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Commit | Line | Data |
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478fcb2c WD |
1 | /* |
2 | * Based on arch/arm/kernel/ptrace.c | |
3 | * | |
4 | * By Ross Biro 1/23/92 | |
5 | * edited by Linus Torvalds | |
6 | * ARM modifications Copyright (C) 2000 Russell King | |
7 | * Copyright (C) 2012 ARM Ltd. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
5701ede8 | 22 | #include <linux/audit.h> |
fd92d4a5 | 23 | #include <linux/compat.h> |
478fcb2c WD |
24 | #include <linux/kernel.h> |
25 | #include <linux/sched.h> | |
26 | #include <linux/mm.h> | |
27 | #include <linux/smp.h> | |
28 | #include <linux/ptrace.h> | |
29 | #include <linux/user.h> | |
a1ae65b2 | 30 | #include <linux/seccomp.h> |
478fcb2c WD |
31 | #include <linux/security.h> |
32 | #include <linux/init.h> | |
33 | #include <linux/signal.h> | |
34 | #include <linux/uaccess.h> | |
35 | #include <linux/perf_event.h> | |
36 | #include <linux/hw_breakpoint.h> | |
37 | #include <linux/regset.h> | |
38 | #include <linux/tracehook.h> | |
39 | #include <linux/elf.h> | |
40 | ||
41 | #include <asm/compat.h> | |
42 | #include <asm/debug-monitors.h> | |
43 | #include <asm/pgtable.h> | |
5701ede8 | 44 | #include <asm/syscall.h> |
478fcb2c WD |
45 | #include <asm/traps.h> |
46 | #include <asm/system_misc.h> | |
47 | ||
055b1212 AT |
48 | #define CREATE_TRACE_POINTS |
49 | #include <trace/events/syscalls.h> | |
50 | ||
478fcb2c WD |
51 | /* |
52 | * TODO: does not yet catch signals sent when the child dies. | |
53 | * in exit.c or in signal.c. | |
54 | */ | |
55 | ||
56 | /* | |
57 | * Called by kernel/ptrace.c when detaching.. | |
58 | */ | |
59 | void ptrace_disable(struct task_struct *child) | |
60 | { | |
61 | } | |
62 | ||
478fcb2c WD |
63 | #ifdef CONFIG_HAVE_HW_BREAKPOINT |
64 | /* | |
65 | * Handle hitting a HW-breakpoint. | |
66 | */ | |
67 | static void ptrace_hbptriggered(struct perf_event *bp, | |
68 | struct perf_sample_data *data, | |
69 | struct pt_regs *regs) | |
70 | { | |
71 | struct arch_hw_breakpoint *bkpt = counter_arch_bp(bp); | |
72 | siginfo_t info = { | |
73 | .si_signo = SIGTRAP, | |
74 | .si_errno = 0, | |
75 | .si_code = TRAP_HWBKPT, | |
76 | .si_addr = (void __user *)(bkpt->trigger), | |
77 | }; | |
78 | ||
79 | #ifdef CONFIG_COMPAT | |
80 | int i; | |
81 | ||
82 | if (!is_compat_task()) | |
83 | goto send_sig; | |
84 | ||
85 | for (i = 0; i < ARM_MAX_BRP; ++i) { | |
86 | if (current->thread.debug.hbp_break[i] == bp) { | |
87 | info.si_errno = (i << 1) + 1; | |
88 | break; | |
89 | } | |
90 | } | |
27d7ff27 WD |
91 | |
92 | for (i = 0; i < ARM_MAX_WRP; ++i) { | |
478fcb2c WD |
93 | if (current->thread.debug.hbp_watch[i] == bp) { |
94 | info.si_errno = -((i << 1) + 1); | |
95 | break; | |
96 | } | |
97 | } | |
98 | ||
99 | send_sig: | |
100 | #endif | |
101 | force_sig_info(SIGTRAP, &info, current); | |
102 | } | |
103 | ||
104 | /* | |
105 | * Unregister breakpoints from this task and reset the pointers in | |
106 | * the thread_struct. | |
107 | */ | |
108 | void flush_ptrace_hw_breakpoint(struct task_struct *tsk) | |
109 | { | |
110 | int i; | |
111 | struct thread_struct *t = &tsk->thread; | |
112 | ||
113 | for (i = 0; i < ARM_MAX_BRP; i++) { | |
114 | if (t->debug.hbp_break[i]) { | |
115 | unregister_hw_breakpoint(t->debug.hbp_break[i]); | |
116 | t->debug.hbp_break[i] = NULL; | |
117 | } | |
118 | } | |
119 | ||
120 | for (i = 0; i < ARM_MAX_WRP; i++) { | |
121 | if (t->debug.hbp_watch[i]) { | |
122 | unregister_hw_breakpoint(t->debug.hbp_watch[i]); | |
123 | t->debug.hbp_watch[i] = NULL; | |
124 | } | |
125 | } | |
126 | } | |
127 | ||
128 | void ptrace_hw_copy_thread(struct task_struct *tsk) | |
129 | { | |
130 | memset(&tsk->thread.debug, 0, sizeof(struct debug_info)); | |
131 | } | |
132 | ||
133 | static struct perf_event *ptrace_hbp_get_event(unsigned int note_type, | |
134 | struct task_struct *tsk, | |
135 | unsigned long idx) | |
136 | { | |
137 | struct perf_event *bp = ERR_PTR(-EINVAL); | |
138 | ||
139 | switch (note_type) { | |
140 | case NT_ARM_HW_BREAK: | |
141 | if (idx < ARM_MAX_BRP) | |
142 | bp = tsk->thread.debug.hbp_break[idx]; | |
143 | break; | |
144 | case NT_ARM_HW_WATCH: | |
145 | if (idx < ARM_MAX_WRP) | |
146 | bp = tsk->thread.debug.hbp_watch[idx]; | |
147 | break; | |
148 | } | |
149 | ||
150 | return bp; | |
151 | } | |
152 | ||
153 | static int ptrace_hbp_set_event(unsigned int note_type, | |
154 | struct task_struct *tsk, | |
155 | unsigned long idx, | |
156 | struct perf_event *bp) | |
157 | { | |
158 | int err = -EINVAL; | |
159 | ||
160 | switch (note_type) { | |
161 | case NT_ARM_HW_BREAK: | |
