Commit | Line | Data |
---|---|---|
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 | { | |
218 | flush_fp_to_thread(target); | |
219 | ||
220 | BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) != | |
221 | offsetof(struct thread_struct, fpr[32])); | |
222 | ||
223 | return user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
224 | &target->thread.fpr, 0, -1); | |
225 | } | |
226 | ||
227 | static int fpr_set(struct task_struct *target, const struct user_regset *regset, | |
228 | unsigned int pos, unsigned int count, | |
229 | const void *kbuf, const void __user *ubuf) | |
230 | { | |
231 | flush_fp_to_thread(target); | |
232 | ||
233 | BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) != | |
234 | offsetof(struct thread_struct, fpr[32])); | |
235 | ||
236 | return user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
237 | &target->thread.fpr, 0, -1); | |
238 | } | |
239 | ||
865418d8 BH |
240 | |
241 | #ifdef CONFIG_ALTIVEC | |
242 | /* | |
243 | * Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go. | |
244 | * The transfer totals 34 quadword. Quadwords 0-31 contain the | |
245 | * corresponding vector registers. Quadword 32 contains the vscr as the | |
246 | * last word (offset 12) within that quadword. Quadword 33 contains the | |
247 | * vrsave as the first word (offset 0) within the quadword. | |
248 | * | |
249 | * This definition of the VMX state is compatible with the current PPC32 | |
250 | * ptrace interface. This allows signal handling and ptrace to use the | |
251 | * same structures. This also simplifies the implementation of a bi-arch | |
252 | * (combined (32- and 64-bit) gdb. | |
253 | */ | |
254 | ||
3caf06c6 RM |
255 | static int vr_active(struct task_struct *target, |
256 | const struct user_regset *regset) | |
257 | { | |
258 | flush_altivec_to_thread(target); | |
259 | return target->thread.used_vr ? regset->n : 0; | |
260 | } | |
261 | ||
262 | static int vr_get(struct task_struct *target, const struct user_regset *regset, | |
263 | unsigned int pos, unsigned int count, | |
264 | void *kbuf, void __user *ubuf) | |
265 | { | |
266 | int ret; | |
267 | ||
268 | flush_altivec_to_thread(target); | |
269 | ||
270 | BUILD_BUG_ON(offsetof(struct thread_struct, vscr) != | |
271 | offsetof(struct thread_struct, vr[32])); | |
272 | ||
273 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
274 | &target->thread.vr, 0, | |
275 | 33 * sizeof(vector128)); | |
276 | if (!ret) { | |
277 | /* | |
278 | * Copy out only the low-order word of vrsave. | |
279 | */ | |
280 | union { | |
281 | elf_vrreg_t reg; | |
282 | u32 word; | |
283 | } vrsave; | |
284 | memset(&vrsave, 0, sizeof(vrsave)); | |
285 | vrsave.word = target->thread.vrsave; | |
286 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave, | |
287 | 33 * sizeof(vector128), -1); | |
288 | } | |
289 | ||
290 | return ret; | |
291 | } | |
292 | ||
293 | static int vr_set(struct task_struct *target, const struct user_regset *regset, | |
294 | unsigned int pos, unsigned int count, | |
295 | const void *kbuf, const void __user *ubuf) | |
296 | { | |
297 | int ret; | |
298 | ||
299 | flush_altivec_to_thread(target); | |
300 | ||
301 | BUILD_BUG_ON(offsetof(struct thread_struct, vscr) != | |
302 | offsetof(struct thread_struct, vr[32])); | |
303 | ||
304 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
305 | &target->thread.vr, 0, 33 * sizeof(vector128)); | |
