page, | |
66 | unsigned long uaddr, void *kaddr, | |
67 | unsigned long len, int write) | |
68 | { | |
69 | BUG_ON(len > PAGE_SIZE); | |
70 | ||
7adb37fe DM |
71 | if (tlb_type == hypervisor) |
72 | return; | |
73 | ||
f6a843d9 DM |
74 | preempt_disable(); |
75 | ||
dadeafdf DM |
76 | #ifdef DCACHE_ALIASING_POSSIBLE |
77 | /* If bit 13 of the kernel address we used to access the | |
78 | * user page is the same as the virtual address that page | |
79 | * is mapped to in the user's address space, we can skip the | |
80 | * D-cache flush. | |
81 | */ | |
6a9b490d | 82 | if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) { |
dadeafdf DM |
83 | unsigned long start = __pa(kaddr); |
84 | unsigned long end = start + len; | |
717463d8 DM |
85 | unsigned long dcache_line_size; |
86 | ||
87 | dcache_line_size = local_cpu_data().dcache_line_size; | |
dadeafdf DM |
88 | |
89 | if (tlb_type == spitfire) { | |
717463d8 | 90 | for (; start < end; start += dcache_line_size) |
6a9b490d | 91 | spitfire_put_dcache_tag(start & 0x3fe0, 0x0); |
dadeafdf | 92 | } else { |
717463d8 DM |
93 | start &= ~(dcache_line_size - 1); |
94 | for (; start < end; start += dcache_line_size) | |
dadeafdf DM |
95 | __asm__ __volatile__( |
96 | "stxa %%g0, [%0] %1\n\t" | |
97 | "membar #Sync" | |
98 | : /* no outputs */ | |
6a9b490d | 99 | : "r" (start), |
dadeafdf DM |
100 | "i" (ASI_DCACHE_INVALIDATE)); |
101 | } | |
102 | } | |
103 | #endif | |
104 | if (write && tlb_type == spitfire) { | |
105 | unsigned long start = (unsigned long) kaddr; | |
106 | unsigned long end = start + len; | |
717463d8 DM |
107 | unsigned long icache_line_size; |
108 | ||
109 | icache_line_size = local_cpu_data().icache_line_size; | |
dadeafdf | 110 | |
717463d8 | 111 | for (; start < end; start += icache_line_size) |
dadeafdf DM |
112 | flushi(start); |
113 | } | |
f6a843d9 DM |
114 | |
115 | preempt_enable(); | |
dadeafdf DM |
116 | } |
117 | ||
d786a4a6 DM |
118 | static int get_from_target(struct task_struct *target, unsigned long uaddr, |
119 | void *kbuf, int len) | |
120 | { | |
121 | if (target == current) { | |
122 | if (copy_from_user(kbuf, (void __user *) uaddr, len)) | |
123 | return -EFAULT; | |
124 | } else { | |
125 | int len2 = access_process_vm(target, uaddr, kbuf, len, 0); | |
126 | if (len2 != len) | |
127 | return -EFAULT; | |
128 | } | |
129 | return 0; | |
130 | } | |
131 | ||
132 | static int set_to_target(struct task_struct *target, unsigned long uaddr, | |
133 | void *kbuf, int len) | |
134 | { | |
135 | if (target == current) { | |
136 | if (copy_to_user((void __user *) uaddr, kbuf, len)) | |
137 | return -EFAULT; | |
138 | } else { | |
139 | int len2 = access_process_vm(target, uaddr, kbuf, len, 1); | |
140 | if (len2 != len) | |
141 | return -EFAULT; | |
142 | } | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static int regwindow64_get(struct task_struct *target, | |
147 | const struct pt_regs *regs, | |
148 | struct reg_window *wbuf) | |
149 | { | |
150 | unsigned long rw_addr = regs->u_regs[UREG_I6]; | |
151 | ||
152 | if (test_tsk_thread_flag(current, TIF_32BIT)) { | |
153 | struct reg_window32 win32; | |
154 | int i; | |
155 | ||
156 | if (get_from_target(target, rw_addr, &win32, sizeof(win32))) | |
157 | return -EFAULT; | |
158 | for (i = 0; i < 8; i++) | |
159 | wbuf->locals[i] = win32.locals[i]; | |
160 | for (i = 0; i < 8; i++) | |
161 | wbuf->ins[i] = win32.ins[i]; | |
162 | } else { | |
163 | rw_addr += STACK_BIAS; | |
164 | if (get_from_target(target, rw_addr, wbuf, sizeof(*wbuf))) | |
165 | return -EFAULT; | |
166 | } | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static int regwindow64_set(struct task_struct *target, | |
172 | const struct pt_regs *regs, | |
173 | struct reg_window *wbuf) | |
174 | { | |
175 | unsigned long rw_addr = regs->u_regs[UREG_I6]; | |
176 | ||
177 | if (test_tsk_thread_flag(current, TIF_32BIT)) { | |
178 | struct reg_window32 win32; | |
179 | int i; | |
180 | ||
181 | for (i = 0; i < 8; i++) | |
182 | win32.locals[i] = wbuf->locals[i]; | |
