Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
a23ba435 | 2 | * arch/sh/kernel/signal_64.c |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2000, 2001 Paolo Alberelli | |
6ac03437 | 5 | * Copyright (C) 2003 - 2008 Paul Mundt |
1da177e4 LT |
6 | * Copyright (C) 2004 Richard Curnow |
7 | * | |
a23ba435 PM |
8 | * This file is subject to the terms and conditions of the GNU General Public |
9 | * License. See the file "COPYING" in the main directory of this archive | |
10 | * for more details. | |
1da177e4 LT |
11 | */ |
12 | #include <linux/rwsem.h> | |
13 | #include <linux/sched.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/smp.h> | |
1da177e4 LT |
16 | #include <linux/kernel.h> |
17 | #include <linux/signal.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/wait.h> | |
20 | #include <linux/personality.h> | |
1da177e4 LT |
21 | #include <linux/ptrace.h> |
22 | #include <linux/unistd.h> | |
23 | #include <linux/stddef.h> | |
ab99c733 | 24 | #include <linux/tracehook.h> |
1da177e4 LT |
25 | #include <asm/ucontext.h> |
26 | #include <asm/uaccess.h> | |
27 | #include <asm/pgtable.h> | |
f7a7b153 | 28 | #include <asm/cacheflush.h> |
50387b3e | 29 | #include <asm/fpu.h> |
1da177e4 LT |
30 | |
31 | #define REG_RET 9 | |
32 | #define REG_ARG1 2 | |
33 | #define REG_ARG2 3 | |
34 | #define REG_ARG3 4 | |
35 | #define REG_SP 15 | |
36 | #define REG_PR 18 | |
37 | #define REF_REG_RET regs->regs[REG_RET] | |
38 | #define REF_REG_SP regs->regs[REG_SP] | |
39 | #define DEREF_REG_PR regs->regs[REG_PR] | |
40 | ||
41 | #define DEBUG_SIG 0 | |
42 | ||
a610d6e6 | 43 | static void |
b46e8487 | 44 | handle_signal(struct ksignal *ksig, struct pt_regs *regs); |
8a80a5e9 | 45 | |
94e2fb3d PM |
46 | static inline void |
47 | handle_syscall_restart(struct pt_regs *regs, struct sigaction *sa) | |
48 | { | |
49 | /* If we're not from a syscall, bail out */ | |
50 | if (regs->syscall_nr < 0) | |
51 | return; | |
52 | ||
53 | /* check for system call restart.. */ | |
54 | switch (regs->regs[REG_RET]) { | |
55 | case -ERESTART_RESTARTBLOCK: | |
56 | case -ERESTARTNOHAND: | |
57 | no_system_call_restart: | |
58 | regs->regs[REG_RET] = -EINTR; | |
94e2fb3d PM |
59 | break; |
60 | ||
61 | case -ERESTARTSYS: | |
62 | if (!(sa->sa_flags & SA_RESTART)) | |
63 | goto no_system_call_restart; | |
64 | /* fallthrough */ | |
65 | case -ERESTARTNOINTR: | |
66 | /* Decode syscall # */ | |
67 | regs->regs[REG_RET] = regs->syscall_nr; | |
68 | regs->pc -= 4; | |
69 | break; | |
70 | } | |
71 | } | |
72 | ||
ab99c733 PM |
73 | /* |
74 | * Note that 'init' is a special process: it doesn't get signals it doesn't | |
75 | * want to handle. Thus you cannot kill init even with a SIGKILL even by | |
76 | * mistake. | |
77 | * | |
78 | * Note that we go through the signals twice: once to check the signals that | |
79 | * the kernel can handle, and then we build all the user-level signal handling | |
80 | * stack-frames in one go after that. | |
81 | */ | |
9ef461ad | 82 | static void do_signal(struct pt_regs *regs) |
ab99c733 | 83 | { |
b46e8487 | 84 | struct ksignal ksig; |
ab99c733 PM |
85 | |
86 | /* | |
87 | * We want the common case to go fast, which | |
88 | * is why we may in certain cases get here from | |
89 | * kernel mode. Just return without doing anything | |
90 | * if so. | |
