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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> | |
68db0cf1 | 15 | #include <linux/sched/task_stack.h> |
1da177e4 LT |
16 | #include <linux/mm.h> |
17 | #include <linux/errno.h> | |
dc76f9ca | 18 | #include <linux/export.h> |
1da177e4 LT |
19 | #include <linux/ptrace.h> |
20 | #include <linux/user.h> | |
21 | #include <linux/smp.h> | |
1da177e4 | 22 | #include <linux/security.h> |
f7ceba36 DM |
23 | #include <linux/seccomp.h> |
24 | #include <linux/audit.h> | |
7ed20e1a | 25 | #include <linux/signal.h> |
d09c2a23 | 26 | #include <linux/regset.h> |
73ccefab | 27 | #include <linux/tracehook.h> |
c658ad1b | 28 | #include <trace/syscall.h> |
d09c2a23 DM |
29 | #include <linux/compat.h> |
30 | #include <linux/elf.h> | |
812cb83a | 31 | #include <linux/context_tracking.h> |
1da177e4 LT |
32 | |
33 | #include <asm/asi.h> | |
34 | #include <asm/pgtable.h> | |
7c0f6ba6 | 35 | #include <linux/uaccess.h> |
1da177e4 LT |
36 | #include <asm/psrcompat.h> |
37 | #include <asm/visasm.h> | |
38 | #include <asm/spitfire.h> | |
6a9b490d | 39 | #include <asm/page.h> |
717463d8 | 40 | #include <asm/cpudata.h> |
bfdf9ebc DM |
41 | #include <asm/cacheflush.h> |
42 | ||
c658ad1b DM |
43 | #define CREATE_TRACE_POINTS |
44 | #include <trace/events/syscalls.h> | |
45 | ||
bfdf9ebc | 46 | #include "entry.h" |
1da177e4 | 47 | |
1da177e4 | 48 | /* #define ALLOW_INIT_TRACING */ |
1da177e4 | 49 | |
e8f4aa60 AP |
50 | struct pt_regs_offset { |
51 | const char *name; | |
52 | int offset; | |
53 | }; | |
54 | ||
55 | #define REG_OFFSET_NAME(n, r) \ | |
56 | {.name = n, .offset = (PT_V9_##r)} | |
57 | #define REG_OFFSET_END {.name = NULL, .offset = 0} | |
58 | ||
59 | static const struct pt_regs_offset regoffset_table[] = { | |
60 | REG_OFFSET_NAME("g0", G0), | |
61 | REG_OFFSET_NAME("g1", G1), | |
62 | REG_OFFSET_NAME("g2", G2), | |
63 | REG_OFFSET_NAME("g3", G3), | |
64 | REG_OFFSET_NAME("g4", G4), | |
65 | REG_OFFSET_NAME("g5", G5), | |
66 | REG_OFFSET_NAME("g6", G6), | |
67 | REG_OFFSET_NAME("g7", G7), | |
68 | ||
69 | REG_OFFSET_NAME("i0", I0), | |
70 | REG_OFFSET_NAME("i1", I1), | |
71 | REG_OFFSET_NAME("i2", I2), | |
72 | REG_OFFSET_NAME("i3", I3), | |
73 | REG_OFFSET_NAME("i4", I4), | |
74 | REG_OFFSET_NAME("i5", I5), | |
75 | REG_OFFSET_NAME("i6", I6), | |
76 | REG_OFFSET_NAME("i7", I7), | |
77 | ||
78 | REG_OFFSET_NAME("tstate", TSTATE), | |
79 | REG_OFFSET_NAME("pc", TPC), | |
80 | REG_OFFSET_NAME("npc", TNPC), | |
81 | REG_OFFSET_NAME("y", Y), | |
82 | REG_OFFSET_NAME("lr", I7), | |
83 | ||
84 | REG_OFFSET_END, | |
85 | }; | |
86 | ||
1da177e4 LT |
87 | /* |
88 | * Called by kernel/ptrace.c when detaching.. | |
89 | * | |
90 | * Make sure single step bits etc are not set. | |
91 | */ | |
92 | void ptrace_disable(struct task_struct *child) | |
93 | { | |
94 | /* nothing to do */ | |
95 | } | |
96 | ||
dadeafdf DM |
97 | /* To get the necessary page struct, access_process_vm() first calls |
98 | * get_user_pages(). This has done a flush_dcache_page() on the | |
99 | * accessed page. Then our caller (copy_{to,from}_user_page()) did | |
100 | * to memcpy to read/write the data from that page. | |
101 | * | |
102 | * Now, the only thing we have to do is: | |
103 | * 1) flush the D-cache if it's possible than an illegal alias | |
104 | * has been created | |
105 | * 2) flush the I-cache if this is pre-cheetah and we did a write | |
106 | */ | |
107 | void flush_ptrace_access(struct vm_area_struct *vma, struct page *page, | |
108 | unsigned long uaddr, void *kaddr, | |
109 | unsigned long len, int write) | |
110 | { | |
111 | BUG_ON(len > PAGE_SIZE); | |
112 | ||
7adb37fe DM |
113 | if (tlb_type == hypervisor) |
114 | return; | |
115 | ||
f6a843d9 DM |
116 | preempt_disable(); |
117 | ||
dadeafdf DM |
118 | #ifdef DCACHE_ALIASING_POSSIBLE |
119 | /* If bit 13 of the kernel address we used to access the | |
120 | * user page is the same as the virtual address that page | |
121 | * is mapped to in the user's address space, we can skip the | |
122 | * D-cache flush. | |
123 | */ | |
6a9b490d | 124 | if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) { |
dadeafdf DM |
125 | unsigned long start = __pa(kaddr); |
126 | unsigned long end = start + len; | |
717463d8 DM |
127 | unsigned long dcache_line_size; |
128 | ||
129 | dcache_line_size = local_cpu_data().dcache_line_size; | |
dadeafdf DM |
130 | |
131 | if (tlb_type == spitfire) { | |
717463d8 | 132 | for (; start < end; start += dcache_line_size) |
6a9b490d | 133 | spitfire_put_dcache_tag(start & 0x3fe0, 0x0); |
dadeafdf | 134 | } else { |
717463d8 DM |
135 | start &= ~(dcache_line_size - 1); |
136 | for (; start < end; start += dcache_line_size) | |