183 | for (i = 0; i < 8; i++) | |
184 | win32.ins[i] = wbuf->ins[i]; | |
185 | ||
186 | if (set_to_target(target, rw_addr, &win32, sizeof(win32))) | |
187 | return -EFAULT; | |
188 | } else { | |
189 | rw_addr += STACK_BIAS; | |
190 | if (set_to_target(target, rw_addr, wbuf, sizeof(*wbuf))) | |
191 | return -EFAULT; | |
192 | } | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
d09c2a23 DM |
197 | enum sparc_regset { |
198 | REGSET_GENERAL, | |
199 | REGSET_FP, | |
200 | }; | |
201 | ||
202 | static int genregs64_get(struct task_struct *target, | |
203 | const struct user_regset *regset, | |
204 | unsigned int pos, unsigned int count, | |
205 | void *kbuf, void __user *ubuf) | |
206 | { | |
207 | const struct pt_regs *regs = task_pt_regs(target); | |
208 | int ret; | |
209 | ||
210 | if (target == current) | |
211 | flushw_user(); | |
212 | ||
213 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
214 | regs->u_regs, | |
215 | 0, 16 * sizeof(u64)); | |
d786a4a6 DM |
216 | if (!ret && count && pos < (32 * sizeof(u64))) { |
217 | struct reg_window window; | |
d09c2a23 | 218 | |
d786a4a6 DM |
219 | if (regwindow64_get(target, regs, &window)) |
220 | return -EFAULT; | |
d09c2a23 | 221 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, |
d786a4a6 | 222 | &window, |
d09c2a23 DM |
223 | 16 * sizeof(u64), |
224 | 32 * sizeof(u64)); | |
225 | } | |
226 | ||
227 | if (!ret) { | |
228 | /* TSTATE, TPC, TNPC */ | |
229 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
230 | ®s->tstate, | |
231 | 32 * sizeof(u64), | |
232 | 35 * sizeof(u64)); | |
233 | } | |
234 | ||
235 | if (!ret) { | |
236 | unsigned long y = regs->y; | |
237 | ||
238 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
239 | &y, | |
240 | 35 * sizeof(u64), | |
241 | 36 * sizeof(u64)); | |
242 | } | |
243 | ||
d786a4a6 | 244 | if (!ret) { |
d09c2a23 DM |
245 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, |
246 | 36 * sizeof(u64), -1); | |
247 | ||
d786a4a6 | 248 | } |
d09c2a23 DM |
249 | return ret; |
250 | } | |
251 | ||
252 | static int genregs64_set(struct task_struct *target, | |
253 | const struct user_regset *regset, | |
254 | unsigned int pos, unsigned int count, | |
255 | const void *kbuf, const void __user *ubuf) | |
256 | { | |
257 | struct pt_regs *regs = task_pt_regs(target); | |
258 | int ret; | |
259 | ||
260 | if (target == current) | |
261 | flushw_user(); | |
262 | ||
263 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
264 | regs->u_regs, | |
265 | 0, 16 * sizeof(u64)); | |
d786a4a6 DM |
266 | if (!ret && count && pos < (32 * sizeof(u64))) { |
267 | struct reg_window window; | |
d09c2a23 | 268 | |
d786a4a6 DM |
269 | if (regwindow64_get(target, regs, &window)) |
270 | return -EFAULT; | |
d09c2a23 DM |
271 | |
272 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
d786a4a6 | 273 | &window, |
d09c2a23 DM |
274 | 16 * sizeof(u64), |
275 | 32 * sizeof(u64)); | |
d786a4a6 DM |
276 | |
277 | if (!ret && | |
278 | regwindow64_set(target, regs, &window)) | |
279 | return -EFAULT; | |
d09c2a23 DM |
280 | } |
281 | ||
282 | if (!ret && count > 0) { | |
283 | unsigned long tstate; | |
284 | ||
285 | /* TSTATE */ | |
286 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
287 | &tstate, | |
288 | 32 * sizeof(u64), | |
289 | 33 * sizeof(u64)); | |
290 | if (!ret) { | |
28e61036 DM |
291 | /* Only the condition codes and the "in syscall" |
292 | * state can be modified in the %tstate register. | |
d09c2a23 | 293 | */ |
28e61036 DM |
294 | tstate &= (TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL); |
295 | regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL); | |
d09c2a23 DM |
296 | regs->tstate |= tstate; |
297 | } | |
298 | } | |
299 | ||
300 | if (!ret) { | |
301 | /* TPC, TNPC */ | |
302 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
303 | ®s->tpc, | |
304 | 33 * sizeof(u64), | |
305 | 35 * sizeof(u64)); | |
306 | } | |
307 | ||
308 | if (!ret) { | |
309 | unsigned long y; | |
310 | ||
311 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
312 | &y, | |
313 | 35 * sizeof(u64), | |
