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12#include <linux/kernel.h>
13#include <linux/sched.h>
14#include <linux/mm.h>
15#include <linux/errno.h>
16#include <linux/ptrace.h>
17#include <linux/user.h>
18#include <linux/smp.h>
19#include <linux/security.h>
20#include <linux/signal.h>
21#include <linux/regset.h>
22#include <linux/elf.h>
23#include <linux/tracehook.h>
24
25#include <asm/pgtable.h>
26#include <asm/system.h>
27#include <asm/uaccess.h>
28
29
30
31
32
33
34
35
36void ptrace_disable(struct task_struct *child)
37{
38
39}
40
41enum sparc_regset {
42 REGSET_GENERAL,
43 REGSET_FP,
44};
45
46static int genregs32_get(struct task_struct *target,
47 const struct user_regset *regset,
48 unsigned int pos, unsigned int count,
49 void *kbuf, void __user *ubuf)
50{
51 const struct pt_regs *regs = target->thread.kregs;
52 unsigned long __user *reg_window;
53 unsigned long *k = kbuf;
54 unsigned long __user *u = ubuf;
55 unsigned long reg;
56
57 if (target == current)
58 flush_user_windows();
59
60 pos /= sizeof(reg);
61 count /= sizeof(reg);
62
63 if (kbuf) {
64 for (; count > 0 && pos < 16; count--)
65 *k++ = regs->u_regs[pos++];
66
67 reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
68 reg_window -= 16;
69 for (; count > 0 && pos < 32; count--) {
70 if (get_user(*k++, ®_window[pos++]))
71 return -EFAULT;
72 }
73 } else {
74 for (; count > 0 && pos < 16; count--) {
75 if (put_user(regs->u_regs[pos++], u++))
76 return -EFAULT;
77 }
78
79 reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
80 reg_window -= 16;
81 for (; count > 0 && pos < 32; count--) {
82 if (get_user(reg, ®_window[pos++]) ||
83 put_user(reg, u++))
84 return -EFAULT;
85 }
86 }
87 while (count > 0) {
88 switch (pos) {
89 case 32:
90 reg = regs->psr;
91 break;
92 case 33:
93 reg = regs->pc;
94 break;
95 case 34:
96 reg = regs->npc;
97 break;
98 case 35:
99 reg = regs->y;
100 break;
101 case 36:
102 case 37:
103 reg = 0;
104 break;
105 default:
106 goto finish;
107 }
108
109 if (kbuf)
110 *k++ = reg;
111 else if (put_user(reg, u++))
112 return -EFAULT;
113 pos++;
114 count--;
115 }
116finish:
117 pos *= sizeof(reg);
118 count *= sizeof(reg);
119
120 return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
121 38 * sizeof(reg), -1);
122}
123
124static int genregs32_set(struct task_struct *target,
125 const struct user_regset *regset,
126 unsigned int pos, unsigned int count,
127 const void *kbuf, const void __user *ubuf)
128{
129 struct pt_regs *regs = target->thread.kregs;
130 unsigned long __user *reg_window;
131 const unsigned long *k = kbuf;
132 const unsigned long __user *u = ubuf;
133 unsigned long reg;
134
135 if (target == current)
136 flush_user_windows();
137
138 pos /= sizeof(reg);
139 count /= sizeof(reg);
140
141 if (kbuf) {
142 for (; count > 0 && pos < 16; count--)
143 regs->u_regs[pos++] = *k++;
144
145 reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
146 reg_window -= 16;
147 for (; count > 0 && pos < 32; count--) {
148 if (put_user(*k++, ®_window[pos++]))
149 return -EFAULT;
150 }
151 } else {
152 for (; count > 0 && pos < 16; count--) {
153 if (get_user(reg, u++))
154 return -EFAULT;
155 regs->u_regs[pos++] = reg;
156 }
157
158 reg_window = (unsigned long __user *) regs->u_regs[UREG_I6];
159 reg_window -= 16;
