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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * PowerPC version |
3 | * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) | |
4 | * | |
5 | * Derived from "arch/m68k/kernel/ptrace.c" | |
6 | * Copyright (C) 1994 by Hamish Macdonald | |
7 | * Taken from linux/kernel/ptrace.c and modified for M680x0. | |
8 | * linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds | |
9 | * | |
10 | * Modified by Cort Dougan (cort@hq.fsmlabs.com) | |
b123923d | 11 | * and Paul Mackerras (paulus@samba.org). |
1da177e4 LT |
12 | * |
13 | * This file is subject to the terms and conditions of the GNU General | |
14 | * Public License. See the file README.legal in the main directory of | |
15 | * this archive for more details. | |
16 | */ | |
17 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/mm.h> | |
21 | #include <linux/smp.h> | |
1da177e4 LT |
22 | #include <linux/errno.h> |
23 | #include <linux/ptrace.h> | |
f65255e8 | 24 | #include <linux/regset.h> |
3caf06c6 | 25 | #include <linux/elf.h> |
1da177e4 LT |
26 | #include <linux/user.h> |
27 | #include <linux/security.h> | |
7ed20e1a | 28 | #include <linux/signal.h> |
ea9c102c DW |
29 | #include <linux/seccomp.h> |
30 | #include <linux/audit.h> | |
e8a30302 | 31 | #ifdef CONFIG_PPC32 |
ea9c102c | 32 | #include <linux/module.h> |
e8a30302 | 33 | #endif |
1da177e4 LT |
34 | |
35 | #include <asm/uaccess.h> | |
36 | #include <asm/page.h> | |
37 | #include <asm/pgtable.h> | |
38 | #include <asm/system.h> | |
21a62902 | 39 | |
abd06505 BH |
40 | /* |
41 | * does not yet catch signals sent when the child dies. | |
42 | * in exit.c or in signal.c. | |
43 | */ | |
44 | ||
45 | /* | |
46 | * Set of msr bits that gdb can change on behalf of a process. | |
47 | */ | |
48 | #if defined(CONFIG_40x) || defined(CONFIG_BOOKE) | |
49 | #define MSR_DEBUGCHANGE 0 | |
1da177e4 | 50 | #else |
abd06505 | 51 | #define MSR_DEBUGCHANGE (MSR_SE | MSR_BE) |
1da177e4 | 52 | #endif |
acd89828 | 53 | |
1da177e4 | 54 | /* |
abd06505 | 55 | * Max register writeable via put_reg |
1da177e4 | 56 | */ |
abd06505 BH |
57 | #ifdef CONFIG_PPC32 |
58 | #define PT_MAX_PUT_REG PT_MQ | |
59 | #else | |
60 | #define PT_MAX_PUT_REG PT_CCR | |
61 | #endif | |
1da177e4 | 62 | |
26f77130 RM |
63 | static unsigned long get_user_msr(struct task_struct *task) |
64 | { | |
65 | return task->thread.regs->msr | task->thread.fpexc_mode; | |
66 | } | |
67 | ||
68 | static int set_user_msr(struct task_struct *task, unsigned long msr) | |
69 | { | |
70 | task->thread.regs->msr &= ~MSR_DEBUGCHANGE; | |
71 | task->thread.regs->msr |= msr & MSR_DEBUGCHANGE; | |
72 | return 0; | |
73 | } | |
74 | ||
75 | /* | |
76 | * We prevent mucking around with the reserved area of trap | |
77 | * which are used internally by the kernel. | |
78 | */ | |
79 | static int set_user_trap(struct task_struct *task, unsigned long trap) | |
80 | { | |
81 | task->thread.regs->trap = trap & 0xfff0; | |
82 | return 0; | |
83 | } | |
84 | ||
865418d8 BH |
85 | /* |
86 | * Get contents of register REGNO in task TASK. | |
87 | */ | |
88 | unsigned long ptrace_get_reg(struct task_struct *task, int regno) | |
89 | { | |
865418d8 BH |
90 | if (task->thread.regs == NULL) |
91 | return -EIO; | |
92 | ||
26f77130 RM |
93 | if (regno == PT_MSR) |
94 | return get_user_msr(task); | |
865418d8 BH |
95 | |
96 | if (regno < (sizeof(struct pt_regs) / sizeof(unsigned long))) | |
97 | return ((unsigned long *)task->thread.regs)[regno]; | |
98 | ||
99 | return -EIO; | |
100 | } | |
101 | ||
102 | /* | |
103 | * Write contents of register REGNO in task TASK. | |
104 | */ | |
105 | int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data) | |
106 | { | |
107 | if (task->thread.regs == NULL) | |
108 | return -EIO; | |
109 | ||
26f77130 RM |
110 | if (regno == PT_MSR) |
111 | return set_user_msr(task, data); | |
112 | if (regno == PT_TRAP) | |
113 | return set_user_trap(task, data); | |
114 | ||
115 | if (regno <= PT_MAX_PUT_REG) { | |
865418d8 BH |
116 | ((unsigned long *)task->thread.regs)[regno] = data; |
117 | return 0; | |
118 | } | |
119 | return -EIO; | |
120 | } | |
121 | ||
44dd3f50 RM |
122 | static int gpr_get(struct task_struct *target, const struct user_regset *regset, |
123 | unsigned int pos, unsigned int count, | |
124 | void *kbuf, void __user *ubuf) | |
125 | { | |
126 | int ret; | |
127 | ||