162 | if (idx < ARM_MAX_BRP) { | |
163 | tsk->thread.debug.hbp_break[idx] = bp; | |
164 | err = 0; | |
165 | } | |
166 | break; | |
167 | case NT_ARM_HW_WATCH: | |
168 | if (idx < ARM_MAX_WRP) { | |
169 | tsk->thread.debug.hbp_watch[idx] = bp; | |
170 | err = 0; | |
171 | } | |
172 | break; | |
173 | } | |
174 | ||
175 | return err; | |
176 | } | |
177 | ||
178 | static struct perf_event *ptrace_hbp_create(unsigned int note_type, | |
179 | struct task_struct *tsk, | |
180 | unsigned long idx) | |
181 | { | |
182 | struct perf_event *bp; | |
183 | struct perf_event_attr attr; | |
184 | int err, type; | |
185 | ||
186 | switch (note_type) { | |
187 | case NT_ARM_HW_BREAK: | |
188 | type = HW_BREAKPOINT_X; | |
189 | break; | |
190 | case NT_ARM_HW_WATCH: | |
191 | type = HW_BREAKPOINT_RW; | |
192 | break; | |
193 | default: | |
194 | return ERR_PTR(-EINVAL); | |
195 | } | |
196 | ||
197 | ptrace_breakpoint_init(&attr); | |
198 | ||
199 | /* | |
200 | * Initialise fields to sane defaults | |
201 | * (i.e. values that will pass validation). | |
202 | */ | |
203 | attr.bp_addr = 0; | |
204 | attr.bp_len = HW_BREAKPOINT_LEN_4; | |
205 | attr.bp_type = type; | |
206 | attr.disabled = 1; | |
207 | ||
208 | bp = register_user_hw_breakpoint(&attr, ptrace_hbptriggered, NULL, tsk); | |
209 | if (IS_ERR(bp)) | |
210 | return bp; | |
211 | ||
212 | err = ptrace_hbp_set_event(note_type, tsk, idx, bp); | |
213 | if (err) | |
214 | return ERR_PTR(err); | |
215 | ||
216 | return bp; | |
217 | } | |
218 | ||
219 | static int ptrace_hbp_fill_attr_ctrl(unsigned int note_type, | |
220 | struct arch_hw_breakpoint_ctrl ctrl, | |
221 | struct perf_event_attr *attr) | |
222 | { | |
8f34a1da WD |
223 | int err, len, type, disabled = !ctrl.enabled; |
224 | ||
cdc27c27 WD |
225 | attr->disabled = disabled; |
226 | if (disabled) | |
227 | return 0; | |
228 | ||
229 | err = arch_bp_generic_fields(ctrl, &len, &type); | |
230 | if (err) | |
231 | return err; | |
232 | ||
233 | switch (note_type) { | |
234 | case NT_ARM_HW_BREAK: | |
235 | if ((type & HW_BREAKPOINT_X) != type) | |
478fcb2c | 236 | return -EINVAL; |
cdc27c27 WD |
237 | break; |
238 | case NT_ARM_HW_WATCH: | |
239 | if ((type & HW_BREAKPOINT_RW) != type) | |
240 | return -EINVAL; | |
241 | break; | |
242 | default: | |
243 | return -EINVAL; | |
478fcb2c WD |
244 | } |
245 | ||
246 | attr->bp_len = len; | |
247 | attr->bp_type = type; | |
478fcb2c WD |
248 | |
249 | return 0; | |
250 | } | |
251 | ||
252 | static int ptrace_hbp_get_resource_info(unsigned int note_type, u32 *info) | |
253 | { | |
254 | u8 num; | |
255 | u32 reg = 0; | |
256 | ||
257 | switch (note_type) { | |
258 | case NT_ARM_HW_BREAK: | |
259 | num = hw_breakpoint_slots(TYPE_INST); | |
260 | break; | |
261 | case NT_ARM_HW_WATCH: | |
262 | num = hw_breakpoint_slots(TYPE_DATA); | |
263 | break; | |
264 | default: | |
265 | return -EINVAL; | |
266 | } | |
267 | ||
268 | reg |= debug_monitors_arch(); | |
269 | reg <<= 8; | |
270 | reg |= num; | |
271 | ||
272 | *info = reg; | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static int ptrace_hbp_get_ctrl(unsigned int note_type, | |
277 | struct task_struct *tsk, | |
278 | unsigned long idx, | |
279 | u32 *ctrl) | |
280 | { | |
281 | struct perf_event *bp = ptrace_hbp_get_event(note_type, tsk, idx); | |
282 | ||
283 | if (IS_ERR(bp)) | |
284 | return PTR_ERR(bp); | |
285 | ||
286 | *ctrl = bp ? encode_ctrl_reg(counter_arch_bp(bp)->ctrl) : 0; | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int ptrace_hbp_get_addr(unsigned int note_type, | |
291 | struct task_struct *tsk, | |
292 | unsigned long idx, | |
293 | u64 *addr) | |
294 | { | |
295 | struct perf_event *bp = ptrace_hbp_get_event(note_type, tsk, idx); | |
296 | ||
297 | if (IS_ERR(bp)) | |
298 | return PTR_ERR(bp); | |
299 | ||
300 | *addr = bp ? bp->attr.bp_addr : 0; | |
301 | return 0; | |
302 | } | |
303 | ||
304 | static struct perf_event *ptrace_hbp_get_initialised_bp(unsigned int note_type, | |
305 | struct task_struct *tsk, | |
306 | unsigned long idx) | |
307 | { | |
308 | struct perf_event *bp = ptrace_hbp_get_event(note_type, tsk, idx); | |
309 | ||
310 | if (!bp) | |
311 | bp = ptrace_hbp_create(note_type, tsk, idx); | |
312 | ||
313 | return bp; | |
314 | } | |
315 | ||
316 | static int ptrace_hbp_set_ctrl(unsigned int note_type, | |
317 | struct task_struct *tsk, | |
318 | unsigned long idx, | |
319 | u32 uctrl) | |
320 | { | |
321 | int err; | |
322 | struct perf_event *bp; | |
323 | struct perf_event_attr attr; | |
324 | struct arch_hw_breakpoint_ctrl ctrl; | |
325 | ||
326 | bp = ptrace_hbp_get_initialised_bp(note_type, tsk, idx); | |
