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1// SPDX-License-Identifier: GPL-2.0
2/* ptrace.c: Sparc process tracing support.
3 *
4 * Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
5 *
6 * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
7 * and David Mosberger.
8 *
9 * Added Linux support -miguel (weird, eh?, the original code was meant
10 * to emulate SunOS).
11 */
12
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/* #define ALLOW_INIT_TRACING */
33
34/*
35 * Called by kernel/ptrace.c when detaching..
36 *
37 * Make sure single step bits etc are not set.
38 */
39void ptrace_disable(struct task_struct *child)
40{
41 /* nothing to do */
42}
43
44enum sparc_regset {
45 REGSET_GENERAL,
46 REGSET_FP,
47};
48
49static 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: /* PSR */
93 reg = regs->psr;
94 break;
95 case 33: /* PC */
96 reg = regs->pc;
97 break;
98 case 34: /* NPC */
99 reg = regs->npc;
100 break;
101 case 35: /* Y */
102 reg = regs->y;
103 break;
104 case 36: /* WIM */
105 case 37: /* TBR */
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 }
119finish:
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
127static 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: /* PSR */
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: /* PC */
185 regs->pc = reg;
186 break;
187 case 34: /* NPC */
188 regs->npc = reg;
189 break;
190 case 35: /* Y */
191 regs->y = reg;
192 break;
193 case 36: /* WIM */
194 case 37: /* TBR */
195 break;
196 default:
197 goto finish;
198 }
199
200 pos++;
201 count--;
202 }
203finish:
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
211static 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
255static 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
287static const struct user_regset sparc32_regsets[] = {
288 /* Format is:
289 * G0 --> G7
290 * O0 --> O7
291 * L0 --> L7
292 * I0 --> I7
293 * PSR, PC, nPC, Y, WIM, TBR
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 },
301 /* Format is:
302 * F0 --> F31
303 * empty 32-bit word
304 * FSR (32--bit word)
305 * FPU QUEUE COUNT (8-bit char)
306 * FPU QUEUE ENTRYSIZE (8-bit char)
307 * FPU ENABLED (8-bit char)
308 * empty 8-bit char
309 * FPU QUEUE (64 32-bit ints)
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
319static 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
324const struct user_regset_view *task_user_regset_view(struct task_struct *task)
325{
326 return &user_sparc32_view;
327}
328
329struct 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
341long 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
447asmlinkage 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}
1// SPDX-License-Identifier: GPL-2.0
2/* ptrace.c: Sparc process tracing support.
3 *
4 * Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
5 *
6 * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
7 * and David Mosberger.
8 *
9 * Added Linux support -miguel (weird, eh?, the original code was meant
10 * to emulate SunOS).
11 */
12
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
25#include <linux/uaccess.h>
26#include <asm/cacheflush.h>
27
28#include "kernel.h"
29
30/* #define ALLOW_INIT_TRACING */
31
32/*
33 * Called by kernel/ptrace.c when detaching..
34 *
35 * Make sure single step bits etc are not set.
