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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * SuperH process tracing
4 *
5 * Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
6 * Copyright (C) 2002 - 2009 Paul Mundt
7 *
8 * Audit support by Yuichi Nakamura <ynakam@hitachisoft.jp>
9 */
10#include <linux/kernel.h>
11#include <linux/sched.h>
12#include <linux/sched/task_stack.h>
13#include <linux/mm.h>
14#include <linux/smp.h>
15#include <linux/errno.h>
16#include <linux/ptrace.h>
17#include <linux/user.h>
18#include <linux/security.h>
19#include <linux/signal.h>
20#include <linux/io.h>
21#include <linux/audit.h>
22#include <linux/seccomp.h>
23#include <linux/tracehook.h>
24#include <linux/elf.h>
25#include <linux/regset.h>
26#include <linux/hw_breakpoint.h>
27#include <linux/uaccess.h>
28#include <asm/pgtable.h>
29#include <asm/processor.h>
30#include <asm/mmu_context.h>
31#include <asm/syscalls.h>
32#include <asm/fpu.h>
33
34#define CREATE_TRACE_POINTS
35#include <trace/events/syscalls.h>
36
37/*
38 * This routine will get a word off of the process kernel stack.
39 */
40static inline int get_stack_long(struct task_struct *task, int offset)
41{
42 unsigned char *stack;
43
44 stack = (unsigned char *)task_pt_regs(task);
45 stack += offset;
46 return (*((int *)stack));
47}
48
49/*
50 * This routine will put a word on the process kernel stack.
51 */
52static inline int put_stack_long(struct task_struct *task, int offset,
53 unsigned long data)
54{
55 unsigned char *stack;
56
57 stack = (unsigned char *)task_pt_regs(task);
58 stack += offset;
59 *(unsigned long *) stack = data;
60 return 0;
61}
62
63void ptrace_triggered(struct perf_event *bp,
64 struct perf_sample_data *data, struct pt_regs *regs)
65{
66 struct perf_event_attr attr;
67
68 /*
69 * Disable the breakpoint request here since ptrace has defined a
70 * one-shot behaviour for breakpoint exceptions.
71 */
72 attr = bp->attr;
73 attr.disabled = true;
74 modify_user_hw_breakpoint(bp, &attr);
75}
76
77static int set_single_step(struct task_struct *tsk, unsigned long addr)
78{
79 struct thread_struct *thread = &tsk->thread;
80 struct perf_event *bp;
81 struct perf_event_attr attr;
82
83 bp = thread->ptrace_bps[0];
84 if (!bp) {
85 ptrace_breakpoint_init(&attr);
86
87 attr.bp_addr = addr;
88 attr.bp_len = HW_BREAKPOINT_LEN_2;
89 attr.bp_type = HW_BREAKPOINT_R;
90
91 bp = register_user_hw_breakpoint(&attr, ptrace_triggered,
92 NULL, tsk);
93 if (IS_ERR(bp))
94 return PTR_ERR(bp);
95
96 thread->ptrace_bps[0] = bp;
97 } else {
98 int err;
99
100 attr = bp->attr;
101 attr.bp_addr = addr;
102 /* reenable breakpoint */
103 attr.disabled = false;
104 err = modify_user_hw_breakpoint(bp, &attr);
105 if (unlikely(err))
106 return err;
107 }
108
109 return 0;
110}
111
112void user_enable_single_step(struct task_struct *child)
113{
114 unsigned long pc = get_stack_long(child, offsetof(struct pt_regs, pc));
115
116 set_tsk_thread_flag(child, TIF_SINGLESTEP);
117
118 set_single_step(child, pc);
119}
120
121void user_disable_single_step(struct task_struct *child)
122{
123 clear_tsk_thread_flag(child, TIF_SINGLESTEP);
124}
125
126/*
127 * Called by kernel/ptrace.c when detaching..
128 *
129 * Make sure single step bits etc are not set.