314 | 36 * sizeof(u64)); | |
315 | if (!ret) | |
316 | regs->y = y; | |
317 | } | |
318 | ||
319 | if (!ret) | |
320 | ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
321 | 36 * sizeof(u64), -1); | |
322 | ||
323 | return ret; | |
324 | } | |
325 | ||
326 | static int fpregs64_get(struct task_struct *target, | |
327 | const struct user_regset *regset, | |
328 | unsigned int pos, unsigned int count, | |
329 | void *kbuf, void __user *ubuf) | |
330 | { | |
331 | const unsigned long *fpregs = task_thread_info(target)->fpregs; | |
332 | unsigned long fprs, fsr, gsr; | |
333 | int ret; | |
334 | ||
335 | if (target == current) | |
336 | save_and_clear_fpu(); | |
337 | ||
338 | fprs = task_thread_info(target)->fpsaved[0]; | |
339 | ||
340 | if (fprs & FPRS_DL) | |
341 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
342 | fpregs, | |
343 | 0, 16 * sizeof(u64)); | |
344 | else | |
345 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
346 | 0, | |
347 | 16 * sizeof(u64)); | |
348 | ||
349 | if (!ret) { | |
350 | if (fprs & FPRS_DU) | |
351 | ret = user_regset_copyout(&pos, &count, | |
352 | &kbuf, &ubuf, | |
353 | fpregs + 16, | |
354 | 16 * sizeof(u64), | |
355 | 32 * sizeof(u64)); | |
356 | else | |
357 | ret = user_regset_copyout_zero(&pos, &count, | |
358 | &kbuf, &ubuf, | |
359 | 16 * sizeof(u64), | |
360 | 32 * sizeof(u64)); | |
361 | } | |
362 | ||
363 | if (fprs & FPRS_FEF) { | |
364 | fsr = task_thread_info(target)->xfsr[0]; | |
365 | gsr = task_thread_info(target)->gsr[0]; | |
366 | } else { | |
367 | fsr = gsr = 0; | |
368 | } | |
369 | ||
370 | if (!ret) | |
371 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
372 | &fsr, | |
373 | 32 * sizeof(u64), | |
374 | 33 * sizeof(u64)); | |
375 | if (!ret) | |
376 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
377 | &gsr, | |
378 | 33 * sizeof(u64), | |
379 | 34 * sizeof(u64)); | |
380 | if (!ret) | |
381 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
382 | &fprs, | |
383 | 34 * sizeof(u64), | |
384 | 35 * sizeof(u64)); | |
385 | ||
386 | if (!ret) | |
387 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
388 | 35 * sizeof(u64), -1); | |
389 | ||
390 | return ret; | |
391 | } | |
392 | ||
393 | static int fpregs64_set(struct task_struct *target, | |
394 | const struct user_regset *regset, | |
395 | unsigned int pos, unsigned int count, | |
396 | const void *kbuf, const void __user *ubuf) | |
397 | { | |
398 | unsigned long *fpregs = task_thread_info(target)->fpregs; | |
399 | unsigned long fprs; | |
400 | int ret; | |
401 | ||
402 | if (target == current) | |
403 | save_and_clear_fpu(); | |
404 | ||
405 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
406 | fpregs, | |
407 | 0, 32 * sizeof(u64)); | |
408 | if (!ret) | |
409 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
410 | task_thread_info(target)->xfsr, | |
411 | 32 * sizeof(u64), | |
412 | 33 * sizeof(u64)); | |
413 | if (!ret) | |
414 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
415 | task_thread_info(target)->gsr, | |
416 | 33 * sizeof(u64), | |
417 | 34 * sizeof(u64)); | |
418 | ||
419 | fprs = task_thread_info(target)->fpsaved[0]; | |
420 | if (!ret && count > 0) { | |
421 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
422 | &fprs, | |
423 | 34 * sizeof(u64), | |
424 | 35 * sizeof(u64)); | |
425 | } | |
426 | ||
427 | fprs |= (FPRS_FEF | FPRS_DL | FPRS_DU); | |
428 | task_thread_info(target)->fpsaved[0] = fprs; | |
429 | ||
430 | if (!ret) | |
431 | ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
432 | 35 * sizeof(u64), -1); | |
433 | return ret; | |
434 | } | |
435 | ||
436 | static const struct user_regset sparc64_regsets[] = { | |
437 | /* Format is: | |
438 | * G0 --> G7 | |
439 | * O0 --> O7 | |
440 | * L0 --> L7 | |
441 | * I0 --> I7 | |
442 | * TSTATE, TPC, TNPC, Y | |
443 | */ | |
444 | [REGSET_GENERAL] = { | |
445 | .core_note_type = NT_PRSTATUS, | |
3c503701 | 446 | .n = 36, |
d09c2a23 DM |
447 | .size = sizeof(u64), .align = sizeof(u64), |
448 | .get = genregs64_get, .set = genregs64_set | |
