Commit | Line | Data |
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1da177e4 LT |
1 | /* ptrace.c: Sparc process tracing support. |
2 | * | |
3 | * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu) | |
4 | * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
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/smp_lock.h> | |
21 | #include <linux/security.h> | |
f7ceba36 DM |
22 | #include <linux/seccomp.h> |
23 | #include <linux/audit.h> | |
7ed20e1a | 24 | #include <linux/signal.h> |
1da177e4 LT |
25 | |
26 | #include <asm/asi.h> | |
27 | #include <asm/pgtable.h> | |
28 | #include <asm/system.h> | |
29 | #include <asm/uaccess.h> | |
30 | #include <asm/psrcompat.h> | |
31 | #include <asm/visasm.h> | |
32 | #include <asm/spitfire.h> | |
6a9b490d | 33 | #include <asm/page.h> |
717463d8 | 34 | #include <asm/cpudata.h> |
1da177e4 LT |
35 | |
36 | /* Returning from ptrace is a bit tricky because the syscall return | |
37 | * low level code assumes any value returned which is negative and | |
38 | * is a valid errno will mean setting the condition codes to indicate | |
39 | * an error return. This doesn't work, so we have this hook. | |
40 | */ | |
41 | static inline void pt_error_return(struct pt_regs *regs, unsigned long error) | |
42 | { | |
43 | regs->u_regs[UREG_I0] = error; | |
44 | regs->tstate |= (TSTATE_ICARRY | TSTATE_XCARRY); | |
45 | regs->tpc = regs->tnpc; | |
46 | regs->tnpc += 4; | |
47 | } | |
48 | ||
49 | static inline void pt_succ_return(struct pt_regs *regs, unsigned long value) | |
50 | { | |
51 | regs->u_regs[UREG_I0] = value; | |
52 | regs->tstate &= ~(TSTATE_ICARRY | TSTATE_XCARRY); | |
53 | regs->tpc = regs->tnpc; | |
54 | regs->tnpc += 4; | |
55 | } | |
56 | ||
57 | static inline void | |
58 | pt_succ_return_linux(struct pt_regs *regs, unsigned long value, void __user *addr) | |
59 | { | |
60 | if (test_thread_flag(TIF_32BIT)) { | |
61 | if (put_user(value, (unsigned int __user *) addr)) { | |
62 | pt_error_return(regs, EFAULT); | |
63 | return; | |
64 | } | |
65 | } else { | |
66 | if (put_user(value, (long __user *) addr)) { | |
67 | pt_error_return(regs, EFAULT); | |
68 | return; | |
69 | } | |
70 | } | |
71 | regs->u_regs[UREG_I0] = 0; | |
72 | regs->tstate &= ~(TSTATE_ICARRY | TSTATE_XCARRY); | |
73 | regs->tpc = regs->tnpc; | |
74 | regs->tnpc += 4; | |
75 | } | |
76 | ||
77 | static void | |
78 | pt_os_succ_return (struct pt_regs *regs, unsigned long val, void __user *addr) | |
79 | { | |
80 | if (current->personality == PER_SUNOS) | |
81 | pt_succ_return (regs, val); | |
82 | else | |
83 | pt_succ_return_linux (regs, val, addr); | |
84 | } | |
85 | ||
86 | /* #define ALLOW_INIT_TRACING */ | |
87 | /* #define DEBUG_PTRACE */ | |
88 | ||
89 | #ifdef DEBUG_PTRACE | |
90 | char *pt_rq [] = { | |
91 | /* 0 */ "TRACEME", "PEEKTEXT", "PEEKDATA", "PEEKUSR", | |
92 | /* 4 */ "POKETEXT", "POKEDATA", "POKEUSR", "CONT", | |
93 | /* 8 */ "KILL", "SINGLESTEP", "SUNATTACH", "SUNDETACH", | |