128 | if (target->thread.regs == NULL) | |
129 | return -EIO; | |
130 | ||
131 | CHECK_FULL_REGS(target->thread.regs); | |
132 | ||
133 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
134 | target->thread.regs, | |
135 | 0, offsetof(struct pt_regs, msr)); | |
136 | if (!ret) { | |
137 | unsigned long msr = get_user_msr(target); | |
138 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr, | |
139 | offsetof(struct pt_regs, msr), | |
140 | offsetof(struct pt_regs, msr) + | |
141 | sizeof(msr)); | |
142 | } | |
143 | ||
144 | BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) != | |
145 | offsetof(struct pt_regs, msr) + sizeof(long)); | |
146 | ||
147 | if (!ret) | |
148 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
149 | &target->thread.regs->orig_gpr3, | |
150 | offsetof(struct pt_regs, orig_gpr3), | |
151 | sizeof(struct pt_regs)); | |
152 | if (!ret) | |
153 | ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
154 | sizeof(struct pt_regs), -1); | |
155 | ||
156 | return ret; | |
157 | } | |
158 | ||
159 | static int gpr_set(struct task_struct *target, const struct user_regset *regset, | |
160 | unsigned int pos, unsigned int count, | |
161 | const void *kbuf, const void __user *ubuf) | |
162 | { | |
163 | unsigned long reg; | |
164 | int ret; | |
165 | ||
166 | if (target->thread.regs == NULL) | |
167 | return -EIO; | |
168 | ||
169 | CHECK_FULL_REGS(target->thread.regs); | |
170 | ||
171 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
172 | target->thread.regs, | |
173 | 0, PT_MSR * sizeof(reg)); | |
174 | ||
175 | if (!ret && count > 0) { | |
176 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®, | |
177 | PT_MSR * sizeof(reg), | |
178 | (PT_MSR + 1) * sizeof(reg)); | |
179 | if (!ret) | |
180 | ret = set_user_msr(target, reg); | |
181 | } | |
182 | ||
183 | BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) != | |
184 | offsetof(struct pt_regs, msr) + sizeof(long)); | |
185 | ||
186 | if (!ret) | |
187 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
188 | &target->thread.regs->orig_gpr3, | |
189 | PT_ORIG_R3 * sizeof(reg), | |
190 | (PT_MAX_PUT_REG + 1) * sizeof(reg)); | |
191 | ||
192 | if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret) | |
193 | ret = user_regset_copyin_ignore( | |
194 | &pos, &count, &kbuf, &ubuf, | |
195 | (PT_MAX_PUT_REG + 1) * sizeof(reg), | |
196 | PT_TRAP * sizeof(reg)); | |
197 | ||
198 | if (!ret && count > 0) { | |
199 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®, | |
200 | PT_TRAP * sizeof(reg), | |
201 | (PT_TRAP + 1) * sizeof(reg)); | |
202 | if (!ret) | |
203 | ret = set_user_trap(target, reg); | |
204 | } | |
205 | ||
206 | if (!ret) | |
207 | ret = user_regset_copyin_ignore( | |
208 | &pos, &count, &kbuf, &ubuf, | |
209 | (PT_TRAP + 1) * sizeof(reg), -1); | |
210 | ||
211 | return ret; | |
212 | } | |
865418d8 | 213 | |
f65255e8 RM |
214 | static int fpr_get(struct task_struct *target, const struct user_regset *regset, |
215 | unsigned int pos, unsigned int count, | |
216 | void *kbuf, void __user *ubuf) | |
217 | { | |
c6e6771b MN |
218 | #ifdef CONFIG_VSX |
219 | double buf[33]; | |
220 | int i; | |
221 | #endif | |
f65255e8 RM |
222 | flush_fp_to_thread(target); |
223 | ||
c6e6771b MN |
224 | #ifdef CONFIG_VSX |
225 | /* copy to local buffer then write that out */ | |
226 | for (i = 0; i < 32 ; i++) | |
227 | buf[i] = target->thread.TS_FPR(i); | |
228 | memcpy(&buf[32], &target->thread.fpscr, sizeof(double)); | |
229 | return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1); | |
230 | ||
231 | #else | |
f65255e8 | 232 | BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) != |
9c75a31c | 233 | offsetof(struct thread_struct, TS_FPR(32))); |
f65255e8 RM |
234 | |
235 | return user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
236 | &target->thread.fpr, 0, -1); | |
c6e6771b | 237 | #endif |
f65255e8 RM |
238 | } |
239 | ||
240 | static int fpr_set(struct task_struct *target, const struct user_regset *regset, | |
241 | unsigned int pos, unsigned int count, | |
242 | const void *kbuf, const void __user *ubuf) | |
243 | { | |
c6e6771b MN |
244 | #ifdef CONFIG_VSX |
245 | double buf[33]; | |
246 | int i; | |
247 | #endif | |
f65255e8 RM |
248 | flush_fp_to_thread(target); |
249 | ||
c6e6771b MN |
250 | #ifdef CONFIG_VSX |
251 | /* copy to local buffer then write that out */ | |
