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1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 1992 Ross Biro | |
7 | * Copyright (C) Linus Torvalds | |
8 | * Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle | |
9 | * Copyright (C) 1996 David S. Miller | |
10 | * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com | |
11 | * Copyright (C) 1999 MIPS Technologies, Inc. | |
12 | * Copyright (C) 2000 Ulf Carlsson | |
13 | * | |
14 | * At this time Linux/MIPS64 only supports syscall tracing, even for 32-bit | |
15 | * binaries. | |
16 | */ | |
1da177e4 | 17 | #include <linux/compiler.h> |
c3fc5cd5 | 18 | #include <linux/context_tracking.h> |
7aeb753b | 19 | #include <linux/elf.h> |
1da177e4 LT |
20 | #include <linux/kernel.h> |
21 | #include <linux/sched.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/ptrace.h> | |
7aeb753b | 25 | #include <linux/regset.h> |
1da177e4 | 26 | #include <linux/smp.h> |
1da177e4 | 27 | #include <linux/security.h> |
40e084a5 | 28 | #include <linux/stddef.h> |
bc3d22c1 | 29 | #include <linux/tracehook.h> |
293c5bd1 RB |
30 | #include <linux/audit.h> |
31 | #include <linux/seccomp.h> | |
1d7bf993 | 32 | #include <linux/ftrace.h> |
1da177e4 | 33 | |
f8280c8d | 34 | #include <asm/byteorder.h> |
1da177e4 | 35 | #include <asm/cpu.h> |
9b26616c | 36 | #include <asm/cpu-info.h> |
e50c0a8f | 37 | #include <asm/dsp.h> |
1da177e4 LT |
38 | #include <asm/fpu.h> |
39 | #include <asm/mipsregs.h> | |
101b3531 | 40 | #include <asm/mipsmtregs.h> |
1da177e4 LT |
41 | #include <asm/pgtable.h> |
42 | #include <asm/page.h> | |
bec9b2b2 | 43 | #include <asm/syscall.h> |
7c0f6ba6 | 44 | #include <linux/uaccess.h> |
1da177e4 | 45 | #include <asm/bootinfo.h> |
ea3d710f | 46 | #include <asm/reg.h> |
1da177e4 | 47 | |
1d7bf993 RB |
48 | #define CREATE_TRACE_POINTS |
49 | #include <trace/events/syscalls.h> | |
50 | ||
ac9ad83b PB |
51 | static void init_fp_ctx(struct task_struct *target) |
52 | { | |
53 | /* If FP has been used then the target already has context */ | |
54 | if (tsk_used_math(target)) | |
55 | return; | |
56 | ||
57 | /* Begin with data registers set to all 1s... */ | |
58 | memset(&target->thread.fpu.fpr, ~0, sizeof(target->thread.fpu.fpr)); | |
59 | ||
abf378be | 60 | /* FCSR has been preset by `mips_set_personality_nan'. */ |
ac9ad83b PB |
61 | |
62 | /* | |
63 | * Record that the target has "used" math, such that the context | |
64 | * just initialised, and any modifications made by the caller, | |
65 | * aren't discarded. | |
66 | */ | |
67 | set_stopped_child_used_math(target); | |
68 | } | |
69 | ||
1da177e4 LT |
70 | /* |
71 | * Called by kernel/ptrace.c when detaching.. | |
72 | * | |
73 | * Make sure single step bits etc are not set. | |
74 | */ | |
75 | void ptrace_disable(struct task_struct *child) | |
76 | { | |
0926bf95 DD |
77 | /* Don't load the watchpoint registers for the ex-child. */ |
78 | clear_tsk_thread_flag(child, TIF_LOAD_WATCH); | |
1da177e4 LT |
79 | } |
80 | ||
abf378be | 81 | /* |
5a1aca44 MR |
82 | * Poke at FCSR according to its mask. Set the Cause bits even |
83 | * if a corresponding Enable bit is set. This will be noticed at | |
84 | * the time the thread is switched to and SIGFPE thrown accordingly. | |
abf378be MR |
85 | */ |
86 | static void ptrace_setfcr31(struct task_struct *child, u32 value) | |
87 | { | |
88 | u32 fcr31; | |
89 | u32 mask; | |
90 | ||
abf378be MR |
91 | fcr31 = child->thread.fpu.fcr31; |
92 | mask = boot_cpu_data.fpu_msk31; | |
93 | child->thread.fpu.fcr31 = (value & ~mask) | (fcr31 & mask); | |
94 | } | |
95 | ||
ea3d710f | 96 | /* |
70342287 | 97 | * Read a general register set. We always use the 64-bit format, even |
ea3d710f DJ |
98 | * for 32-bit kernels and for 32-bit processes on a 64-bit kernel. |
99 | * Registers are sign extended to fill the available space. | |
100 | */ | |
a79ebea6 | 101 | int ptrace_getregs(struct task_struct *child, struct user_pt_regs __user *data) |