94 | /* 12 */ "GETREGS", "SETREGS", "GETFPREGS", "SETFPREGS", | |
95 | /* 16 */ "READDATA", "WRITEDATA", "READTEXT", "WRITETEXT", | |
96 | /* 20 */ "GETFPAREGS", "SETFPAREGS", "unknown", "unknown", | |
97 | /* 24 */ "SYSCALL", "" | |
98 | }; | |
99 | #endif | |
100 | ||
101 | /* | |
102 | * Called by kernel/ptrace.c when detaching.. | |
103 | * | |
104 | * Make sure single step bits etc are not set. | |
105 | */ | |
106 | void ptrace_disable(struct task_struct *child) | |
107 | { | |
108 | /* nothing to do */ | |
109 | } | |
110 | ||
dadeafdf DM |
111 | /* To get the necessary page struct, access_process_vm() first calls |
112 | * get_user_pages(). This has done a flush_dcache_page() on the | |
113 | * accessed page. Then our caller (copy_{to,from}_user_page()) did | |
114 | * to memcpy to read/write the data from that page. | |
115 | * | |
116 | * Now, the only thing we have to do is: | |
117 | * 1) flush the D-cache if it's possible than an illegal alias | |
118 | * has been created | |
119 | * 2) flush the I-cache if this is pre-cheetah and we did a write | |
120 | */ | |
121 | void flush_ptrace_access(struct vm_area_struct *vma, struct page *page, | |
122 | unsigned long uaddr, void *kaddr, | |
123 | unsigned long len, int write) | |
124 | { | |
125 | BUG_ON(len > PAGE_SIZE); | |
126 | ||
7adb37fe DM |
127 | if (tlb_type == hypervisor) |
128 | return; | |
129 | ||
dadeafdf DM |
130 | #ifdef DCACHE_ALIASING_POSSIBLE |
131 | /* If bit 13 of the kernel address we used to access the | |
132 | * user page is the same as the virtual address that page | |
133 | * is mapped to in the user's address space, we can skip the | |
134 | * D-cache flush. | |
135 | */ | |
6a9b490d | 136 | if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) { |
dadeafdf DM |
137 | unsigned long start = __pa(kaddr); |
138 | unsigned long end = start + len; | |
717463d8 DM |
139 | unsigned long dcache_line_size; |
140 | ||
141 | dcache_line_size = local_cpu_data().dcache_line_size; | |
dadeafdf DM |
142 | |
143 | if (tlb_type == spitfire) { | |
717463d8 | 144 | for (; start < end; start += dcache_line_size) |
6a9b490d | 145 | spitfire_put_dcache_tag(start & 0x3fe0, 0x0); |
dadeafdf | 146 | } else { |
717463d8 DM |
147 | start &= ~(dcache_line_size - 1); |
148 | for (; start < end; start += dcache_line_size) | |
dadeafdf DM |
149 | __asm__ __volatile__( |
150 | "stxa %%g0, [%0] %1\n\t" | |
151 | "membar #Sync" | |
152 | : /* no outputs */ | |
6a9b490d | 153 | : "r" (start), |
dadeafdf DM |
154 | "i" (ASI_DCACHE_INVALIDATE)); |
155 | } | |
156 | } | |
157 | #endif | |
158 | if (write && tlb_type == spitfire) { | |
159 | unsigned long start = (unsigned long) kaddr; | |
160 | unsigned long end = start + len; | |
717463d8 DM |
161 | unsigned long icache_line_size; |
162 | ||
163 | icache_line_size = local_cpu_data().icache_line_size; | |
dadeafdf | 164 | |
717463d8 | 165 | for (; start < end; start += icache_line_size) |
dadeafdf DM |
166 | flushi(start); |