327 | if (IS_ERR(bp)) { | |
328 | err = PTR_ERR(bp); | |
329 | return err; | |
330 | } | |
331 | ||
332 | attr = bp->attr; | |
333 | decode_ctrl_reg(uctrl, &ctrl); | |
334 | err = ptrace_hbp_fill_attr_ctrl(note_type, ctrl, &attr); | |
335 | if (err) | |
336 | return err; | |
337 | ||
338 | return modify_user_hw_breakpoint(bp, &attr); | |
339 | } | |
340 | ||
341 | static int ptrace_hbp_set_addr(unsigned int note_type, | |
342 | struct task_struct *tsk, | |
343 | unsigned long idx, | |
344 | u64 addr) | |
345 | { | |
346 | int err; | |
347 | struct perf_event *bp; | |
348 | struct perf_event_attr attr; | |
349 | ||
350 | bp = ptrace_hbp_get_initialised_bp(note_type, tsk, idx); | |
351 | if (IS_ERR(bp)) { | |
352 | err = PTR_ERR(bp); | |
353 | return err; | |
354 | } | |
355 | ||
356 | attr = bp->attr; | |
357 | attr.bp_addr = addr; | |
358 | err = modify_user_hw_breakpoint(bp, &attr); | |
359 | return err; | |
360 | } | |
361 | ||
362 | #define PTRACE_HBP_ADDR_SZ sizeof(u64) | |
363 | #define PTRACE_HBP_CTRL_SZ sizeof(u32) | |
7797d17c | 364 | #define PTRACE_HBP_PAD_SZ sizeof(u32) |
478fcb2c WD |
365 | |
366 | static int hw_break_get(struct task_struct *target, | |
367 | const struct user_regset *regset, | |
368 | unsigned int pos, unsigned int count, | |
369 | void *kbuf, void __user *ubuf) | |
370 | { | |
371 | unsigned int note_type = regset->core_note_type; | |
7797d17c | 372 | int ret, idx = 0, offset, limit; |
478fcb2c WD |
373 | u32 info, ctrl; |
374 | u64 addr; | |
375 | ||
376 | /* Resource info */ | |
377 | ret = ptrace_hbp_get_resource_info(note_type, &info); | |
378 | if (ret) | |
379 | return ret; | |
380 | ||
7797d17c WD |
381 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &info, 0, |
382 | sizeof(info)); | |
383 | if (ret) | |
384 | return ret; | |
385 | ||
386 | /* Pad */ | |
387 | offset = offsetof(struct user_hwdebug_state, pad); | |
388 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, offset, | |
389 | offset + PTRACE_HBP_PAD_SZ); | |
478fcb2c WD |
390 | if (ret) |
391 | return ret; | |
392 | ||
393 | /* (address, ctrl) registers */ | |
7797d17c | 394 | offset = offsetof(struct user_hwdebug_state, dbg_regs); |
478fcb2c WD |
395 | limit = regset->n * regset->size; |
396 | while (count && offset < limit) { | |
397 | ret = ptrace_hbp_get_addr(note_type, target, idx, &addr); | |
398 | if (ret) | |
399 | return ret; | |
400 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &addr, | |
401 | offset, offset + PTRACE_HBP_ADDR_SZ); | |
402 | if (ret) | |
403 | return ret; | |
404 | offset += PTRACE_HBP_ADDR_SZ; | |
405 | ||
406 | ret = ptrace_hbp_get_ctrl(note_type, target, idx, &ctrl); | |
407 | if (ret) | |
408 | return ret; | |
409 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &ctrl, | |
410 | offset, offset + PTRACE_HBP_CTRL_SZ); | |
411 | if (ret) | |
412 | return ret; | |
413 | offset += PTRACE_HBP_CTRL_SZ; | |
7797d17c WD |
414 | |
415 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
416 | offset, | |
417 | offset + PTRACE_HBP_PAD_SZ); | |
418 | if (ret) | |
419 | return ret; | |
420 | offset += PTRACE_HBP_PAD_SZ; | |
478fcb2c WD |
421 | idx++; |
422 | } | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
427 | static int hw_break_set(struct task_struct *target, | |
428 | const struct user_regset *regset, | |
429 | unsigned int pos, unsigned int count, | |
430 | const void *kbuf, const void __user *ubuf) | |
431 | { | |
432 | unsigned int note_type = regset->core_note_type; | |
7797d17c | 433 | int ret, idx = 0, offset, limit; |
478fcb2c WD |
434 | u32 ctrl; |
435 | u64 addr; | |
436 | ||
7797d17c WD |
437 | /* Resource info and pad */ |
438 | offset = offsetof(struct user_hwdebug_state, dbg_regs); | |
439 | ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, offset); | |
478fcb2c WD |
440 | if (ret) |
441 | return ret; | |
442 | ||
443 | /* (address, ctrl) registers */ | |
444 | limit = regset->n * regset->size; | |
445 | while (count && offset < limit) { | |
446 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &addr, | |
447 | offset, offset + PTRACE_HBP_ADDR_SZ); | |
448 | if (ret) | |
449 | return ret; | |
450 | ret = ptrace_hbp_set_addr(note_type, target, idx, addr); | |
451 | if (ret) | |
452 | return ret; | |
453 | offset += PTRACE_HBP_ADDR_SZ; | |
454 | ||
455 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &ctrl, | |
456 | offset, offset + PTRACE_HBP_CTRL_SZ); | |
457 | if (ret) | |
458 | return ret; | |
459 | ret = ptrace_hbp_set_ctrl(note_type, target, idx, ctrl); | |
460 | if (ret) | |
461 | return ret; | |
462 | offset += PTRACE_HBP_CTRL_SZ; | |
7797d17c WD |
463 | |
464 | ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