449 | }, | |
450 | /* Format is: | |
451 | * F0 --> F63 | |
452 | * FSR | |
453 | * GSR | |
454 | * FPRS | |
455 | */ | |
456 | [REGSET_FP] = { | |
457 | .core_note_type = NT_PRFPREG, | |
3c503701 | 458 | .n = 35, |
d09c2a23 DM |
459 | .size = sizeof(u64), .align = sizeof(u64), |
460 | .get = fpregs64_get, .set = fpregs64_set | |
461 | }, | |
462 | }; | |
463 | ||
464 | static const struct user_regset_view user_sparc64_view = { | |
465 | .name = "sparc64", .e_machine = EM_SPARCV9, | |
466 | .regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets) | |
467 | }; | |
468 | ||
11cc8a3a | 469 | #ifdef CONFIG_COMPAT |
d09c2a23 DM |
470 | static int genregs32_get(struct task_struct *target, |
471 | const struct user_regset *regset, | |
472 | unsigned int pos, unsigned int count, | |
473 | void *kbuf, void __user *ubuf) | |
474 | { | |
475 | const struct pt_regs *regs = task_pt_regs(target); | |
476 | compat_ulong_t __user *reg_window; | |
477 | compat_ulong_t *k = kbuf; | |
478 | compat_ulong_t __user *u = ubuf; | |
479 | compat_ulong_t reg; | |
480 | ||
481 | if (target == current) | |
482 | flushw_user(); | |
483 | ||
484 | pos /= sizeof(reg); | |
485 | count /= sizeof(reg); | |
486 | ||
487 | if (kbuf) { | |
488 | for (; count > 0 && pos < 16; count--) | |
489 | *k++ = regs->u_regs[pos++]; | |
490 | ||
491 | reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; | |
ad4f9576 DM |
492 | if (target == current) { |
493 | for (; count > 0 && pos < 32; count--) { | |
494 | if (get_user(*k++, ®_window[pos++])) | |
495 | return -EFAULT; | |
496 | } | |
497 | } else { | |
498 | for (; count > 0 && pos < 32; count--) { | |
499 | if (access_process_vm(target, | |
500 | (unsigned long) | |
501 | ®_window[pos], | |
502 | k, sizeof(*k), 0) | |
503 | != sizeof(*k)) | |
504 | return -EFAULT; | |
505 | k++; | |
506 | pos++; | |
507 | } | |
d09c2a23 DM |
508 | } |
509 | } else { | |
510 | for (; count > 0 && pos < 16; count--) { | |
511 | if (put_user((compat_ulong_t) regs->u_regs[pos++], u++)) | |
512 | return -EFAULT; | |
513 | } | |
514 | ||
515 | reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; | |
ad4f9576 DM |
516 | if (target == current) { |
517 | for (; count > 0 && pos < 32; count--) { | |
518 | if (get_user(reg, ®_window[pos++]) || | |
519 | put_user(reg, u++)) | |
520 | return -EFAULT; | |
521 | } | |
522 | } else { | |
523 | for (; count > 0 && pos < 32; count--) { | |
524 | if (access_process_vm(target, | |
525 | (unsigned long) | |
526 | ®_window[pos], | |
527 | ®, sizeof(reg), 0) | |
528 | != sizeof(reg)) | |
529 | return -EFAULT; | |
530 | if (access_process_vm(target, | |
531 | (unsigned long) u, | |
532 | ®, sizeof(reg), 1) | |
533 | != sizeof(reg)) | |
534 | return -EFAULT; | |
535 | pos++; | |
536 | u++; | |
537 | } | |
d09c2a23 DM |
538 | } |
539 | } | |
540 | while (count > 0) { | |
541 | switch (pos) { | |
542 | case 32: /* PSR */ | |
543 | reg = tstate_to_psr(regs->tstate); | |
544 | break; | |
545 | case 33: /* PC */ | |
546 | reg = regs->tpc; | |
547 | break; | |
548 | case 34: /* NPC */ | |
549 | reg = regs->tnpc; | |
550 | break; | |
551 | case 35: /* Y */ | |
552 | reg = regs->y; | |
553 | break; | |
554 | case 36: /* WIM */ | |
555 | case 37: /* TBR */ | |
556 | reg = 0; | |
557 | break; | |
558 | default: | |
559 | goto finish; | |
560 | } | |
561 | ||
562 | if (kbuf) | |
563 | *k++ = reg; | |
564 | else if (put_user(reg, u++)) | |
565 | return -EFAULT; | |
566 | pos++; | |
567 | count--; | |
568 | } | |
569 | finish: | |
570 | pos *= sizeof(reg); | |
571 | count *= sizeof(reg); | |
572 | ||
573 | return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
574 | 38 * sizeof(reg), -1); | |
575 | } | |
576 | ||
577 | static int genregs32_set(struct task_struct *target, | |
578 | const struct user_regset *regset, | |
579 | unsigned int pos, unsigned int count, | |
580 | const void *kbuf, const void __user *ubuf) | |
581 | { | |
582 | struct pt_regs *regs = task_pt_regs(target); | |
583 | compat_ulong_t __user *reg_window; | |
584 | const compat_ulong_t *k = kbuf; | |