ea3d710f DJ |
102 | { |
103 | struct pt_regs *regs; | |
104 | int i; | |
105 | ||
106 | if (!access_ok(VERIFY_WRITE, data, 38 * 8)) | |
107 | return -EIO; | |
108 | ||
40bc9c67 | 109 | regs = task_pt_regs(child); |
ea3d710f DJ |
110 | |
111 | for (i = 0; i < 32; i++) | |
a79ebea6 AS |
112 | __put_user((long)regs->regs[i], (__s64 __user *)&data->regs[i]); |
113 | __put_user((long)regs->lo, (__s64 __user *)&data->lo); | |
114 | __put_user((long)regs->hi, (__s64 __user *)&data->hi); | |
115 | __put_user((long)regs->cp0_epc, (__s64 __user *)&data->cp0_epc); | |
116 | __put_user((long)regs->cp0_badvaddr, (__s64 __user *)&data->cp0_badvaddr); | |
117 | __put_user((long)regs->cp0_status, (__s64 __user *)&data->cp0_status); | |
118 | __put_user((long)regs->cp0_cause, (__s64 __user *)&data->cp0_cause); | |
ea3d710f DJ |
119 | |
120 | return 0; | |
121 | } | |
122 | ||
123 | /* | |
124 | * Write a general register set. As for PTRACE_GETREGS, we always use | |
125 | * the 64-bit format. On a 32-bit kernel only the lower order half | |
126 | * (according to endianness) will be used. | |
127 | */ | |
a79ebea6 | 128 | int ptrace_setregs(struct task_struct *child, struct user_pt_regs __user *data) |
ea3d710f DJ |
129 | { |
130 | struct pt_regs *regs; | |
131 | int i; | |
132 | ||
133 | if (!access_ok(VERIFY_READ, data, 38 * 8)) | |
134 | return -EIO; | |
135 | ||
40bc9c67 | 136 | regs = task_pt_regs(child); |
ea3d710f DJ |
137 | |
138 | for (i = 0; i < 32; i++) | |
a79ebea6 AS |
139 | __get_user(regs->regs[i], (__s64 __user *)&data->regs[i]); |
140 | __get_user(regs->lo, (__s64 __user *)&data->lo); | |
141 | __get_user(regs->hi, (__s64 __user *)&data->hi); | |
142 | __get_user(regs->cp0_epc, (__s64 __user *)&data->cp0_epc); | |
ea3d710f DJ |
143 | |
144 | /* badvaddr, status, and cause may not be written. */ | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
49a89efb | 149 | int ptrace_getfpregs(struct task_struct *child, __u32 __user *data) |
ea3d710f DJ |
150 | { |
151 | int i; | |
152 | ||
153 | if (!access_ok(VERIFY_WRITE, data, 33 * 8)) | |
154 | return -EIO; | |
155 | ||
156 | if (tsk_used_math(child)) { | |
bbd426f5 | 157 | union fpureg *fregs = get_fpu_regs(child); |
ea3d710f | 158 | for (i = 0; i < 32; i++) |
bbd426f5 PB |
159 | __put_user(get_fpr64(&fregs[i], 0), |
160 | i + (__u64 __user *)data); | |
ea3d710f DJ |
161 | } else { |
162 | for (i = 0; i < 32; i++) | |
49a89efb | 163 | __put_user((__u64) -1, i + (__u64 __user *) data); |
ea3d710f DJ |
164 | } |
165 | ||
49a89efb | 166 | __put_user(child->thread.fpu.fcr31, data + 64); |
656ff9be | 167 | __put_user(boot_cpu_data.fpu_id, data + 65); |
ea3d710f DJ |
168 | |
169 | return 0; | |
170 | } | |
171 | ||
49a89efb | 172 | int ptrace_setfpregs(struct task_struct *child, __u32 __user *data) |
ea3d710f | 173 | { |
bbd426f5 PB |
174 | union fpureg *fregs; |
175 | u64 fpr_val; | |
9b26616c | 176 | u32 value; |
ea3d710f DJ |
177 | int i; |
178 | ||
179 | if (!access_ok(VERIFY_READ, data, 33 * 8)) | |
180 | return -EIO; | |
181 | ||
ac9ad83b | 182 | init_fp_ctx(child); |
ea3d710f DJ |
183 | fregs = get_fpu_regs(child); |
184 | ||
bbd426f5 PB |
185 | for (i = 0; i < 32; i++) { |
186 | __get_user(fpr_val, i + (__u64 __user *)data); | |
187 | set_fpr64(&fregs[i], 0, fpr_val); | |
188 | } | |
ea3d710f | 189 | |
9b26616c | 190 | __get_user(value, data + 64); |
abf378be | 191 | ptrace_setfcr31(child, value); |
ea3d710f DJ |
192 | |
193 | /* FIR may not be written. */ | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
0926bf95 DD |
198 | int ptrace_get_watch_regs(struct task_struct *child, |
199 | struct pt_watch_regs __user *addr) | |
200 | { | |
201 | enum pt_watch_style style; | |
202 | int i; | |
203 | ||
57c7ea51 | 204 | if (!cpu_has_watch || boot_cpu_data.watch_reg_use_cnt == 0) |
0926bf95 DD |
205 | return -EIO; |
206 | if (!access_ok(VERIFY_WRITE, addr, sizeof(struct pt_watch_regs))) | |
207 | return -EIO; | |