130 */
131void ptrace_disable(struct task_struct *child)
132{
133 user_disable_single_step(child);
134}
135
136static int genregs_get(struct task_struct *target,
137 const struct user_regset *regset,
138 unsigned int pos, unsigned int count,
139 void *kbuf, void __user *ubuf)
140{
141 const struct pt_regs *regs = task_pt_regs(target);
142 int ret;
143
144 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
145 regs->regs,
146 0, 16 * sizeof(unsigned long));
147 if (!ret)
148 /* PC, PR, SR, GBR, MACH, MACL, TRA */
149 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
150 ®s->pc,
151 offsetof(struct pt_regs, pc),
152 sizeof(struct pt_regs));
153 if (!ret)
154 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
155 sizeof(struct pt_regs), -1);
156
157 return ret;
158}
159
160static int genregs_set(struct task_struct *target,
161 const struct user_regset *regset,
162 unsigned int pos, unsigned int count,
163 const void *kbuf, const void __user *ubuf)
164{
165 struct pt_regs *regs = task_pt_regs(target);
166 int ret;
167
168 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
169 regs->regs,
170 0, 16 * sizeof(unsigned long));
171 if (!ret && count > 0)
172 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
173 ®s->pc,
174 offsetof(struct pt_regs, pc),
175 sizeof(struct pt_regs));
176 if (!ret)
177 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
178 sizeof(struct pt_regs), -1);
179
180 return ret;
181}
182
183#ifdef CONFIG_SH_FPU
184int fpregs_get(struct task_struct *target,
185 const struct user_regset *regset,
186 unsigned int pos, unsigned int count,
187 void *kbuf, void __user *ubuf)
188{
189 int ret;
190
191 ret = init_fpu(target);
192 if (ret)
193 return ret;
194
195 if ((boot_cpu_data.flags & CPU_HAS_FPU))
196 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
197 &target->thread.xstate->hardfpu, 0, -1);
198
199 return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
200 &target->thread.xstate->softfpu, 0, -1);
201}
202
203static int fpregs_set(struct task_struct *target,
204 const struct user_regset *regset,
205 unsigned int pos, unsigned int count,
206 const void *kbuf, const void __user *ubuf)
207{
208 int ret;
209
210 ret = init_fpu(target);
211 if (ret)
212 return ret;
213
214 set_stopped_child_used_math(target);
215
216 if ((boot_cpu_data.flags & CPU_HAS_FPU))
217 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
218 &target->thread.xstate->hardfpu, 0, -1);
219
220 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
221 &target->thread.xstate->softfpu, 0, -1);
222}
223
224static int fpregs_active(struct task_struct *target,
225 const struct user_regset *regset)
226{
227 return tsk_used_math(target) ? regset->n : 0;
228}
229#endif
230
231#ifdef CONFIG_SH_DSP
232static int dspregs_get(struct task_struct *target,
233 const struct user_regset *regset,
234 unsigned int pos, unsigned int count,
235 void *kbuf, void __user *ubuf)
236{
237 const struct pt_dspregs *regs =
238 (struct pt_dspregs *)&target->thread.dsp_status.dsp_regs;
239 int ret;
240
241 ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, regs,
242 0, sizeof(struct pt_dspregs));
243 if (!ret)
244 ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
245 sizeof(struct pt_dspregs), -1);