167 | } | |
168 | } | |
169 | ||
1da177e4 LT |
170 | asmlinkage void do_ptrace(struct pt_regs *regs) |
171 | { | |
172 | int request = regs->u_regs[UREG_I0]; | |
173 | pid_t pid = regs->u_regs[UREG_I1]; | |
174 | unsigned long addr = regs->u_regs[UREG_I2]; | |
175 | unsigned long data = regs->u_regs[UREG_I3]; | |
176 | unsigned long addr2 = regs->u_regs[UREG_I4]; | |
177 | struct task_struct *child; | |
178 | int ret; | |
179 | ||
180 | if (test_thread_flag(TIF_32BIT)) { | |
181 | addr &= 0xffffffffUL; | |
182 | data &= 0xffffffffUL; | |
183 | addr2 &= 0xffffffffUL; | |
184 | } | |
185 | lock_kernel(); | |
186 | #ifdef DEBUG_PTRACE | |
187 | { | |
188 | char *s; | |
189 | ||
190 | if ((request >= 0) && (request <= 24)) | |
191 | s = pt_rq [request]; | |
192 | else | |
193 | s = "unknown"; | |
194 | ||
195 | if (request == PTRACE_POKEDATA && data == 0x91d02001){ | |
196 | printk ("do_ptrace: breakpoint pid=%d, addr=%016lx addr2=%016lx\n", | |
197 | pid, addr, addr2); | |
198 | } else | |
199 | printk("do_ptrace: rq=%s(%d) pid=%d addr=%016lx data=%016lx addr2=%016lx\n", | |
200 | s, request, pid, addr, data, addr2); | |
201 | } | |
202 | #endif | |
203 | if (request == PTRACE_TRACEME) { | |
6b9c7ed8 | 204 | ret = ptrace_traceme(); |
1da177e4 LT |
205 | pt_succ_return(regs, 0); |
206 | goto out; | |
207 | } | |
6b9c7ed8 CH |
208 | |
209 | child = ptrace_get_task_struct(pid); | |
210 | if (IS_ERR(child)) { | |
211 | ret = PTR_ERR(child); | |
212 | pt_error_return(regs, -ret); | |
1da177e4 LT |
213 | goto out; |
214 | } | |
215 | ||
216 | if ((current->personality == PER_SUNOS && request == PTRACE_SUNATTACH) | |
217 | || (current->personality != PER_SUNOS && request == PTRACE_ATTACH)) { | |
218 | if (ptrace_attach(child)) { | |
219 | pt_error_return(regs, EPERM); | |
220 | goto out_tsk; | |
221 | } | |
222 | pt_succ_return(regs, 0); | |
223 | goto out_tsk; | |
224 | } | |
225 | ||
226 | ret = ptrace_check_attach(child, request == PTRACE_KILL); | |
227 | if (ret < 0) { | |
228 | pt_error_return(regs, -ret); | |
229 | goto out_tsk; | |
230 | } | |
231 | ||
232 | if (!(test_thread_flag(TIF_32BIT)) && | |
233 | ((request == PTRACE_READDATA64) || | |
234 | (request == PTRACE_WRITEDATA64) || | |
235 | (request == PTRACE_READTEXT64) || | |
236 | (request == PTRACE_WRITETEXT64) || | |
237 | (request == PTRACE_PEEKTEXT64) || | |
238 | (request == PTRACE_POKETEXT64) || | |
239 | (request == PTRACE_PEEKDATA64) || | |
240 | (request == PTRACE_POKEDATA64))) { | |
241 | addr = regs->u_regs[UREG_G2]; | |
242 | addr2 = regs->u_regs[UREG_G3]; | |
243 | request -= 30; /* wheee... */ | |
244 | } | |
245 | ||
246 | switch(request) { | |
1759e58e DM |
247 | case PTRACE_PEEKUSR: |
248 | if (addr != 0) | |
249 | pt_error_return(regs, EIO); | |
250 | else | |
251 | pt_succ_return(regs, 0); | |
252 | goto out_tsk; | |
253 | ||
1da177e4 LT |
254 | case PTRACE_PEEKTEXT: /* read word at location addr. */ |
255 | case PTRACE_PEEKDATA: { | |