36 */
37void ptrace_disable(struct task_struct *child)
38{
39 /* nothing to do */
40}
41
42enum sparc_regset {
43 REGSET_GENERAL,
44 REGSET_FP,
45};
46
47static int regwindow32_get(struct task_struct *target,
48 const struct pt_regs *regs,
49 u32 *uregs)
50{
51 unsigned long reg_window = regs->u_regs[UREG_I6];
52 int size = 16 * sizeof(u32);
53
54 if (target == current) {
55 if (copy_from_user(uregs, (void __user *)reg_window, size))
56 return -EFAULT;
57 } else {
58 if (access_process_vm(target, reg_window, uregs, size,
59 FOLL_FORCE) != size)
60 return -EFAULT;
61 }
62 return 0;
63}
64
65static int regwindow32_set(struct task_struct *target,
66 const struct pt_regs *regs,
67 u32 *uregs)
68{
69 unsigned long reg_window = regs->u_regs[UREG_I6];
70 int size = 16 * sizeof(u32);
71
72 if (target == current) {
73 if (copy_to_user((void __user *)reg_window, uregs, size))
74 return -EFAULT;
75 } else {
76 if (access_process_vm(target, reg_window, uregs, size,
77 FOLL_FORCE | FOLL_WRITE) != size)
78 return -EFAULT;
79 }
80 return 0;
81}
82
83static int genregs32_get(struct task_struct *target,
84 const struct user_regset *regset,
85 struct membuf to)
86{
87 const struct pt_regs *regs = target->thread.kregs;
88 u32 uregs[16];
89
90 if (target == current)
91 flush_user_windows();
92
93 membuf_write(&to, regs->u_regs, 16 * sizeof(u32));
94 if (!to.left)
95 return 0;
96 if (regwindow32_get(target, regs, uregs))
97 return -EFAULT;
98 membuf_write(&to, uregs, 16 * sizeof(u32));
99 membuf_store(&to, regs->psr);
100 membuf_store(&to, regs->pc);
101 membuf_store(&to, regs->npc);
102 membuf_store(&to, regs->y);
103 return membuf_zero(&to, 2 * sizeof(u32));
104}
105
106static int genregs32_set(struct task_struct *target,
107 const struct user_regset *regset,
108 unsigned int pos, unsigned int count,
109 const void *kbuf, const void __user *ubuf)
110{
111 struct pt_regs *regs = target->thread.kregs;
112 u32 uregs[16];
113 u32 psr;
114 int ret;
115
116 if (target == current)
117 flush_user_windows();
118
119 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
120 regs->u_regs,
121 0, 16 * sizeof(u32));
122 if (ret || !count)
123 return ret;
124
125 if (regwindow32_get(target, regs, uregs))
126 return -EFAULT;
127 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
128 uregs,
129 16 * sizeof(u32), 32 * sizeof(u32));
130 if (ret)
131 return ret;
132 if (regwindow32_set(target, regs, uregs))
133 return -EFAULT;
134 if (!count)
135 return 0;
136
137 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
138 &psr,
139 32 * sizeof(u32), 33 * sizeof(u32));
140 if (ret)
141 return ret;
142 regs->psr = (regs->psr & ~(PSR_ICC | PSR_SYSCALL)) |
143 (psr & (PSR_ICC | PSR_SYSCALL));
144 if (!count)
145 return 0;
146 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
147 ®s->pc,
148 33 * sizeof(u32), 34 * sizeof(u32));
149 if (ret || !count)
150 return ret;
151 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
152 ®s->npc,
153 34 * sizeof(u32), 35 * sizeof(u32));
154 if (ret || !count)
155 return ret;
156 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
157 ®s->y,
158 35 * sizeof(u32), 36 * sizeof(u32));
159 if (ret || !count)
160 return ret;
161 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 36 * sizeof(u32),
162 38 * sizeof(u32));
163 return 0;
164}
165
166static int fpregs32_get(struct task_struct *target,
167 const struct user_regset *regset,
168 struct membuf to)
169{
170#if 0
171 if (target == current)
172 save_and_clear_fpu();