246
247 return ret;
248}
249
250static int dspregs_set(struct task_struct *target,
251 const struct user_regset *regset,
252 unsigned int pos, unsigned int count,
253 const void *kbuf, const void __user *ubuf)
254{
255 struct pt_dspregs *regs =
256 (struct pt_dspregs *)&target->thread.dsp_status.dsp_regs;
257 int ret;
258
259 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, regs,
260 0, sizeof(struct pt_dspregs));
261 if (!ret)
262 ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
263 sizeof(struct pt_dspregs), -1);
264
265 return ret;
266}
267
268static int dspregs_active(struct task_struct *target,
269 const struct user_regset *regset)
270{
271 struct pt_regs *regs = task_pt_regs(target);
272
273 return regs->sr & SR_DSP ? regset->n : 0;
274}
275#endif
276
277const struct pt_regs_offset regoffset_table[] = {
278 REGS_OFFSET_NAME(0),
279 REGS_OFFSET_NAME(1),
280 REGS_OFFSET_NAME(2),
281 REGS_OFFSET_NAME(3),
282 REGS_OFFSET_NAME(4),
283 REGS_OFFSET_NAME(5),
284 REGS_OFFSET_NAME(6),
285 REGS_OFFSET_NAME(7),
286 REGS_OFFSET_NAME(8),
287 REGS_OFFSET_NAME(9),
288 REGS_OFFSET_NAME(10),
289 REGS_OFFSET_NAME(11),
290 REGS_OFFSET_NAME(12),
291 REGS_OFFSET_NAME(13),
292 REGS_OFFSET_NAME(14),
293 REGS_OFFSET_NAME(15),
294 REG_OFFSET_NAME(pc),
295 REG_OFFSET_NAME(pr),
296 REG_OFFSET_NAME(sr),
297 REG_OFFSET_NAME(gbr),
298 REG_OFFSET_NAME(mach),
299 REG_OFFSET_NAME(macl),
300 REG_OFFSET_NAME(tra),
301 REG_OFFSET_END,
302};
303
304/*
305 * These are our native regset flavours.
306 */
307enum sh_regset {
308 REGSET_GENERAL,
309#ifdef CONFIG_SH_FPU
310 REGSET_FPU,
311#endif
312#ifdef CONFIG_SH_DSP
313 REGSET_DSP,
314#endif
315};
316
317static const struct user_regset sh_regsets[] = {
318 /*
319 * Format is:
320 * R0 --> R15
321 * PC, PR, SR, GBR, MACH, MACL, TRA
322 */
323 [REGSET_GENERAL] = {
324 .core_note_type = NT_PRSTATUS,
325 .n = ELF_NGREG,
326 .size = sizeof(long),
327 .align = sizeof(long),
328 .get = genregs_get,
329 .set = genregs_set,
330 },
331
332#ifdef CONFIG_SH_FPU
333 [REGSET_FPU] = {
334 .core_note_type = NT_PRFPREG,
335 .n = sizeof(struct user_fpu_struct) / sizeof(long),
336 .size = sizeof(long),
337 .align = sizeof(long),
338 .get = fpregs_get,
339 .set = fpregs_set,
340 .active = fpregs_active,
341 },
342#endif
343
344#ifdef CONFIG_SH_DSP
345 [REGSET_DSP] = {
346 .n = sizeof(struct pt_dspregs) / sizeof(long),
347 .size = sizeof(long),
348 .align = sizeof(long),
349 .get = dspregs_get,
350 .set = dspregs_set,
351 .active = dspregs_active,
352 },
353#endif
354};
355
356static const struct user_regset_view user_sh_native_view = {
357 .name = "sh",
358 .e_machine = EM_SH,
359 .regsets = sh_regsets,
360 .n = ARRAY_SIZE(sh_regsets),
361};
362
363const struct user_regset_view *task_user_regset_view(struct task_struct *task)
364{
365 return &user_sh_native_view;
366}
367
368long arch_ptrace(struct task_struct *child, long request,
369 unsigned long addr, unsigned long data)
370{
371 unsigned long __user *datap = (unsigned long __user *)data;
372 int ret;
373
374 switch (request) {
375 /* read the word at location addr in the USER area. */
376 case PTRACE_PEEKUSR: {
377 unsigned long tmp;
378
379 ret = -EIO;
380 if ((addr & 3) || addr < 0 ||
381 addr > sizeof(struct user) - 3)