252 | i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1); | |
253 | if (i) | |
254 | return i; | |
255 | for (i = 0; i < 32 ; i++) | |
256 | target->thread.TS_FPR(i) = buf[i]; | |
257 | memcpy(&target->thread.fpscr, &buf[32], sizeof(double)); | |
258 | return 0; | |
259 | #else | |
f65255e8 | 260 | BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) != |
9c75a31c | 261 | offsetof(struct thread_struct, TS_FPR(32))); |
f65255e8 RM |
262 | |
263 | return user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
264 | &target->thread.fpr, 0, -1); | |
c6e6771b | 265 | #endif |
f65255e8 RM |
266 | } |
267 | ||
865418d8 BH |
268 | #ifdef CONFIG_ALTIVEC |
269 | /* | |
270 | * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go. | |
271 | * The transfer totals 34 quadword. Quadwords 0-31 contain the | |
272 | * corresponding vector registers. Quadword 32 contains the vscr as the | |
273 | * last word (offset 12) within that quadword. Quadword 33 contains the | |
274 | * vrsave as the first word (offset 0) within the quadword. | |
275 | * | |
276 | * This definition of the VMX state is compatible with the current PPC32 | |
277 | * ptrace interface. This allows signal handling and ptrace to use the | |
278 | * same structures. This also simplifies the implementation of a bi-arch | |
279 | * (combined (32- and 64-bit) gdb. | |
280 | */ | |
281 | ||
3caf06c6 RM |
282 | static int vr_active(struct task_struct *target, |
283 | const struct user_regset *regset) | |
284 | { | |
285 | flush_altivec_to_thread(target); | |
286 | return target->thread.used_vr ? regset->n : 0; | |
287 | } | |
288 | ||
289 | static int vr_get(struct task_struct *target, const struct user_regset *regset, | |
290 | unsigned int pos, unsigned int count, | |
291 | void *kbuf, void __user *ubuf) | |
292 | { | |
293 | int ret; | |
294 | ||
295 | flush_altivec_to_thread(target); | |
296 | ||
297 | BUILD_BUG_ON(offsetof(struct thread_struct, vscr) != | |
298 | offsetof(struct thread_struct, vr[32])); | |
299 | ||
300 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
301 | &target->thread.vr, 0, | |
302 | 33 * sizeof(vector128)); | |
303 | if (!ret) { | |
304 | /* | |
305 | * Copy out only the low-order word of vrsave. | |
306 | */ | |
307 | union { | |
308 | elf_vrreg_t reg; | |
309 | u32 word; | |
310 | } vrsave; | |
311 | memset(&vrsave, 0, sizeof(vrsave)); | |
312 | vrsave.word = target->thread.vrsave; | |
313 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave, | |
314 | 33 * sizeof(vector128), -1); | |
315 | } | |
316 | ||
317 | return ret; | |
318 | } | |
319 | ||
320 | static int vr_set(struct task_struct *target, const struct user_regset *regset, | |
321 | unsigned int pos, unsigned int count, | |
322 | const void *kbuf, const void __user *ubuf) | |
323 | { | |
324 | int ret; | |
325 | ||
326 | flush_altivec_to_thread(target); | |
327 | ||
328 | BUILD_BUG_ON(offsetof(struct thread_struct, vscr) != | |
329 | offsetof(struct thread_struct, vr[32])); | |
330 | ||
331 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
332 | &target->thread.vr, 0, 33 * sizeof(vector128)); | |
333 | if (!ret && count > 0) { | |
334 | /* | |
335 | * We use only the first word of vrsave. | |
336 | */ | |
337 | union { | |
338 | elf_vrreg_t reg; | |
339 | u32 word; | |
340 | } vrsave; | |
341 | memset(&vrsave, 0, sizeof(vrsave)); | |
342 | vrsave.word = target->thread.vrsave; | |
343 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave, | |
344 | 33 * sizeof(vector128), -1); | |
345 | if (!ret) | |
346 | target->thread.vrsave = vrsave.word; | |
347 | } | |
348 | ||
349 | return ret; | |
350 | } | |
865418d8 BH |
351 | #endif /* CONFIG_ALTIVEC */ |
352 | ||
ce48b210 MN |
353 | #ifdef CONFIG_VSX |
354 | /* | |
355 | * Currently to set and and get all the vsx state, you need to call | |
356 | * the fp and VMX calls aswell. This only get/sets the lower 32 | |
357 | * 128bit VSX registers. | |
358 | */ | |
359 | ||
360 | static int vsr_active(struct task_struct *target, | |
361 | const struct user_regset *regset) | |
362 | { | |
363 | flush_vsx_to_thread(target); | |
364 | return target->thread.used_vsr ? regset->n : 0; | |
365 | } | |
366 | ||
367 | static int vsr_get(struct task_struct *target, const struct user_regset *regset, | |
368 | unsigned int pos, unsigned int count, | |
369 | void *kbuf, void __user *ubuf) | |
370 | { | |
371 | int ret; | |
372 | ||