208 | ||
209 | #ifdef CONFIG_32BIT | |
210 | style = pt_watch_style_mips32; | |
211 | #define WATCH_STYLE mips32 | |
212 | #else | |
213 | style = pt_watch_style_mips64; | |
214 | #define WATCH_STYLE mips64 | |
215 | #endif | |
216 | ||
217 | __put_user(style, &addr->style); | |
57c7ea51 | 218 | __put_user(boot_cpu_data.watch_reg_use_cnt, |
0926bf95 | 219 | &addr->WATCH_STYLE.num_valid); |
57c7ea51 | 220 | for (i = 0; i < boot_cpu_data.watch_reg_use_cnt; i++) { |
0926bf95 DD |
221 | __put_user(child->thread.watch.mips3264.watchlo[i], |
222 | &addr->WATCH_STYLE.watchlo[i]); | |
50af501c JH |
223 | __put_user(child->thread.watch.mips3264.watchhi[i] & |
224 | (MIPS_WATCHHI_MASK | MIPS_WATCHHI_IRW), | |
0926bf95 | 225 | &addr->WATCH_STYLE.watchhi[i]); |
57c7ea51 | 226 | __put_user(boot_cpu_data.watch_reg_masks[i], |
0926bf95 DD |
227 | &addr->WATCH_STYLE.watch_masks[i]); |
228 | } | |
229 | for (; i < 8; i++) { | |
230 | __put_user(0, &addr->WATCH_STYLE.watchlo[i]); | |
231 | __put_user(0, &addr->WATCH_STYLE.watchhi[i]); | |
232 | __put_user(0, &addr->WATCH_STYLE.watch_masks[i]); | |
233 | } | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | int ptrace_set_watch_regs(struct task_struct *child, | |
239 | struct pt_watch_regs __user *addr) | |
240 | { | |
241 | int i; | |
242 | int watch_active = 0; | |
243 | unsigned long lt[NUM_WATCH_REGS]; | |
244 | u16 ht[NUM_WATCH_REGS]; | |
245 | ||
57c7ea51 | 246 | if (!cpu_has_watch || boot_cpu_data.watch_reg_use_cnt == 0) |
0926bf95 DD |
247 | return -EIO; |
248 | if (!access_ok(VERIFY_READ, addr, sizeof(struct pt_watch_regs))) | |
249 | return -EIO; | |
250 | /* Check the values. */ | |
57c7ea51 | 251 | for (i = 0; i < boot_cpu_data.watch_reg_use_cnt; i++) { |
0926bf95 DD |
252 | __get_user(lt[i], &addr->WATCH_STYLE.watchlo[i]); |
253 | #ifdef CONFIG_32BIT | |
254 | if (lt[i] & __UA_LIMIT) | |
255 | return -EINVAL; | |
256 | #else | |
257 | if (test_tsk_thread_flag(child, TIF_32BIT_ADDR)) { | |
258 | if (lt[i] & 0xffffffff80000000UL) | |
259 | return -EINVAL; | |
260 | } else { | |
261 | if (lt[i] & __UA_LIMIT) | |
262 | return -EINVAL; | |
263 | } | |
264 | #endif | |
265 | __get_user(ht[i], &addr->WATCH_STYLE.watchhi[i]); | |
50af501c | 266 | if (ht[i] & ~MIPS_WATCHHI_MASK) |
0926bf95 DD |
267 | return -EINVAL; |
268 | } | |
269 | /* Install them. */ | |
57c7ea51 | 270 | for (i = 0; i < boot_cpu_data.watch_reg_use_cnt; i++) { |
50af501c | 271 | if (lt[i] & MIPS_WATCHLO_IRW) |
0926bf95 DD |
272 | watch_active = 1; |
273 | child->thread.watch.mips3264.watchlo[i] = lt[i]; | |
274 | /* Set the G bit. */ | |
275 | child->thread.watch.mips3264.watchhi[i] = ht[i]; | |
276 | } | |
277 | ||
278 | if (watch_active) | |
279 | set_tsk_thread_flag(child, TIF_LOAD_WATCH); | |
280 | else | |
281 | clear_tsk_thread_flag(child, TIF_LOAD_WATCH); | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
7aeb753b RB |
286 | /* regset get/set implementations */ |
287 | ||
c23b3d1a AS |
288 | #if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32) |
289 | ||
290 | static int gpr32_get(struct task_struct *target, | |
291 | const struct user_regset *regset, | |
292 | unsigned int pos, unsigned int count, | |
293 | void *kbuf, void __user *ubuf) | |
7aeb753b RB |
294 | { |
295 | struct pt_regs *regs = task_pt_regs(target); | |
c23b3d1a | 296 | u32 uregs[ELF_NGREG] = {}; |
7aeb753b | 297 | |
08c941bf | 298 | mips_dump_regs32(uregs, regs); |
c23b3d1a AS |
299 | return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0, |
300 | sizeof(uregs)); | |
7aeb753b RB |
301 | } |
302 | ||
c23b3d1a AS |
303 | static int gpr32_set(struct task_struct *target, |
304 | const struct user_regset *regset, | |
305 | unsigned int pos, unsigned int count, | |
306 | const void *kbuf, const void __user *ubuf) | |
7aeb753b | 307 | { |
c23b3d1a AS |
308 | struct pt_regs *regs = task_pt_regs(target); |
309 | u32 uregs[ELF_NGREG]; | |
310 | unsigned start, num_regs, i; | |