382 break;
383
384 if (addr < sizeof(struct pt_regs))
385 tmp = get_stack_long(child, addr);
386 else if (addr >= offsetof(struct user, fpu) &&
387 addr < offsetof(struct user, u_fpvalid)) {
388 if (!tsk_used_math(child)) {
389 if (addr == offsetof(struct user, fpu.fpscr))
390 tmp = FPSCR_INIT;
391 else
392 tmp = 0;
393 } else {
394 unsigned long index;
395 ret = init_fpu(child);
396 if (ret)
397 break;
398 index = addr - offsetof(struct user, fpu);
399 tmp = ((unsigned long *)child->thread.xstate)
400 [index >> 2];
401 }
402 } else if (addr == offsetof(struct user, u_fpvalid))
403 tmp = !!tsk_used_math(child);
404 else if (addr == PT_TEXT_ADDR)
405 tmp = child->mm->start_code;
406 else if (addr == PT_DATA_ADDR)
407 tmp = child->mm->start_data;
408 else if (addr == PT_TEXT_END_ADDR)
409 tmp = child->mm->end_code;
410 else if (addr == PT_TEXT_LEN)
411 tmp = child->mm->end_code - child->mm->start_code;
412 else
413 tmp = 0;
414 ret = put_user(tmp, datap);
415 break;
416 }
417
418 case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
419 ret = -EIO;
420 if ((addr & 3) || addr < 0 ||
421 addr > sizeof(struct user) - 3)
422 break;
423
424 if (addr < sizeof(struct pt_regs))
425 ret = put_stack_long(child, addr, data);
426 else if (addr >= offsetof(struct user, fpu) &&
427 addr < offsetof(struct user, u_fpvalid)) {
428 unsigned long index;
429 ret = init_fpu(child);
430 if (ret)
431 break;
432 index = addr - offsetof(struct user, fpu);
433 set_stopped_child_used_math(child);
434 ((unsigned long *)child->thread.xstate)
435 [index >> 2] = data;
436 ret = 0;
437 } else if (addr == offsetof(struct user, u_fpvalid)) {
438 conditional_stopped_child_used_math(data, child);
439 ret = 0;
440 }
441 break;
442
443 case PTRACE_GETREGS:
444 return copy_regset_to_user(child, &user_sh_native_view,
445 REGSET_GENERAL,
446 0, sizeof(struct pt_regs),
447 datap);
448 case PTRACE_SETREGS:
449 return copy_regset_from_user(child, &user_sh_native_view,
450 REGSET_GENERAL,
451 0, sizeof(struct pt_regs),
452 datap);
453#ifdef CONFIG_SH_FPU
454 case PTRACE_GETFPREGS:
455 return copy_regset_to_user(child, &user_sh_native_view,
456 REGSET_FPU,
457 0, sizeof(struct user_fpu_struct),
458 datap);
459 case PTRACE_SETFPREGS:
460 return copy_regset_from_user(child, &user_sh_native_view,
461 REGSET_FPU,
462 0, sizeof(struct user_fpu_struct),
463 datap);
464#endif
465#ifdef CONFIG_SH_DSP
466 case PTRACE_GETDSPREGS:
467 return copy_regset_to_user(child, &user_sh_native_view,
468 REGSET_DSP,
469 0, sizeof(struct pt_dspregs),
470 datap);
471 case PTRACE_SETDSPREGS:
472 return copy_regset_from_user(child, &user_sh_native_view,
473 REGSET_DSP,
474 0, sizeof(struct pt_dspregs),
475 datap);
476#endif
477 default:
478 ret = ptrace_request(child, request, addr, data);
479 break;
480 }
481
482 return ret;
483}
484
485asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
486{
487 long ret = 0;
488
489 secure_computing_strict(regs->regs[0]);
490
491 if (test_thread_flag(TIF_SYSCALL_TRACE) &&
492 tracehook_report_syscall_entry(regs))
493 /*
494 * Tracing decided this syscall should not happen.
495 * We'll return a bogus call number to get an ENOSYS
496 * error, but leave the original number in regs->regs[0].
