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