256 | unsigned long tmp64; | |
257 | unsigned int tmp32; | |
258 | int res, copied; | |
259 | ||
260 | res = -EIO; | |
261 | if (test_thread_flag(TIF_32BIT)) { | |
262 | copied = access_process_vm(child, addr, | |
263 | &tmp32, sizeof(tmp32), 0); | |
264 | tmp64 = (unsigned long) tmp32; | |
265 | if (copied == sizeof(tmp32)) | |
266 | res = 0; | |
267 | } else { | |
268 | copied = access_process_vm(child, addr, | |
269 | &tmp64, sizeof(tmp64), 0); | |
270 | if (copied == sizeof(tmp64)) | |
271 | res = 0; | |
272 | } | |
273 | if (res < 0) | |
274 | pt_error_return(regs, -res); | |
275 | else | |
276 | pt_os_succ_return(regs, tmp64, (void __user *) data); | |
dadeafdf | 277 | goto out_tsk; |
1da177e4 LT |
278 | } |
279 | ||
280 | case PTRACE_POKETEXT: /* write the word at location addr. */ | |
281 | case PTRACE_POKEDATA: { | |
282 | unsigned long tmp64; | |
283 | unsigned int tmp32; | |
284 | int copied, res = -EIO; | |
285 | ||
286 | if (test_thread_flag(TIF_32BIT)) { | |
287 | tmp32 = data; | |
288 | copied = access_process_vm(child, addr, | |
289 | &tmp32, sizeof(tmp32), 1); | |
290 | if (copied == sizeof(tmp32)) | |
291 | res = 0; | |
292 | } else { | |
293 | tmp64 = data; | |
294 | copied = access_process_vm(child, addr, | |
295 | &tmp64, sizeof(tmp64), 1); | |
296 | if (copied == sizeof(tmp64)) | |
297 | res = 0; | |
298 | } | |
299 | if (res < 0) | |
300 | pt_error_return(regs, -res); | |
301 | else | |
302 | pt_succ_return(regs, res); | |
dadeafdf | 303 | goto out_tsk; |
1da177e4 LT |
304 | } |
305 | ||
306 | case PTRACE_GETREGS: { | |
307 | struct pt_regs32 __user *pregs = | |
308 | (struct pt_regs32 __user *) addr; | |
26ecbdea | 309 | struct pt_regs *cregs = task_pt_regs(child); |
1da177e4 LT |
310 | int rval; |
311 | ||
312 | if (__put_user(tstate_to_psr(cregs->tstate), (&pregs->psr)) || | |
313 | __put_user(cregs->tpc, (&pregs->pc)) || | |
314 | __put_user(cregs->tnpc, (&pregs->npc)) || | |
315 | __put_user(cregs->y, (&pregs->y))) { | |
316 | pt_error_return(regs, EFAULT); | |
317 | goto out_tsk; | |
318 | } | |
319 | for (rval = 1; rval < 16; rval++) | |
320 | if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) { | |
321 | pt_error_return(regs, EFAULT); | |
322 | goto out_tsk; | |
323 | } | |
324 | pt_succ_return(regs, 0); | |
325 | #ifdef DEBUG_PTRACE | |
326 | printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]); | |
327 | #endif | |
328 | goto out_tsk; | |
329 | } | |
330 | ||
331 | case PTRACE_GETREGS64: { | |
332 | struct pt_regs __user *pregs = (struct pt_regs __user *) addr; | |
26ecbdea | 333 | struct pt_regs *cregs = task_pt_regs(child); |
1da177e4 LT |
334 | unsigned long tpc = cregs->tpc; |
335 | int rval; | |
336 | ||
f3169641 | 337 | if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) |
1da177e4 LT |
338 | tpc &= 0xffffffff; |
339 | if (__put_user(cregs->tstate, (&pregs->tstate)) || | |
340 | __put_user(tpc, (&pregs->tpc)) || | |
341 | __put_user(cregs->tnpc, (&pregs->tnpc)) || | |