497 */
498 ret = -1L;
499
500 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
501 trace_sys_enter(regs, regs->regs[0]);
502
503 audit_syscall_entry(regs->regs[3], regs->regs[4], regs->regs[5],
504 regs->regs[6], regs->regs[7]);
505
506 return ret ?: regs->regs[0];
507}
508
509asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
510{
511 int step;
512
513 audit_syscall_exit(regs);
514
515 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
516 trace_sys_exit(regs, regs->regs[0]);
517
518 step = test_thread_flag(TIF_SINGLESTEP);
519 if (step || test_thread_flag(TIF_SYSCALL_TRACE))
520 tracehook_report_syscall_exit(regs, step);
521}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * SuperH process tracing
4 *
5 * Copyright (C) 1999, 2000 Kaz Kojima & Niibe Yutaka
6 * Copyright (C) 2002 - 2009 Paul Mundt
7 *
8 * Audit support by Yuichi Nakamura <ynakam@hitachisoft.jp>
9 */
10#include <linux/kernel.h>
11#include <linux/sched.h>
12#include <linux/sched/task_stack.h>
13#include <linux/mm.h>
14#include <linux/smp.h>
15#include <linux/errno.h>
16#include <linux/ptrace.h>
17#include <linux/user.h>
18#include <linux/security.h>
19#include <linux/signal.h>
20#include <linux/io.h>
21#include <linux/audit.h>
22#include <linux/seccomp.h>
23#include <linux/elf.h>
24#include <linux/regset.h>
25#include <linux/hw_breakpoint.h>
26#include <linux/uaccess.h>
27#include <asm/processor.h>
28#include <asm/mmu_context.h>
29#include <asm/syscalls.h>
30#include <asm/fpu.h>
31
32#define CREATE_TRACE_POINTS
33#include <trace/events/syscalls.h>
34
35/*
36 * This routine will get a word off of the process kernel stack.
37 */
38static inline int get_stack_long(struct task_struct *task, int offset)
39{
40 unsigned char *stack;
41
42 stack = (unsigned char *)task_pt_regs(task);
43 stack += offset;
44 return (*((int *)stack));
45}
46
47/*
48 * This routine will put a word on the process kernel stack.
49 */
50static inline int put_stack_long(struct task_struct *task, int offset,
51 unsigned long data)
52{
53 unsigned char *stack;
54
55 stack = (unsigned char *)task_pt_regs(task);
56 stack += offset;
57 *(unsigned long *) stack = data;
58 return 0;
59}
60
61void ptrace_triggered(struct perf_event *bp,
62 struct perf_sample_data *data, struct pt_regs *regs)
63{
64 struct perf_event_attr attr;
65
66 /*
67 * Disable the breakpoint request here since ptrace has defined a
68 * one-shot behaviour for breakpoint exceptions.
69 */
70 attr = bp->attr;
71 attr.disabled = true;
72 modify_user_hw_breakpoint(bp, &attr);
73}
74
75static int set_single_step(struct task_struct *tsk, unsigned long addr)
76{
77 struct thread_struct *thread = &tsk->thread;
78 struct perf_event *bp;
79 struct perf_event_attr attr;
80
81 bp = thread->ptrace_bps[0];
82 if (!bp) {
83 ptrace_breakpoint_init(&attr);
84
85 attr.bp_addr = addr;
86 attr.bp_len = HW_BREAKPOINT_LEN_2;
87 attr.bp_type = HW_BREAKPOINT_R;
88
89 bp = register_user_hw_breakpoint(&attr, ptrace_triggered,
90 NULL, tsk);
91 if (IS_ERR(bp))
92 return PTR_ERR(bp);
93
94 thread->ptrace_bps[0] = bp;
95 } else {
96 int err;
97
98 attr = bp->attr;
99 attr.bp_addr = addr;
100 /* reenable breakpoint */
101 attr.disabled = false;
102 err = modify_user_hw_breakpoint(bp, &attr);
103 if (unlikely(err))
104 return err;
105 }
106
107 return 0;
108}
109
110void user_enable_single_step(struct task_struct *child)
111{
112 unsigned long pc = get_stack_long(child, offsetof(struct pt_regs, pc));
113
114 set_tsk_thread_flag(child, TIF_SINGLESTEP);
115
116 set_single_step(child, pc);
117}
118
119void user_disable_single_step(struct task_struct *child)
120{
121 clear_tsk_thread_flag(child, TIF_SINGLESTEP);
122}
123
124/*
125 * Called by kernel/ptrace.c when detaching..