160 for (; count > 0 && pos < 32; count--) {
161 if (get_user(reg, u++) ||
162 put_user(reg, ®_window[pos++]))
163 return -EFAULT;
164 }
165 }
166 while (count > 0) {
167 unsigned long psr;
168
169 if (kbuf)
170 reg = *k++;
171 else if (get_user(reg, u++))
172 return -EFAULT;
173
174 switch (pos) {
175 case 32:
176 psr = regs->psr;
177 psr &= ~(PSR_ICC | PSR_SYSCALL);
178 psr |= (reg & (PSR_ICC | PSR_SYSCALL));
179 regs->psr = psr;
180 break;
181 case 33:
182 regs->pc = reg;
183 break;
184 case 34:
185 regs->npc = reg;
186 break;
187 case 35:
188 regs->y = reg;
189 break;
190 case 36:
191 case 37:
192 break;
193 default:
194 goto finish;
195 }
196
197 pos++;
198 count--;
199 }
200finish:
201 pos *= sizeof(reg);
202 count *= sizeof(reg);
203
204 return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
205 38 * sizeof(reg), -1);
206}
207
208static int fpregs32_get(struct task_struct *target,
209 const struct user_regset *regset,
210 unsigned int pos, unsigned int count,
211 void *kbuf, void __user *ubuf)
212{
213 const unsigned long *fpregs = target->thread.float_regs;
214 int ret = 0;
215
216#if 0
217 if (target == current)
218 save_and_clear_fpu();
219#endif
220
221 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
222 fpregs,
223 0, 32 * sizeof(u32));
224
225 if (!ret)
226 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
227 32 * sizeof(u32),
228 33 * sizeof(u32));
229 if (!ret)
230 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
231 &target->thread.fsr,
232 33 * sizeof(u32),
233 34 * sizeof(u32));
234
235 if (!ret) {
236 unsigned long val;
237
238 val = (1 << 8) | (8 << 16);
239 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
240 &val,
241 34 * sizeof(u32),
242 35 * sizeof(u32));
243 }
244
245 if (!ret)
246 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
247 35 * sizeof(u32), -1);
248
249 return ret;
250}
251
252static int fpregs32_set(struct task_struct *target,
253 const struct user_regset *regset,
254 unsigned int pos, unsigned int count,
255 const void *kbuf, const void __user *ubuf)
256{
257 unsigned long *fpregs = target->thread.float_regs;
258 int ret;
259
260#if 0
261 if (target == current)
262 save_and_clear_fpu();
263#endif
264 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
265 fpregs,
266 0, 32 * sizeof(u32));
267 if (!ret)
268 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
269 32 * sizeof(u32),
270 33 * sizeof(u32));
271 if (!ret && count > 0) {
272 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
273 &target->thread.fsr,
274 33 * sizeof(u32),
275 34 * sizeof(u32));
276 }
277
278 if (!ret)
279 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
280 34 * sizeof(u32), -1);
281 return ret;
282}
283
284static const struct user_regset sparc32_regsets[] = {
285
286
287
288
289
290
291
292 [REGSET_GENERAL] = {
293 .core_note_type = NT_PRSTATUS,
294 .n = 38,
295 .size = sizeof(u32), .align = sizeof(u32),
296 .get = genregs32_get, .set = genregs32_set
297 },
298
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303
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306
307
308 [REGSET_FP] = {
309 .core_note_type = NT_PRFPREG,
310 .n = 99,
311 .size = sizeof(u32), .align = sizeof(u32),
312 .get = fpregs32_get, .set = fpregs32_set
313 },
314};
315