342 | __put_user(cregs->y, (&pregs->y))) { | |
343 | pt_error_return(regs, EFAULT); | |
344 | goto out_tsk; | |
345 | } | |
346 | for (rval = 1; rval < 16; rval++) | |
347 | if (__put_user(cregs->u_regs[rval], (&pregs->u_regs[rval - 1]))) { | |
348 | pt_error_return(regs, EFAULT); | |
349 | goto out_tsk; | |
350 | } | |
351 | pt_succ_return(regs, 0); | |
352 | #ifdef DEBUG_PTRACE | |
353 | printk ("PC=%lx nPC=%lx o7=%lx\n", cregs->tpc, cregs->tnpc, cregs->u_regs [15]); | |
354 | #endif | |
355 | goto out_tsk; | |
356 | } | |
357 | ||
358 | case PTRACE_SETREGS: { | |
359 | struct pt_regs32 __user *pregs = | |
360 | (struct pt_regs32 __user *) addr; | |
26ecbdea | 361 | struct pt_regs *cregs = task_pt_regs(child); |
1da177e4 LT |
362 | unsigned int psr, pc, npc, y; |
363 | int i; | |
364 | ||
365 | /* Must be careful, tracing process can only set certain | |
366 | * bits in the psr. | |
367 | */ | |
368 | if (__get_user(psr, (&pregs->psr)) || | |
369 | __get_user(pc, (&pregs->pc)) || | |
370 | __get_user(npc, (&pregs->npc)) || | |
371 | __get_user(y, (&pregs->y))) { | |
372 | pt_error_return(regs, EFAULT); | |
373 | goto out_tsk; | |
374 | } | |
375 | cregs->tstate &= ~(TSTATE_ICC); | |
376 | cregs->tstate |= psr_to_tstate_icc(psr); | |
377 | if (!((pc | npc) & 3)) { | |
378 | cregs->tpc = pc; | |
379 | cregs->tnpc = npc; | |
380 | } | |
381 | cregs->y = y; | |
382 | for (i = 1; i < 16; i++) { | |
383 | if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) { | |
384 | pt_error_return(regs, EFAULT); | |
385 | goto out_tsk; | |
386 | } | |
387 | } | |
388 | pt_succ_return(regs, 0); | |
389 | goto out_tsk; | |
390 | } | |
391 | ||
392 | case PTRACE_SETREGS64: { | |
393 | struct pt_regs __user *pregs = (struct pt_regs __user *) addr; | |
26ecbdea | 394 | struct pt_regs *cregs = task_pt_regs(child); |
1da177e4 LT |
395 | unsigned long tstate, tpc, tnpc, y; |
396 | int i; | |
397 | ||
398 | /* Must be careful, tracing process can only set certain | |
399 | * bits in the psr. | |
400 | */ | |
401 | if (__get_user(tstate, (&pregs->tstate)) || | |
402 | __get_user(tpc, (&pregs->tpc)) || | |
403 | __get_user(tnpc, (&pregs->tnpc)) || | |
404 | __get_user(y, (&pregs->y))) { | |
405 | pt_error_return(regs, EFAULT); | |
406 | goto out_tsk; | |
407 | } | |
f3169641 | 408 | if ((task_thread_info(child)->flags & _TIF_32BIT) != 0) { |
1da177e4 LT |
409 | tpc &= 0xffffffff; |
410 | tnpc &= 0xffffffff; | |
411 | } | |
412 | tstate &= (TSTATE_ICC | TSTATE_XCC); | |
413 | cregs->tstate &= ~(TSTATE_ICC | TSTATE_XCC); | |
414 | cregs->tstate |= tstate; | |
415 | if (!((tpc | tnpc) & 3)) { | |
416 | cregs->tpc = tpc; | |
417 | cregs->tnpc = tnpc; | |
418 | } | |
419 | cregs->y = y; | |
420 | for (i = 1; i < 16; i++) { | |
421 | if (__get_user(cregs->u_regs[i], (&pregs->u_regs[i-1]))) { | |
422 | pt_error_return(regs, EFAULT); | |
423 | goto out_tsk; | |
424 | } | |
425 | } | |
426 | pt_succ_return(regs, 0); | |
427 | goto out_tsk; | |
428 | } | |
429 | ||