373 | flush_vsx_to_thread(target); | |
374 | ||
375 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
376 | target->thread.fpr, 0, | |
377 | 32 * sizeof(vector128)); | |
378 | ||
379 | return ret; | |
380 | } | |
381 | ||
382 | static int vsr_set(struct task_struct *target, const struct user_regset *regset, | |
383 | unsigned int pos, unsigned int count, | |
384 | const void *kbuf, const void __user *ubuf) | |
385 | { | |
386 | int ret; | |
387 | ||
388 | flush_vsx_to_thread(target); | |
389 | ||
390 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
391 | target->thread.fpr, 0, | |
392 | 32 * sizeof(vector128)); | |
393 | ||
394 | return ret; | |
395 | } | |
396 | #endif /* CONFIG_VSX */ | |
397 | ||
865418d8 BH |
398 | #ifdef CONFIG_SPE |
399 | ||
400 | /* | |
401 | * For get_evrregs/set_evrregs functions 'data' has the following layout: | |
402 | * | |
403 | * struct { | |
404 | * u32 evr[32]; | |
405 | * u64 acc; | |
406 | * u32 spefscr; | |
407 | * } | |
408 | */ | |
409 | ||
a4e4b175 RM |
410 | static int evr_active(struct task_struct *target, |
411 | const struct user_regset *regset) | |
865418d8 | 412 | { |
a4e4b175 RM |
413 | flush_spe_to_thread(target); |
414 | return target->thread.used_spe ? regset->n : 0; | |
415 | } | |
865418d8 | 416 | |
a4e4b175 RM |
417 | static int evr_get(struct task_struct *target, const struct user_regset *regset, |
418 | unsigned int pos, unsigned int count, | |
419 | void *kbuf, void __user *ubuf) | |
420 | { | |
421 | int ret; | |
865418d8 | 422 | |
a4e4b175 | 423 | flush_spe_to_thread(target); |
865418d8 | 424 | |
a4e4b175 RM |
425 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, |
426 | &target->thread.evr, | |
427 | 0, sizeof(target->thread.evr)); | |
865418d8 | 428 | |
a4e4b175 RM |
429 | BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) != |
430 | offsetof(struct thread_struct, spefscr)); | |
431 | ||
432 | if (!ret) | |
433 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
434 | &target->thread.acc, | |
435 | sizeof(target->thread.evr), -1); | |
436 | ||
437 | return ret; | |
438 | } | |
439 | ||
440 | static int evr_set(struct task_struct *target, const struct user_regset *regset, | |
441 | unsigned int pos, unsigned int count, | |
442 | const void *kbuf, const void __user *ubuf) | |
443 | { | |
444 | int ret; | |
445 | ||
446 | flush_spe_to_thread(target); | |
447 | ||
448 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
449 | &target->thread.evr, | |
450 | 0, sizeof(target->thread.evr)); | |
865418d8 | 451 | |
a4e4b175 RM |
452 | BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) != |
453 | offsetof(struct thread_struct, spefscr)); | |
454 | ||
455 | if (!ret) | |
456 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
457 | &target->thread.acc, | |
458 | sizeof(target->thread.evr), -1); | |
459 | ||
460 | return ret; | |
865418d8 | 461 | } |
865418d8 BH |
462 | #endif /* CONFIG_SPE */ |
463 | ||
464 | ||
80fdf470 RM |
465 | /* |
466 | * These are our native regset flavors. | |
467 | */ | |
468 | enum powerpc_regset { | |
469 | REGSET_GPR, | |
470 | REGSET_FPR, | |
471 | #ifdef CONFIG_ALTIVEC | |
472 | REGSET_VMX, | |
473 | #endif | |
ce48b210 MN |
474 | #ifdef CONFIG_VSX |
475 | REGSET_VSX, | |
476 | #endif | |
80fdf470 RM |
477 | #ifdef CONFIG_SPE |
478 | REGSET_SPE, | |
479 | #endif | |
480 | }; | |
481 | ||
482 | static const struct user_regset native_regsets[] = { | |
483 | [REGSET_GPR] = { | |
484 | .core_note_type = NT_PRSTATUS, .n = ELF_NGREG, | |
485 | .size = sizeof(long), .align = sizeof(long), | |
486 | .get = gpr_get, .set = gpr_set | |
487 | }, | |
488 | [REGSET_FPR] = { | |
489 | .core_note_type = NT_PRFPREG, .n = ELF_NFPREG, | |
490 | .size = sizeof(double), .align = sizeof(double), | |
491 | .get = fpr_get, .set = fpr_set | |
492 | }, | |
493 | #ifdef CONFIG_ALTIVEC | |
494 | [REGSET_VMX] = { | |
495 | .core_note_type = NT_PPC_VMX, .n = 34, | |
496 | .size = sizeof(vector128), .align = sizeof(vector128), | |
497 | .active = vr_active, .get = vr_get, .set = vr_set | |
498 | }, | |
499 | #endif | |
ce48b210 MN |
500 | #ifdef CONFIG_VSX |
501 | [REGSET_VSX] = { | |
502 | .n = 32, | |
503 | .size = sizeof(vector128), .align = sizeof(vector128), | |
504 | .active = vsr_active, .get = vsr_get, .set = vsr_set | |
505 | }, | |
506 | #endif | |
80fdf470 RM |
507 | #ifdef CONFIG_SPE |
508 | [REGSET_SPE] = { | |
509 | .n = 35, | |