465 | offset, | |
466 | offset + PTRACE_HBP_PAD_SZ); | |
467 | if (ret) | |
468 | return ret; | |
469 | offset += PTRACE_HBP_PAD_SZ; | |
478fcb2c WD |
470 | idx++; |
471 | } | |
472 | ||
473 | return 0; | |
474 | } | |
475 | #endif /* CONFIG_HAVE_HW_BREAKPOINT */ | |
476 | ||
477 | static int gpr_get(struct task_struct *target, | |
478 | const struct user_regset *regset, | |
479 | unsigned int pos, unsigned int count, | |
480 | void *kbuf, void __user *ubuf) | |
481 | { | |
482 | struct user_pt_regs *uregs = &task_pt_regs(target)->user_regs; | |
483 | return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0, -1); | |
484 | } | |
485 | ||
486 | static int gpr_set(struct task_struct *target, const struct user_regset *regset, | |
487 | unsigned int pos, unsigned int count, | |
488 | const void *kbuf, const void __user *ubuf) | |
489 | { | |
490 | int ret; | |
491 | struct user_pt_regs newregs; | |
492 | ||
493 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newregs, 0, -1); | |
494 | if (ret) | |
495 | return ret; | |
496 | ||
497 | if (!valid_user_regs(&newregs)) | |
498 | return -EINVAL; | |
499 | ||
500 | task_pt_regs(target)->user_regs = newregs; | |
501 | return 0; | |
502 | } | |
503 | ||
504 | /* | |
505 | * TODO: update fp accessors for lazy context switching (sync/flush hwstate) | |
506 | */ | |
507 | static int fpr_get(struct task_struct *target, const struct user_regset *regset, | |
508 | unsigned int pos, unsigned int count, | |
509 | void *kbuf, void __user *ubuf) | |
510 | { | |
511 | struct user_fpsimd_state *uregs; | |
512 | uregs = &target->thread.fpsimd_state.user_fpsimd; | |
513 | return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0, -1); | |
514 | } | |
515 | ||
516 | static int fpr_set(struct task_struct *target, const struct user_regset *regset, | |
517 | unsigned int pos, unsigned int count, | |
518 | const void *kbuf, const void __user *ubuf) | |
519 | { | |
520 | int ret; | |
521 | struct user_fpsimd_state newstate; | |
522 | ||
523 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newstate, 0, -1); | |
524 | if (ret) | |
525 | return ret; | |
526 | ||
527 | target->thread.fpsimd_state.user_fpsimd = newstate; | |
005f78cd | 528 | fpsimd_flush_task_state(target); |
478fcb2c WD |
529 | return ret; |
530 | } | |
531 | ||
532 | static int tls_get(struct task_struct *target, const struct user_regset *regset, | |
533 | unsigned int pos, unsigned int count, | |
534 | void *kbuf, void __user *ubuf) | |
535 | { | |
536 | unsigned long *tls = &target->thread.tp_value; | |
537 | return user_regset_copyout(&pos, &count, &kbuf, &ubuf, tls, 0, -1); | |
538 | } | |
539 | ||
540 | static int tls_set(struct task_struct *target, const struct user_regset *regset, | |
541 | unsigned int pos, unsigned int count, | |
542 | const void *kbuf, const void __user *ubuf) | |
543 | { | |
544 | int ret; | |
545 | unsigned long tls; | |
546 | ||
547 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &tls, 0, -1); | |
548 | if (ret) | |
549 | return ret; | |
550 | ||
551 | target->thread.tp_value = tls; | |
552 | return ret; | |
553 | } | |
554 | ||
766a85d7 AT |
555 | static int system_call_get(struct task_struct *target, |
556 | const struct user_regset *regset, | |
557 | unsigned int pos, unsigned int count, | |
558 | void *kbuf, void __user *ubuf) | |
559 | { | |
560 | int syscallno = task_pt_regs(target)->syscallno; | |
561 | ||
562 | return user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
563 | &syscallno, 0, -1); | |
564 | } | |
565 | ||
566 | static int system_call_set(struct task_struct *target, | |
567 | const struct user_regset *regset, | |
568 | unsigned int pos, unsigned int count, | |
569 | const void *kbuf, const void __user *ubuf) | |
570 | { | |
571 | int syscallno, ret; | |
572 | ||
573 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &syscallno, 0, -1); | |
574 | if (ret) | |
575 | return ret; | |
576 | ||
577 | task_pt_regs(target)->syscallno = syscallno; | |
578 | return ret; | |
579 | } | |
580 | ||
478fcb2c WD |
581 | enum aarch64_regset { |
582 | REGSET_GPR, | |
583 | REGSET_FPR, | |
584 | REGSET_TLS, | |
585 | #ifdef CONFIG_HAVE_HW_BREAKPOINT | |
586 | REGSET_HW_BREAK, | |
587 | REGSET_HW_WATCH, | |
588 | #endif | |
766a85d7 | 589 | REGSET_SYSTEM_CALL, |
478fcb2c WD |
590 | }; |
591 | ||
592 | static const struct user_regset aarch64_regsets[] = { | |
593 | [REGSET_GPR] = { | |
594 | .core_note_type = NT_PRSTATUS, | |
595 | .n = sizeof(struct user_pt_regs) / sizeof(u64), | |
596 | .size = sizeof(u64), | |
597 | .align = sizeof(u64), | |
598 | .get = gpr_get, | |
599 | .set = gpr_set | |