dadeafdf DM |
137 | __asm__ __volatile__( |
138 | "stxa %%g0, [%0] %1\n\t" | |
139 | "membar #Sync" | |
140 | : /* no outputs */ | |
6a9b490d | 141 | : "r" (start), |
dadeafdf DM |
142 | "i" (ASI_DCACHE_INVALIDATE)); |
143 | } | |
144 | } | |
145 | #endif | |
146 | if (write && tlb_type == spitfire) { | |
147 | unsigned long start = (unsigned long) kaddr; | |
148 | unsigned long end = start + len; | |
717463d8 DM |
149 | unsigned long icache_line_size; |
150 | ||
151 | icache_line_size = local_cpu_data().icache_line_size; | |
dadeafdf | 152 | |
717463d8 | 153 | for (; start < end; start += icache_line_size) |
dadeafdf DM |
154 | flushi(start); |
155 | } | |
f6a843d9 DM |
156 | |
157 | preempt_enable(); | |
dadeafdf | 158 | } |
dc76f9ca | 159 | EXPORT_SYMBOL_GPL(flush_ptrace_access); |
dadeafdf | 160 | |
d786a4a6 DM |
161 | static int get_from_target(struct task_struct *target, unsigned long uaddr, |
162 | void *kbuf, int len) | |
163 | { | |
164 | if (target == current) { | |
165 | if (copy_from_user(kbuf, (void __user *) uaddr, len)) | |
166 | return -EFAULT; | |
167 | } else { | |
f307ab6d LS |
168 | int len2 = access_process_vm(target, uaddr, kbuf, len, |
169 | FOLL_FORCE); | |
d786a4a6 DM |
170 | if (len2 != len) |
171 | return -EFAULT; | |
172 | } | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static int set_to_target(struct task_struct *target, unsigned long uaddr, | |
177 | void *kbuf, int len) | |
178 | { | |
179 | if (target == current) { | |
180 | if (copy_to_user((void __user *) uaddr, kbuf, len)) | |
181 | return -EFAULT; | |
182 | } else { | |
f307ab6d LS |
183 | int len2 = access_process_vm(target, uaddr, kbuf, len, |
184 | FOLL_FORCE | FOLL_WRITE); | |
d786a4a6 DM |
185 | if (len2 != len) |
186 | return -EFAULT; | |
187 | } | |
188 | return 0; | |
189 | } | |
190 | ||
191 | static int regwindow64_get(struct task_struct *target, | |
192 | const struct pt_regs *regs, | |
193 | struct reg_window *wbuf) | |
194 | { | |
195 | unsigned long rw_addr = regs->u_regs[UREG_I6]; | |
196 | ||
517ffce4 | 197 | if (!test_thread_64bit_stack(rw_addr)) { |
d786a4a6 DM |
198 | struct reg_window32 win32; |
199 | int i; | |
200 | ||
201 | if (get_from_target(target, rw_addr, &win32, sizeof(win32))) | |
202 | return -EFAULT; | |
203 | for (i = 0; i < 8; i++) | |
204 | wbuf->locals[i] = win32.locals[i]; | |
205 | for (i = 0; i < 8; i++) | |
206 | wbuf->ins[i] = win32.ins[i]; | |
207 | } else { | |
208 | rw_addr += STACK_BIAS; | |
209 | if (get_from_target(target, rw_addr, wbuf, sizeof(*wbuf))) | |
210 | return -EFAULT; | |
211 | } | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | static int regwindow64_set(struct task_struct *target, | |
217 | const struct pt_regs *regs, | |
218 | struct reg_window *wbuf) | |
219 | { | |
220 | unsigned long rw_addr = regs->u_regs[UREG_I6]; | |
221 | ||
517ffce4 | 222 | if (!test_thread_64bit_stack(rw_addr)) { |
d786a4a6 DM |
223 | struct reg_window32 win32; |
224 | int i; | |
225 | ||
226 | for (i = 0; i < 8; i++) | |
227 | win32.locals[i] = wbuf->locals[i]; | |
228 | for (i = 0; i < 8; i++) | |
229 | win32.ins[i] = wbuf->ins[i]; | |
230 | ||
231 | if (set_to_target(target, rw_addr, &win32, sizeof(win32))) | |
232 | return -EFAULT; | |
233 | } else { | |
234 | rw_addr += STACK_BIAS; | |
235 | if (set_to_target(target, rw_addr, wbuf, sizeof(*wbuf))) | |
236 | return -EFAULT; | |
237 | } | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
d09c2a23 DM |
242 | enum sparc_regset { |
243 | REGSET_GENERAL, | |
244 | REGSET_FP, | |
245 | }; | |
246 | ||
247 | static int genregs64_get(struct task_struct *target, | |
248 | const struct user_regset *regset, | |
249 | unsigned int pos, unsigned int count, | |
250 | void *kbuf, void __user *ubuf) | |
251 | { | |
252 | const struct pt_regs *regs = task_pt_regs(target); | |
253 | int ret; | |
254 | ||
255 | if (target == current) | |
256 | flushw_user(); | |
257 | ||
258 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
259 | regs->u_regs, | |
260 | 0, 16 * sizeof(u64)); | |
d786a4a6 DM |
261 | if (!ret && count && pos < (32 * sizeof(u64))) { |
262 | struct reg_window window; | |
d09c2a23 | 263 | |
d786a4a6 DM |
264 | if (regwindow64_get(target, regs, &window)) |
265 | return -EFAULT; | |
d09c2a23 | 266 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, |
d786a4a6 | 267 | &window, |
d09c2a23 DM |
268 | 16 * sizeof(u64), |
269 | 32 * sizeof(u64)); | |
270 | } | |
271 | ||
272 | if (!ret) { | |
273 | /* TSTATE, TPC, TNPC */ | |
274 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
275 | ®s->tstate, | |
276 | 32 * sizeof(u64), | |
277 | 35 * sizeof(u64)); | |
278 | } | |
279 | ||
280 | if (!ret) { | |