311 | int err; | |
312 | ||
313 | start = pos / sizeof(u32); | |
314 | num_regs = count / sizeof(u32); | |
315 | ||
316 | if (start + num_regs > ELF_NGREG) | |
317 | return -EIO; | |
318 | ||
319 | err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, uregs, 0, | |
320 | sizeof(uregs)); | |
321 | if (err) | |
322 | return err; | |
323 | ||
324 | for (i = start; i < num_regs; i++) { | |
325 | /* | |
326 | * Cast all values to signed here so that if this is a 64-bit | |
327 | * kernel, the supplied 32-bit values will be sign extended. | |
328 | */ | |
329 | switch (i) { | |
330 | case MIPS32_EF_R1 ... MIPS32_EF_R25: | |
331 | /* k0/k1 are ignored. */ | |
332 | case MIPS32_EF_R28 ... MIPS32_EF_R31: | |
333 | regs->regs[i - MIPS32_EF_R0] = (s32)uregs[i]; | |
334 | break; | |
335 | case MIPS32_EF_LO: | |
336 | regs->lo = (s32)uregs[i]; | |
337 | break; | |
338 | case MIPS32_EF_HI: | |
339 | regs->hi = (s32)uregs[i]; | |
340 | break; | |
341 | case MIPS32_EF_CP0_EPC: | |
342 | regs->cp0_epc = (s32)uregs[i]; | |
343 | break; | |
344 | } | |
345 | } | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | #endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */ | |
351 | ||
352 | #ifdef CONFIG_64BIT | |
353 | ||
354 | static int gpr64_get(struct task_struct *target, | |
355 | const struct user_regset *regset, | |
356 | unsigned int pos, unsigned int count, | |
357 | void *kbuf, void __user *ubuf) | |
358 | { | |
359 | struct pt_regs *regs = task_pt_regs(target); | |
360 | u64 uregs[ELF_NGREG] = {}; | |
c23b3d1a | 361 | |
08c941bf | 362 | mips_dump_regs64(uregs, regs); |
c23b3d1a AS |
363 | return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0, |
364 | sizeof(uregs)); | |
365 | } | |
7aeb753b | 366 | |
c23b3d1a AS |
367 | static int gpr64_set(struct task_struct *target, |
368 | const struct user_regset *regset, | |
369 | unsigned int pos, unsigned int count, | |
370 | const void *kbuf, const void __user *ubuf) | |
371 | { | |
372 | struct pt_regs *regs = task_pt_regs(target); | |
373 | u64 uregs[ELF_NGREG]; | |
374 | unsigned start, num_regs, i; | |
375 | int err; | |
376 | ||
377 | start = pos / sizeof(u64); | |
378 | num_regs = count / sizeof(u64); | |
379 | ||
380 | if (start + num_regs > ELF_NGREG) | |
381 | return -EIO; | |
7aeb753b | 382 | |
c23b3d1a AS |
383 | err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, uregs, 0, |
384 | sizeof(uregs)); | |
385 | if (err) | |
386 | return err; | |
387 | ||
388 | for (i = start; i < num_regs; i++) { | |
389 | switch (i) { | |
390 | case MIPS64_EF_R1 ... MIPS64_EF_R25: | |
391 | /* k0/k1 are ignored. */ | |
392 | case MIPS64_EF_R28 ... MIPS64_EF_R31: | |
393 | regs->regs[i - MIPS64_EF_R0] = uregs[i]; | |
394 | break; | |
395 | case MIPS64_EF_LO: | |
396 | regs->lo = uregs[i]; | |
397 | break; | |
398 | case MIPS64_EF_HI: | |
399 | regs->hi = uregs[i]; | |
400 | break; | |
401 | case MIPS64_EF_CP0_EPC: | |
402 | regs->cp0_epc = uregs[i]; | |
403 | break; | |
404 | } | |
405 | } | |
7aeb753b RB |
406 | |
407 | return 0; | |
408 | } | |
409 | ||
c23b3d1a AS |
410 | #endif /* CONFIG_64BIT */ |
411 | ||
7aeb753b RB |
412 | static int fpr_get(struct task_struct *target, |
413 | const struct user_regset *regset, | |
414 | unsigned int pos, unsigned int count, | |
415 | void *kbuf, void __user *ubuf) | |
416 | { | |
72b22bba PB |
417 | unsigned i; |
418 | int err; | |
419 | u64 fpr_val; | |
420 | ||
7aeb753b | 421 | /* XXX fcr31 */ |
72b22bba PB |
422 | |
423 | if (sizeof(target->thread.fpu.fpr[i]) == sizeof(elf_fpreg_t)) | |
424 | return user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
425 | &target->thread.fpu, | |
426 | 0, sizeof(elf_fpregset_t)); | |
427 | ||
428 | for (i = 0; i < NUM_FPU_REGS; i++) { | |
429 | fpr_val = get_fpr64(&target->thread.fpu.fpr[i], 0); | |
430 | err = user_regset_copyout(&pos, &count, &kbuf, &ubuf, | |
431 | &fpr_val, i * sizeof(elf_fpreg_t), | |