430 | case PTRACE_GETFPREGS: { | |
431 | struct fps { | |
432 | unsigned int regs[32]; | |
433 | unsigned int fsr; | |
434 | unsigned int flags; | |
435 | unsigned int extra; | |
436 | unsigned int fpqd; | |
437 | struct fq { | |
438 | unsigned int insnaddr; | |
439 | unsigned int insn; | |
440 | } fpq[16]; | |
441 | }; | |
442 | struct fps __user *fps = (struct fps __user *) addr; | |
f3169641 | 443 | unsigned long *fpregs = task_thread_info(child)->fpregs; |
1da177e4 LT |
444 | |
445 | if (copy_to_user(&fps->regs[0], fpregs, | |
446 | (32 * sizeof(unsigned int))) || | |
f3169641 | 447 | __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr)) || |
1da177e4 LT |
448 | __put_user(0, (&fps->fpqd)) || |
449 | __put_user(0, (&fps->flags)) || | |
450 | __put_user(0, (&fps->extra)) || | |
451 | clear_user(&fps->fpq[0], 32 * sizeof(unsigned int))) { | |
452 | pt_error_return(regs, EFAULT); | |
453 | goto out_tsk; | |
454 | } | |
455 | pt_succ_return(regs, 0); | |
456 | goto out_tsk; | |
457 | } | |
458 | ||
459 | case PTRACE_GETFPREGS64: { | |
460 | struct fps { | |
461 | unsigned int regs[64]; | |
462 | unsigned long fsr; | |
463 | }; | |
464 | struct fps __user *fps = (struct fps __user *) addr; | |
f3169641 | 465 | unsigned long *fpregs = task_thread_info(child)->fpregs; |
1da177e4 LT |
466 | |
467 | if (copy_to_user(&fps->regs[0], fpregs, | |
468 | (64 * sizeof(unsigned int))) || | |
f3169641 | 469 | __put_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) { |
1da177e4 LT |
470 | pt_error_return(regs, EFAULT); |
471 | goto out_tsk; | |
472 | } | |
473 | pt_succ_return(regs, 0); | |
474 | goto out_tsk; | |
475 | } | |
476 | ||
477 | case PTRACE_SETFPREGS: { | |
478 | struct fps { | |
479 | unsigned int regs[32]; | |
480 | unsigned int fsr; | |
481 | unsigned int flags; | |
482 | unsigned int extra; | |
483 | unsigned int fpqd; | |
484 | struct fq { | |
485 | unsigned int insnaddr; | |
486 | unsigned int insn; | |
487 | } fpq[16]; | |
488 | }; | |
489 | struct fps __user *fps = (struct fps __user *) addr; | |
f3169641 | 490 | unsigned long *fpregs = task_thread_info(child)->fpregs; |
1da177e4 LT |
491 | unsigned fsr; |
492 | ||
493 | if (copy_from_user(fpregs, &fps->regs[0], | |
494 | (32 * sizeof(unsigned int))) || | |
495 | __get_user(fsr, (&fps->fsr))) { | |
496 | pt_error_return(regs, EFAULT); | |
497 | goto out_tsk; | |
498 | } | |
f3169641 AV |
499 | task_thread_info(child)->xfsr[0] &= 0xffffffff00000000UL; |
500 | task_thread_info(child)->xfsr[0] |= fsr; | |
501 | if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF)) | |
502 | task_thread_info(child)->gsr[0] = 0; | |
503 | task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL); | |
1da177e4 LT |
504 | pt_succ_return(regs, 0); |
505 | goto out_tsk; | |
506 | } | |
507 | ||
508 | case PTRACE_SETFPREGS64: { | |
509 | struct fps { | |
510 | unsigned int regs[64]; | |
511 | unsigned long fsr; | |
512 | }; | |
513 | struct fps __user *fps = (struct fps __user *) addr; | |