281 | unsigned long y = regs->y; | |
282 | ||
283 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
284 | &y, | |
285 | 35 * sizeof(u64), | |
286 | 36 * sizeof(u64)); | |
287 | } | |
288 | ||
d786a4a6 | 289 | if (!ret) { |
d09c2a23 DM |
290 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, |
291 | 36 * sizeof(u64), -1); | |
292 | ||
d786a4a6 | 293 | } |
d09c2a23 DM |
294 | return ret; |
295 | } | |
296 | ||
297 | static int genregs64_set(struct task_struct *target, | |
298 | const struct user_regset *regset, | |
299 | unsigned int pos, unsigned int count, | |
300 | const void *kbuf, const void __user *ubuf) | |
301 | { | |
302 | struct pt_regs *regs = task_pt_regs(target); | |
303 | int ret; | |
304 | ||
305 | if (target == current) | |
306 | flushw_user(); | |
307 | ||
308 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
309 | regs->u_regs, | |
310 | 0, 16 * sizeof(u64)); | |
d786a4a6 DM |
311 | if (!ret && count && pos < (32 * sizeof(u64))) { |
312 | struct reg_window window; | |
d09c2a23 | 313 | |
d786a4a6 DM |
314 | if (regwindow64_get(target, regs, &window)) |
315 | return -EFAULT; | |
d09c2a23 DM |
316 | |
317 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
d786a4a6 | 318 | &window, |
d09c2a23 DM |
319 | 16 * sizeof(u64), |
320 | 32 * sizeof(u64)); | |
d786a4a6 DM |
321 | |
322 | if (!ret && | |
323 | regwindow64_set(target, regs, &window)) | |
324 | return -EFAULT; | |
d09c2a23 DM |
325 | } |
326 | ||
327 | if (!ret && count > 0) { | |
328 | unsigned long tstate; | |
329 | ||
330 | /* TSTATE */ | |
331 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
332 | &tstate, | |
333 | 32 * sizeof(u64), | |
334 | 33 * sizeof(u64)); | |
335 | if (!ret) { | |
28e61036 DM |
336 | /* Only the condition codes and the "in syscall" |
337 | * state can be modified in the %tstate register. | |
d09c2a23 | 338 | */ |
28e61036 DM |
339 | tstate &= (TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL); |
340 | regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL); | |
d09c2a23 DM |
341 | regs->tstate |= tstate; |
342 | } | |
343 | } | |
344 | ||
345 | if (!ret) { | |
346 | /* TPC, TNPC */ | |
347 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
348 | ®s->tpc, | |
349 | 33 * sizeof(u64), | |
350 | 35 * sizeof(u64)); | |
351 | } | |
352 | ||
353 | if (!ret) { | |
d3805c54 | 354 | unsigned long y = regs->y; |
d09c2a23 DM |
355 | |
356 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
357 | &y, | |
358 | 35 * sizeof(u64), | |
359 | 36 * sizeof(u64)); | |
360 | if (!ret) | |
361 | regs->y = y; | |
362 | } | |
363 | ||
364 | if (!ret) | |
365 | ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
366 | 36 * sizeof(u64), -1); | |
367 | ||
368 | return ret; | |
369 | } | |
370 | ||
371 | static int fpregs64_get(struct task_struct *target, | |
372 | const struct user_regset *regset, | |
373 | unsigned int pos, unsigned int count, | |
374 | void *kbuf, void __user *ubuf) | |
375 | { | |
376 | const unsigned long *fpregs = task_thread_info(target)->fpregs; | |
377 | unsigned long fprs, fsr, gsr; | |
378 | int ret; | |
379 | ||
380 | if (target == current) | |
381 | save_and_clear_fpu(); | |
382 | ||
383 | fprs = task_thread_info(target)->fpsaved[0]; | |
384 | ||
385 | if (fprs & FPRS_DL) | |
386 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
387 | fpregs, | |
388 | 0, 16 * sizeof(u64)); | |
389 | else | |
390 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
391 | 0, | |
392 | 16 * sizeof(u64)); | |
393 | ||
394 | if (!ret) { | |
395 | if (fprs & FPRS_DU) | |
396 | ret = user_regset_copyout(&pos, &count, | |
397 | &kbuf, &ubuf, | |
398 | fpregs + 16, | |
399 | 16 * sizeof(u64), | |
400 | 32 * sizeof(u64)); | |
401 | else | |
402 | ret = user_regset_copyout_zero(&pos, &count, | |
403 | &kbuf, &ubuf, | |
404 | 16 * sizeof(u64), | |
405 | 32 * sizeof(u64)); | |
406 | } | |
407 | ||
408 | if (fprs & FPRS_FEF) { | |
409 | fsr = task_thread_info(target)->xfsr[0]; | |
410 | gsr = task_thread_info(target)->gsr[0]; | |
411 | } else { | |
412 | fsr = gsr = 0; | |
413 | } | |
414 | ||
415 | if (!ret) | |
416 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
417 | &fsr, | |
418 | 32 * sizeof(u64), | |
419 | 33 * sizeof(u64)); | |
420 | if (!ret) | |
421 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
422 | &gsr, | |
423 | 33 * sizeof(u64), | |
424 | 34 * sizeof(u64)); | |
425 | if (!ret) | |
426 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
427 | &fprs, | |
428 | 34 * sizeof(u64), | |
429 | 35 * sizeof(u64)); | |
430 | ||
431 | if (!ret) | |
432 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
433 | 35 * sizeof(u64), -1); | |
434 | ||
435 | return ret; | |
436 | } | |
437 | ||