510 | .size = sizeof(u32), .align = sizeof(u32), | |
511 | .active = evr_active, .get = evr_get, .set = evr_set | |
512 | }, | |
513 | #endif | |
514 | }; | |
515 | ||
516 | static const struct user_regset_view user_ppc_native_view = { | |
517 | .name = UTS_MACHINE, .e_machine = ELF_ARCH, .ei_osabi = ELF_OSABI, | |
518 | .regsets = native_regsets, .n = ARRAY_SIZE(native_regsets) | |
519 | }; | |
520 | ||
fa8f5cb0 RM |
521 | #ifdef CONFIG_PPC64 |
522 | #include <linux/compat.h> | |
523 | ||
524 | static int gpr32_get(struct task_struct *target, | |
525 | const struct user_regset *regset, | |
526 | unsigned int pos, unsigned int count, | |
527 | void *kbuf, void __user *ubuf) | |
528 | { | |
529 | const unsigned long *regs = &target->thread.regs->gpr[0]; | |
530 | compat_ulong_t *k = kbuf; | |
531 | compat_ulong_t __user *u = ubuf; | |
532 | compat_ulong_t reg; | |
533 | ||
534 | if (target->thread.regs == NULL) | |
535 | return -EIO; | |
536 | ||
537 | CHECK_FULL_REGS(target->thread.regs); | |
538 | ||
539 | pos /= sizeof(reg); | |
540 | count /= sizeof(reg); | |
541 | ||
542 | if (kbuf) | |
543 | for (; count > 0 && pos < PT_MSR; --count) | |
544 | *k++ = regs[pos++]; | |
545 | else | |
546 | for (; count > 0 && pos < PT_MSR; --count) | |
547 | if (__put_user((compat_ulong_t) regs[pos++], u++)) | |
548 | return -EFAULT; | |
549 | ||
550 | if (count > 0 && pos == PT_MSR) { | |
551 | reg = get_user_msr(target); | |
552 | if (kbuf) | |
553 | *k++ = reg; | |
554 | else if (__put_user(reg, u++)) | |
555 | return -EFAULT; | |
556 | ++pos; | |
557 | --count; | |
558 | } | |
559 | ||
560 | if (kbuf) | |
561 | for (; count > 0 && pos < PT_REGS_COUNT; --count) | |
562 | *k++ = regs[pos++]; | |
563 | else | |
564 | for (; count > 0 && pos < PT_REGS_COUNT; --count) | |
565 | if (__put_user((compat_ulong_t) regs[pos++], u++)) | |
566 | return -EFAULT; | |
567 | ||
568 | kbuf = k; | |
569 | ubuf = u; | |
570 | pos *= sizeof(reg); | |
571 | count *= sizeof(reg); | |
572 | return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
573 | PT_REGS_COUNT * sizeof(reg), -1); | |
574 | } | |
575 | ||
576 | static int gpr32_set(struct task_struct *target, | |
577 | const struct user_regset *regset, | |
578 | unsigned int pos, unsigned int count, | |
579 | const void *kbuf, const void __user *ubuf) | |
580 | { | |
581 | unsigned long *regs = &target->thread.regs->gpr[0]; | |
582 | const compat_ulong_t *k = kbuf; | |
583 | const compat_ulong_t __user *u = ubuf; | |
584 | compat_ulong_t reg; | |
585 | ||
586 | if (target->thread.regs == NULL) | |
587 | return -EIO; | |
588 | ||
589 | CHECK_FULL_REGS(target->thread.regs); | |
590 | ||
591 | pos /= sizeof(reg); | |
592 | count /= sizeof(reg); | |
593 | ||
594 | if (kbuf) | |
595 | for (; count > 0 && pos < PT_MSR; --count) | |
596 | regs[pos++] = *k++; | |
597 | else | |
598 | for (; count > 0 && pos < PT_MSR; --count) { | |
599 | if (__get_user(reg, u++)) | |
600 | return -EFAULT; | |
601 | regs[pos++] = reg; | |
602 | } | |
603 | ||
604 | ||
605 | if (count > 0 && pos == PT_MSR) { | |
606 | if (kbuf) | |
607 | reg = *k++; | |
608 | else if (__get_user(reg, u++)) | |
609 | return -EFAULT; | |
610 | set_user_msr(target, reg); | |
611 | ++pos; | |
612 | --count; | |
613 | } | |
614 | ||
c2372eb9 | 615 | if (kbuf) { |
fa8f5cb0 RM |
616 | for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) |
617 | regs[pos++] = *k++; | |
c2372eb9 RM |
618 | for (; count > 0 && pos < PT_TRAP; --count, ++pos) |
619 | ++k; | |
620 | } else { | |
fa8f5cb0 RM |
621 | for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) { |
622 | if (__get_user(reg, u++)) | |
623 | return -EFAULT; | |
624 | regs[pos++] = reg; | |
625 | } | |
c2372eb9 RM |
626 | for (; count > 0 && pos < PT_TRAP; --count, ++pos) |
627 | if (__get_user(reg, u++)) | |
628 | return -EFAULT; | |
629 | } | |
fa8f5cb0 RM |
630 | |
631 | if (count > 0 && pos == PT_TRAP) { | |
632 | if (kbuf) | |
633 | reg = *k++; | |
634 | else if (__get_user(reg, u++)) | |
635 | return -EFAULT; | |
636 | set_user_trap(target, reg); | |
637 | ++pos; | |
638 | --count; | |
639 | } | |
640 | ||
641 | kbuf = k; | |
642 | ubuf = u; | |
643 | pos *= sizeof(reg); | |
644 | count *= sizeof(reg); | |
645 | return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
646 | (PT_TRAP + 1) * sizeof(reg), -1); | |
647 | } | |
648 | ||
649 | /* | |