600 | }, | |
601 | [REGSET_FPR] = { | |
602 | .core_note_type = NT_PRFPREG, | |
603 | .n = sizeof(struct user_fpsimd_state) / sizeof(u32), | |
604 | /* | |
605 | * We pretend we have 32-bit registers because the fpsr and | |
606 | * fpcr are 32-bits wide. | |
607 | */ | |
608 | .size = sizeof(u32), | |
609 | .align = sizeof(u32), | |
610 | .get = fpr_get, | |
611 | .set = fpr_set | |
612 | }, | |
613 | [REGSET_TLS] = { | |
614 | .core_note_type = NT_ARM_TLS, | |
615 | .n = 1, | |
616 | .size = sizeof(void *), | |
617 | .align = sizeof(void *), | |
618 | .get = tls_get, | |
619 | .set = tls_set, | |
620 | }, | |
621 | #ifdef CONFIG_HAVE_HW_BREAKPOINT | |
622 | [REGSET_HW_BREAK] = { | |
623 | .core_note_type = NT_ARM_HW_BREAK, | |
624 | .n = sizeof(struct user_hwdebug_state) / sizeof(u32), | |
625 | .size = sizeof(u32), | |
626 | .align = sizeof(u32), | |
627 | .get = hw_break_get, | |
628 | .set = hw_break_set, | |
629 | }, | |
630 | [REGSET_HW_WATCH] = { | |
631 | .core_note_type = NT_ARM_HW_WATCH, | |
632 | .n = sizeof(struct user_hwdebug_state) / sizeof(u32), | |
633 | .size = sizeof(u32), | |
634 | .align = sizeof(u32), | |
635 | .get = hw_break_get, | |
636 | .set = hw_break_set, | |
637 | }, | |
638 | #endif | |
766a85d7 AT |
639 | [REGSET_SYSTEM_CALL] = { |
640 | .core_note_type = NT_ARM_SYSTEM_CALL, | |
641 | .n = 1, | |
642 | .size = sizeof(int), | |
643 | .align = sizeof(int), | |
644 | .get = system_call_get, | |
645 | .set = system_call_set, | |
646 | }, | |
478fcb2c WD |
647 | }; |
648 | ||
649 | static const struct user_regset_view user_aarch64_view = { | |
650 | .name = "aarch64", .e_machine = EM_AARCH64, | |
651 | .regsets = aarch64_regsets, .n = ARRAY_SIZE(aarch64_regsets) | |
652 | }; | |
653 | ||
654 | #ifdef CONFIG_COMPAT | |
655 | #include <linux/compat.h> | |
656 | ||
657 | enum compat_regset { | |
658 | REGSET_COMPAT_GPR, | |
659 | REGSET_COMPAT_VFP, | |
660 | }; | |
661 | ||
662 | static int compat_gpr_get(struct task_struct *target, | |
663 | const struct user_regset *regset, | |
664 | unsigned int pos, unsigned int count, | |
665 | void *kbuf, void __user *ubuf) | |
666 | { | |
667 | int ret = 0; | |
668 | unsigned int i, start, num_regs; | |
669 | ||
670 | /* Calculate the number of AArch32 registers contained in count */ | |
671 | num_regs = count / regset->size; | |
672 | ||
673 | /* Convert pos into an register number */ | |
674 | start = pos / regset->size; | |
675 | ||
676 | if (start + num_regs > regset->n) | |
677 | return -EIO; | |
678 | ||
679 | for (i = 0; i < num_regs; ++i) { | |
680 | unsigned int idx = start + i; | |
6a2e5e52 | 681 | compat_ulong_t reg; |
478fcb2c WD |
682 | |
683 | switch (idx) { | |
684 | case 15: | |
6a2e5e52 | 685 | reg = task_pt_regs(target)->pc; |
478fcb2c WD |
686 | break; |
687 | case 16: | |
6a2e5e52 | 688 | reg = task_pt_regs(target)->pstate; |
478fcb2c WD |
689 | break; |
690 | case 17: | |
6a2e5e52 | 691 | reg = task_pt_regs(target)->orig_x0; |
478fcb2c WD |
692 | break; |
693 | default: | |
6a2e5e52 | 694 | reg = task_pt_regs(target)->regs[idx]; |
478fcb2c WD |
695 | } |
696 | ||
2227901a VK |
697 | if (kbuf) { |
698 | memcpy(kbuf, ®, sizeof(reg)); | |
699 | kbuf += sizeof(reg); | |
700 | } else { | |
701 | ret = copy_to_user(ubuf, ®, sizeof(reg)); | |
85487edd WD |
702 | if (ret) { |
703 | ret = -EFAULT; | |
2227901a | 704 | break; |
85487edd | 705 | } |
2227901a VK |
706 | |
707 | ubuf += sizeof(reg); | |
708 | } | |
478fcb2c WD |
709 | } |
710 | ||
711 | return ret; | |
712 | } | |
713 | ||
714 | static int compat_gpr_set(struct task_struct *target, | |
715 | const struct user_regset *regset, | |
716 | unsigned int pos, unsigned int count, | |
717 | const void *kbuf, const void __user *ubuf) | |
718 | { | |
719 | struct pt_regs newregs; | |
720 | int ret = 0; | |
721 | unsigned int i, start, num_regs; | |
722 | ||
723 | /* Calculate the number of AArch32 registers contained in count */ | |
724 | num_regs = count / regset->size; | |
725 | ||
726 | /* Convert pos into an register number */ | |
727 | start = pos / regset->size; | |
728 | ||
729 | if (start + num_regs > regset->n) | |
730 | return -EIO; | |
731 | ||
732 | newregs = *task_pt_regs(target); | |
733 | ||
734 | for (i = 0; i < num_regs; ++i) { | |
735 | unsigned int idx = start + i; | |
6a2e5e52 ML |
736 | compat_ulong_t reg; |
737 | ||
2227901a VK |
738 | if (kbuf) { |
739 | memcpy(®, kbuf, sizeof(reg)); | |
740 | kbuf += sizeof(reg); | |
741 | } else { | |
742 | ret = copy_from_user(®, ubuf, sizeof(reg)); | |
85487edd WD |
743 | if (ret) { |
744 | ret = -EFAULT; | |
745 | break; | |
746 | } | |
6a2e5e52 | 747 | |
2227901a VK |