438 | static int fpregs64_set(struct task_struct *target, | |
439 | const struct user_regset *regset, | |
440 | unsigned int pos, unsigned int count, | |
441 | const void *kbuf, const void __user *ubuf) | |
442 | { | |
443 | unsigned long *fpregs = task_thread_info(target)->fpregs; | |
444 | unsigned long fprs; | |
445 | int ret; | |
446 | ||
447 | if (target == current) | |
448 | save_and_clear_fpu(); | |
449 | ||
450 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
451 | fpregs, | |
452 | 0, 32 * sizeof(u64)); | |
453 | if (!ret) | |
454 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
455 | task_thread_info(target)->xfsr, | |
456 | 32 * sizeof(u64), | |
457 | 33 * sizeof(u64)); | |
458 | if (!ret) | |
459 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
460 | task_thread_info(target)->gsr, | |
461 | 33 * sizeof(u64), | |
462 | 34 * sizeof(u64)); | |
463 | ||
464 | fprs = task_thread_info(target)->fpsaved[0]; | |
465 | if (!ret && count > 0) { | |
466 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
467 | &fprs, | |
468 | 34 * sizeof(u64), | |
469 | 35 * sizeof(u64)); | |
470 | } | |
471 | ||
472 | fprs |= (FPRS_FEF | FPRS_DL | FPRS_DU); | |
473 | task_thread_info(target)->fpsaved[0] = fprs; | |
474 | ||
475 | if (!ret) | |
476 | ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
477 | 35 * sizeof(u64), -1); | |
478 | return ret; | |
479 | } | |
480 | ||
481 | static const struct user_regset sparc64_regsets[] = { | |
482 | /* Format is: | |
483 | * G0 --> G7 | |
484 | * O0 --> O7 | |
485 | * L0 --> L7 | |
486 | * I0 --> I7 | |
487 | * TSTATE, TPC, TNPC, Y | |
488 | */ | |
489 | [REGSET_GENERAL] = { | |
490 | .core_note_type = NT_PRSTATUS, | |
3c503701 | 491 | .n = 36, |
d09c2a23 DM |
492 | .size = sizeof(u64), .align = sizeof(u64), |
493 | .get = genregs64_get, .set = genregs64_set | |
494 | }, | |
495 | /* Format is: | |
496 | * F0 --> F63 | |
497 | * FSR | |
498 | * GSR | |
499 | * FPRS | |
500 | */ | |
501 | [REGSET_FP] = { | |
502 | .core_note_type = NT_PRFPREG, | |
3c503701 | 503 | .n = 35, |
d09c2a23 DM |
504 | .size = sizeof(u64), .align = sizeof(u64), |
505 | .get = fpregs64_get, .set = fpregs64_set | |
506 | }, | |
507 | }; | |
508 | ||
509 | static const struct user_regset_view user_sparc64_view = { | |
510 | .name = "sparc64", .e_machine = EM_SPARCV9, | |
511 | .regsets = sparc64_regsets, .n = ARRAY_SIZE(sparc64_regsets) | |
512 | }; | |
513 | ||
11cc8a3a | 514 | #ifdef CONFIG_COMPAT |
d09c2a23 DM |
515 | static int genregs32_get(struct task_struct *target, |
516 | const struct user_regset *regset, | |
517 | unsigned int pos, unsigned int count, | |
518 | void *kbuf, void __user *ubuf) | |
519 | { | |
520 | const struct pt_regs *regs = task_pt_regs(target); | |
521 | compat_ulong_t __user *reg_window; | |
522 | compat_ulong_t *k = kbuf; | |
523 | compat_ulong_t __user *u = ubuf; | |
524 | compat_ulong_t reg; | |
525 | ||
526 | if (target == current) | |
527 | flushw_user(); | |
528 | ||
529 | pos /= sizeof(reg); | |
530 | count /= sizeof(reg); | |
531 | ||
532 | if (kbuf) { | |
533 | for (; count > 0 && pos < 16; count--) | |
534 | *k++ = regs->u_regs[pos++]; | |
535 | ||
536 | reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; | |
b857bd29 | 537 | reg_window -= 16; |
ad4f9576 DM |
538 | if (target == current) { |
539 | for (; count > 0 && pos < 32; count--) { | |
540 | if (get_user(*k++, ®_window[pos++])) | |
541 | return -EFAULT; | |
542 | } | |
543 | } else { | |
544 | for (; count > 0 && pos < 32; count--) { | |
545 | if (access_process_vm(target, | |
546 | (unsigned long) | |
547 | ®_window[pos], | |
f307ab6d LS |
548 | k, sizeof(*k), |
549 | FOLL_FORCE) | |
ad4f9576 DM |
550 | != sizeof(*k)) |
551 | return -EFAULT; | |
552 | k++; | |
553 | pos++; | |
554 | } | |
d09c2a23 DM |
555 | } |
556 | } else { | |
557 | for (; count > 0 && pos < 16; count--) { | |
558 | if (put_user((compat_ulong_t) regs->u_regs[pos++], u++)) | |
559 | return -EFAULT; | |
560 | } | |
561 | ||
562 | reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; | |
b857bd29 | 563 | reg_window -= 16; |
ad4f9576 DM |
564 | if (target == current) { |
565 | for (; count > 0 && pos < 32; count--) { | |
566 | if (get_user(reg, ®_window[pos++]) || | |
567 | put_user(reg, u++)) | |
568 | return -EFAULT; | |
569 | } | |
570 | } else { | |
571 | for (; count > 0 && pos < 32; count--) { | |
572 | if (access_process_vm(target, | |
573 | (unsigned long) | |
574 | ®_window[pos], | |
f307ab6d LS |
575 | ®, sizeof(reg), |
576 | FOLL_FORCE) | |
ad4f9576 DM |
577 | != sizeof(reg)) |
578 | return -EFAULT; | |
579 | if (access_process_vm(target, | |
580 | (unsigned long) u, | |
f307ab6d LS |
581 | ®, sizeof(reg), |