173#endif
174
175 membuf_write(&to, target->thread.float_regs, 32 * sizeof(u32));
176 membuf_zero(&to, sizeof(u32));
177 membuf_write(&to, &target->thread.fsr, sizeof(u32));
178 membuf_store(&to, (u32)((1 << 8) | (8 << 16)));
179 return membuf_zero(&to, 64 * sizeof(u32));
180}
181
182static int fpregs32_set(struct task_struct *target,
183 const struct user_regset *regset,
184 unsigned int pos, unsigned int count,
185 const void *kbuf, const void __user *ubuf)
186{
187 unsigned long *fpregs = target->thread.float_regs;
188 int ret;
189
190#if 0
191 if (target == current)
192 save_and_clear_fpu();
193#endif
194 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
195 fpregs,
196 0, 32 * sizeof(u32));
197 if (!ret)
198 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
199 32 * sizeof(u32),
200 33 * sizeof(u32));
201 if (!ret)
202 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
203 &target->thread.fsr,
204 33 * sizeof(u32),
205 34 * sizeof(u32));
206 if (!ret)
207 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
208 34 * sizeof(u32), -1);
209 return ret;
210}
211
212static const struct user_regset sparc32_regsets[] = {
213 /* Format is:
214 * G0 --> G7
215 * O0 --> O7
216 * L0 --> L7
217 * I0 --> I7
218 * PSR, PC, nPC, Y, WIM, TBR
219 */
220 [REGSET_GENERAL] = {
221 .core_note_type = NT_PRSTATUS,
222 .n = 38,
223 .size = sizeof(u32), .align = sizeof(u32),
224 .regset_get = genregs32_get, .set = genregs32_set
225 },
226 /* Format is:
227 * F0 --> F31
228 * empty 32-bit word
229 * FSR (32--bit word)
230 * FPU QUEUE COUNT (8-bit char)
231 * FPU QUEUE ENTRYSIZE (8-bit char)
232 * FPU ENABLED (8-bit char)
233 * empty 8-bit char
234 * FPU QUEUE (64 32-bit ints)
235 */
236 [REGSET_FP] = {
237 .core_note_type = NT_PRFPREG,
238 .n = 99,
239 .size = sizeof(u32), .align = sizeof(u32),
240 .regset_get = fpregs32_get, .set = fpregs32_set
241 },
242};
243
244static int getregs_get(struct task_struct *target,
245 const struct user_regset *regset,
246 struct membuf to)
247{
248 const struct pt_regs *regs = target->thread.kregs;
249
250 if (target == current)
251 flush_user_windows();
252
253 membuf_store(&to, regs->psr);
254 membuf_store(&to, regs->pc);
255 membuf_store(&to, regs->npc);
256 membuf_store(&to, regs->y);
257 return membuf_write(&to, regs->u_regs + 1, 15 * sizeof(u32));
258}
259
260static int setregs_set(struct task_struct *target,
261 const struct user_regset *regset,
262 unsigned int pos, unsigned int count,
263 const void *kbuf, const void __user *ubuf)
264{
265 struct pt_regs *regs = target->thread.kregs;
266 u32 v[4];
267 int ret;
268
269 if (target == current)
270 flush_user_windows();
271
272 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
273 v,
274 0, 4 * sizeof(u32));
275 if (ret)
276 return ret;
277 regs->psr = (regs->psr & ~(PSR_ICC | PSR_SYSCALL)) |
278 (v[0] & (PSR_ICC | PSR_SYSCALL));
279 regs->pc = v[1];
280 regs->npc = v[2];
281 regs->y = v[3];
282 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
283 regs->u_regs + 1,
284 4 * sizeof(u32) , 19 * sizeof(u32));
285}
286
287static int getfpregs_get(struct task_struct *target,
288 const struct user_regset *regset,
289 struct membuf to)
290{
291#if 0
292 if (target == current)
293 save_and_clear_fpu();
294#endif
295 membuf_write(&to, &target->thread.float_regs, 32 * sizeof(u32));
296 membuf_write(&to, &target->thread.fsr, sizeof(u32));
297 return membuf_zero(&to, 35 * sizeof(u32));
298}
299
