This source file includes following definitions.
- ptrace_disable
- genregs32_get
- genregs32_set
- fpregs32_get
- fpregs32_set
- task_user_regset_view
- arch_ptrace
- syscall_trace
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13 #include <linux/kernel.h>
14 #include <linux/sched.h>
15 #include <linux/mm.h>
16 #include <linux/errno.h>
17 #include <linux/ptrace.h>
18 #include <linux/user.h>
19 #include <linux/smp.h>
20 #include <linux/security.h>
21 #include <linux/signal.h>
22 #include <linux/regset.h>
23 #include <linux/elf.h>
24 #include <linux/tracehook.h>
25
26 #include <asm/pgtable.h>
27 #include <linux/uaccess.h>
28 #include <asm/cacheflush.h>
29
30 #include "kernel.h"
31
32
33
34
35
36
37
38
39 void ptrace_disable(struct task_struct *child)
40 {
41
42 }
43
44 enum sparc_regset {
45 REGSET_GENERAL,
46 REGSET_FP,
47 };
48
49 static int genregs32_get(struct task_struct *target,
50 const struct user_regset *regset,
51 unsigned int pos, unsigned int count,
52 void *kbuf, void __user *ubuf)
53 {
54 const struct pt_regs *regs = target->thread.kregs;
55 unsigned long __user *reg_window;
56 unsigned long *k = kbuf;
57 unsigned long __user *u = ubuf;
58 unsigned long reg;
59
60 if (target == current)
61 flush_user_windows();
62
63 pos /= sizeof(reg);
64 count /= sizeof(reg);
65
66 if (kbuf) {
67 for (; count > 0 && pos < 16; count--)
68 *k++ = regs->u_regs[pos++];
69
70 reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
71 reg_window -= 16;
72 for (; count > 0 && pos < 32; count--) {
73 if (get_user(*k++, ®_window[pos++]))
74 return -EFAULT;
75 }
76 } else {
77 for (; count > 0 && pos < 16; count--) {
78 if (put_user(regs->u_regs[pos++], u++))
79 return -EFAULT;
80 }
81
82 reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
83 reg_window -= 16;
84 for (; count > 0 && pos < 32; count--) {
85 if (get_user(reg, ®_window[pos++]) ||
86 put_user(reg, u++))
87 return -EFAULT;
88 }
89 }
90 while (count > 0) {
91 switch (pos) {
92 case 32:
93 reg = regs->psr;
94 break;
95 case 33:
96 reg = regs->pc;
97 break;
98 case 34:
99 reg = regs->npc;
100 break;
101 case 35:
102 reg = regs->y;
103 break;
104 case 36:
105 case 37:
106 reg = 0;
107 break;
108 default:
109 goto finish;
110 }
111
112 if (kbuf)
113 *k++ = reg;
114 else if (put_user(reg, u++))
115 return -EFAULT;
116 pos++;
117 count--;
118 }
119 finish:
120 pos *= sizeof(reg);
121 count *= sizeof(reg);
122
123 return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
124 38 * sizeof(reg), -1);
125 }
126
127 static int genregs32_set(struct task_struct *target,
128 const struct user_regset *regset,
129 unsigned int pos, unsigned int count,
130 const void *kbuf, const void __user *ubuf)
131 {
132 struct pt_regs *regs = target->thread.kregs;
133 unsigned long __user *reg_window;
134 const unsigned long *k = kbuf;
135 const unsigned long __user *u = ubuf;
136 unsigned long reg;
137
138 if (target == current)
139 flush_user_windows();
140
141 pos /= sizeof(reg);
142 count /= sizeof(reg);
143
144 if (kbuf) {
145 for (; count > 0 && pos < 16; count--)
146 regs->u_regs[pos++] = *k++;
147
148 reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
149 reg_window -= 16;
150 for (; count > 0 && pos < 32; count--) {
151 if (put_user(*k++, ®_window[pos++]))
152 return -EFAULT;
153 }
154 } else {
155 for (; count > 0 && pos < 16; count--) {