585 | const compat_ulong_t __user *u = ubuf; | |
586 | compat_ulong_t reg; | |
587 | ||
588 | if (target == current) | |
589 | flushw_user(); | |
590 | ||
591 | pos /= sizeof(reg); | |
592 | count /= sizeof(reg); | |
593 | ||
594 | if (kbuf) { | |
595 | for (; count > 0 && pos < 16; count--) | |
596 | regs->u_regs[pos++] = *k++; | |
597 | ||
598 | reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; | |
ad4f9576 DM |
599 | if (target == current) { |
600 | for (; count > 0 && pos < 32; count--) { | |
601 | if (put_user(*k++, ®_window[pos++])) | |
602 | return -EFAULT; | |
603 | } | |
604 | } else { | |
605 | for (; count > 0 && pos < 32; count--) { | |
606 | if (access_process_vm(target, | |
607 | (unsigned long) | |
608 | ®_window[pos], | |
609 | (void *) k, | |
610 | sizeof(*k), 1) | |
611 | != sizeof(*k)) | |
612 | return -EFAULT; | |
613 | k++; | |
614 | pos++; | |
615 | } | |
d09c2a23 DM |
616 | } |
617 | } else { | |
618 | for (; count > 0 && pos < 16; count--) { | |
619 | if (get_user(reg, u++)) | |
620 | return -EFAULT; | |
621 | regs->u_regs[pos++] = reg; | |
622 | } | |
623 | ||
624 | reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; | |
ad4f9576 DM |
625 | if (target == current) { |
626 | for (; count > 0 && pos < 32; count--) { | |
627 | if (get_user(reg, u++) || | |
628 | put_user(reg, ®_window[pos++])) | |
629 | return -EFAULT; | |
630 | } | |
631 | } else { | |
632 | for (; count > 0 && pos < 32; count--) { | |
633 | if (access_process_vm(target, | |
634 | (unsigned long) | |
635 | u, | |
636 | ®, sizeof(reg), 0) | |
637 | != sizeof(reg)) | |
638 | return -EFAULT; | |
639 | if (access_process_vm(target, | |
640 | (unsigned long) | |
641 | ®_window[pos], | |
642 | ®, sizeof(reg), 1) | |
643 | != sizeof(reg)) | |
644 | return -EFAULT; | |
645 | pos++; | |
646 | u++; | |
647 | } | |
d09c2a23 DM |
648 | } |
649 | } | |
650 | while (count > 0) { | |
651 | unsigned long tstate; | |
652 | ||
653 | if (kbuf) | |
654 | reg = *k++; | |
655 | else if (get_user(reg, u++)) | |
656 | return -EFAULT; | |
657 | ||
658 | switch (pos) { | |
659 | case 32: /* PSR */ | |
660 | tstate = regs->tstate; | |
28e61036 | 661 | tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL); |
d09c2a23 | 662 | tstate |= psr_to_tstate_icc(reg); |
28e61036 DM |
663 | if (reg & PSR_SYSCALL) |
664 | tstate |= TSTATE_SYSCALL; | |
d09c2a23 DM |
665 | regs->tstate = tstate; |
666 | break; | |
667 | case 33: /* PC */ | |
668 | regs->tpc = reg; | |
669 | break; | |
670 | case 34: /* NPC */ | |
671 | regs->tnpc = reg; | |
672 | break; | |
673 | case 35: /* Y */ | |
674 | regs->y = reg; | |
675 | break; | |
676 | case 36: /* WIM */ | |
677 | case 37: /* TBR */ | |
678 | break; | |
679 | default: | |
680 | goto finish; | |
681 | } | |
682 | ||
683 | pos++; | |
684 | count--; | |
685 | } | |
686 | finish: | |
687 | pos *= sizeof(reg); | |
688 | count *= sizeof(reg); | |
689 | ||
690 | return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
691 | 38 * sizeof(reg), -1); | |
692 | } | |
693 | ||
694 | static int fpregs32_get(struct task_struct *target, | |
695 | const struct user_regset *regset, | |
696 | unsigned int pos, unsigned int count, | |
697 | void *kbuf, void __user *ubuf) | |
698 | { | |
699 | const unsigned long *fpregs = task_thread_info(target)->fpregs; | |
700 | compat_ulong_t enabled; | |
701 | unsigned long fprs; | |
702 | compat_ulong_t fsr; | |
703 | int ret = 0; | |
704 | ||
705 | if (target == current) | |
706 | save_and_clear_fpu(); | |
707 | ||
708 | fprs = task_thread_info(target)->fpsaved[0]; | |
709 | if (fprs & FPRS_FEF) { | |
710 | fsr = task_thread_info(target)->xfsr[0]; | |
711 | enabled = 1; | |
712 | } else { | |
713 | fsr = 0; | |
714 | enabled = 0; | |
715 | } | |
716 | ||
717 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
718 | fpregs, | |
719 | 0, 32 * sizeof(u32)); | |
720 | ||
721 | if (!ret) | |
722 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
723 | 32 * sizeof(u32), | |
724 | 33 * sizeof(u32)); | |
725 | if (!ret) | |