126 *
127 * Make sure single step bits etc are not set.
128 */
129void ptrace_disable(struct task_struct *child)
130{
131 user_disable_single_step(child);
132}
133
134static int genregs_get(struct task_struct *target,
135 const struct user_regset *regset,
136 struct membuf to)
137{
138 const struct pt_regs *regs = task_pt_regs(target);
139
140 return membuf_write(&to, regs, sizeof(struct pt_regs));
141}
142
143static int genregs_set(struct task_struct *target,
144 const struct user_regset *regset,
145 unsigned int pos, unsigned int count,
146 const void *kbuf, const void __user *ubuf)
147{
148 struct pt_regs *regs = task_pt_regs(target);
149 int ret;
150
151 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
152 regs->regs,
153 0, 16 * sizeof(unsigned long));
154 if (!ret && count > 0)
155 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
156 ®s->pc,
157 offsetof(struct pt_regs, pc),
158 sizeof(struct pt_regs));
159 if (!ret)
160 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
161 sizeof(struct pt_regs), -1);
162
163 return ret;
164}
165
166#ifdef CONFIG_SH_FPU
167static int fpregs_get(struct task_struct *target,
168 const struct user_regset *regset,
169 struct membuf to)
170{
171 int ret;
172
173 ret = init_fpu(target);
174 if (ret)
175 return ret;
176
177 return membuf_write(&to, target->thread.xstate,
178 sizeof(struct user_fpu_struct));
179}
180
181static int fpregs_set(struct task_struct *target,
182 const struct user_regset *regset,
183 unsigned int pos, unsigned int count,
184 const void *kbuf, const void __user *ubuf)
185{
186 int ret;
187
188 ret = init_fpu(target);
189 if (ret)
190 return ret;
191
192 set_stopped_child_used_math(target);
193
194 if ((boot_cpu_data.flags & CPU_HAS_FPU))
195 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
196 &target->thread.xstate->hardfpu, 0, -1);
197
198 return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
199 &target->thread.xstate->softfpu, 0, -1);
200}
201
202static int fpregs_active(struct task_struct *target,
203 const struct user_regset *regset)
204{
205 return tsk_used_math(target) ? regset->n : 0;
206}
207#endif
208
209#ifdef CONFIG_SH_DSP
210static int dspregs_get(struct task_struct *target,
211 const struct user_regset *regset,
212 struct membuf to)
213{
214 const struct pt_dspregs *regs =
215 (struct pt_dspregs *)&target->thread.dsp_status.dsp_regs;
216
217 return membuf_write(&to, regs, sizeof(struct pt_dspregs));
218}
219
220static int dspregs_set(struct task_struct *target,
221 const struct user_regset *regset,
222 unsigned int pos, unsigned int count,
223 const void *kbuf, const void __user *ubuf)
224{
225 struct pt_dspregs *regs =
226 (struct pt_dspregs *)&target->thread.dsp_status.dsp_regs;
227 int ret;
228
229 ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, regs,
230 0, sizeof(struct pt_dspregs));
231 if (!ret)
232 user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
233 sizeof(struct pt_dspregs), -1);
234
235 return ret;
236}
237
238static int dspregs_active(struct task_struct *target,
239 const struct user_regset *regset)
240{
241 struct pt_regs *regs = task_pt_regs(target);
242
243 return regs->sr & SR_DSP ? regset->n : 0;
244}
245#endif
246
247const struct pt_regs_offset regoffset_table[] = {
248 REGS_OFFSET_NAME(0),
249 REGS_OFFSET_NAME(1),
250 REGS_OFFSET_NAME(2),
251 REGS_OFFSET_NAME(3),
252 REGS_OFFSET_NAME(4),
253 REGS_OFFSET_NAME(5),
254 REGS_OFFSET_NAME(6),
255 REGS_OFFSET_NAME(7),
256 REGS_OFFSET_NAME(8),
257 REGS_OFFSET_NAME(9),
258 REGS_OFFSET_NAME(10),
259 REGS_OFFSET_NAME(11),
260 REGS_OFFSET_NAME(12),
261 REGS_OFFSET_NAME(13),
262 REGS_OFFSET_NAME(14),
263 REGS_OFFSET_NAME(15),
264 REG_OFFSET_NAME(pc),
265 REG_OFFSET_NAME(pr),
266 REG_OFFSET_NAME(sr),
267 REG_OFFSET_NAME(gbr),
268 REG_OFFSET_NAME(mach),
269 REG_OFFSET_NAME(macl),
270 REG_OFFSET_NAME(tra),
271 REG_OFFSET_END,
272};
273
274/*
275 * These are our native regset flavours.