306 | if (!ret && count > 0) { | |
307 | /* | |
308 | * We use only the first word of vrsave. | |
309 | */ | |
310 | union { | |
311 | elf_vrreg_t reg; | |
312 | u32 word; | |
313 | } vrsave; | |
314 | memset(&vrsave, 0, sizeof(vrsave)); | |
315 | vrsave.word = target->thread.vrsave; | |
316 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave, | |
317 | 33 * sizeof(vector128), -1); | |
318 | if (!ret) | |
319 | target->thread.vrsave = vrsave.word; | |
320 | } | |
321 | ||
322 | return ret; | |
323 | } | |
865418d8 BH |
324 | #endif /* CONFIG_ALTIVEC */ |
325 | ||
326 | #ifdef CONFIG_SPE | |
327 | ||
328 | /* | |
329 | * For get_evrregs/set_evrregs functions 'data' has the following layout: | |
330 | * | |
331 | * struct { | |
332 | * u32 evr[32]; | |
333 | * u64 acc; | |
334 | * u32 spefscr; | |
335 | * } | |
336 | */ | |
337 | ||
a4e4b175 RM |
338 | static int evr_active(struct task_struct *target, |
339 | const struct user_regset *regset) | |
865418d8 | 340 | { |
a4e4b175 RM |
341 | flush_spe_to_thread(target); |
342 | return target->thread.used_spe ? regset->n : 0; | |
343 | } | |
865418d8 | 344 | |
a4e4b175 RM |
345 | static int evr_get(struct task_struct *target, const struct user_regset *regset, |
346 | unsigned int pos, unsigned int count, | |
347 | void *kbuf, void __user *ubuf) | |
348 | { | |
349 | int ret; | |
865418d8 | 350 | |
a4e4b175 | 351 | flush_spe_to_thread(target); |
865418d8 | 352 | |
a4e4b175 RM |
353 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, |
354 | &target->thread.evr, | |
355 | 0, sizeof(target->thread.evr)); | |
865418d8 | 356 | |
a4e4b175 RM |
357 | BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) != |
358 | offsetof(struct thread_struct, spefscr)); | |
359 | ||
360 | if (!ret) | |
361 | ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
362 | &target->thread.acc, | |
363 | sizeof(target->thread.evr), -1); | |
364 | ||
365 | return ret; | |
366 | } | |
367 | ||
368 | static int evr_set(struct task_struct *target, const struct user_regset *regset, | |
369 | unsigned int pos, unsigned int count, | |
370 | const void *kbuf, const void __user *ubuf) | |
371 | { | |
372 | int ret; | |
373 | ||
374 | flush_spe_to_thread(target); | |
375 | ||
376 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
377 | &target->thread.evr, | |
378 | 0, sizeof(target->thread.evr)); | |
865418d8 | 379 | |
a4e4b175 RM |
380 | BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) != |
381 | offsetof(struct thread_struct, spefscr)); | |
382 | ||
383 | if (!ret) | |
384 | ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
385 | &target->thread.acc, | |
386 | sizeof(target->thread.evr), -1); | |
387 | ||
388 | return ret; | |
865418d8 | 389 | } |
865418d8 BH |
390 | #endif /* CONFIG_SPE */ |
391 | ||
392 | ||
80fdf470 RM |
393 | /* |
394 | * These are our native regset flavors. | |
395 | */ | |
396 | enum powerpc_regset { | |
397 | REGSET_GPR, | |
398 | REGSET_FPR, | |
399 | #ifdef CONFIG_ALTIVEC | |
400 | REGSET_VMX, | |
401 | #endif | |
402 | #ifdef CONFIG_SPE | |
403 | REGSET_SPE, | |
404 | #endif | |
405 | }; | |
406 | ||
407 | static const struct user_regset native_regsets[] = { | |
408 | [REGSET_GPR] = { | |
409 | .core_note_type = NT_PRSTATUS, .n = ELF_NGREG, | |
410 | .size = sizeof(long), .align = sizeof(long), | |
411 | .get = gpr_get, .set = gpr_set | |
412 | }, | |
413 | [REGSET_FPR] = { | |
414 | .core_note_type = NT_PRFPREG, .n = ELF_NFPREG, | |