f3169641 | 514 | unsigned long *fpregs = task_thread_info(child)->fpregs; |
1da177e4 LT |
515 | |
516 | if (copy_from_user(fpregs, &fps->regs[0], | |
517 | (64 * sizeof(unsigned int))) || | |
f3169641 | 518 | __get_user(task_thread_info(child)->xfsr[0], (&fps->fsr))) { |
1da177e4 LT |
519 | pt_error_return(regs, EFAULT); |
520 | goto out_tsk; | |
521 | } | |
f3169641 AV |
522 | if (!(task_thread_info(child)->fpsaved[0] & FPRS_FEF)) |
523 | task_thread_info(child)->gsr[0] = 0; | |
524 | task_thread_info(child)->fpsaved[0] |= (FPRS_FEF | FPRS_DL | FPRS_DU); | |
1da177e4 LT |
525 | pt_succ_return(regs, 0); |
526 | goto out_tsk; | |
527 | } | |
528 | ||
529 | case PTRACE_READTEXT: | |
530 | case PTRACE_READDATA: { | |
531 | int res = ptrace_readdata(child, addr, | |
532 | (char __user *)addr2, data); | |
533 | if (res == data) { | |
534 | pt_succ_return(regs, 0); | |
dadeafdf | 535 | goto out_tsk; |
1da177e4 LT |
536 | } |
537 | if (res >= 0) | |
538 | res = -EIO; | |
539 | pt_error_return(regs, -res); | |
dadeafdf | 540 | goto out_tsk; |
1da177e4 LT |
541 | } |
542 | ||
543 | case PTRACE_WRITETEXT: | |
544 | case PTRACE_WRITEDATA: { | |
545 | int res = ptrace_writedata(child, (char __user *) addr2, | |
546 | addr, data); | |
547 | if (res == data) { | |
548 | pt_succ_return(regs, 0); | |
dadeafdf | 549 | goto out_tsk; |
1da177e4 LT |
550 | } |
551 | if (res >= 0) | |
552 | res = -EIO; | |
553 | pt_error_return(regs, -res); | |
dadeafdf | 554 | goto out_tsk; |
1da177e4 LT |
555 | } |
556 | case PTRACE_SYSCALL: /* continue and stop at (return from) syscall */ | |
557 | addr = 1; | |
558 | ||
559 | case PTRACE_CONT: { /* restart after signal. */ | |
7ed20e1a | 560 | if (!valid_signal(data)) { |
1da177e4 LT |
561 | pt_error_return(regs, EIO); |
562 | goto out_tsk; | |
563 | } | |
1da177e4 LT |
564 | |
565 | if (request == PTRACE_SYSCALL) { | |
566 | set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); | |
567 | } else { | |
568 | clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); | |
569 | } | |
570 | ||
571 | child->exit_code = data; | |
572 | #ifdef DEBUG_PTRACE | |
573 | printk("CONT: %s [%d]: set exit_code = %x %lx %lx\n", child->comm, | |
574 | child->pid, child->exit_code, | |
26ecbdea AV |
575 | task_pt_regs(child)->tpc, |
576 | task_pt_regs(child)->tnpc); | |
1da177e4 LT |
577 | |
578 | #endif | |
579 | wake_up_process(child); | |
580 | pt_succ_return(regs, 0); | |
581 | goto out_tsk; | |
582 | } | |
583 | ||
584 | /* | |
585 | * make the child exit. Best I can do is send it a sigkill. | |
586 | * perhaps it should be put in the status that it wants to | |
587 | * exit. | |
588 | */ | |
589 | case PTRACE_KILL: { | |
590 | if (child->exit_state == EXIT_ZOMBIE) { /* already dead */ | |
591 | pt_succ_return(regs, 0); | |
592 | goto out_tsk; | |
593 | } | |
594 | child->exit_code = SIGKILL; | |
595 | wake_up_process(child); | |
596 | pt_succ_return(regs, 0); | |
597 | goto out_tsk; | |
598 | } | |