726 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
727 | &fsr, | |
728 | 33 * sizeof(u32), | |
729 | 34 * sizeof(u32)); | |
730 | ||
731 | if (!ret) { | |
732 | compat_ulong_t val; | |
733 | ||
734 | val = (enabled << 8) | (8 << 16); | |
735 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
736 | &val, | |
737 | 34 * sizeof(u32), | |
738 | 35 * sizeof(u32)); | |
739 | } | |
740 | ||
741 | if (!ret) | |
742 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
743 | 35 * sizeof(u32), -1); | |
744 | ||
745 | return ret; | |
746 | } | |
747 | ||
748 | static int fpregs32_set(struct task_struct *target, | |
749 | const struct user_regset *regset, | |
750 | unsigned int pos, unsigned int count, | |
751 | const void *kbuf, const void __user *ubuf) | |
752 | { | |
753 | unsigned long *fpregs = task_thread_info(target)->fpregs; | |
754 | unsigned long fprs; | |
755 | int ret; | |
756 | ||
757 | if (target == current) | |
758 | save_and_clear_fpu(); | |
759 | ||
760 | fprs = task_thread_info(target)->fpsaved[0]; | |
761 | ||
762 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
763 | fpregs, | |
764 | 0, 32 * sizeof(u32)); | |
765 | if (!ret) | |
766 | user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
767 | 32 * sizeof(u32), | |
768 | 33 * sizeof(u32)); | |
769 | if (!ret && count > 0) { | |
770 | compat_ulong_t fsr; | |
771 | unsigned long val; | |
772 | ||
773 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
774 | &fsr, | |
775 | 33 * sizeof(u32), | |
776 | 34 * sizeof(u32)); | |
777 | if (!ret) { | |
778 | val = task_thread_info(target)->xfsr[0]; | |
779 | val &= 0xffffffff00000000UL; | |
780 | val |= fsr; | |
781 | task_thread_info(target)->xfsr[0] = val; | |
782 | } | |
783 | } | |
784 | ||
785 | fprs |= (FPRS_FEF | FPRS_DL); | |
786 | task_thread_info(target)->fpsaved[0] = fprs; | |
787 | ||
788 | if (!ret) | |
789 | ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
790 | 34 * sizeof(u32), -1); | |
791 | return ret; | |
792 | } | |
793 | ||
794 | static const struct user_regset sparc32_regsets[] = { | |
795 | /* Format is: | |
796 | * G0 --> G7 | |
797 | * O0 --> O7 | |
798 | * L0 --> L7 | |
799 | * I0 --> I7 | |
800 | * PSR, PC, nPC, Y, WIM, TBR | |
801 | */ | |
802 | [REGSET_GENERAL] = { | |
803 | .core_note_type = NT_PRSTATUS, | |
3c503701 | 804 | .n = 38, |
d09c2a23 DM |
805 | .size = sizeof(u32), .align = sizeof(u32), |
806 | .get = genregs32_get, .set = genregs32_set | |
807 | }, | |
808 | /* Format is: | |
809 | * F0 --> F31 | |
810 | * empty 32-bit word | |
811 | * FSR (32--bit word) | |
812 | * FPU QUEUE COUNT (8-bit char) | |
813 | * FPU QUEUE ENTRYSIZE (8-bit char) | |
814 | * FPU ENABLED (8-bit char) | |
815 | * empty 8-bit char | |
816 | * FPU QUEUE (64 32-bit ints) | |
817 | */ | |
818 | [REGSET_FP] = { | |
819 | .core_note_type = NT_PRFPREG, | |
3c503701 | 820 | .n = 99, |
d09c2a23 DM |
821 | .size = sizeof(u32), .align = sizeof(u32), |
822 | .get = fpregs32_get, .set = fpregs32_set | |
823 | }, | |
824 | }; | |
825 | ||
826 | static const struct user_regset_view user_sparc32_view = { | |
827 | .name = "sparc", .e_machine = EM_SPARC, | |
828 | .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets) | |
829 | }; | |
11cc8a3a | 830 | #endif /* CONFIG_COMPAT */ |
d09c2a23 DM |
831 | |
832 | const struct user_regset_view *task_user_regset_view(struct task_struct *task) | |
833 | { | |
11cc8a3a | 834 | #ifdef CONFIG_COMPAT |
d09c2a23 DM |
835 | if (test_tsk_thread_flag(task, TIF_32BIT)) |
836 | return &user_sparc32_view; | |
11cc8a3a | 837 | #endif |
d09c2a23 DM |
838 | return &user_sparc64_view; |
839 | } | |
840 | ||
11cc8a3a | 841 | #ifdef CONFIG_COMPAT |
2ba85f3a DM |
842 | struct compat_fps { |
843 | unsigned int regs[32]; | |
844 | unsigned int fsr; | |
845 | unsigned int flags; | |
846 | unsigned int extra; | |
847 | unsigned int fpqd; | |
848 | struct compat_fq { | |
849 | unsigned int insnaddr; | |
850 | unsigned int insn; | |
851 | } fpq[16]; | |
852 | }; | |
853 | ||
854 | long compat_arch_ptrace(struct task_struct *child, compat_long_t request, | |