156 if (get_user(reg, u++))
157 return -EFAULT;
158 regs->u_regs[pos++] = reg;
159 }
160
161 reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
162 reg_window -= 16;
163 for (; count > 0 && pos < 32; count--) {
164 if (get_user(reg, u++) ||
165 put_user(reg, ®_window[pos++]))
166 return -EFAULT;
167 }
168 }
169 while (count > 0) {
170 unsigned long psr;
171
172 if (kbuf)
173 reg = *k++;
174 else if (get_user(reg, u++))
175 return -EFAULT;
176
177 switch (pos) {
178 case 32:
179 psr = regs->psr;
180 psr &= ~(PSR_ICC | PSR_SYSCALL);
181 psr |= (reg & (PSR_ICC | PSR_SYSCALL));
182 regs->psr = psr;
183 break;
184 case 33:
185 regs->pc = reg;
186 break;
187 case 34:
188 regs->npc = reg;
189 break;
190 case 35:
191 regs->y = reg;
192 break;
193 case 36:
194 case 37:
195 break;
196 default:
197 goto finish;
198 }
199
200 pos++;
201 count--;
202 }
203 finish:
204 pos *= sizeof(reg);
205 count *= sizeof(reg);
206
207 return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
208 38 * sizeof(reg), -1);
209 }
210
211 static int fpregs32_get(struct task_struct *target,
212 const struct user_regset *regset,
213 unsigned int pos, unsigned int count,
214 void *kbuf, void __user *ubuf)
215 {
216 const unsigned long *fpregs = target->thread.float_regs;
217 int ret = 0;
218
219 #if 0
220 if (target == current)
221 save_and_clear_fpu();
222 #endif
223
224 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
225 fpregs,
226 0, 32 * sizeof(u32));
227
228 if (!ret)
229 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
230 32 * sizeof(u32),
231 33 * sizeof(u32));
232 if (!ret)
233 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
234 &target->thread.fsr,
235 33 * sizeof(u32),
236 34 * sizeof(u32));
237
238 if (!ret) {
239 unsigned long val;
240
241 val = (1 << 8) | (8 << 16);
242 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
243 &val,
244 34 * sizeof(u32),
245 35 * sizeof(u32));
246 }
247
248 if (!ret)
249 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
250 35 * sizeof(u32), -1);
251
252 return ret;
253 }
254
255 static int fpregs32_set(struct task_struct *target,
256 const struct user_regset *regset,
257 unsigned int pos, unsigned int count,
258 const void *kbuf, const void __user *ubuf)
259 {
260 unsigned long *fpregs = target->thread.float_regs;
261 int ret;
262
263 #if 0
264 if (target == current)
265 save_and_clear_fpu();
266 #endif
267 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
268 fpregs,
269 0, 32 * sizeof(u32));
270 if (!ret)
271 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
272 32 * sizeof(u32),
273 33 * sizeof(u32));
274 if (!ret && count > 0) {
275 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
276 &target->thread.fsr,
277 33 * sizeof(u32),
278 34 * sizeof(u32));
279 }
280
281 if (!ret)
282 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
283 34 * sizeof(u32), -1);
284 return ret;
285 }
286
287 static const struct user_regset sparc32_regsets[] = {
288
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293
294
295 [REGSET_GENERAL] = {
296 .core_note_type = NT_PRSTATUS,
297 .n = 38,
298 .size = sizeof(u32), .align = sizeof(u32),
299 .get = genregs32_get, .set = genregs32_set
300 },
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310
311 [REGSET_FP] = {
312 .core_note_type = NT_PRFPREG,
313 .n = 99,
314 .size = sizeof(u32), .align = sizeof(u32),