415 | .size = sizeof(double), .align = sizeof(double), | |
416 | .get = fpr_get, .set = fpr_set | |
417 | }, | |
418 | #ifdef CONFIG_ALTIVEC | |
419 | [REGSET_VMX] = { | |
420 | .core_note_type = NT_PPC_VMX, .n = 34, | |
421 | .size = sizeof(vector128), .align = sizeof(vector128), | |
422 | .active = vr_active, .get = vr_get, .set = vr_set | |
423 | }, | |
424 | #endif | |
425 | #ifdef CONFIG_SPE | |
426 | [REGSET_SPE] = { | |
427 | .n = 35, | |
428 | .size = sizeof(u32), .align = sizeof(u32), | |
429 | .active = evr_active, .get = evr_get, .set = evr_set | |
430 | }, | |
431 | #endif | |
432 | }; | |
433 | ||
434 | static const struct user_regset_view user_ppc_native_view = { | |
435 | .name = UTS_MACHINE, .e_machine = ELF_ARCH, .ei_osabi = ELF_OSABI, | |
436 | .regsets = native_regsets, .n = ARRAY_SIZE(native_regsets) | |
437 | }; | |
438 | ||
fa8f5cb0 RM |
439 | #ifdef CONFIG_PPC64 |
440 | #include <linux/compat.h> | |
441 | ||
442 | static int gpr32_get(struct task_struct *target, | |
443 | const struct user_regset *regset, | |
444 | unsigned int pos, unsigned int count, | |
445 | void *kbuf, void __user *ubuf) | |
446 | { | |
447 | const unsigned long *regs = &target->thread.regs->gpr[0]; | |
448 | compat_ulong_t *k = kbuf; | |
449 | compat_ulong_t __user *u = ubuf; | |
450 | compat_ulong_t reg; | |
451 | ||
452 | if (target->thread.regs == NULL) | |
453 | return -EIO; | |
454 | ||
455 | CHECK_FULL_REGS(target->thread.regs); | |
456 | ||
457 | pos /= sizeof(reg); | |
458 | count /= sizeof(reg); | |
459 | ||
460 | if (kbuf) | |
461 | for (; count > 0 && pos < PT_MSR; --count) | |
462 | *k++ = regs[pos++]; | |
463 | else | |
464 | for (; count > 0 && pos < PT_MSR; --count) | |
465 | if (__put_user((compat_ulong_t) regs[pos++], u++)) | |
466 | return -EFAULT; | |
467 | ||
468 | if (count > 0 && pos == PT_MSR) { | |
469 | reg = get_user_msr(target); | |
470 | if (kbuf) | |
471 | *k++ = reg; | |
472 | else if (__put_user(reg, u++)) | |
473 | return -EFAULT; | |
474 | ++pos; | |
475 | --count; | |
476 | } | |
477 | ||
478 | if (kbuf) | |
479 | for (; count > 0 && pos < PT_REGS_COUNT; --count) | |
480 | *k++ = regs[pos++]; | |
481 | else | |
482 | for (; count > 0 && pos < PT_REGS_COUNT; --count) | |
483 | if (__put_user((compat_ulong_t) regs[pos++], u++)) | |
484 | return -EFAULT; | |
485 | ||
486 | kbuf = k; | |
487 | ubuf = u; | |
488 | pos *= sizeof(reg); | |
489 | count *= sizeof(reg); | |
490 | return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf, | |
491 | PT_REGS_COUNT * sizeof(reg), -1); | |
492 | } | |
493 | ||
494 | static int gpr32_set(struct task_struct *target, | |
495 | const struct user_regset *regset, | |
496 | unsigned int pos, unsigned int count, | |
497 | const void *kbuf, const void __user *ubuf) | |
498 | { | |
499 | unsigned long *regs = &target->thread.regs->gpr[0]; | |
500 | const compat_ulong_t *k = kbuf; | |
501 | const compat_ulong_t __user *u = ubuf; | |
502 | compat_ulong_t reg; | |
503 | ||
504 | if (target->thread.regs == NULL) | |
505 | return -EIO; | |
506 | ||
507 | CHECK_FULL_REGS(target->thread.regs); | |
508 | ||
509 | pos /= sizeof(reg); | |
510 | count /= sizeof(reg); | |
511 | ||
512 | if (kbuf) | |
513 | for (; count > 0 && pos < PT_MSR; --count) | |
514 | regs[pos++] = *k++; | |
515 | else | |
516 | for (; count > 0 && pos < PT_MSR; --count) { | |
517 | if (__get_user(reg, u++)) | |