855 | compat_ulong_t caddr, compat_ulong_t cdata) | |
1da177e4 | 856 | { |
d786a4a6 | 857 | const struct user_regset_view *view = task_user_regset_view(current); |
2ba85f3a DM |
858 | compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4]; |
859 | struct pt_regs32 __user *pregs; | |
860 | struct compat_fps __user *fps; | |
861 | unsigned long addr2 = caddr2; | |
862 | unsigned long addr = caddr; | |
863 | unsigned long data = cdata; | |
9473272a | 864 | int ret; |
1da177e4 | 865 | |
2ba85f3a DM |
866 | pregs = (struct pt_regs32 __user *) addr; |
867 | fps = (struct compat_fps __user *) addr; | |
1da177e4 | 868 | |
2ba85f3a | 869 | switch (request) { |
1759e58e | 870 | case PTRACE_PEEKUSR: |
9775369e DM |
871 | ret = (addr != 0) ? -EIO : 0; |
872 | break; | |
1759e58e | 873 | |
2ba85f3a | 874 | case PTRACE_GETREGS: |
9473272a DM |
875 | ret = copy_regset_to_user(child, view, REGSET_GENERAL, |
876 | 32 * sizeof(u32), | |
877 | 4 * sizeof(u32), | |
878 | &pregs->psr); | |
879 | if (!ret) | |
880 | ret = copy_regset_to_user(child, view, REGSET_GENERAL, | |
881 | 1 * sizeof(u32), | |
882 | 15 * sizeof(u32), | |
883 | &pregs->u_regs[0]); | |
9775369e | 884 | break; |
9473272a | 885 | |
2ba85f3a | 886 | case PTRACE_SETREGS: |
9473272a DM |
887 | ret = copy_regset_from_user(child, view, REGSET_GENERAL, |
888 | 32 * sizeof(u32), | |
889 | 4 * sizeof(u32), | |
890 | &pregs->psr); | |
891 | if (!ret) | |
892 | ret = copy_regset_from_user(child, view, REGSET_GENERAL, | |
893 | 1 * sizeof(u32), | |
894 | 15 * sizeof(u32), | |
895 | &pregs->u_regs[0]); | |
9775369e | 896 | break; |
9775369e | 897 | |
2ba85f3a | 898 | case PTRACE_GETFPREGS: |
9473272a DM |
899 | ret = copy_regset_to_user(child, view, REGSET_FP, |
900 | 0 * sizeof(u32), | |
901 | 32 * sizeof(u32), | |
902 | &fps->regs[0]); | |
903 | if (!ret) | |
904 | ret = copy_regset_to_user(child, view, REGSET_FP, | |
905 | 33 * sizeof(u32), | |
906 | 1 * sizeof(u32), | |
907 | &fps->fsr); | |
908 | if (!ret) { | |
909 | if (__put_user(0, &fps->flags) || | |
910 | __put_user(0, &fps->extra) || | |
911 | __put_user(0, &fps->fpqd) || | |
912 | clear_user(&fps->fpq[0], 32 * sizeof(unsigned int))) | |
913 | ret = -EFAULT; | |
914 | } | |
9775369e | 915 | break; |
9775369e | 916 | |
2ba85f3a | 917 | case PTRACE_SETFPREGS: |
9473272a DM |
918 | ret = copy_regset_from_user(child, view, REGSET_FP, |
919 | 0 * sizeof(u32), | |
920 | 32 * sizeof(u32), | |
921 | &fps->regs[0]); | |
922 | if (!ret) | |
923 | ret = copy_regset_from_user(child, view, REGSET_FP, | |
924 | 33 * sizeof(u32), | |
925 | 1 * sizeof(u32), | |
926 | &fps->fsr); | |
9775369e | 927 | break; |
2ba85f3a DM |
928 | |
929 | case PTRACE_READTEXT: | |
930 | case PTRACE_READDATA: | |
931 | ret = ptrace_readdata(child, addr, | |
932 | (char __user *)addr2, data); | |
933 | if (ret == data) | |
934 | ret = 0; | |
935 | else if (ret >= 0) | |
936 | ret = -EIO; | |
937 | break; | |
938 | ||
939 | case PTRACE_WRITETEXT: | |
940 | case PTRACE_WRITEDATA: | |
941 | ret = ptrace_writedata(child, (char __user *) addr2, | |
942 | addr, data); | |
943 | if (ret == data) | |
944 | ret = 0; | |
945 | else if (ret >= 0) | |
946 | ret = -EIO; | |
947 | break; | |
948 | ||
949 | default: | |
986bef85 DM |
950 | if (request == PTRACE_SPARC_DETACH) |
951 | request = PTRACE_DETACH; | |
2ba85f3a DM |
952 | ret = compat_ptrace_request(child, request, addr, data); |
953 | break; | |
1da177e4 LT |
954 | } |
955 | ||
2ba85f3a DM |
956 | return ret; |
957 | } | |
11cc8a3a | 958 | #endif /* CONFIG_COMPAT */ |
2ba85f3a DM |
959 | |
960 | struct fps { | |
961 | unsigned int regs[64]; | |
962 | unsigned long fsr; | |
963 | }; | |
964 | ||
965 | long arch_ptrace(struct task_struct *child, long request, long addr, long data) | |
966 | { | |
d786a4a6 | 967 | const struct user_regset_view *view = task_user_regset_view(current); |
2ba85f3a | 968 | unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4]; |
bfdf9ebc DM |
969 | struct pt_regs __user *pregs; |
970 | struct fps __user *fps; | |
2ba85f3a DM |
971 | int ret; |