432 | (i + 1) * sizeof(elf_fpreg_t)); | |
433 | if (err) | |
434 | return err; | |
435 | } | |
436 | ||
437 | return 0; | |
7aeb753b RB |
438 | } |
439 | ||
440 | static int fpr_set(struct task_struct *target, | |
441 | const struct user_regset *regset, | |
442 | unsigned int pos, unsigned int count, | |
443 | const void *kbuf, const void __user *ubuf) | |
444 | { | |
72b22bba PB |
445 | unsigned i; |
446 | int err; | |
447 | u64 fpr_val; | |
448 | ||
7aeb753b | 449 | /* XXX fcr31 */ |
72b22bba | 450 | |
ac9ad83b PB |
451 | init_fp_ctx(target); |
452 | ||
72b22bba PB |
453 | if (sizeof(target->thread.fpu.fpr[i]) == sizeof(elf_fpreg_t)) |
454 | return user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
455 | &target->thread.fpu, | |
456 | 0, sizeof(elf_fpregset_t)); | |
457 | ||
458 | for (i = 0; i < NUM_FPU_REGS; i++) { | |
459 | err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, | |
460 | &fpr_val, i * sizeof(elf_fpreg_t), | |
461 | (i + 1) * sizeof(elf_fpreg_t)); | |
462 | if (err) | |
463 | return err; | |
464 | set_fpr64(&target->thread.fpu.fpr[i], 0, fpr_val); | |
465 | } | |
466 | ||
467 | return 0; | |
7aeb753b RB |
468 | } |
469 | ||
470 | enum mips_regset { | |
471 | REGSET_GPR, | |
472 | REGSET_FPR, | |
473 | }; | |
474 | ||
40e084a5 RB |
475 | struct pt_regs_offset { |
476 | const char *name; | |
477 | int offset; | |
478 | }; | |
479 | ||
480 | #define REG_OFFSET_NAME(reg, r) { \ | |
481 | .name = #reg, \ | |
482 | .offset = offsetof(struct pt_regs, r) \ | |
483 | } | |
484 | ||
485 | #define REG_OFFSET_END { \ | |
486 | .name = NULL, \ | |
487 | .offset = 0 \ | |
488 | } | |
489 | ||
490 | static const struct pt_regs_offset regoffset_table[] = { | |
491 | REG_OFFSET_NAME(r0, regs[0]), | |
492 | REG_OFFSET_NAME(r1, regs[1]), | |
493 | REG_OFFSET_NAME(r2, regs[2]), | |
494 | REG_OFFSET_NAME(r3, regs[3]), | |
495 | REG_OFFSET_NAME(r4, regs[4]), | |
496 | REG_OFFSET_NAME(r5, regs[5]), | |
497 | REG_OFFSET_NAME(r6, regs[6]), | |
498 | REG_OFFSET_NAME(r7, regs[7]), | |
499 | REG_OFFSET_NAME(r8, regs[8]), | |
500 | REG_OFFSET_NAME(r9, regs[9]), | |
501 | REG_OFFSET_NAME(r10, regs[10]), | |
502 | REG_OFFSET_NAME(r11, regs[11]), | |
503 | REG_OFFSET_NAME(r12, regs[12]), | |
504 | REG_OFFSET_NAME(r13, regs[13]), | |
505 | REG_OFFSET_NAME(r14, regs[14]), | |
506 | REG_OFFSET_NAME(r15, regs[15]), | |
507 | REG_OFFSET_NAME(r16, regs[16]), | |
508 | REG_OFFSET_NAME(r17, regs[17]), | |
509 | REG_OFFSET_NAME(r18, regs[18]), | |
510 | REG_OFFSET_NAME(r19, regs[19]), | |
511 | REG_OFFSET_NAME(r20, regs[20]), | |
512 | REG_OFFSET_NAME(r21, regs[21]), | |
513 | REG_OFFSET_NAME(r22, regs[22]), | |
514 | REG_OFFSET_NAME(r23, regs[23]), | |
515 | REG_OFFSET_NAME(r24, regs[24]), | |
516 | REG_OFFSET_NAME(r25, regs[25]), | |
517 | REG_OFFSET_NAME(r26, regs[26]), | |
518 | REG_OFFSET_NAME(r27, regs[27]), | |
519 | REG_OFFSET_NAME(r28, regs[28]), | |
520 | REG_OFFSET_NAME(r29, regs[29]), | |
521 | REG_OFFSET_NAME(r30, regs[30]), | |
522 | REG_OFFSET_NAME(r31, regs[31]), | |
523 | REG_OFFSET_NAME(c0_status, cp0_status), | |
524 | REG_OFFSET_NAME(hi, hi), | |
525 | REG_OFFSET_NAME(lo, lo), | |
526 | #ifdef CONFIG_CPU_HAS_SMARTMIPS | |
527 | REG_OFFSET_NAME(acx, acx), | |
528 | #endif | |
529 | REG_OFFSET_NAME(c0_badvaddr, cp0_badvaddr), | |
530 | REG_OFFSET_NAME(c0_cause, cp0_cause), | |
531 | REG_OFFSET_NAME(c0_epc, cp0_epc), | |
40e084a5 RB |
532 | #ifdef CONFIG_CPU_CAVIUM_OCTEON |
533 | REG_OFFSET_NAME(mpl0, mpl[0]), | |
534 | REG_OFFSET_NAME(mpl1, mpl[1]), | |
535 | REG_OFFSET_NAME(mpl2, mpl[2]), | |
536 | REG_OFFSET_NAME(mtp0, mtp[0]), | |
537 | REG_OFFSET_NAME(mtp1, mtp[1]), | |
538 | REG_OFFSET_NAME(mtp2, mtp[2]), | |
539 | #endif | |
540 | REG_OFFSET_END, | |
541 | }; | |
542 | ||
543 | /** | |
544 | * regs_query_register_offset() - query register offset from its name | |
545 | * @name: the name of a register | |
546 | * | |
547 | * regs_query_register_offset() returns the offset of a register in struct | |