599 | ||
600 | case PTRACE_SUNDETACH: { /* detach a process that was attached. */ | |
601 | int error = ptrace_detach(child, data); | |
602 | if (error) { | |
603 | pt_error_return(regs, EIO); | |
604 | goto out_tsk; | |
605 | } | |
606 | pt_succ_return(regs, 0); | |
607 | goto out_tsk; | |
608 | } | |
609 | ||
610 | /* PTRACE_DUMPCORE unsupported... */ | |
611 | ||
731bbe43 DM |
612 | case PTRACE_GETEVENTMSG: { |
613 | int err; | |
614 | ||
615 | if (test_thread_flag(TIF_32BIT)) | |
616 | err = put_user(child->ptrace_message, | |
617 | (unsigned int __user *) data); | |
618 | else | |
619 | err = put_user(child->ptrace_message, | |
620 | (unsigned long __user *) data); | |
621 | if (err) | |
622 | pt_error_return(regs, -err); | |
623 | else | |
624 | pt_succ_return(regs, 0); | |
625 | break; | |
626 | } | |
627 | ||
1da177e4 LT |
628 | default: { |
629 | int err = ptrace_request(child, request, addr, data); | |
630 | if (err) | |
631 | pt_error_return(regs, -err); | |
632 | else | |
633 | pt_succ_return(regs, 0); | |
634 | goto out_tsk; | |
635 | } | |
636 | } | |
1da177e4 LT |
637 | out_tsk: |
638 | if (child) | |
639 | put_task_struct(child); | |
640 | out: | |
641 | unlock_kernel(); | |
642 | } | |
643 | ||
8d8a6479 | 644 | asmlinkage void syscall_trace(struct pt_regs *regs, int syscall_exit_p) |
1da177e4 | 645 | { |
bb49bcda | 646 | /* do the secure computing check first */ |
8d8a6479 | 647 | secure_computing(regs->u_regs[UREG_G1]); |
bb49bcda | 648 | |
f7ceba36 DM |
649 | if (unlikely(current->audit_context) && syscall_exit_p) { |
650 | unsigned long tstate = regs->tstate; | |
651 | int result = AUDITSC_SUCCESS; | |
652 | ||
653 | if (unlikely(tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) | |
654 | result = AUDITSC_FAILURE; | |
655 | ||
656 | audit_syscall_exit(current, result, regs->u_regs[UREG_I0]); | |
657 | } | |
658 | ||
1da177e4 | 659 | if (!(current->ptrace & PT_PTRACED)) |
f7ceba36 DM |
660 | goto out; |
661 | ||
662 | if (!test_thread_flag(TIF_SYSCALL_TRACE)) | |
663 | goto out; | |
664 | ||
1da177e4 LT |
665 | ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) |
666 | ? 0x80 : 0)); | |
667 | ||
668 | /* | |
669 | * this isn't the same as continuing with a signal, but it will do | |
670 | * for normal use. strace only continues with a signal if the | |
671 | * stopping signal is not SIGTRAP. -brl | |
672 | */ | |
1da177e4 | 673 | if (current->exit_code) { |
bb49bcda | 674 | send_sig(current->exit_code, current, 1); |
1da177e4 LT |
675 | current->exit_code = 0; |
676 | } | |
f7ceba36 DM |
677 | |
678 | out: | |
679 | if (unlikely(current->audit_context) && !syscall_exit_p) | |
680 | audit_syscall_entry(current, | |
681 | (test_thread_flag(TIF_32BIT) ? | |
682 | AUDIT_ARCH_SPARC : | |
683 | AUDIT_ARCH_SPARC64), | |
684 | regs->u_regs[UREG_G1], | |
685 | regs->u_regs[UREG_I0], | |
686 | regs->u_regs[UREG_I1], | |
687 | regs->u_regs[UREG_I2], | |
688 | regs->u_regs[UREG_I3]); | |
1da177e4 | 689 | } |