582 | FOLL_FORCE | FOLL_WRITE) | |
ad4f9576 DM |
583 | != sizeof(reg)) |
584 | return -EFAULT; | |
585 | pos++; | |
586 | u++; | |
587 | } | |
d09c2a23 DM |
588 | } |
589 | } | |
590 | while (count > 0) { | |
591 | switch (pos) { | |
592 | case 32: /* PSR */ | |
593 | reg = tstate_to_psr(regs->tstate); | |
594 | break; | |
595 | case 33: /* PC */ | |
596 | reg = regs->tpc; | |
597 | break; | |
598 | case 34: /* NPC */ | |
599 | reg = regs->tnpc; | |
600 | break; | |
601 | case 35: /* Y */ | |
602 | reg = regs->y; | |
603 | break; | |
604 | case 36: /* WIM */ | |
605 | case 37: /* TBR */ | |
606 | reg = 0; | |
607 | break; | |
608 | default: | |
609 | goto finish; | |
610 | } | |
611 | ||
612 | if (kbuf) | |
613 | *k++ = reg; | |
614 | else if (put_user(reg, u++)) | |
615 | return -EFAULT; | |
616 | pos++; | |
617 | count--; | |
618 | } | |
619 | finish: | |
620 | pos *= sizeof(reg); | |
621 | count *= sizeof(reg); | |
622 | ||
623 | return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
624 | 38 * sizeof(reg), -1); | |
625 | } | |
626 | ||
627 | static int genregs32_set(struct task_struct *target, | |
628 | const struct user_regset *regset, | |
629 | unsigned int pos, unsigned int count, | |
630 | const void *kbuf, const void __user *ubuf) | |
631 | { | |
632 | struct pt_regs *regs = task_pt_regs(target); | |
633 | compat_ulong_t __user *reg_window; | |
634 | const compat_ulong_t *k = kbuf; | |
635 | const compat_ulong_t __user *u = ubuf; | |
636 | compat_ulong_t reg; | |
637 | ||
638 | if (target == current) | |
639 | flushw_user(); | |
640 | ||
641 | pos /= sizeof(reg); | |
642 | count /= sizeof(reg); | |
643 | ||
644 | if (kbuf) { | |
645 | for (; count > 0 && pos < 16; count--) | |
646 | regs->u_regs[pos++] = *k++; | |
647 | ||
648 | reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; | |
b857bd29 | 649 | reg_window -= 16; |
ad4f9576 DM |
650 | if (target == current) { |
651 | for (; count > 0 && pos < 32; count--) { | |
652 | if (put_user(*k++, ®_window[pos++])) | |
653 | return -EFAULT; | |
654 | } | |
655 | } else { | |
656 | for (; count > 0 && pos < 32; count--) { | |
657 | if (access_process_vm(target, | |
658 | (unsigned long) | |
659 | ®_window[pos], | |
660 | (void *) k, | |
f307ab6d LS |
661 | sizeof(*k), |
662 | FOLL_FORCE | FOLL_WRITE) | |
ad4f9576 DM |
663 | != sizeof(*k)) |
664 | return -EFAULT; | |
665 | k++; | |
666 | pos++; | |
667 | } | |
d09c2a23 DM |
668 | } |
669 | } else { | |
670 | for (; count > 0 && pos < 16; count--) { | |
671 | if (get_user(reg, u++)) | |
672 | return -EFAULT; | |
673 | regs->u_regs[pos++] = reg; | |
674 | } | |
675 | ||
676 | reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; | |
b857bd29 | 677 | reg_window -= 16; |
ad4f9576 DM |
678 | if (target == current) { |
679 | for (; count > 0 && pos < 32; count--) { | |
680 | if (get_user(reg, u++) || | |
681 | put_user(reg, ®_window[pos++])) | |
682 | return -EFAULT; | |
683 | } | |
684 | } else { | |
685 | for (; count > 0 && pos < 32; count--) { | |
686 | if (access_process_vm(target, | |
687 | (unsigned long) | |
688 | u, | |
f307ab6d LS |
689 | ®, sizeof(reg), |
690 | FOLL_FORCE) | |
ad4f9576 DM |
691 | != sizeof(reg)) |
692 | return -EFAULT; | |
693 | if (access_process_vm(target, | |
694 | (unsigned long) | |
695 | ®_window[pos], | |
f307ab6d LS |
696 | ®, sizeof(reg), |
697 | FOLL_FORCE | FOLL_WRITE) | |
ad4f9576 DM |
698 | != sizeof(reg)) |
699 | return -EFAULT; | |
700 | pos++; | |
701 | u++; | |
702 | } | |
d09c2a23 DM |
703 | } |
704 | } | |
705 | while (count > 0) { | |
706 | unsigned long tstate; | |
707 | ||
708 | if (kbuf) | |
709 | reg = *k++; | |
710 | else if (get_user(reg, u++)) | |
711 | return -EFAULT; | |
712 | ||
713 | switch (pos) { | |
714 | case 32: /* PSR */ | |
715 | tstate = regs->tstate; | |
28e61036 | 716 | tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL); |
d09c2a23 | 717 | tstate |= psr_to_tstate_icc(reg); |
28e61036 DM |
718 | if (reg & PSR_SYSCALL) |
719 | tstate |= TSTATE_SYSCALL; | |
d09c2a23 DM |
720 | regs->tstate = tstate; |
721 | break; | |
722 | case 33: /* PC */ | |
723 | regs->tpc = reg; | |
724 | break; | |
725 | case 34: /* NPC */ | |
726 | regs->tnpc = reg; | |
727 | break; | |
728 | case 35: /* Y */ | |
729 | regs->y = reg; | |
730 | break; | |
731 | case 36: /* WIM */ | |
732 | case 37: /* TBR */ | |
733 | break; | |
734 | default: | |
735 | goto finish; | |
736 | } | |
737 | ||
738 | pos++; | |
739 | count--; | |
740 | } | |
741 | finish: | |
742 | pos *= sizeof(reg); | |
743 | count *= sizeof(reg); | |
744 | ||
745 | return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
746 | 38 * sizeof(reg), -1); | |
747 | } | |
748 | ||
749 | static int fpregs32_get(struct task_struct *target, | |