518 | return -EFAULT; | |
519 | regs[pos++] = reg; | |
520 | } | |
521 | ||
522 | ||
523 | if (count > 0 && pos == PT_MSR) { | |
524 | if (kbuf) | |
525 | reg = *k++; | |
526 | else if (__get_user(reg, u++)) | |
527 | return -EFAULT; | |
528 | set_user_msr(target, reg); | |
529 | ++pos; | |
530 | --count; | |
531 | } | |
532 | ||
533 | if (kbuf) | |
534 | for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) | |
535 | regs[pos++] = *k++; | |
536 | else | |
537 | for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) { | |
538 | if (__get_user(reg, u++)) | |
539 | return -EFAULT; | |
540 | regs[pos++] = reg; | |
541 | } | |
542 | ||
543 | if (count > 0 && pos == PT_TRAP) { | |
544 | if (kbuf) | |
545 | reg = *k++; | |
546 | else if (__get_user(reg, u++)) | |
547 | return -EFAULT; | |
548 | set_user_trap(target, reg); | |
549 | ++pos; | |
550 | --count; | |
551 | } | |
552 | ||
553 | kbuf = k; | |
554 | ubuf = u; | |
555 | pos *= sizeof(reg); | |
556 | count *= sizeof(reg); | |
557 | return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, | |
558 | (PT_TRAP + 1) * sizeof(reg), -1); | |
559 | } | |
560 | ||
561 | /* | |
562 | * These are the regset flavors matching the CONFIG_PPC32 native set. | |
563 | */ | |
564 | static const struct user_regset compat_regsets[] = { | |
565 | [REGSET_GPR] = { | |
566 | .core_note_type = NT_PRSTATUS, .n = ELF_NGREG, | |
567 | .size = sizeof(compat_long_t), .align = sizeof(compat_long_t), | |
568 | .get = gpr32_get, .set = gpr32_set | |
569 | }, | |
570 | [REGSET_FPR] = { | |
571 | .core_note_type = NT_PRFPREG, .n = ELF_NFPREG, | |
572 | .size = sizeof(double), .align = sizeof(double), | |
573 | .get = fpr_get, .set = fpr_set | |
574 | }, | |
575 | #ifdef CONFIG_ALTIVEC | |
576 | [REGSET_VMX] = { | |
577 | .core_note_type = NT_PPC_VMX, .n = 34, | |
578 | .size = sizeof(vector128), .align = sizeof(vector128), | |
579 | .active = vr_active, .get = vr_get, .set = vr_set | |
580 | }, | |
581 | #endif | |
582 | #ifdef CONFIG_SPE | |
583 | [REGSET_SPE] = { | |
584 | .n = 35, | |
585 | .size = sizeof(u32), .align = sizeof(u32), | |
586 | .active = evr_active, .get = evr_get, .set = evr_set | |
587 | }, | |
588 | #endif | |
589 | }; | |
590 | ||
591 | static const struct user_regset_view user_ppc_compat_view = { | |
592 | .name = "ppc", .e_machine = EM_PPC, .ei_osabi = ELF_OSABI, | |
593 | .regsets = compat_regsets, .n = ARRAY_SIZE(compat_regsets) | |
594 | }; | |
595 | #endif /* CONFIG_PPC64 */ | |
596 | ||
80fdf470 RM |
597 | const struct user_regset_view *task_user_regset_view(struct task_struct *task) |
598 | { | |
fa8f5cb0 RM |
599 | #ifdef CONFIG_PPC64 |
600 | if (test_tsk_thread_flag(task, TIF_32BIT)) | |
601 | return &user_ppc_compat_view; | |
602 | #endif | |
80fdf470 RM |
603 | return &user_ppc_native_view; |
604 | } | |
605 | ||
606 | ||
2a84b0d7 | 607 | void user_enable_single_step(struct task_struct *task) |
865418d8 BH |
608 | { |
609 | struct pt_regs *regs = task->thread.regs; | |
610 | ||
611 | if (regs != NULL) { | |
612 | #if defined(CONFIG_40x) || defined(CONFIG_BOOKE) | |
613 | task->thread.dbcr0 = DBCR0_IDM | DBCR0_IC; | |
614 | regs->msr |= MSR_DE; | |
615 | #else | |
616 | regs->msr |= MSR_SE; | |
617 | #endif | |
618 | } | |
619 | set_tsk_thread_flag(task, TIF_SINGLESTEP); | |
620 | } | |
621 | ||
2a84b0d7 | 622 | void user_disable_single_step(struct task_struct *task) |
865418d8 BH |
623 | { |