548 | * pt_regs from its name. If the name is invalid, this returns -EINVAL; | |
549 | */ | |
550 | int regs_query_register_offset(const char *name) | |
551 | { | |
552 | const struct pt_regs_offset *roff; | |
553 | for (roff = regoffset_table; roff->name != NULL; roff++) | |
554 | if (!strcmp(roff->name, name)) | |
555 | return roff->offset; | |
556 | return -EINVAL; | |
557 | } | |
558 | ||
c23b3d1a AS |
559 | #if defined(CONFIG_32BIT) || defined(CONFIG_MIPS32_O32) |
560 | ||
7aeb753b RB |
561 | static const struct user_regset mips_regsets[] = { |
562 | [REGSET_GPR] = { | |
563 | .core_note_type = NT_PRSTATUS, | |
564 | .n = ELF_NGREG, | |
565 | .size = sizeof(unsigned int), | |
566 | .align = sizeof(unsigned int), | |
c23b3d1a AS |
567 | .get = gpr32_get, |
568 | .set = gpr32_set, | |
7aeb753b RB |
569 | }, |
570 | [REGSET_FPR] = { | |
571 | .core_note_type = NT_PRFPREG, | |
572 | .n = ELF_NFPREG, | |
573 | .size = sizeof(elf_fpreg_t), | |
574 | .align = sizeof(elf_fpreg_t), | |
575 | .get = fpr_get, | |
576 | .set = fpr_set, | |
577 | }, | |
578 | }; | |
579 | ||
580 | static const struct user_regset_view user_mips_view = { | |
581 | .name = "mips", | |
582 | .e_machine = ELF_ARCH, | |
583 | .ei_osabi = ELF_OSABI, | |
584 | .regsets = mips_regsets, | |
585 | .n = ARRAY_SIZE(mips_regsets), | |
586 | }; | |
587 | ||
c23b3d1a AS |
588 | #endif /* CONFIG_32BIT || CONFIG_MIPS32_O32 */ |
589 | ||
590 | #ifdef CONFIG_64BIT | |
591 | ||
7aeb753b RB |
592 | static const struct user_regset mips64_regsets[] = { |
593 | [REGSET_GPR] = { | |
594 | .core_note_type = NT_PRSTATUS, | |
595 | .n = ELF_NGREG, | |
596 | .size = sizeof(unsigned long), | |
597 | .align = sizeof(unsigned long), | |
c23b3d1a AS |
598 | .get = gpr64_get, |
599 | .set = gpr64_set, | |
7aeb753b RB |
600 | }, |
601 | [REGSET_FPR] = { | |
602 | .core_note_type = NT_PRFPREG, | |
603 | .n = ELF_NFPREG, | |
604 | .size = sizeof(elf_fpreg_t), | |
605 | .align = sizeof(elf_fpreg_t), | |
606 | .get = fpr_get, | |
607 | .set = fpr_set, | |
608 | }, | |
609 | }; | |
610 | ||
611 | static const struct user_regset_view user_mips64_view = { | |
c23b3d1a | 612 | .name = "mips64", |
7aeb753b RB |
613 | .e_machine = ELF_ARCH, |
614 | .ei_osabi = ELF_OSABI, | |
615 | .regsets = mips64_regsets, | |
c23b3d1a | 616 | .n = ARRAY_SIZE(mips64_regsets), |
7aeb753b RB |
617 | }; |
618 | ||
c23b3d1a AS |
619 | #endif /* CONFIG_64BIT */ |
620 | ||
7aeb753b RB |
621 | const struct user_regset_view *task_user_regset_view(struct task_struct *task) |
622 | { | |
623 | #ifdef CONFIG_32BIT | |
624 | return &user_mips_view; | |
c23b3d1a | 625 | #else |
7aeb753b | 626 | #ifdef CONFIG_MIPS32_O32 |
c23b3d1a AS |
627 | if (test_tsk_thread_flag(task, TIF_32BIT_REGS)) |
628 | return &user_mips_view; | |
7aeb753b | 629 | #endif |
7aeb753b | 630 | return &user_mips64_view; |
c23b3d1a | 631 | #endif |
7aeb753b RB |
632 | } |
633 | ||
9b05a69e NK |
634 | long arch_ptrace(struct task_struct *child, long request, |
635 | unsigned long addr, unsigned long data) | |
1da177e4 | 636 | { |
1da177e4 | 637 | int ret; |
fb671139 NK |
638 | void __user *addrp = (void __user *) addr; |
639 | void __user *datavp = (void __user *) data; | |
640 | unsigned long __user *datalp = (void __user *) data; | |
1da177e4 | 641 | |
1da177e4 LT |
642 | switch (request) { |
643 | /* when I and D space are separate, these will need to be fixed. */ | |
644 | case PTRACE_PEEKTEXT: /* read word at location addr. */ | |
76647323 AD |
645 | case PTRACE_PEEKDATA: |
646 | ret = generic_ptrace_peekdata(child, addr, data); | |
1da177e4 | 647 | break; |
1da177e4 LT |
648 | |
649 | /* Read the word at location addr in the USER area. */ | |
650 | case PTRACE_PEEKUSR: { | |
651 | struct pt_regs *regs; | |
bbd426f5 | 652 | union fpureg *fregs; |
1da177e4 LT |
653 | unsigned long tmp = 0; |
654 | ||
40bc9c67 | 655 | regs = task_pt_regs(child); |
1da177e4 LT |