750 | const struct user_regset *regset, | |
751 | unsigned int pos, unsigned int count, | |
752 | void *kbuf, void __user *ubuf) | |
753 | { | |
754 | const unsigned long *fpregs = task_thread_info(target)->fpregs; | |
755 | compat_ulong_t enabled; | |
756 | unsigned long fprs; | |
757 | compat_ulong_t fsr; | |
758 | int ret = 0; | |
759 | ||
760 | if (target == current) | |
761 | save_and_clear_fpu(); | |
762 | ||
763 | fprs = task_thread_info(target)->fpsaved[0]; | |
764 | if (fprs & FPRS_FEF) { | |
765 | fsr = task_thread_info(target)->xfsr[0]; | |
766 | enabled = 1; | |
767 | } else { | |
768 | fsr = 0; | |
769 | enabled = 0; | |
770 | } | |
771 | ||
772 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
773 | fpregs, | |
774 | 0, 32 * sizeof(u32)); | |
775 | ||
776 | if (!ret) | |
777 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
778 | 32 * sizeof(u32), | |
779 | 33 * sizeof(u32)); | |
780 | if (!ret) | |
781 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
782 | &fsr, | |
783 | 33 * sizeof(u32), | |
784 | 34 * sizeof(u32)); | |
785 | ||
786 | if (!ret) { | |
787 | compat_ulong_t val; | |
788 | ||
789 | val = (enabled << 8) | (8 << 16); | |
790 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
791 | &val, | |
792 | 34 * sizeof(u32), | |
793 | 35 * sizeof(u32)); | |
794 | } | |
795 | ||
796 | if (!ret) | |
797 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
798 | 35 * sizeof(u32), -1); | |
799 | ||
800 | return ret; | |
801 | } | |
802 | ||
803 | static int fpregs32_set(struct task_struct *target, | |
804 | const struct user_regset *regset, | |
805 | unsigned int pos, unsigned int count, | |
806 | const void *kbuf, const void __user *ubuf) | |
807 | { | |
808 | unsigned long *fpregs = task_thread_info(target)->fpregs; | |
809 | unsigned long fprs; | |
810 | int ret; | |
811 | ||
812 | if (target == current) | |
813 | save_and_clear_fpu(); | |
814 | ||
815 | fprs = task_thread_info(target)->fpsaved[0]; | |
816 | ||
817 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
818 | fpregs, | |
819 | 0, 32 * sizeof(u32)); | |
820 | if (!ret) | |
821 | user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
822 | 32 * sizeof(u32), | |
823 | 33 * sizeof(u32)); | |
824 | if (!ret && count > 0) { | |
825 | compat_ulong_t fsr; | |
826 | unsigned long val; | |
827 | ||
828 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
829 | &fsr, | |
830 | 33 * sizeof(u32), | |
831 | 34 * sizeof(u32)); | |
832 | if (!ret) { | |
833 | val = task_thread_info(target)->xfsr[0]; | |
834 | val &= 0xffffffff00000000UL; | |
835 | val |= fsr; | |
836 | task_thread_info(target)->xfsr[0] = val; | |
837 | } | |
838 | } | |
839 | ||
840 | fprs |= (FPRS_FEF | FPRS_DL); | |
841 | task_thread_info(target)->fpsaved[0] = fprs; | |
842 | ||
843 | if (!ret) | |
844 | ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
845 | 34 * sizeof(u32), -1); | |
846 | return ret; | |
847 | } | |
848 | ||
849 | static const struct user_regset sparc32_regsets[] = { | |
850 | /* Format is: | |
851 | * G0 --> G7 | |
852 | * O0 --> O7 | |
853 | * L0 --> L7 | |
854 | * I0 --> I7 | |
855 | * PSR, PC, nPC, Y, WIM, TBR | |
856 | */ | |
857 | [REGSET_GENERAL] = { | |
858 | .core_note_type = NT_PRSTATUS, | |
3c503701 | 859 | .n = 38, |
d09c2a23 DM |
860 | .size = sizeof(u32), .align = sizeof(u32), |
861 | .get = genregs32_get, .set = genregs32_set | |
862 | }, | |
863 | /* Format is: | |
864 | * F0 --> F31 | |
865 | * empty 32-bit word | |
866 | * FSR (32--bit word) | |
867 | * FPU QUEUE COUNT (8-bit char) | |
868 | * FPU QUEUE ENTRYSIZE (8-bit char) | |
869 | * FPU ENABLED (8-bit char) | |
870 | * empty 8-bit char | |
871 | * FPU QUEUE (64 32-bit ints) | |
872 | */ | |
873 | [REGSET_FP] = { | |
874 | .core_note_type = NT_PRFPREG, | |
3c503701 | 875 | .n = 99, |
d09c2a23 DM |
876 | .size = sizeof(u32), .align = sizeof(u32), |
877 | .get = fpregs32_get, .set = fpregs32_set | |
878 | }, | |
879 | }; | |
880 | ||
881 | static const struct user_regset_view user_sparc32_view = { | |
882 | .name = "sparc", .e_machine = EM_SPARC, | |
883 | .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets) | |
884 | }; | |
11cc8a3a | 885 | #endif /* CONFIG_COMPAT */ |
d09c2a23 DM |
886 | |
887 | const struct user_regset_view *task_user_regset_view(struct task_struct *task) | |
888 | { | |
11cc8a3a | 889 | #ifdef CONFIG_COMPAT |
d09c2a23 DM |
890 | if (test_tsk_thread_flag(task, TIF_32BIT)) |
891 | return &user_sparc32_view; | |
11cc8a3a | 892 | #endif |
d09c2a23 DM |
893 | return &user_sparc64_view; |
894 | } | |
895 | ||
11cc8a3a | 896 | #ifdef CONFIG_COMPAT |
2ba85f3a DM |
897 | struct compat_fps { |
898 | unsigned int regs[32]; | |