300static int setfpregs_set(struct task_struct *target,
301 const struct user_regset *regset,
302 unsigned int pos, unsigned int count,
303 const void *kbuf, const void __user *ubuf)
304{
305 unsigned long *fpregs = target->thread.float_regs;
306 int ret;
307
308#if 0
309 if (target == current)
310 save_and_clear_fpu();
311#endif
312 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
313 fpregs,
314 0, 32 * sizeof(u32));
315 if (ret)
316 return ret;
317 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
318 &target->thread.fsr,
319 32 * sizeof(u32),
320 33 * sizeof(u32));
321}
322
323static const struct user_regset ptrace32_regsets[] = {
324 [REGSET_GENERAL] = {
325 .n = 19, .size = sizeof(u32),
326 .regset_get = getregs_get, .set = setregs_set,
327 },
328 [REGSET_FP] = {
329 .n = 68, .size = sizeof(u32),
330 .regset_get = getfpregs_get, .set = setfpregs_set,
331 },
332};
333
334static const struct user_regset_view ptrace32_view = {
335 .regsets = ptrace32_regsets, .n = ARRAY_SIZE(ptrace32_regsets)
336};
337
338static const struct user_regset_view user_sparc32_view = {
339 .name = "sparc", .e_machine = EM_SPARC,
340 .regsets = sparc32_regsets, .n = ARRAY_SIZE(sparc32_regsets)
341};
342
343const struct user_regset_view *task_user_regset_view(struct task_struct *task)
344{
345 return &user_sparc32_view;
346}
347
348struct fps {
349 unsigned long regs[32];
350 unsigned long fsr;
351 unsigned long flags;
352 unsigned long extra;
353 unsigned long fpqd;
354 struct fq {
355 unsigned long *insnaddr;
356 unsigned long insn;
357 } fpq[16];
358};
359
360long arch_ptrace(struct task_struct *child, long request,
361 unsigned long addr, unsigned long data)
362{
363 unsigned long addr2 = current->thread.kregs->u_regs[UREG_I4];
364 void __user *addr2p;
365 struct pt_regs __user *pregs;
366 struct fps __user *fps;
367 int ret;
368
369 addr2p = (void __user *) addr2;
370 pregs = (struct pt_regs __user *) addr;
371 fps = (struct fps __user *) addr;
372
373 switch(request) {
374 case PTRACE_GETREGS: {
375 ret = copy_regset_to_user(child, &ptrace32_view,
376 REGSET_GENERAL, 0,
377 19 * sizeof(u32),
378 pregs);
379 break;
380 }
381
382 case PTRACE_SETREGS: {
383 ret = copy_regset_from_user(child, &ptrace32_view,
384 REGSET_GENERAL, 0,
385 19 * sizeof(u32),
386 pregs);
387 break;
388 }
389
390 case PTRACE_GETFPREGS: {
391 ret = copy_regset_to_user(child, &ptrace32_view,
392 REGSET_FP, 0,
393 68 * sizeof(u32),
394 fps);
395 break;
396 }
397
398 case PTRACE_SETFPREGS: {
399 ret = copy_regset_from_user(child, &ptrace32_view,
400 REGSET_FP, 0,
401 33 * sizeof(u32),
402 fps);
403 break;
404 }
405
406 case PTRACE_READTEXT:
407 case PTRACE_READDATA:
408 ret = ptrace_readdata(child, addr, addr2p, data);
409
410 if (ret == data)
411 ret = 0;
412 else if (ret >= 0)
413 ret = -EIO;
414 break;
415
416 case PTRACE_WRITETEXT:
417 case PTRACE_WRITEDATA:
418 ret = ptrace_writedata(child, addr2p, addr, data);
419
420 if (ret == data)
421 ret = 0;
422 else if (ret >= 0)
423 ret = -EIO;
424 break;
425
426 default:
427 if (request == PTRACE_SPARC_DETACH)
428 request = PTRACE_DETACH;
429 ret = ptrace_request(child, request, addr, data);
430 break;
431 }
432
433 return ret;
434}
435
436asmlinkage int syscall_trace(struct pt_regs *regs, int syscall_exit_p)
437{
438 int ret = 0;
439
440 if (test_thread_flag(TIF_SYSCALL_TRACE)) {
441 if (syscall_exit_p)
442 ptrace_report_syscall_exit(regs, 0);
443 else
444 ret = ptrace_report_syscall_entry(regs);
445 }
446
447 return ret;
448}