656 | ret = 0; /* Default return value. */ |
657 | ||
658 | switch (addr) { | |
659 | case 0 ... 31: | |
660 | tmp = regs->regs[addr]; | |
661 | break; | |
662 | case FPR_BASE ... FPR_BASE + 31: | |
597ce172 PB |
663 | if (!tsk_used_math(child)) { |
664 | /* FP not yet used */ | |
665 | tmp = -1; | |
666 | break; | |
667 | } | |
668 | fregs = get_fpu_regs(child); | |
1da177e4 | 669 | |
875d43e7 | 670 | #ifdef CONFIG_32BIT |
597ce172 | 671 | if (test_thread_flag(TIF_32BIT_FPREGS)) { |
1da177e4 LT |
672 | /* |
673 | * The odd registers are actually the high | |
674 | * order bits of the values stored in the even | |
675 | * registers - unless we're using r2k_switch.S. | |
676 | */ | |
bbd426f5 PB |
677 | tmp = get_fpr32(&fregs[(addr & ~1) - FPR_BASE], |
678 | addr & 1); | |
597ce172 | 679 | break; |
1da177e4 | 680 | } |
597ce172 | 681 | #endif |
bbd426f5 | 682 | tmp = get_fpr32(&fregs[addr - FPR_BASE], 0); |
1da177e4 LT |
683 | break; |
684 | case PC: | |
685 | tmp = regs->cp0_epc; | |
686 | break; | |
687 | case CAUSE: | |
688 | tmp = regs->cp0_cause; | |
689 | break; | |
690 | case BADVADDR: | |
691 | tmp = regs->cp0_badvaddr; | |
692 | break; | |
693 | case MMHI: | |
694 | tmp = regs->hi; | |
695 | break; | |
696 | case MMLO: | |
697 | tmp = regs->lo; | |
698 | break; | |
9693a853 FBH |
699 | #ifdef CONFIG_CPU_HAS_SMARTMIPS |
700 | case ACX: | |
701 | tmp = regs->acx; | |
702 | break; | |
703 | #endif | |
1da177e4 | 704 | case FPC_CSR: |
eae89076 | 705 | tmp = child->thread.fpu.fcr31; |
1da177e4 | 706 | break; |
3351047f PB |
707 | case FPC_EIR: |
708 | /* implementation / version register */ | |
656ff9be | 709 | tmp = boot_cpu_data.fpu_id; |
1da177e4 | 710 | break; |
c134a5ec RB |
711 | case DSP_BASE ... DSP_BASE + 5: { |
712 | dspreg_t *dregs; | |
713 | ||
e50c0a8f RB |
714 | if (!cpu_has_dsp) { |
715 | tmp = 0; | |
716 | ret = -EIO; | |
481bed45 | 717 | goto out; |
e50c0a8f | 718 | } |
6c355852 RB |
719 | dregs = __get_dsp_regs(child); |
720 | tmp = (unsigned long) (dregs[addr - DSP_BASE]); | |
e50c0a8f | 721 | break; |
c134a5ec | 722 | } |
e50c0a8f RB |
723 | case DSP_CONTROL: |
724 | if (!cpu_has_dsp) { | |
725 | tmp = 0; | |
726 | ret = -EIO; | |
481bed45 | 727 | goto out; |
e50c0a8f RB |
728 | } |
729 | tmp = child->thread.dsp.dspcontrol; | |
730 | break; | |
1da177e4 LT |
731 | default: |
732 | tmp = 0; | |
733 | ret = -EIO; | |
481bed45 | 734 | goto out; |
1da177e4 | 735 | } |
fb671139 | 736 | ret = put_user(tmp, datalp); |
1da177e4 LT |
737 | break; |
738 | } | |
739 | ||
740 | /* when I and D space are separate, this will have to be fixed. */ | |
741 | case PTRACE_POKETEXT: /* write the word at location addr. */ | |
742 | case PTRACE_POKEDATA: | |
f284ce72 | 743 | ret = generic_ptrace_pokedata(child, addr, data); |
1da177e4 LT |
744 | break; |
745 | ||
746 | case PTRACE_POKEUSR: { | |
747 | struct pt_regs *regs; | |
748 | ret = 0; | |
40bc9c67 | 749 | regs = task_pt_regs(child); |
1da177e4 LT |
750 | |
751 | switch (addr) { | |
752 | case 0 ... 31: | |
753 | regs->regs[addr] = data; | |
754 | break; | |
755 | case FPR_BASE ... FPR_BASE + 31: { | |
bbd426f5 | 756 | union fpureg *fregs = get_fpu_regs(child); |
1da177e4 | 757 | |
ac9ad83b | 758 | init_fp_ctx(child); |
875d43e7 | 759 | #ifdef CONFIG_32BIT |
597ce172 PB |
760 | if (test_thread_flag(TIF_32BIT_FPREGS)) { |
761 | /* | |
762 | * The odd registers are actually the high | |
763 | * order bits of the values stored in the even | |
764 | * registers - unless we're using r2k_switch.S. | |
765 | */ | |
bbd426f5 PB |
766 | set_fpr32(&fregs[(addr & ~1) - FPR_BASE], |
767 | addr & 1, data); | |
597ce172 | 768 | break; |
1da177e4 LT |
769 | } |
770 | #endif | |
bbd426f5 | 771 | set_fpr64(&fregs[addr - FPR_BASE], 0, data); |
1da177e4 LT |
772 | break; |
773 | } | |
774 | case PC: | |
775 | regs->cp0_epc = data; | |
776 | break; | |
777 | case MMHI: | |
778 | regs->hi = data; | |
779 | break; | |
780 | case MMLO: | |