276 */
277enum sh_regset {
278 REGSET_GENERAL,
279#ifdef CONFIG_SH_FPU
280 REGSET_FPU,
281#endif
282#ifdef CONFIG_SH_DSP
283 REGSET_DSP,
284#endif
285};
286
287static const struct user_regset sh_regsets[] = {
288 /*
289 * Format is:
290 * R0 --> R15
291 * PC, PR, SR, GBR, MACH, MACL, TRA
292 */
293 [REGSET_GENERAL] = {
294 .core_note_type = NT_PRSTATUS,
295 .n = ELF_NGREG,
296 .size = sizeof(long),
297 .align = sizeof(long),
298 .regset_get = genregs_get,
299 .set = genregs_set,
300 },
301
302#ifdef CONFIG_SH_FPU
303 [REGSET_FPU] = {
304 .core_note_type = NT_PRFPREG,
305 .n = sizeof(struct user_fpu_struct) / sizeof(long),
306 .size = sizeof(long),
307 .align = sizeof(long),
308 .regset_get = fpregs_get,
309 .set = fpregs_set,
310 .active = fpregs_active,
311 },
312#endif
313
314#ifdef CONFIG_SH_DSP
315 [REGSET_DSP] = {
316 .n = sizeof(struct pt_dspregs) / sizeof(long),
317 .size = sizeof(long),
318 .align = sizeof(long),
319 .regset_get = dspregs_get,
320 .set = dspregs_set,
321 .active = dspregs_active,
322 },
323#endif
324};
325
326static const struct user_regset_view user_sh_native_view = {
327 .name = "sh",
328 .e_machine = EM_SH,
329 .regsets = sh_regsets,
330 .n = ARRAY_SIZE(sh_regsets),
331};
332
333const struct user_regset_view *task_user_regset_view(struct task_struct *task)
334{
335 return &user_sh_native_view;
336}
337
338long arch_ptrace(struct task_struct *child, long request,
339 unsigned long addr, unsigned long data)
340{
341 unsigned long __user *datap = (unsigned long __user *)data;
342 int ret;
343
344 switch (request) {
345 /* read the word at location addr in the USER area. */
346 case PTRACE_PEEKUSR: {
347 unsigned long tmp;
348
349 ret = -EIO;
350 if ((addr & 3) || addr < 0 ||
351 addr > sizeof(struct user) - 3)
352 break;
353
354 if (addr < sizeof(struct pt_regs))
355 tmp = get_stack_long(child, addr);
356 else if (addr >= offsetof(struct user, fpu) &&
357 addr < offsetof(struct user, u_fpvalid)) {
358 if (!tsk_used_math(child)) {
359 if (addr == offsetof(struct user, fpu.fpscr))
360 tmp = FPSCR_INIT;
361 else
362 tmp = 0;
363 } else {
364 unsigned long index;
365 ret = init_fpu(child);
366 if (ret)
367 break;
368 index = addr - offsetof(struct user, fpu);
369 tmp = ((unsigned long *)child->thread.xstate)
370 [index >> 2];
371 }
372 } else if (addr == offsetof(struct user, u_fpvalid))
373 tmp = !!tsk_used_math(child);
374 else if (addr == PT_TEXT_ADDR)
375 tmp = child->mm->start_code;
376 else if (addr == PT_DATA_ADDR)
377 tmp = child->mm->start_data;
378 else if (addr == PT_TEXT_END_ADDR)
379 tmp = child->mm->end_code;
380 else if (addr == PT_TEXT_LEN)
381 tmp = child->mm->end_code - child->mm->start_code;
382 else
383 tmp = 0;
384 ret = put_user(tmp, datap);