899 | unsigned int fsr; | |
900 | unsigned int flags; | |
901 | unsigned int extra; | |
902 | unsigned int fpqd; | |
903 | struct compat_fq { | |
904 | unsigned int insnaddr; | |
905 | unsigned int insn; | |
906 | } fpq[16]; | |
907 | }; | |
908 | ||
909 | long compat_arch_ptrace(struct task_struct *child, compat_long_t request, | |
910 | compat_ulong_t caddr, compat_ulong_t cdata) | |
1da177e4 | 911 | { |
d786a4a6 | 912 | const struct user_regset_view *view = task_user_regset_view(current); |
2ba85f3a DM |
913 | compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4]; |
914 | struct pt_regs32 __user *pregs; | |
915 | struct compat_fps __user *fps; | |
916 | unsigned long addr2 = caddr2; | |
917 | unsigned long addr = caddr; | |
918 | unsigned long data = cdata; | |
9473272a | 919 | int ret; |
1da177e4 | 920 | |
2ba85f3a DM |
921 | pregs = (struct pt_regs32 __user *) addr; |
922 | fps = (struct compat_fps __user *) addr; | |
1da177e4 | 923 | |
2ba85f3a | 924 | switch (request) { |
1759e58e | 925 | case PTRACE_PEEKUSR: |
9775369e DM |
926 | ret = (addr != 0) ? -EIO : 0; |
927 | break; | |
1759e58e | 928 | |
2ba85f3a | 929 | case PTRACE_GETREGS: |
9473272a DM |
930 | ret = copy_regset_to_user(child, view, REGSET_GENERAL, |
931 | 32 * sizeof(u32), | |
932 | 4 * sizeof(u32), | |
933 | &pregs->psr); | |
934 | if (!ret) | |
935 | ret = copy_regset_to_user(child, view, REGSET_GENERAL, | |
936 | 1 * sizeof(u32), | |
937 | 15 * sizeof(u32), | |
938 | &pregs->u_regs[0]); | |
9775369e | 939 | break; |
9473272a | 940 | |
2ba85f3a | 941 | case PTRACE_SETREGS: |
9473272a DM |
942 | ret = copy_regset_from_user(child, view, REGSET_GENERAL, |
943 | 32 * sizeof(u32), | |
944 | 4 * sizeof(u32), | |
945 | &pregs->psr); | |
946 | if (!ret) | |
947 | ret = copy_regset_from_user(child, view, REGSET_GENERAL, | |
948 | 1 * sizeof(u32), | |
949 | 15 * sizeof(u32), | |
950 | &pregs->u_regs[0]); | |
9775369e | 951 | break; |
9775369e | 952 | |
2ba85f3a | 953 | case PTRACE_GETFPREGS: |
9473272a DM |
954 | ret = copy_regset_to_user(child, view, REGSET_FP, |
955 | 0 * sizeof(u32), | |
956 | 32 * sizeof(u32), | |
957 | &fps->regs[0]); | |
958 | if (!ret) | |
959 | ret = copy_regset_to_user(child, view, REGSET_FP, | |
960 | 33 * sizeof(u32), | |
961 | 1 * sizeof(u32), | |
962 | &fps->fsr); | |
963 | if (!ret) { | |
964 | if (__put_user(0, &fps->flags) || | |
965 | __put_user(0, &fps->extra) || | |
966 | __put_user(0, &fps->fpqd) || | |
967 | clear_user(&fps->fpq[0], 32 * sizeof(unsigned int))) | |
968 | ret = -EFAULT; | |
969 | } | |
9775369e | 970 | break; |
9775369e | 971 | |
2ba85f3a | 972 | case PTRACE_SETFPREGS: |
9473272a DM |
973 | ret = copy_regset_from_user(child, view, REGSET_FP, |
974 | 0 * sizeof(u32), | |
975 | 32 * sizeof(u32), | |
976 | &fps->regs[0]); | |
977 | if (!ret) | |
978 | ret = copy_regset_from_user(child, view, REGSET_FP, | |
979 | 33 * sizeof(u32), | |
980 | 1 * sizeof(u32), | |
981 | &fps->fsr); | |
9775369e | 982 | break; |
2ba85f3a DM |
983 | |
984 | case PTRACE_READTEXT: | |
985 | case PTRACE_READDATA: | |
986 | ret = ptrace_readdata(child, addr, | |
987 | (char __user *)addr2, data); | |
988 | if (ret == data) | |
989 | ret = 0; | |
990 | else if (ret >= 0) | |
991 | ret = -EIO; | |
992 | break; | |
993 | ||
994 | case PTRACE_WRITETEXT: | |
995 | case PTRACE_WRITEDATA: | |
996 | ret = ptrace_writedata(child, (char __user *) addr2, | |
997 | addr, data); | |
998 | if (ret == data) | |
999 | ret = 0; | |
1000 | else if (ret >= 0) | |
1001 | ret = -EIO; | |
1002 | break; | |
1003 | ||
1004 | default: | |
986bef85 DM |
1005 | if (request == PTRACE_SPARC_DETACH) |
1006 | request = PTRACE_DETACH; | |
2ba85f3a DM |
1007 | ret = compat_ptrace_request(child, request, addr, data); |
1008 | break; | |
1da177e4 LT |
1009 | } |
1010 | ||
2ba85f3a DM |
1011 | return ret; |
1012 | } | |
11cc8a3a | 1013 | #endif /* CONFIG_COMPAT */ |
2ba85f3a DM |
1014 | |
1015 | struct fps { | |
1016 | unsigned int regs[64]; | |
1017 | unsigned long fsr; | |
1018 | }; | |
1019 | ||
9b05a69e NK |
1020 | long arch_ptrace(struct task_struct *child, long request, |
1021 | unsigned long addr, unsigned long data) | |
2ba85f3a | 1022 | { |
d786a4a6 | 1023 | const struct user_regset_view *view = task_user_regset_view(current); |
2ba85f3a | 1024 | unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4]; |
bfdf9ebc DM |
1025 | struct pt_regs __user *pregs; |
1026 | struct fps __user *fps; | |
a9384e23 | 1027 | void __user *addr2p; |
2ba85f3a DM |
1028 | int ret; |
1029 | ||
9b05a69e NK |
1030 | pregs = (struct pt_regs __user *) addr; |
1031 | fps = (struct fps __user *) addr; | |
a9384e23 | 1032 | addr2p = (void __user *) addr2; |
bfdf9ebc | 1033 | |