316static const struct user_regset_view user_sparc32_view = {
317 .name = "sparc", .e_machine = EM_SPARC,
318 .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
319};
320
321const struct user_regset_view *task_user_regset_view(struct task_struct *task)
322{
323 return &user_sparc32_view;
324}
325
326struct fps {
327 unsigned long regs[32];
328 unsigned long fsr;
329 unsigned long flags;
330 unsigned long extra;
331 unsigned long fpqd;
332 struct fq {
333 unsigned long *insnaddr;
334 unsigned long insn;
335 } fpq[16];
336};
337
338long arch_ptrace(struct task_struct *child, long request,
339 unsigned long addr, unsigned long data)
340{
341 unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
342 void __user *addr2p;
343 const struct user_regset_view *view;
344 struct pt_regs __user *pregs;
345 struct fps __user *fps;
346 int ret;
347
348 view = task_user_regset_view(current);
349 addr2p = (void __user *) addr2;
350 pregs = (struct pt_regs __user *) addr;
351 fps = (struct fps __user *) addr;
352
353 switch(request) {
354 case PTRACE_GETREGS: {
355 ret = copy_regset_to_user(child, view, REGSET_GENERAL,
356 32 * sizeof(u32),
357 4 * sizeof(u32),
358 &pregs->psr);
359 if (!ret)
360 copy_regset_to_user(child, view, REGSET_GENERAL,
361 1 * sizeof(u32),
362 15 * sizeof(u32),
363 &pregs->u_regs[0]);
364 break;
365 }
366
367 case PTRACE_SETREGS: {
368 ret = copy_regset_from_user(child, view, REGSET_GENERAL,
369 32 * sizeof(u32),
370 4 * sizeof(u32),
371 &pregs->psr);
372 if (!ret)
373 copy_regset_from_user(child, view, REGSET_GENERAL,
374 1 * sizeof(u32),
375 15 * sizeof(u32),
376 &pregs->u_regs[0]);
377 break;
378 }
379
380 case PTRACE_GETFPREGS: {
381 ret = copy_regset_to_user(child, view, REGSET_FP,
382 0 * sizeof(u32),
383 32 * sizeof(u32),
384 &fps->regs[0]);
385 if (!ret)
386 ret = copy_regset_to_user(child, view, REGSET_FP,
387 33 * sizeof(u32),
388 1 * sizeof(u32),
389 &fps->fsr);
390
391 if (!ret) {
392 if (__put_user(0, &fps->fpqd) ||
393 __put_user(0, &fps->flags) ||
394 __put_user(0, &fps->extra) ||
395 clear_user(fps->fpq, sizeof(fps->fpq)))
396 ret = -EFAULT;
397 }
398 break;
399 }
400
401 case PTRACE_SETFPREGS: {
402 ret = copy_regset_from_user(child, view, REGSET_FP,
403 0 * sizeof(u32),
404 32 * sizeof(u32),
405 &fps->regs[0]);
406 if (!ret)
407 ret = copy_regset_from_user(child, view, REGSET_FP,
408 33 * sizeof(u32),
409 1 * sizeof(u32),
410 &fps->fsr);
411 break;
412 }
413
414 case PTRACE_READTEXT:
415 case PTRACE_READDATA:
416 ret = ptrace_readdata(child, addr, addr2p, data);
417
418 if (ret == data)
419 ret = 0;
420 else if (ret >= 0)
421 ret = -EIO;
422 break;
423
424 case PTRACE_WRITETEXT:
425 case PTRACE_WRITEDATA:
426 ret = ptrace_writedata(child, addr2p, addr, data);
427
428 if (ret == data)
429 ret = 0;
430 else if (ret >= 0)
431 ret = -EIO;
432 break;
433
434 default:
435 if (request == PTRACE_SPARC_DETACH)
436 request = PTRACE_DETACH;
437 ret = ptrace_request(child, request, addr, data);
438 break;
439 }
440
441 return ret;
442}
443
444asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
445{
446 int ret = 0;
447
448 if (test_thread_flag(TIF_SYSCALL_TRACE)) {
449 if (syscall_exit_p)
450 tracehook_report_syscall_exit(regs, 0);
451 else
452 ret = tracehook_report_syscall_entry(regs);
453 }
454
455 return ret;
456}
457