972 | ||
bfdf9ebc DM |
973 | pregs = (struct pt_regs __user *) (unsigned long) addr; |
974 | fps = (struct fps __user *) (unsigned long) addr; | |
975 | ||
2ba85f3a DM |
976 | switch (request) { |
977 | case PTRACE_PEEKUSR: | |
978 | ret = (addr != 0) ? -EIO : 0; | |
979 | break; | |
9775369e | 980 | |
2ba85f3a DM |
981 | case PTRACE_GETREGS64: |
982 | ret = copy_regset_to_user(child, view, REGSET_GENERAL, | |
983 | 1 * sizeof(u64), | |
984 | 15 * sizeof(u64), | |
985 | &pregs->u_regs[0]); | |
986 | if (!ret) { | |
987 | /* XXX doesn't handle 'y' register correctly XXX */ | |
988 | ret = copy_regset_to_user(child, view, REGSET_GENERAL, | |
989 | 32 * sizeof(u64), | |
990 | 4 * sizeof(u64), | |
991 | &pregs->tstate); | |
992 | } | |
993 | break; | |
994 | ||
995 | case PTRACE_SETREGS64: | |
996 | ret = copy_regset_from_user(child, view, REGSET_GENERAL, | |
997 | 1 * sizeof(u64), | |
998 | 15 * sizeof(u64), | |
999 | &pregs->u_regs[0]); | |
1000 | if (!ret) { | |
1001 | /* XXX doesn't handle 'y' register correctly XXX */ | |
1002 | ret = copy_regset_from_user(child, view, REGSET_GENERAL, | |
1003 | 32 * sizeof(u64), | |
1004 | 4 * sizeof(u64), | |
1005 | &pregs->tstate); | |
1006 | } | |
1007 | break; | |
1008 | ||
1009 | case PTRACE_GETFPREGS64: | |
1010 | ret = copy_regset_to_user(child, view, REGSET_FP, | |
1011 | 0 * sizeof(u64), | |
1012 | 33 * sizeof(u64), | |
1013 | fps); | |
1014 | break; | |
1015 | ||
1016 | case PTRACE_SETFPREGS64: | |
ee4ee527 | 1017 | ret = copy_regset_from_user(child, view, REGSET_FP, |
9473272a DM |
1018 | 0 * sizeof(u64), |
1019 | 33 * sizeof(u64), | |
1020 | fps); | |
9775369e | 1021 | break; |
1da177e4 LT |
1022 | |
1023 | case PTRACE_READTEXT: | |
9775369e DM |
1024 | case PTRACE_READDATA: |
1025 | ret = ptrace_readdata(child, addr, | |
1026 | (char __user *)addr2, data); | |
1027 | if (ret == data) | |
1028 | ret = 0; | |
1029 | else if (ret >= 0) | |
1030 | ret = -EIO; | |
1031 | break; | |
1da177e4 LT |
1032 | |
1033 | case PTRACE_WRITETEXT: | |
9775369e DM |
1034 | case PTRACE_WRITEDATA: |
1035 | ret = ptrace_writedata(child, (char __user *) addr2, | |
1036 | addr, data); | |
1037 | if (ret == data) | |
1038 | ret = 0; | |
1039 | else if (ret >= 0) | |
1040 | ret = -EIO; | |
1041 | break; | |
1da177e4 | 1042 | |
9775369e | 1043 | default: |
986bef85 DM |
1044 | if (request == PTRACE_SPARC_DETACH) |
1045 | request = PTRACE_DETACH; | |
9775369e DM |
1046 | ret = ptrace_request(child, request, addr, data); |
1047 | break; | |
1da177e4 | 1048 | } |
9775369e DM |
1049 | |
1050 | return ret; | |
1da177e4 LT |
1051 | } |
1052 | ||
fe06ccaa | 1053 | asmlinkage int syscall_trace_enter(struct pt_regs *regs) |
1da177e4 | 1054 | { |
73ccefab RM |
1055 | int ret = 0; |
1056 | ||
bb49bcda | 1057 | /* do the secure computing check first */ |
8d8a6479 | 1058 | secure_computing(regs->u_regs[UREG_G1]); |
bb49bcda | 1059 | |
fe06ccaa DM |
1060 | if (test_thread_flag(TIF_SYSCALL_TRACE)) |
1061 | ret = tracehook_report_syscall_entry(regs); | |
f7ceba36 | 1062 | |
fe06ccaa | 1063 | if (unlikely(current->audit_context) && !ret) |
5411be59 | 1064 | audit_syscall_entry((test_thread_flag(TIF_32BIT) ? |
f7ceba36 DM |
1065 | AUDIT_ARCH_SPARC : |
1066 | AUDIT_ARCH_SPARC64), | |
1067 | regs->u_regs[UREG_G1], | |
1068 | regs->u_regs[UREG_I0], | |
1069 | regs->u_regs[UREG_I1], | |
1070 | regs->u_regs[UREG_I2], | |
1071 | regs->u_regs[UREG_I3]); | |
73ccefab RM |
1072 | |
1073 | return ret; | |
1da177e4 | 1074 | } |
fe06ccaa DM |
1075 | |
1076 | asmlinkage void syscall_trace_leave(struct pt_regs *regs) | |
1077 | { | |
1078 | if (unlikely(current->audit_context)) { | |
1079 | unsigned long tstate = regs->tstate; | |
1080 | int result = AUDITSC_SUCCESS; | |
1081 | ||
1082 | if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) | |
1083 | result = AUDITSC_FAILURE; | |
1084 | ||
1085 | audit_syscall_exit(result, regs->u_regs[UREG_I0]); | |
1086 | } | |
1087 | ||
1088 | if (test_thread_flag(TIF_SYSCALL_TRACE)) | |
1089 | tracehook_report_syscall_exit(regs, 0); | |
1090 | } |