650 | * These are the regset flavors matching the CONFIG_PPC32 native set. | |
651 | */ | |
652 | static const struct user_regset compat_regsets[] = { | |
653 | [REGSET_GPR] = { | |
654 | .core_note_type = NT_PRSTATUS, .n = ELF_NGREG, | |
655 | .size = sizeof(compat_long_t), .align = sizeof(compat_long_t), | |
656 | .get = gpr32_get, .set = gpr32_set | |
657 | }, | |
658 | [REGSET_FPR] = { | |
659 | .core_note_type = NT_PRFPREG, .n = ELF_NFPREG, | |
660 | .size = sizeof(double), .align = sizeof(double), | |
661 | .get = fpr_get, .set = fpr_set | |
662 | }, | |
663 | #ifdef CONFIG_ALTIVEC | |
664 | [REGSET_VMX] = { | |
665 | .core_note_type = NT_PPC_VMX, .n = 34, | |
666 | .size = sizeof(vector128), .align = sizeof(vector128), | |
667 | .active = vr_active, .get = vr_get, .set = vr_set | |
668 | }, | |
669 | #endif | |
670 | #ifdef CONFIG_SPE | |
671 | [REGSET_SPE] = { | |
24f1a849 | 672 | .core_note_type = NT_PPC_SPE, .n = 35, |
fa8f5cb0 RM |
673 | .size = sizeof(u32), .align = sizeof(u32), |
674 | .active = evr_active, .get = evr_get, .set = evr_set | |
675 | }, | |
676 | #endif | |
677 | }; | |
678 | ||
679 | static const struct user_regset_view user_ppc_compat_view = { | |
680 | .name = "ppc", .e_machine = EM_PPC, .ei_osabi = ELF_OSABI, | |
681 | .regsets = compat_regsets, .n = ARRAY_SIZE(compat_regsets) | |
682 | }; | |
683 | #endif /* CONFIG_PPC64 */ | |
684 | ||
80fdf470 RM |
685 | const struct user_regset_view *task_user_regset_view(struct task_struct *task) |
686 | { | |
fa8f5cb0 RM |
687 | #ifdef CONFIG_PPC64 |
688 | if (test_tsk_thread_flag(task, TIF_32BIT)) | |
689 | return &user_ppc_compat_view; | |
690 | #endif | |
80fdf470 RM |
691 | return &user_ppc_native_view; |
692 | } | |
693 | ||
694 | ||
2a84b0d7 | 695 | void user_enable_single_step(struct task_struct *task) |
865418d8 BH |
696 | { |
697 | struct pt_regs *regs = task->thread.regs; | |
698 | ||
699 | if (regs != NULL) { | |
700 | #if defined(CONFIG_40x) || defined(CONFIG_BOOKE) | |
701 | task->thread.dbcr0 = DBCR0_IDM | DBCR0_IC; | |
702 | regs->msr |= MSR_DE; | |
703 | #else | |
704 | regs->msr |= MSR_SE; | |
705 | #endif | |
706 | } | |
707 | set_tsk_thread_flag(task, TIF_SINGLESTEP); | |
708 | } | |
709 | ||
2a84b0d7 | 710 | void user_disable_single_step(struct task_struct *task) |
865418d8 BH |
711 | { |
712 | struct pt_regs *regs = task->thread.regs; | |
713 | ||
714 | if (regs != NULL) { | |
715 | #if defined(CONFIG_40x) || defined(CONFIG_BOOKE) | |
716 | task->thread.dbcr0 = 0; | |
717 | regs->msr &= ~MSR_DE; | |
718 | #else | |
719 | regs->msr &= ~MSR_SE; | |
720 | #endif | |
721 | } | |
722 | clear_tsk_thread_flag(task, TIF_SINGLESTEP); | |
723 | } | |
724 | ||
abd06505 BH |
725 | static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr, |
726 | unsigned long data) | |
727 | { | |
728 | /* We only support one DABR and no IABRS at the moment */ | |
729 | if (addr > 0) | |
730 | return -EINVAL; | |
731 | ||
732 | /* The bottom 3 bits are flags */ | |
733 | if ((data & ~0x7UL) >= TASK_SIZE) | |
734 | return -EIO; | |
735 | ||
736 | /* Ensure translation is on */ | |
737 | if (data && !(data & DABR_TRANSLATION)) | |
738 | return -EIO; | |
739 | ||
740 | task->thread.dabr = data; | |
741 | return 0; | |
742 | } | |
abd06505 | 743 | |
1da177e4 LT |
744 | /* |
745 | * Called by kernel/ptrace.c when detaching.. | |
746 | * | |
747 | * Make sure single step bits etc are not set. | |
748 | */ | |
749 | void ptrace_disable(struct task_struct *child) | |
750 | { | |
751 | /* make sure the single step bit is not set. */ | |
2a84b0d7 | 752 | user_disable_single_step(child); |
1da177e4 LT |
753 | } |
754 | ||
e17666ba BH |
755 | /* |
756 | * Here are the old "legacy" powerpc specific getregs/setregs ptrace calls, | |
757 | * we mark them as obsolete now, they will be removed in a future version | |
758 | */ | |
759 | static long arch_ptrace_old(struct task_struct *child, long request, long addr, | |
760 | long data) | |
761 | { | |
c391cd00 RM |
762 | switch (request) { |
763 | case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */ | |
764 | return copy_regset_to_user(child, &user_ppc_native_view, | |
765 | REGSET_GPR, 0, 32 * sizeof(long), | |
766 | (void __user *) data); | |
767 | ||
768 | case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */ | |
769 | return copy_regset_from_user(child, &user_ppc_native_view, | |
770 | REGSET_GPR, 0, 32 * sizeof(long), | |