748 | ubuf += sizeof(reg); |
749 | } | |
478fcb2c WD |
750 | |
751 | switch (idx) { | |
752 | case 15: | |
6a2e5e52 | 753 | newregs.pc = reg; |
478fcb2c WD |
754 | break; |
755 | case 16: | |
6a2e5e52 | 756 | newregs.pstate = reg; |
478fcb2c WD |
757 | break; |
758 | case 17: | |
6a2e5e52 | 759 | newregs.orig_x0 = reg; |
478fcb2c WD |
760 | break; |
761 | default: | |
6a2e5e52 | 762 | newregs.regs[idx] = reg; |
478fcb2c WD |
763 | } |
764 | ||
478fcb2c WD |
765 | } |
766 | ||
767 | if (valid_user_regs(&newregs.user_regs)) | |
768 | *task_pt_regs(target) = newregs; | |
769 | else | |
770 | ret = -EINVAL; | |
771 | ||
478fcb2c WD |
772 | return ret; |
773 | } | |
774 | ||
775 | static int compat_vfp_get(struct task_struct *target, | |
776 | const struct user_regset *regset, | |
777 | unsigned int pos, unsigned int count, | |
778 | void *kbuf, void __user *ubuf) | |
779 | { | |
780 | struct user_fpsimd_state *uregs; | |
781 | compat_ulong_t fpscr; | |
782 | int ret; | |
783 | ||
784 | uregs = &target->thread.fpsimd_state.user_fpsimd; | |
785 | ||
786 | /* | |
787 | * The VFP registers are packed into the fpsimd_state, so they all sit | |
788 | * nicely together for us. We just need to create the fpscr separately. | |
789 | */ | |
790 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0, | |
791 | VFP_STATE_SIZE - sizeof(compat_ulong_t)); | |
792 | ||
793 | if (count && !ret) { | |
794 | fpscr = (uregs->fpsr & VFP_FPSCR_STAT_MASK) | | |
795 | (uregs->fpcr & VFP_FPSCR_CTRL_MASK); | |
796 | ret = put_user(fpscr, (compat_ulong_t *)ubuf); | |
797 | } | |
798 | ||
799 | return ret; | |
800 | } | |
801 | ||
802 | static int compat_vfp_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 | struct user_fpsimd_state *uregs; | |
808 | compat_ulong_t fpscr; | |
809 | int ret; | |
810 | ||
811 | if (pos + count > VFP_STATE_SIZE) | |
812 | return -EIO; | |
813 | ||
814 | uregs = &target->thread.fpsimd_state.user_fpsimd; | |
815 | ||
816 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, uregs, 0, | |
817 | VFP_STATE_SIZE - sizeof(compat_ulong_t)); | |
818 | ||
819 | if (count && !ret) { | |
820 | ret = get_user(fpscr, (compat_ulong_t *)ubuf); | |
821 | uregs->fpsr = fpscr & VFP_FPSCR_STAT_MASK; | |
822 | uregs->fpcr = fpscr & VFP_FPSCR_CTRL_MASK; | |
823 | } | |
824 | ||
005f78cd | 825 | fpsimd_flush_task_state(target); |
478fcb2c WD |
826 | return ret; |
827 | } | |
828 | ||
829 | static const struct user_regset aarch32_regsets[] = { | |
830 | [REGSET_COMPAT_GPR] = { | |
831 | .core_note_type = NT_PRSTATUS, | |
832 | .n = COMPAT_ELF_NGREG, | |
833 | .size = sizeof(compat_elf_greg_t), | |
834 | .align = sizeof(compat_elf_greg_t), | |
835 | .get = compat_gpr_get, | |
836 | .set = compat_gpr_set | |
837 | }, | |
838 | [REGSET_COMPAT_VFP] = { | |
839 | .core_note_type = NT_ARM_VFP, | |
840 | .n = VFP_STATE_SIZE / sizeof(compat_ulong_t), | |
841 | .size = sizeof(compat_ulong_t), | |
842 | .align = sizeof(compat_ulong_t), | |
843 | .get = compat_vfp_get, | |
844 | .set = compat_vfp_set | |
845 | }, | |
846 | }; | |
847 | ||
848 | static const struct user_regset_view user_aarch32_view = { | |
849 | .name = "aarch32", .e_machine = EM_ARM, | |
850 | .regsets = aarch32_regsets, .n = ARRAY_SIZE(aarch32_regsets) | |
851 | }; | |
852 | ||
478fcb2c WD |
853 | static int compat_ptrace_read_user(struct task_struct *tsk, compat_ulong_t off, |
854 | compat_ulong_t __user *ret) | |
855 | { | |
856 | compat_ulong_t tmp; | |
857 | ||
858 | if (off & 3) | |
859 | return -EIO; | |
860 | ||
7606c37d | 861 | if (off == COMPAT_PT_TEXT_ADDR) |
478fcb2c | 862 | tmp = tsk->mm->start_code; |
7606c37d | 863 | else if (off == COMPAT_PT_DATA_ADDR) |
478fcb2c | 864 | tmp = tsk->mm->start_data; |
7606c37d | 865 | else if (off == COMPAT_PT_TEXT_END_ADDR) |
478fcb2c WD |
866 | tmp = tsk->mm->end_code; |
867 | else if (off < sizeof(compat_elf_gregset_t)) | |
868 | return copy_regset_to_user(tsk, &user_aarch32_view, | |
869 | REGSET_COMPAT_GPR, off, | |
870 | sizeof(compat_ulong_t), ret); | |
871 | else if (off >= COMPAT_USER_SZ) | |
872 | return -EIO; | |
873 | else | |
874 | tmp = 0; | |
875 | ||
876 | return put_user(tmp, ret); | |
877 | } | |
878 | ||
879 | static int compat_ptrace_write_user(struct task_struct *tsk, compat_ulong_t off, | |
880 | compat_ulong_t val) | |
881 | { | |
882 | int ret; | |
c1688707 | 883 | mm_segment_t old_fs = get_fs(); |
478fcb2c WD |
884 | |
885 | if (off & 3 || off >= COMPAT_USER_SZ) | |
886 | return -EIO; | |
887 | ||
888 | if (off >= sizeof(compat_elf_gregset_t)) | |
889 | return 0; | |
890 | ||
c1688707 | 891 | set_fs(KERNEL_DS); |
478fcb2c WD |
892 | ret = copy_regset_from_user(tsk, &user_aarch32_view, |