781 | regs->lo = data; | |
782 | break; | |
9693a853 FBH |
783 | #ifdef CONFIG_CPU_HAS_SMARTMIPS |
784 | case ACX: | |
785 | regs->acx = data; | |
786 | break; | |
787 | #endif | |
1da177e4 | 788 | case FPC_CSR: |
c9e56039 | 789 | init_fp_ctx(child); |
abf378be | 790 | ptrace_setfcr31(child, data); |
1da177e4 | 791 | break; |
c134a5ec RB |
792 | case DSP_BASE ... DSP_BASE + 5: { |
793 | dspreg_t *dregs; | |
794 | ||
e50c0a8f RB |
795 | if (!cpu_has_dsp) { |
796 | ret = -EIO; | |
797 | break; | |
798 | } | |
799 | ||
c134a5ec | 800 | dregs = __get_dsp_regs(child); |
e50c0a8f RB |
801 | dregs[addr - DSP_BASE] = data; |
802 | break; | |
c134a5ec | 803 | } |
e50c0a8f RB |
804 | case DSP_CONTROL: |
805 | if (!cpu_has_dsp) { | |
806 | ret = -EIO; | |
807 | break; | |
808 | } | |
809 | child->thread.dsp.dspcontrol = data; | |
810 | break; | |
1da177e4 LT |
811 | default: |
812 | /* The rest are not allowed. */ | |
813 | ret = -EIO; | |
814 | break; | |
815 | } | |
816 | break; | |
817 | } | |
818 | ||
ea3d710f | 819 | case PTRACE_GETREGS: |
fb671139 | 820 | ret = ptrace_getregs(child, datavp); |
ea3d710f DJ |
821 | break; |
822 | ||
823 | case PTRACE_SETREGS: | |
fb671139 | 824 | ret = ptrace_setregs(child, datavp); |
ea3d710f DJ |
825 | break; |
826 | ||
827 | case PTRACE_GETFPREGS: | |
fb671139 | 828 | ret = ptrace_getfpregs(child, datavp); |
ea3d710f DJ |
829 | break; |
830 | ||
831 | case PTRACE_SETFPREGS: | |
fb671139 | 832 | ret = ptrace_setfpregs(child, datavp); |
ea3d710f DJ |
833 | break; |
834 | ||
3c37026d | 835 | case PTRACE_GET_THREAD_AREA: |
fb671139 | 836 | ret = put_user(task_thread_info(child)->tp_value, datalp); |
3c37026d RB |
837 | break; |
838 | ||
0926bf95 | 839 | case PTRACE_GET_WATCH_REGS: |
fb671139 | 840 | ret = ptrace_get_watch_regs(child, addrp); |
0926bf95 DD |
841 | break; |
842 | ||
843 | case PTRACE_SET_WATCH_REGS: | |
fb671139 | 844 | ret = ptrace_set_watch_regs(child, addrp); |
0926bf95 DD |
845 | break; |
846 | ||
1da177e4 LT |
847 | default: |
848 | ret = ptrace_request(child, request, addr, data); | |
849 | break; | |
850 | } | |
481bed45 | 851 | out: |
1da177e4 LT |
852 | return ret; |
853 | } | |
854 | ||
855 | /* | |
856 | * Notification of system call entry/exit | |
857 | * - triggered by current->work.syscall_trace | |
858 | */ | |
4c21b8fd | 859 | asmlinkage long syscall_trace_enter(struct pt_regs *regs, long syscall) |
1da177e4 | 860 | { |
c3fc5cd5 RB |
861 | user_exit(); |
862 | ||
c2d9f177 LP |
863 | current_thread_info()->syscall = syscall; |
864 | ||
0dfa95aa RB |
865 | if (test_thread_flag(TIF_SYSCALL_TRACE) && |
866 | tracehook_report_syscall_entry(regs)) | |
2ac3c8d1 KC |
867 | return -1; |
868 | ||
869 | if (secure_computing(NULL) == -1) | |
870 | return -1; | |
293c5bd1 | 871 | |
1d7bf993 RB |
872 | if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) |
873 | trace_sys_enter(regs, regs->regs[2]); | |
874 | ||
91397401 | 875 | audit_syscall_entry(syscall, regs->regs[4], regs->regs[5], |
b05d8447 | 876 | regs->regs[6], regs->regs[7]); |
1225eb82 | 877 | return syscall; |
1da177e4 | 878 | } |
8b659a39 RB |
879 | |
880 | /* | |
881 | * Notification of system call entry/exit | |
882 | * - triggered by current->work.syscall_trace | |
883 | */ | |
884 | asmlinkage void syscall_trace_leave(struct pt_regs *regs) | |
885 | { | |
c3fc5cd5 RB |
886 | /* |
887 | * We may come here right after calling schedule_user() | |
888 | * or do_notify_resume(), in which case we can be in RCU | |
889 | * user mode. | |
890 | */ | |
891 | user_exit(); | |
892 | ||
d7e7528b | 893 | audit_syscall_exit(regs); |
8b659a39 | 894 | |
1d7bf993 RB |
895 | if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) |
896 | trace_sys_exit(regs, regs->regs[2]); | |
897 | ||
bc3d22c1 RB |
898 | if (test_thread_flag(TIF_SYSCALL_TRACE)) |
899 | tracehook_report_syscall_exit(regs, 0); | |
c3fc5cd5 RB |
900 | |
901 | user_enter(); | |
8b659a39 | 902 | } |