771 | (const void __user *) data); | |
772 | ||
773 | case PPC_PTRACE_GETFPREGS: /* Get FPRs 0 - 31. */ | |
774 | return copy_regset_to_user(child, &user_ppc_native_view, | |
775 | REGSET_FPR, 0, 32 * sizeof(double), | |
776 | (void __user *) data); | |
777 | ||
778 | case PPC_PTRACE_SETFPREGS: /* Set FPRs 0 - 31. */ | |
779 | return copy_regset_from_user(child, &user_ppc_native_view, | |
780 | REGSET_FPR, 0, 32 * sizeof(double), | |
781 | (const void __user *) data); | |
e17666ba BH |
782 | } |
783 | ||
c391cd00 | 784 | return -EPERM; |
e17666ba BH |
785 | } |
786 | ||
481bed45 | 787 | long arch_ptrace(struct task_struct *child, long request, long addr, long data) |
1da177e4 | 788 | { |
1da177e4 LT |
789 | int ret = -EPERM; |
790 | ||
1da177e4 | 791 | switch (request) { |
1da177e4 | 792 | /* read the word at location addr in the USER area. */ |
1da177e4 LT |
793 | case PTRACE_PEEKUSR: { |
794 | unsigned long index, tmp; | |
795 | ||
796 | ret = -EIO; | |
797 | /* convert to index and check */ | |
e8a30302 | 798 | #ifdef CONFIG_PPC32 |
1da177e4 | 799 | index = (unsigned long) addr >> 2; |
e8a30302 SR |
800 | if ((addr & 3) || (index > PT_FPSCR) |
801 | || (child->thread.regs == NULL)) | |
802 | #else | |
803 | index = (unsigned long) addr >> 3; | |
804 | if ((addr & 7) || (index > PT_FPSCR)) | |
805 | #endif | |
1da177e4 LT |
806 | break; |
807 | ||
808 | CHECK_FULL_REGS(child->thread.regs); | |
809 | if (index < PT_FPR0) { | |
865418d8 | 810 | tmp = ptrace_get_reg(child, (int) index); |
1da177e4 | 811 | } else { |
e8a30302 | 812 | flush_fp_to_thread(child); |
9c75a31c MN |
813 | tmp = ((unsigned long *)child->thread.fpr) |
814 | [TS_FPRWIDTH * (index - PT_FPR0)]; | |
1da177e4 LT |
815 | } |
816 | ret = put_user(tmp,(unsigned long __user *) data); | |
817 | break; | |
818 | } | |
819 | ||
1da177e4 LT |
820 | /* write the word at location addr in the USER area */ |
821 | case PTRACE_POKEUSR: { | |
822 | unsigned long index; | |
823 | ||
824 | ret = -EIO; | |
825 | /* convert to index and check */ | |
e8a30302 | 826 | #ifdef CONFIG_PPC32 |
1da177e4 | 827 | index = (unsigned long) addr >> 2; |
e8a30302 SR |
828 | if ((addr & 3) || (index > PT_FPSCR) |
829 | || (child->thread.regs == NULL)) | |
830 | #else | |
831 | index = (unsigned long) addr >> 3; | |
832 | if ((addr & 7) || (index > PT_FPSCR)) | |
833 | #endif | |
1da177e4 LT |
834 | break; |
835 | ||
836 | CHECK_FULL_REGS(child->thread.regs); | |
1da177e4 | 837 | if (index < PT_FPR0) { |
865418d8 | 838 | ret = ptrace_put_reg(child, index, data); |
1da177e4 | 839 | } else { |
e8a30302 | 840 | flush_fp_to_thread(child); |
9c75a31c MN |
841 | ((unsigned long *)child->thread.fpr) |
842 | [TS_FPRWIDTH * (index - PT_FPR0)] = data; | |
1da177e4 LT |
843 | ret = 0; |
844 | } | |
845 | break; | |
846 | } | |
847 | ||
e8a30302 SR |
848 | case PTRACE_GET_DEBUGREG: { |
849 | ret = -EINVAL; | |
850 | /* We only support one DABR and no IABRS at the moment */ | |
851 | if (addr > 0) | |
852 | break; | |
853 | ret = put_user(child->thread.dabr, | |
854 | (unsigned long __user *)data); | |
855 | break; | |
856 | } | |
857 | ||
858 | case PTRACE_SET_DEBUGREG: | |
859 | ret = ptrace_set_debugreg(child, addr, data); | |
860 | break; | |
e8a30302 | 861 | |
e17666ba BH |
862 | #ifdef CONFIG_PPC64 |
863 | case PTRACE_GETREGS64: | |
864 | #endif | |
c391cd00 RM |
865 | case PTRACE_GETREGS: /* Get all pt_regs from the child. */ |
866 | return copy_regset_to_user(child, &user_ppc_native_view, | |
867 | REGSET_GPR, | |
868 | 0, sizeof(struct pt_regs), | |
869 | (void __user *) data); | |
e8a30302 | 870 | |
e17666ba BH |
871 | #ifdef CONFIG_PPC64 |
872 | case PTRACE_SETREGS64: | |
873 | #endif | |
c391cd00 RM |
874 | case PTRACE_SETREGS: /* Set all gp regs in the child. */ |
875 | return copy_regset_from_user(child, &user_ppc_native_view, | |
876 | REGSET_GPR, | |
877 | 0, sizeof(struct pt_regs), | |
878 | (const void __user *) data); | |
879 | ||
880 | case PTRACE_GETFPREGS: /* Get the child FPU state (FPR0...31 + FPSCR) */ | |
881 | return copy_regset_to_user(child, &user_ppc_native_view, | |
882 | REGSET_FPR, | |
883 | 0, sizeof(elf_fpregset_t), | |
884 | (void __user *) data); | |
885 | ||
886 | case PTRACE_SETFPREGS: /* Set the child FPU state (FPR0...31 + FPSCR) */ | |
887 | return copy_regset_from_user(child, &user_ppc_native_view, | |
888 | REGSET_FPR, | |
889 | 0, sizeof(elf_fpregset_t), | |