893 | REGSET_COMPAT_GPR, off, | |
894 | sizeof(compat_ulong_t), | |
895 | &val); | |
c1688707 WD |
896 | set_fs(old_fs); |
897 | ||
478fcb2c WD |
898 | return ret; |
899 | } | |
900 | ||
901 | #ifdef CONFIG_HAVE_HW_BREAKPOINT | |
902 | ||
903 | /* | |
904 | * Convert a virtual register number into an index for a thread_info | |
905 | * breakpoint array. Breakpoints are identified using positive numbers | |
906 | * whilst watchpoints are negative. The registers are laid out as pairs | |
907 | * of (address, control), each pair mapping to a unique hw_breakpoint struct. | |
908 | * Register 0 is reserved for describing resource information. | |
909 | */ | |
910 | static int compat_ptrace_hbp_num_to_idx(compat_long_t num) | |
911 | { | |
912 | return (abs(num) - 1) >> 1; | |
913 | } | |
914 | ||
915 | static int compat_ptrace_hbp_get_resource_info(u32 *kdata) | |
916 | { | |
917 | u8 num_brps, num_wrps, debug_arch, wp_len; | |
918 | u32 reg = 0; | |
919 | ||
920 | num_brps = hw_breakpoint_slots(TYPE_INST); | |
921 | num_wrps = hw_breakpoint_slots(TYPE_DATA); | |
922 | ||
923 | debug_arch = debug_monitors_arch(); | |
924 | wp_len = 8; | |
925 | reg |= debug_arch; | |
926 | reg <<= 8; | |
927 | reg |= wp_len; | |
928 | reg <<= 8; | |
929 | reg |= num_wrps; | |
930 | reg <<= 8; | |
931 | reg |= num_brps; | |
932 | ||
933 | *kdata = reg; | |
934 | return 0; | |
935 | } | |
936 | ||
937 | static int compat_ptrace_hbp_get(unsigned int note_type, | |
938 | struct task_struct *tsk, | |
939 | compat_long_t num, | |
940 | u32 *kdata) | |
941 | { | |
942 | u64 addr = 0; | |
943 | u32 ctrl = 0; | |
944 | ||
945 | int err, idx = compat_ptrace_hbp_num_to_idx(num);; | |
946 | ||
947 | if (num & 1) { | |
948 | err = ptrace_hbp_get_addr(note_type, tsk, idx, &addr); | |
949 | *kdata = (u32)addr; | |
950 | } else { | |
951 | err = ptrace_hbp_get_ctrl(note_type, tsk, idx, &ctrl); | |
952 | *kdata = ctrl; | |
953 | } | |
954 | ||
955 | return err; | |
956 | } | |
957 | ||
958 | static int compat_ptrace_hbp_set(unsigned int note_type, | |
959 | struct task_struct *tsk, | |
960 | compat_long_t num, | |
961 | u32 *kdata) | |
962 | { | |
963 | u64 addr; | |
964 | u32 ctrl; | |
965 | ||
966 | int err, idx = compat_ptrace_hbp_num_to_idx(num); | |
967 | ||
968 | if (num & 1) { | |
969 | addr = *kdata; | |
970 | err = ptrace_hbp_set_addr(note_type, tsk, idx, addr); | |
971 | } else { | |
972 | ctrl = *kdata; | |
973 | err = ptrace_hbp_set_ctrl(note_type, tsk, idx, ctrl); | |
974 | } | |
975 | ||
976 | return err; | |
977 | } | |
978 | ||
979 | static int compat_ptrace_gethbpregs(struct task_struct *tsk, compat_long_t num, | |
980 | compat_ulong_t __user *data) | |
981 | { | |
982 | int ret; | |
983 | u32 kdata; | |
984 | mm_segment_t old_fs = get_fs(); | |
985 | ||
986 | set_fs(KERNEL_DS); | |
987 | /* Watchpoint */ | |
988 | if (num < 0) { | |
989 | ret = compat_ptrace_hbp_get(NT_ARM_HW_WATCH, tsk, num, &kdata); | |
990 | /* Resource info */ | |
991 | } else if (num == 0) { | |
992 | ret = compat_ptrace_hbp_get_resource_info(&kdata); | |
993 | /* Breakpoint */ | |
994 | } else { | |
995 | ret = compat_ptrace_hbp_get(NT_ARM_HW_BREAK, tsk, num, &kdata); | |
996 | } | |
997 | set_fs(old_fs); | |
998 | ||
999 | if (!ret) | |
1000 | ret = put_user(kdata, data); | |
1001 | ||
1002 | return ret; | |
1003 | } | |
1004 | ||
1005 | static int compat_ptrace_sethbpregs(struct task_struct *tsk, compat_long_t num, | |
1006 | compat_ulong_t __user *data) | |
1007 | { | |
1008 | int ret; | |
1009 | u32 kdata = 0; | |
1010 | mm_segment_t old_fs = get_fs(); | |
1011 | ||
1012 | if (num == 0) | |
1013 | return 0; | |
1014 | ||
1015 | ret = get_user(kdata, data); | |
1016 | if (ret) | |
1017 | return ret; | |
1018 | ||
1019 | set_fs(KERNEL_DS); | |
1020 | if (num < 0) | |
1021 | ret = compat_ptrace_hbp_set(NT_ARM_HW_WATCH, tsk, num, &kdata); | |
1022 | else | |
1023 | ret = compat_ptrace_hbp_set(NT_ARM_HW_BREAK, tsk, num, &kdata); | |
1024 | set_fs(old_fs); | |
1025 | ||
1026 | return ret; | |
1027 | } | |
1028 | #endif /* CONFIG_HAVE_HW_BREAKPOINT */ | |
1029 | ||
1030 | long compat_arch_ptrace(struct task_struct *child, compat_long_t request, | |
1031 | compat_ulong_t caddr, compat_ulong_t cdata) | |
1032 | { | |
1033 | unsigned long addr = caddr; | |
1034 | unsigned long data = cdata; | |
1035 | void __user *datap = compat_ptr(data); | |
1036 | int ret; | |
1037 | ||
1038 | switch (request) { | |
1039 | case PTRACE_PEEKUSR: | |
1040 | ret = compat_ptrace_read_user(child, addr, datap); | |
1041 | break; | |
1042 | ||
1043 | case PTRACE_POKEUSR: | |
1044 | ret = compat_ptrace_write_user(child, addr, data); | |