91 | */ | |
92 | if (!user_mode(regs)) | |
9ef461ad | 93 | return; |
ab99c733 | 94 | |
b46e8487 RW |
95 | if (get_signal(&ksig)) { |
96 | handle_syscall_restart(regs, &ksig.ka.sa); | |
94e2fb3d | 97 | |
ab99c733 | 98 | /* Whee! Actually deliver the signal. */ |
b46e8487 | 99 | handle_signal(&ksig, regs); |
5754f412 | 100 | return; |
ab99c733 PM |
101 | } |
102 | ||
ab99c733 PM |
103 | /* Did we come from a system call? */ |
104 | if (regs->syscall_nr >= 0) { | |
105 | /* Restart the system call - no handlers present */ | |
106 | switch (regs->regs[REG_RET]) { | |
107 | case -ERESTARTNOHAND: | |
108 | case -ERESTARTSYS: | |
109 | case -ERESTARTNOINTR: | |
110 | /* Decode Syscall # */ | |
111 | regs->regs[REG_RET] = regs->syscall_nr; | |
112 | regs->pc -= 4; | |
113 | break; | |
114 | ||
115 | case -ERESTART_RESTARTBLOCK: | |
116 | regs->regs[REG_RET] = __NR_restart_syscall; | |
117 | regs->pc -= 4; | |
118 | break; | |
119 | } | |
120 | } | |
121 | ||
122 | /* No signal to deliver -- put the saved sigmask back */ | |
51a7b448 | 123 | restore_saved_sigmask(); |
ab99c733 | 124 | } |
1da177e4 | 125 | |
1da177e4 LT |
126 | /* |
127 | * Do a signal return; undo the signal stack. | |
128 | */ | |
94e2fb3d | 129 | struct sigframe { |
1da177e4 LT |
130 | struct sigcontext sc; |
131 | unsigned long extramask[_NSIG_WORDS-1]; | |
132 | long long retcode[2]; | |
133 | }; | |
134 | ||
94e2fb3d | 135 | struct rt_sigframe { |
1da177e4 LT |
136 | struct siginfo __user *pinfo; |
137 | void *puc; | |
138 | struct siginfo info; | |
139 | struct ucontext uc; | |
140 | long long retcode[2]; | |
141 | }; | |
142 | ||
143 | #ifdef CONFIG_SH_FPU | |
144 | static inline int | |
145 | restore_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) | |
146 | { | |
147 | int err = 0; | |
148 | int fpvalid; | |
149 | ||
150 | err |= __get_user (fpvalid, &sc->sc_fpvalid); | |
151 | conditional_used_math(fpvalid); | |
152 | if (! fpvalid) | |
153 | return err; | |
154 | ||
155 | if (current == last_task_used_math) { | |
156 | last_task_used_math = NULL; | |
157 | regs->sr |= SR_FD; | |
158 | } | |
159 | ||
3ef2932b | 160 | err |= __copy_from_user(¤t->thread.xstate->hardfpu, &sc->sc_fpregs[0], |
1da177e4 LT |
161 | (sizeof(long long) * 32) + (sizeof(int) * 1)); |
162 | ||
163 | return err; | |
164 | } | |
165 | ||
166 | static inline int | |
167 | setup_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) | |
168 | { | |
169 | int err = 0; | |
170 | int fpvalid; | |
171 | ||
172 | fpvalid = !!used_math(); | |
173 | err |= __put_user(fpvalid, &sc->sc_fpvalid); | |
174 | if (! fpvalid) | |
175 | return err; | |
176 | ||
177 | if (current == last_task_used_math) { | |
600ee240 | 178 | enable_fpu(); |
61cc7b0a | 179 | save_fpu(current); |
600ee240 | 180 | disable_fpu(); |
1da177e4 LT |
181 | last_task_used_math = NULL; |
182 | regs->sr |= SR_FD; | |
183 | } | |
184 | ||
3ef2932b | 185 | err |= __copy_to_user(&sc->sc_fpregs[0], ¤t->thread.xstate->hardfpu, |
1da177e4 LT |
186 | (sizeof(long long) * 32) + (sizeof(int) * 1)); |
187 | clear_used_math(); | |
188 | ||
189 | return err; | |
190 | } | |
191 | #else | |
192 | static inline int | |
193 | restore_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) | |
f7a7b153 PM |
194 | { |
195 | return 0; | |
196 | } | |
1da177e4 LT |
197 | static inline int |