624 | struct pt_regs *regs = task->thread.regs; | |
625 | ||
626 | if (regs != NULL) { | |
627 | #if defined(CONFIG_40x) || defined(CONFIG_BOOKE) | |
628 | task->thread.dbcr0 = 0; | |
629 | regs->msr &= ~MSR_DE; | |
630 | #else | |
631 | regs->msr &= ~MSR_SE; | |
632 | #endif | |
633 | } | |
634 | clear_tsk_thread_flag(task, TIF_SINGLESTEP); | |
635 | } | |
636 | ||
abd06505 BH |
637 | static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr, |
638 | unsigned long data) | |
639 | { | |
640 | /* We only support one DABR and no IABRS at the moment */ | |
641 | if (addr > 0) | |
642 | return -EINVAL; | |
643 | ||
644 | /* The bottom 3 bits are flags */ | |
645 | if ((data & ~0x7UL) >= TASK_SIZE) | |
646 | return -EIO; | |
647 | ||
648 | /* Ensure translation is on */ | |
649 | if (data && !(data & DABR_TRANSLATION)) | |
650 | return -EIO; | |
651 | ||
652 | task->thread.dabr = data; | |
653 | return 0; | |
654 | } | |
abd06505 | 655 | |
1da177e4 LT |
656 | /* |
657 | * Called by kernel/ptrace.c when detaching.. | |
658 | * | |
659 | * Make sure single step bits etc are not set. | |
660 | */ | |
661 | void ptrace_disable(struct task_struct *child) | |
662 | { | |
663 | /* make sure the single step bit is not set. */ | |
2a84b0d7 | 664 | user_disable_single_step(child); |
1da177e4 LT |
665 | } |
666 | ||
e17666ba BH |
667 | /* |
668 | * Here are the old "legacy" powerpc specific getregs/setregs ptrace calls, | |
669 | * we mark them as obsolete now, they will be removed in a future version | |
670 | */ | |
671 | static long arch_ptrace_old(struct task_struct *child, long request, long addr, | |
672 | long data) | |
673 | { | |
c391cd00 RM |
674 | switch (request) { |
675 | case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */ | |
676 | return copy_regset_to_user(child, &user_ppc_native_view, | |
677 | REGSET_GPR, 0, 32 * sizeof(long), | |
678 | (void __user *) data); | |
679 | ||
680 | case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */ | |
681 | return copy_regset_from_user(child, &user_ppc_native_view, | |
682 | REGSET_GPR, 0, 32 * sizeof(long), | |
683 | (const void __user *) data); | |
684 | ||
685 | case PPC_PTRACE_GETFPREGS: /* Get FPRs 0 - 31. */ | |
686 | return copy_regset_to_user(child, &user_ppc_native_view, | |
687 | REGSET_FPR, 0, 32 * sizeof(double), | |
688 | (void __user *) data); | |
689 | ||
690 | case PPC_PTRACE_SETFPREGS: /* Set FPRs 0 - 31. */ | |
691 | return copy_regset_from_user(child, &user_ppc_native_view, | |
692 | REGSET_FPR, 0, 32 * sizeof(double), | |
693 | (const void __user *) data); | |
e17666ba BH |
694 | } |
695 | ||
c391cd00 | 696 | return -EPERM; |
e17666ba BH |
697 | } |
698 | ||
481bed45 | 699 | long arch_ptrace(struct task_struct *child, long request, long addr, long data) |
1da177e4 | 700 | { |
1da177e4 LT |
701 | int ret = -EPERM; |
702 | ||
1da177e4 | 703 | switch (request) { |
1da177e4 | 704 | /* read the word at location addr in the USER area. */ |
1da177e4 LT |
705 | case PTRACE_PEEKUSR: { |
706 | unsigned long index, tmp; | |
707 | ||
708 | ret = -EIO; | |
709 | /* convert to index and check */ | |
e8a30302 | 710 | #ifdef CONFIG_PPC32 |
1da177e4 | 711 | index = (unsigned long) addr >> 2; |
e8a30302 SR |
712 | if ((addr & 3) || (index > PT_FPSCR) |
713 | || (child->thread.regs == NULL)) | |
714 | #else | |
715 | index = (unsigned long) addr >> 3; | |
716 | if ((addr & 7) || (index > PT_FPSCR)) | |
717 | #endif | |