315 .get = fpregs32_get, .set = fpregs32_set
316 },
317 };
318
319 static const struct user_regset_view user_sparc32_view = {
320 .name = "sparc", .e_machine = EM_SPARC,
321 .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
322 };
323
324 const struct user_regset_view *task_user_regset_view(struct task_struct *task)
325 {
326 return &user_sparc32_view;
327 }
328
329 struct fps {
330 unsigned long regs[32];
331 unsigned long fsr;
332 unsigned long flags;
333 unsigned long extra;
334 unsigned long fpqd;
335 struct fq {
336 unsigned long *insnaddr;
337 unsigned long insn;
338 } fpq[16];
339 };
340
341 long arch_ptrace(struct task_struct *child, long request,
342 unsigned long addr, unsigned long data)
343 {
344 unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
345 void __user *addr2p;
346 const struct user_regset_view *view;
347 struct pt_regs __user *pregs;
348 struct fps __user *fps;
349 int ret;
350
351 view = task_user_regset_view(current);
352 addr2p = (void __user *) addr2;
353 pregs = (struct pt_regs __user *) addr;
354 fps = (struct fps __user *) addr;
355
356 switch(request) {
357 case PTRACE_GETREGS: {
358 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
359 32 * sizeof(u32),
360 4 * sizeof(u32),
361 &pregs->psr);
362 if (!ret)
363 copy_regset_to_user(child, view, REGSET_GENERAL,
364 1 * sizeof(u32),
365 15 * sizeof(u32),
366 &pregs->u_regs[0]);
367 break;
368 }
369
370 case PTRACE_SETREGS: {
371 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
372 32 * sizeof(u32),
373 4 * sizeof(u32),
374 &pregs->psr);
375 if (!ret)
376 copy_regset_from_user(child, view, REGSET_GENERAL,
377 1 * sizeof(u32),
378 15 * sizeof(u32),
379 &pregs->u_regs[0]);
380 break;
381 }
382
383 case PTRACE_GETFPREGS: {
384 ret = copy_regset_to_user(child, view, REGSET_FP,
385 0 * sizeof(u32),
386 32 * sizeof(u32),
387 &fps->regs[0]);
388 if (!ret)
389 ret = copy_regset_to_user(child, view, REGSET_FP,
390 33 * sizeof(u32),
391 1 * sizeof(u32),
392 &fps->fsr);
393
394 if (!ret) {
395 if (__put_user(0, &fps->fpqd) ||
396 __put_user(0, &fps->flags) ||
397 __put_user(0, &fps->extra) ||
398 clear_user(fps->fpq, sizeof(fps->fpq)))
399 ret = -EFAULT;
400 }
401 break;
402 }
403
404 case PTRACE_SETFPREGS: {
405 ret = copy_regset_from_user(child, view, REGSET_FP,
406 0 * sizeof(u32),
407 32 * sizeof(u32),
408 &fps->regs[0]);
409 if (!ret)
410 ret = copy_regset_from_user(child, view, REGSET_FP,
411 33 * sizeof(u32),
412 1 * sizeof(u32),
413 &fps->fsr);
414 break;
415 }
416
417 case PTRACE_READTEXT:
418 case PTRACE_READDATA:
419 ret = ptrace_readdata(child, addr, addr2p, data);
420
421 if (ret == data)
422 ret = 0;
423 else if (ret >= 0)
424 ret = -EIO;
425 break;
426
427 case PTRACE_WRITETEXT:
428 case PTRACE_WRITEDATA:
429 ret = ptrace_writedata(child, addr2p, addr, data);
430
431 if (ret == data)
432 ret = 0;
433 else if (ret >= 0)
434 ret = -EIO;
435 break;
436
437 default:
438 if (request == PTRACE_SPARC_DETACH)
439 request = PTRACE_DETACH;
440 ret = ptrace_request(child, request, addr, data);
441 break;
442 }
443
444 return ret;
445 }
446
447 asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
448 {
449 int ret = 0;
450
451 if (test_thread_flag(TIF_SYSCALL_TRACE)) {
452 if (syscall_exit_p)
453 tracehook_report_syscall_exit(regs, 0);
454 else
455 ret = tracehook_report_syscall_entry(regs);
456 }
457
458 return ret;
459 }