890 | (const void __user *) data); | |
e8a30302 | 891 | |
1da177e4 LT |
892 | #ifdef CONFIG_ALTIVEC |
893 | case PTRACE_GETVRREGS: | |
c391cd00 RM |
894 | return copy_regset_to_user(child, &user_ppc_native_view, |
895 | REGSET_VMX, | |
896 | 0, (33 * sizeof(vector128) + | |
897 | sizeof(u32)), | |
898 | (void __user *) data); | |
1da177e4 LT |
899 | |
900 | case PTRACE_SETVRREGS: | |
c391cd00 RM |
901 | return copy_regset_from_user(child, &user_ppc_native_view, |
902 | REGSET_VMX, | |
903 | 0, (33 * sizeof(vector128) + | |
904 | sizeof(u32)), | |
905 | (const void __user *) data); | |
1da177e4 | 906 | #endif |
ce48b210 MN |
907 | #ifdef CONFIG_VSX |
908 | case PTRACE_GETVSRREGS: | |
909 | return copy_regset_to_user(child, &user_ppc_native_view, | |
910 | REGSET_VSX, | |
911 | 0, (32 * sizeof(vector128) + | |
912 | sizeof(u32)), | |
913 | (void __user *) data); | |
914 | ||
915 | case PTRACE_SETVSRREGS: | |
916 | return copy_regset_from_user(child, &user_ppc_native_view, | |
917 | REGSET_VSX, | |
918 | 0, (32 * sizeof(vector128) + | |
919 | sizeof(u32)), | |
920 | (const void __user *) data); | |
921 | #endif | |
1da177e4 LT |
922 | #ifdef CONFIG_SPE |
923 | case PTRACE_GETEVRREGS: | |
924 | /* Get the child spe register state. */ | |
c391cd00 RM |
925 | return copy_regset_to_user(child, &user_ppc_native_view, |
926 | REGSET_SPE, 0, 35 * sizeof(u32), | |
927 | (void __user *) data); | |
1da177e4 LT |
928 | |
929 | case PTRACE_SETEVRREGS: | |
930 | /* Set the child spe register state. */ | |
c391cd00 RM |
931 | return copy_regset_from_user(child, &user_ppc_native_view, |
932 | REGSET_SPE, 0, 35 * sizeof(u32), | |
933 | (const void __user *) data); | |
1da177e4 LT |
934 | #endif |
935 | ||
e17666ba BH |
936 | /* Old reverse args ptrace callss */ |
937 | case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */ | |
938 | case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */ | |
939 | case PPC_PTRACE_GETFPREGS: /* Get FPRs 0 - 31. */ | |
940 | case PPC_PTRACE_SETFPREGS: /* Get FPRs 0 - 31. */ | |
941 | ret = arch_ptrace_old(child, request, addr, data); | |
942 | break; | |
943 | ||
1da177e4 LT |
944 | default: |
945 | ret = ptrace_request(child, request, addr, data); | |
946 | break; | |
947 | } | |
1da177e4 LT |
948 | return ret; |
949 | } | |
950 | ||
ea9c102c | 951 | static void do_syscall_trace(void) |
1da177e4 | 952 | { |
ea9c102c DW |
953 | /* the 0x80 provides a way for the tracing parent to distinguish |
954 | between a syscall stop and SIGTRAP delivery */ | |
1da177e4 LT |
955 | ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) |
956 | ? 0x80 : 0)); | |
957 | ||
958 | /* | |
959 | * this isn't the same as continuing with a signal, but it will do | |
960 | * for normal use. strace only continues with a signal if the | |
961 | * stopping signal is not SIGTRAP. -brl | |
962 | */ | |
963 | if (current->exit_code) { | |
964 | send_sig(current->exit_code, current, 1); | |
965 | current->exit_code = 0; | |
966 | } | |
967 | } | |
ea9c102c DW |
968 | |
969 | void do_syscall_trace_enter(struct pt_regs *regs) | |
970 | { | |
e8a30302 | 971 | secure_computing(regs->gpr[0]); |
e8a30302 | 972 | |
ea9c102c DW |
973 | if (test_thread_flag(TIF_SYSCALL_TRACE) |
974 | && (current->ptrace & PT_PTRACED)) | |
975 | do_syscall_trace(); | |
976 | ||
cfcd1705 DW |
977 | if (unlikely(current->audit_context)) { |
978 | #ifdef CONFIG_PPC64 | |
979 | if (!test_thread_flag(TIF_32BIT)) | |
980 | audit_syscall_entry(AUDIT_ARCH_PPC64, | |
981 | regs->gpr[0], | |
982 | regs->gpr[3], regs->gpr[4], | |
983 | regs->gpr[5], regs->gpr[6]); | |
984 | else | |
e8a30302 | 985 | #endif |
cfcd1705 DW |
986 | audit_syscall_entry(AUDIT_ARCH_PPC, |
987 | regs->gpr[0], | |
988 | regs->gpr[3] & 0xffffffff, | |
989 | regs->gpr[4] & 0xffffffff, | |
990 | regs->gpr[5] & 0xffffffff, | |
991 | regs->gpr[6] & 0xffffffff); | |
992 | } | |
ea9c102c DW |
993 | } |
994 | ||
995 | void do_syscall_trace_leave(struct pt_regs *regs) | |
996 | { | |
ea9c102c | 997 | if (unlikely(current->audit_context)) |
4b9c876a | 998 | audit_syscall_exit((regs->ccr&0x10000000)?AUDITSC_FAILURE:AUDITSC_SUCCESS, |
ea9c102c DW |
999 | regs->result); |
1000 | ||
e8a30302 | 1001 | if ((test_thread_flag(TIF_SYSCALL_TRACE) |
1bd79336 | 1002 | || test_thread_flag(TIF_SINGLESTEP)) |
ea9c102c DW |
1003 | && (current->ptrace & PT_PTRACED)) |
1004 | do_syscall_trace(); | |
1005 | } |