1da177e4 LT |
718 | break; |
719 | ||
720 | CHECK_FULL_REGS(child->thread.regs); | |
721 | if (index < PT_FPR0) { | |
865418d8 | 722 | tmp = ptrace_get_reg(child, (int) index); |
1da177e4 | 723 | } else { |
e8a30302 | 724 | flush_fp_to_thread(child); |
1da177e4 LT |
725 | tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0]; |
726 | } | |
727 | ret = put_user(tmp,(unsigned long __user *) data); | |
728 | break; | |
729 | } | |
730 | ||
1da177e4 LT |
731 | /* write the word at location addr in the USER area */ |
732 | case PTRACE_POKEUSR: { | |
733 | unsigned long index; | |
734 | ||
735 | ret = -EIO; | |
736 | /* convert to index and check */ | |
e8a30302 | 737 | #ifdef CONFIG_PPC32 |
1da177e4 | 738 | index = (unsigned long) addr >> 2; |
e8a30302 SR |
739 | if ((addr & 3) || (index > PT_FPSCR) |
740 | || (child->thread.regs == NULL)) | |
741 | #else | |
742 | index = (unsigned long) addr >> 3; | |
743 | if ((addr & 7) || (index > PT_FPSCR)) | |
744 | #endif | |
1da177e4 LT |
745 | break; |
746 | ||
747 | CHECK_FULL_REGS(child->thread.regs); | |
1da177e4 | 748 | if (index < PT_FPR0) { |
865418d8 | 749 | ret = ptrace_put_reg(child, index, data); |
1da177e4 | 750 | } else { |
e8a30302 | 751 | flush_fp_to_thread(child); |
1da177e4 LT |
752 | ((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data; |
753 | ret = 0; | |
754 | } | |
755 | break; | |
756 | } | |
757 | ||
e8a30302 SR |
758 | case PTRACE_GET_DEBUGREG: { |
759 | ret = -EINVAL; | |
760 | /* We only support one DABR and no IABRS at the moment */ | |
761 | if (addr > 0) | |
762 | break; | |
763 | ret = put_user(child->thread.dabr, | |
764 | (unsigned long __user *)data); | |
765 | break; | |
766 | } | |
767 | ||
768 | case PTRACE_SET_DEBUGREG: | |
769 | ret = ptrace_set_debugreg(child, addr, data); | |
770 | break; | |
e8a30302 | 771 | |
e17666ba BH |
772 | #ifdef CONFIG_PPC64 |
773 | case PTRACE_GETREGS64: | |
774 | #endif | |
c391cd00 RM |
775 | case PTRACE_GETREGS: /* Get all pt_regs from the child. */ |
776 | return copy_regset_to_user(child, &user_ppc_native_view, | |
777 | REGSET_GPR, | |
778 | 0, sizeof(struct pt_regs), | |
779 | (void __user *) data); | |
e8a30302 | 780 | |
e17666ba BH |
781 | #ifdef CONFIG_PPC64 |
782 | case PTRACE_SETREGS64: | |
783 | #endif | |
c391cd00 RM |
784 | case PTRACE_SETREGS: /* Set all gp regs in the child. */ |
785 | return copy_regset_from_user(child, &user_ppc_native_view, | |
786 | REGSET_GPR, | |
787 | 0, sizeof(struct pt_regs), | |
788 | (const void __user *) data); | |
789 | ||
790 | case PTRACE_GETFPREGS: /* Get the child FPU state (FPR0...31 + FPSCR) */ | |
791 | return copy_regset_to_user(child, &user_ppc_native_view, | |
792 | REGSET_FPR, | |
793 | 0, sizeof(elf_fpregset_t), | |
794 | (void __user *) data); | |
795 | ||
796 | case PTRACE_SETFPREGS: /* Set the child FPU state (FPR0...31 + FPSCR) */ | |
797 | return copy_regset_from_user(child, &user_ppc_native_view, | |
798 | REGSET_FPR, | |
799 | 0, sizeof(elf_fpregset_t), | |
800 | (const void __user *) data); | |
e8a30302 | 801 | |
1da177e4 LT |
802 | #ifdef CONFIG_ALTIVEC |
803 | case PTRACE_GETVRREGS: | |
c391cd00 RM |
804 | return copy_regset_to_user(child, &user_ppc_native_view, |
805 | REGSET_VMX, | |
806 | 0, (33 * sizeof(vector128) + | |
807 | sizeof(u32)), | |
808 | (void __user *) data); | |
1da177e4 LT |
809 | |
810 | case PTRACE_SETVRREGS: | |
c391cd00 RM |
811 | return copy_regset_from_user(child, &user_ppc_native_view, |
