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1/* ptrace.c: Sparc process tracing support.
2 *
3 * Copyright (C) 1996, 2008 David S. Miller (davem@davemloft.net)
4 *
5 * Based upon code written by Ross Biro, Linus Torvalds, Bob Manson,
6 * and David Mosberger.
7 *
8 * Added Linux support -miguel (weird, eh?, the original code was meant
9 * to emulate SunOS).
10 */
11
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/uaccess.h>
27#include <asm/cacheflush.h>
28
29/* #define ALLOW_INIT_TRACING */
30
31/*
32 * Called by kernel/ptrace.c when detaching..
33 *
34 * Make sure single step bits etc are not set.
35 */
36void ptrace_disable(struct task_struct *child)
37{
38 /* nothing to do */
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: /* PSR */
90 reg = regs->psr;
91 break;
92 case 33: /* PC */
93 reg = regs->pc;
94 break;
95 case 34: /* NPC */
96 reg = regs->npc;
97 break;
98 case 35: /* Y */
99 reg = regs->y;
100 break;
101 case 36: /* WIM */
102 case 37: /* TBR */
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: /* PSR */
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: /* PC */
182 regs->pc = reg;
183 break;
184 case 34: /* NPC */
185 regs->npc = reg;
186 break;
187 case 35: /* Y */
188 regs->y = reg;
189 break;
190 case 36: /* WIM */
191 case 37: /* TBR */
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 /* Format is:
286 * G0 --> G7
287 * O0 --> O7
288 * L0 --> L7
289 * I0 --> I7
290 * PSR, PC, nPC, Y, WIM, TBR
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 /* Format is:
299 * F0 --> F31
300 * empty 32-bit word
301 * FSR (32--bit word)
302 * FPU QUEUE COUNT (8-bit char)
303 * FPU QUEUE ENTRYSIZE (8-bit char)
304 * FPU ENABLED (8-bit char)
305 * empty 8-bit char
306 * FPU QUEUE (64 32-bit ints)
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}
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}