385 break;
386 }
387
388 case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
389 ret = -EIO;
390 if ((addr & 3) || addr < 0 ||
391 addr > sizeof(struct user) - 3)
392 break;
393
394 if (addr < sizeof(struct pt_regs))
395 ret = put_stack_long(child, addr, data);
396 else if (addr >= offsetof(struct user, fpu) &&
397 addr < offsetof(struct user, u_fpvalid)) {
398 unsigned long index;
399 ret = init_fpu(child);
400 if (ret)
401 break;
402 index = addr - offsetof(struct user, fpu);
403 set_stopped_child_used_math(child);
404 ((unsigned long *)child->thread.xstate)
405 [index >> 2] = data;
406 ret = 0;
407 } else if (addr == offsetof(struct user, u_fpvalid)) {
408 conditional_stopped_child_used_math(data, child);
409 ret = 0;
410 }
411 break;
412
413 case PTRACE_GETREGS:
414 return copy_regset_to_user(child, &user_sh_native_view,
415 REGSET_GENERAL,
416 0, sizeof(struct pt_regs),
417 datap);
418 case PTRACE_SETREGS:
419 return copy_regset_from_user(child, &user_sh_native_view,
420 REGSET_GENERAL,
421 0, sizeof(struct pt_regs),
422 datap);
423#ifdef CONFIG_SH_FPU
424 case PTRACE_GETFPREGS:
425 return copy_regset_to_user(child, &user_sh_native_view,
426 REGSET_FPU,
427 0, sizeof(struct user_fpu_struct),
428 datap);
429 case PTRACE_SETFPREGS:
430 return copy_regset_from_user(child, &user_sh_native_view,
431 REGSET_FPU,
432 0, sizeof(struct user_fpu_struct),
433 datap);
434#endif
435#ifdef CONFIG_SH_DSP
436 case PTRACE_GETDSPREGS:
437 return copy_regset_to_user(child, &user_sh_native_view,
438 REGSET_DSP,
439 0, sizeof(struct pt_dspregs),
440 datap);
441 case PTRACE_SETDSPREGS:
442 return copy_regset_from_user(child, &user_sh_native_view,
443 REGSET_DSP,
444 0, sizeof(struct pt_dspregs),
445 datap);
446#endif
447 default:
448 ret = ptrace_request(child, request, addr, data);
449 break;
450 }
451
452 return ret;
453}
454
455asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
456{
457 if (test_thread_flag(TIF_SYSCALL_TRACE) &&
458 ptrace_report_syscall_entry(regs)) {
459 regs->regs[0] = -ENOSYS;
460 return -1;
461 }
462
463 if (secure_computing() == -1)
464 return -1;
465
466 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
467 trace_sys_enter(regs, regs->regs[0]);
468
469 audit_syscall_entry(regs->regs[3], regs->regs[4], regs->regs[5],
470 regs->regs[6], regs->regs[7]);
471
472 return 0;
473}
474
475asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
476{
477 int step;
478
479 audit_syscall_exit(regs);
480
481 if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
482 trace_sys_exit(regs, regs->regs[0]);
483
484 step = test_thread_flag(TIF_SINGLESTEP);
485 if (step || test_thread_flag(TIF_SYSCALL_TRACE))
486 ptrace_report_syscall_exit(regs, step);
487}