812 | REGSET_VMX, | |
813 | 0, (33 * sizeof(vector128) + | |
814 | sizeof(u32)), | |
815 | (const void __user *) data); | |
1da177e4 LT |
816 | #endif |
817 | #ifdef CONFIG_SPE | |
818 | case PTRACE_GETEVRREGS: | |
819 | /* Get the child spe register state. */ | |
c391cd00 RM |
820 | return copy_regset_to_user(child, &user_ppc_native_view, |
821 | REGSET_SPE, 0, 35 * sizeof(u32), | |
822 | (void __user *) data); | |
1da177e4 LT |
823 | |
824 | case PTRACE_SETEVRREGS: | |
825 | /* Set the child spe register state. */ | |
c391cd00 RM |
826 | return copy_regset_from_user(child, &user_ppc_native_view, |
827 | REGSET_SPE, 0, 35 * sizeof(u32), | |
828 | (const void __user *) data); | |
1da177e4 LT |
829 | #endif |
830 | ||
e17666ba BH |
831 | /* Old reverse args ptrace callss */ |
832 | case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */ | |
833 | case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */ | |
834 | case PPC_PTRACE_GETFPREGS: /* Get FPRs 0 - 31. */ | |
835 | case PPC_PTRACE_SETFPREGS: /* Get FPRs 0 - 31. */ | |
836 | ret = arch_ptrace_old(child, request, addr, data); | |
837 | break; | |
838 | ||
1da177e4 LT |
839 | default: |
840 | ret = ptrace_request(child, request, addr, data); | |
841 | break; | |
842 | } | |
1da177e4 LT |
843 | return ret; |
844 | } | |
845 | ||
ea9c102c | 846 | static void do_syscall_trace(void) |
1da177e4 | 847 | { |
ea9c102c DW |
848 | /* the 0x80 provides a way for the tracing parent to distinguish |
849 | between a syscall stop and SIGTRAP delivery */ | |
1da177e4 LT |
850 | ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) |
851 | ? 0x80 : 0)); | |
852 | ||
853 | /* | |
854 | * this isn't the same as continuing with a signal, but it will do | |
855 | * for normal use. strace only continues with a signal if the | |
856 | * stopping signal is not SIGTRAP. -brl | |
857 | */ | |
858 | if (current->exit_code) { | |
859 | send_sig(current->exit_code, current, 1); | |
860 | current->exit_code = 0; | |
861 | } | |
862 | } | |
ea9c102c DW |
863 | |
864 | void do_syscall_trace_enter(struct pt_regs *regs) | |
865 | { | |
e8a30302 | 866 | secure_computing(regs->gpr[0]); |
e8a30302 | 867 | |
ea9c102c DW |
868 | if (test_thread_flag(TIF_SYSCALL_TRACE) |
869 | && (current->ptrace & PT_PTRACED)) | |
870 | do_syscall_trace(); | |
871 | ||
cfcd1705 DW |
872 | if (unlikely(current->audit_context)) { |
873 | #ifdef CONFIG_PPC64 | |
874 | if (!test_thread_flag(TIF_32BIT)) | |
875 | audit_syscall_entry(AUDIT_ARCH_PPC64, | |
876 | regs->gpr[0], | |
877 | regs->gpr[3], regs->gpr[4], | |
878 | regs->gpr[5], regs->gpr[6]); | |
879 | else | |
e8a30302 | 880 | #endif |
cfcd1705 DW |
881 | audit_syscall_entry(AUDIT_ARCH_PPC, |
882 | regs->gpr[0], | |
883 | regs->gpr[3] & 0xffffffff, | |
884 | regs->gpr[4] & 0xffffffff, | |
885 | regs->gpr[5] & 0xffffffff, | |
886 | regs->gpr[6] & 0xffffffff); | |
887 | } | |
ea9c102c DW |
888 | } |
889 | ||
890 | void do_syscall_trace_leave(struct pt_regs *regs) | |
891 | { | |
ea9c102c | 892 | if (unlikely(current->audit_context)) |
4b9c876a | 893 | audit_syscall_exit((regs->ccr&0x10000000)?AUDITSC_FAILURE:AUDITSC_SUCCESS, |
ea9c102c DW |
894 | regs->result); |
895 | ||
e8a30302 | 896 | if ((test_thread_flag(TIF_SYSCALL_TRACE) |
1bd79336 | 897 | || test_thread_flag(TIF_SINGLESTEP)) |
ea9c102c DW |
898 | && (current->ptrace & PT_PTRACED)) |
899 | do_syscall_trace(); | |
900 | } |