1045 | break; | |
1046 | ||
27aa55c5 | 1047 | case COMPAT_PTRACE_GETREGS: |
478fcb2c WD |
1048 | ret = copy_regset_to_user(child, |
1049 | &user_aarch32_view, | |
1050 | REGSET_COMPAT_GPR, | |
1051 | 0, sizeof(compat_elf_gregset_t), | |
1052 | datap); | |
1053 | break; | |
1054 | ||
27aa55c5 | 1055 | case COMPAT_PTRACE_SETREGS: |
478fcb2c WD |
1056 | ret = copy_regset_from_user(child, |
1057 | &user_aarch32_view, | |
1058 | REGSET_COMPAT_GPR, | |
1059 | 0, sizeof(compat_elf_gregset_t), | |
1060 | datap); | |
1061 | break; | |
1062 | ||
27aa55c5 | 1063 | case COMPAT_PTRACE_GET_THREAD_AREA: |
478fcb2c WD |
1064 | ret = put_user((compat_ulong_t)child->thread.tp_value, |
1065 | (compat_ulong_t __user *)datap); | |
1066 | break; | |
1067 | ||
27aa55c5 | 1068 | case COMPAT_PTRACE_SET_SYSCALL: |
478fcb2c WD |
1069 | task_pt_regs(child)->syscallno = data; |
1070 | ret = 0; | |
1071 | break; | |
1072 | ||
1073 | case COMPAT_PTRACE_GETVFPREGS: | |
1074 | ret = copy_regset_to_user(child, | |
1075 | &user_aarch32_view, | |
1076 | REGSET_COMPAT_VFP, | |
1077 | 0, VFP_STATE_SIZE, | |
1078 | datap); | |
1079 | break; | |
1080 | ||
1081 | case COMPAT_PTRACE_SETVFPREGS: | |
1082 | ret = copy_regset_from_user(child, | |
1083 | &user_aarch32_view, | |
1084 | REGSET_COMPAT_VFP, | |
1085 | 0, VFP_STATE_SIZE, | |
1086 | datap); | |
1087 | break; | |
1088 | ||
1089 | #ifdef CONFIG_HAVE_HW_BREAKPOINT | |
27aa55c5 | 1090 | case COMPAT_PTRACE_GETHBPREGS: |
478fcb2c WD |
1091 | ret = compat_ptrace_gethbpregs(child, addr, datap); |
1092 | break; | |
1093 | ||
27aa55c5 | 1094 | case COMPAT_PTRACE_SETHBPREGS: |
478fcb2c WD |
1095 | ret = compat_ptrace_sethbpregs(child, addr, datap); |
1096 | break; | |
1097 | #endif | |
1098 | ||
1099 | default: | |
1100 | ret = compat_ptrace_request(child, request, addr, | |
1101 | data); | |
1102 | break; | |
1103 | } | |
1104 | ||
1105 | return ret; | |
1106 | } | |
1107 | #endif /* CONFIG_COMPAT */ | |
1108 | ||
1109 | const struct user_regset_view *task_user_regset_view(struct task_struct *task) | |
1110 | { | |
1111 | #ifdef CONFIG_COMPAT | |
1112 | if (is_compat_thread(task_thread_info(task))) | |
1113 | return &user_aarch32_view; | |
1114 | #endif | |
1115 | return &user_aarch64_view; | |
1116 | } | |
1117 | ||
1118 | long arch_ptrace(struct task_struct *child, long request, | |
1119 | unsigned long addr, unsigned long data) | |
1120 | { | |
1121 | return ptrace_request(child, request, addr, data); | |
1122 | } | |
1123 | ||
3157858f AT |
1124 | enum ptrace_syscall_dir { |
1125 | PTRACE_SYSCALL_ENTER = 0, | |
1126 | PTRACE_SYSCALL_EXIT, | |
1127 | }; | |
1128 | ||
1129 | static void tracehook_report_syscall(struct pt_regs *regs, | |
1130 | enum ptrace_syscall_dir dir) | |
478fcb2c | 1131 | { |
3157858f | 1132 | int regno; |
478fcb2c WD |
1133 | unsigned long saved_reg; |
1134 | ||
3157858f AT |
1135 | /* |
1136 | * A scratch register (ip(r12) on AArch32, x7 on AArch64) is | |
1137 | * used to denote syscall entry/exit: | |
1138 | */ | |
1139 | regno = (is_compat_task() ? 12 : 7); | |
1140 | saved_reg = regs->regs[regno]; | |
1141 | regs->regs[regno] = dir; | |
478fcb2c | 1142 | |
3157858f | 1143 | if (dir == PTRACE_SYSCALL_EXIT) |
478fcb2c WD |
1144 | tracehook_report_syscall_exit(regs, 0); |
1145 | else if (tracehook_report_syscall_entry(regs)) | |
1146 | regs->syscallno = ~0UL; | |
1147 | ||
3157858f AT |
1148 | regs->regs[regno] = saved_reg; |
1149 | } | |
1150 | ||
1151 | asmlinkage int syscall_trace_enter(struct pt_regs *regs) | |
1152 | { | |
a1ae65b2 AT |
1153 | /* Do the secure computing check first; failures should be fast. */ |
1154 | if (secure_computing() == -1) | |
1155 | return -1; | |
1156 | ||
3157858f AT |
1157 | if (test_thread_flag(TIF_SYSCALL_TRACE)) |
1158 | tracehook_report_syscall(regs, PTRACE_SYSCALL_ENTER); | |
478fcb2c | 1159 | |
055b1212 AT |
1160 | if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) |
1161 | trace_sys_enter(regs, regs->syscallno); | |
1162 | ||
4913c598 EP |
1163 | audit_syscall_entry(regs->syscallno, regs->orig_x0, regs->regs[1], |
1164 | regs->regs[2], regs->regs[3]); | |
5701ede8 | 1165 | |
478fcb2c WD |
1166 | return regs->syscallno; |
1167 | } | |
3157858f AT |
1168 | |
1169 | asmlinkage void syscall_trace_exit(struct pt_regs *regs) | |
1170 | { | |
5701ede8 AT |
1171 | audit_syscall_exit(regs); |
1172 | ||
055b1212 AT |
1173 | if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) |
1174 | trace_sys_exit(regs, regs_return_value(regs)); | |
1175 | ||
3157858f AT |
1176 | if (test_thread_flag(TIF_SYSCALL_TRACE)) |
1177 | tracehook_report_syscall(regs, PTRACE_SYSCALL_EXIT); | |
1178 | } |