2ba85f3a DM |
1034 | switch (request) { |
1035 | case PTRACE_PEEKUSR: | |
1036 | ret = (addr != 0) ? -EIO : 0; | |
1037 | break; | |
9775369e | 1038 | |
2ba85f3a DM |
1039 | case PTRACE_GETREGS64: |
1040 | ret = copy_regset_to_user(child, view, REGSET_GENERAL, | |
1041 | 1 * sizeof(u64), | |
1042 | 15 * sizeof(u64), | |
1043 | &pregs->u_regs[0]); | |
1044 | if (!ret) { | |
1045 | /* XXX doesn't handle 'y' register correctly XXX */ | |
1046 | ret = copy_regset_to_user(child, view, REGSET_GENERAL, | |
1047 | 32 * sizeof(u64), | |
1048 | 4 * sizeof(u64), | |
1049 | &pregs->tstate); | |
1050 | } | |
1051 | break; | |
1052 | ||
1053 | case PTRACE_SETREGS64: | |
1054 | ret = copy_regset_from_user(child, view, REGSET_GENERAL, | |
1055 | 1 * sizeof(u64), | |
1056 | 15 * sizeof(u64), | |
1057 | &pregs->u_regs[0]); | |
1058 | if (!ret) { | |
1059 | /* XXX doesn't handle 'y' register correctly XXX */ | |
1060 | ret = copy_regset_from_user(child, view, REGSET_GENERAL, | |
1061 | 32 * sizeof(u64), | |
1062 | 4 * sizeof(u64), | |
1063 | &pregs->tstate); | |
1064 | } | |
1065 | break; | |
1066 | ||
1067 | case PTRACE_GETFPREGS64: | |
1068 | ret = copy_regset_to_user(child, view, REGSET_FP, | |
1069 | 0 * sizeof(u64), | |
1070 | 33 * sizeof(u64), | |
1071 | fps); | |
1072 | break; | |
1073 | ||
1074 | case PTRACE_SETFPREGS64: | |
ee4ee527 | 1075 | ret = copy_regset_from_user(child, view, REGSET_FP, |
9473272a DM |
1076 | 0 * sizeof(u64), |
1077 | 33 * sizeof(u64), | |
1078 | fps); | |
9775369e | 1079 | break; |
1da177e4 LT |
1080 | |
1081 | case PTRACE_READTEXT: | |
9775369e | 1082 | case PTRACE_READDATA: |
a9384e23 | 1083 | ret = ptrace_readdata(child, addr, addr2p, data); |
9775369e DM |
1084 | if (ret == data) |
1085 | ret = 0; | |
1086 | else if (ret >= 0) | |
1087 | ret = -EIO; | |
1088 | break; | |
1da177e4 LT |
1089 | |
1090 | case PTRACE_WRITETEXT: | |
9775369e | 1091 | case PTRACE_WRITEDATA: |
a9384e23 | 1092 | ret = ptrace_writedata(child, addr2p, addr, data); |
9775369e DM |
1093 | if (ret == data) |
1094 | ret = 0; | |
1095 | else if (ret >= 0) | |
1096 | ret = -EIO; | |
1097 | break; | |
1da177e4 | 1098 | |
9775369e | 1099 | default: |
986bef85 DM |
1100 | if (request == PTRACE_SPARC_DETACH) |
1101 | request = PTRACE_DETACH; | |
9775369e DM |
1102 | ret = ptrace_request(child, request, addr, data); |
1103 | break; | |
1da177e4 | 1104 | } |
9775369e DM |
1105 | |
1106 | return ret; | |
1da177e4 LT |
1107 | } |
1108 | ||
fe06ccaa | 1109 | asmlinkage int syscall_trace_enter(struct pt_regs *regs) |
1da177e4 | 1110 | { |
73ccefab RM |
1111 | int ret = 0; |
1112 | ||
bb49bcda | 1113 | /* do the secure computing check first */ |
e4da89d0 | 1114 | secure_computing_strict(regs->u_regs[UREG_G1]); |
bb49bcda | 1115 | |
812cb83a KT |
1116 | if (test_thread_flag(TIF_NOHZ)) |
1117 | user_exit(); | |
1118 | ||
fe06ccaa DM |
1119 | if (test_thread_flag(TIF_SYSCALL_TRACE)) |
1120 | ret = tracehook_report_syscall_entry(regs); | |
f7ceba36 | 1121 | |
c658ad1b DM |
1122 | if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) |
1123 | trace_sys_enter(regs, regs->u_regs[UREG_G1]); | |
1124 | ||
91397401 EP |
1125 | audit_syscall_entry(regs->u_regs[UREG_G1], regs->u_regs[UREG_I0], |
1126 | regs->u_regs[UREG_I1], regs->u_regs[UREG_I2], | |
b05d8447 | 1127 | regs->u_regs[UREG_I3]); |
73ccefab RM |
1128 | |
1129 | return ret; | |
1da177e4 | 1130 | } |
fe06ccaa DM |
1131 | |
1132 | asmlinkage void syscall_trace_leave(struct pt_regs *regs) | |
1133 | { | |
812cb83a KT |
1134 | if (test_thread_flag(TIF_NOHZ)) |
1135 | user_exit(); | |
1136 | ||
d7e7528b | 1137 | audit_syscall_exit(regs); |
fe06ccaa | 1138 | |
c658ad1b | 1139 | if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) |
04001552 | 1140 | trace_sys_exit(regs, regs->u_regs[UREG_I0]); |
c658ad1b | 1141 | |
fe06ccaa DM |
1142 | if (test_thread_flag(TIF_SYSCALL_TRACE)) |
1143 | tracehook_report_syscall_exit(regs, 0); | |
812cb83a KT |
1144 | |
1145 | if (test_thread_flag(TIF_NOHZ)) | |
1146 | user_enter(); | |
fe06ccaa | 1147 | } |
e8f4aa60 AP |
1148 | |
1149 | /** | |
1150 | * regs_query_register_offset() - query register offset from its name | |
1151 | * @name: the name of a register | |
1152 | * | |
1153 | * regs_query_register_offset() returns the offset of a register in struct | |
1154 | * pt_regs from its name. If the name is invalid, this returns -EINVAL; | |
1155 | */ | |
1156 | int regs_query_register_offset(const char *name) | |
1157 | { | |
1158 | const struct pt_regs_offset *roff; | |
1159 | ||
1160 | for (roff = regoffset_table; roff->name != NULL; roff++) | |
1161 | if (!strcmp(roff->name, name)) | |
1162 | return roff->offset; | |
1163 | return -EINVAL; | |
1164 | } |