198 | setup_sigcontext_fpu(struct pt_regs *regs, struct sigcontext __user *sc) | |
f7a7b153 PM |
199 | { |
200 | return 0; | |
201 | } | |
1da177e4 LT |
202 | #endif |
203 | ||
204 | static int | |
205 | restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, long long *r2_p) | |
206 | { | |
207 | unsigned int err = 0; | |
208 | unsigned long long current_sr, new_sr; | |
209 | #define SR_MASK 0xffff8cfd | |
210 | ||
211 | #define COPY(x) err |= __get_user(regs->x, &sc->sc_##x) | |
212 | ||
213 | COPY(regs[0]); COPY(regs[1]); COPY(regs[2]); COPY(regs[3]); | |
214 | COPY(regs[4]); COPY(regs[5]); COPY(regs[6]); COPY(regs[7]); | |
215 | COPY(regs[8]); COPY(regs[9]); COPY(regs[10]); COPY(regs[11]); | |
216 | COPY(regs[12]); COPY(regs[13]); COPY(regs[14]); COPY(regs[15]); | |
217 | COPY(regs[16]); COPY(regs[17]); COPY(regs[18]); COPY(regs[19]); | |
218 | COPY(regs[20]); COPY(regs[21]); COPY(regs[22]); COPY(regs[23]); | |
219 | COPY(regs[24]); COPY(regs[25]); COPY(regs[26]); COPY(regs[27]); | |
220 | COPY(regs[28]); COPY(regs[29]); COPY(regs[30]); COPY(regs[31]); | |
221 | COPY(regs[32]); COPY(regs[33]); COPY(regs[34]); COPY(regs[35]); | |
222 | COPY(regs[36]); COPY(regs[37]); COPY(regs[38]); COPY(regs[39]); | |
223 | COPY(regs[40]); COPY(regs[41]); COPY(regs[42]); COPY(regs[43]); | |
224 | COPY(regs[44]); COPY(regs[45]); COPY(regs[46]); COPY(regs[47]); | |
225 | COPY(regs[48]); COPY(regs[49]); COPY(regs[50]); COPY(regs[51]); | |
226 | COPY(regs[52]); COPY(regs[53]); COPY(regs[54]); COPY(regs[55]); | |
227 | COPY(regs[56]); COPY(regs[57]); COPY(regs[58]); COPY(regs[59]); | |
228 | COPY(regs[60]); COPY(regs[61]); COPY(regs[62]); | |
229 | COPY(tregs[0]); COPY(tregs[1]); COPY(tregs[2]); COPY(tregs[3]); | |
230 | COPY(tregs[4]); COPY(tregs[5]); COPY(tregs[6]); COPY(tregs[7]); | |
231 | ||
232 | /* Prevent the signal handler manipulating SR in a way that can | |
233 | crash the kernel. i.e. only allow S, Q, M, PR, SZ, FR to be | |
234 | modified */ | |
235 | current_sr = regs->sr; | |
236 | err |= __get_user(new_sr, &sc->sc_sr); | |
237 | regs->sr &= SR_MASK; | |
238 | regs->sr |= (new_sr & ~SR_MASK); | |
239 | ||
240 | COPY(pc); | |
241 | ||
242 | #undef COPY | |
243 | ||
244 | /* Must do this last in case it sets regs->sr.fd (i.e. after rest of sr | |
245 | * has been restored above.) */ | |
246 | err |= restore_sigcontext_fpu(regs, sc); | |
247 | ||
248 | regs->syscall_nr = -1; /* disable syscall checks */ | |
249 | err |= __get_user(*r2_p, &sc->sc_regs[REG_RET]); | |
250 | return err; | |
251 | } | |
252 | ||
253 | asmlinkage int sys_sigreturn(unsigned long r2, unsigned long r3, | |
254 | unsigned long r4, unsigned long r5, | |
255 | unsigned long r6, unsigned long r7, | |
256 | struct pt_regs * regs) | |
257 | { | |
258 | struct sigframe __user *frame = (struct sigframe __user *) (long) REF_REG_SP; | |
259 | sigset_t set; | |
260 | long long ret; | |
261 | ||
1bec157a | 262 | /* Always make any pending restarted system calls return -EINTR */ |
f56141e3 | 263 | current->restart_block.fn = do_no_restart_syscall; |
1bec157a | 264 | |
1da177e4 LT |
265 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
266 | goto badframe; | |
267 | ||
268 | if (__get_user(set.sig[0], &frame->sc.oldmask) | |
269 | || (_NSIG_WORDS > 1 | |
270 | && __copy_from_user(&set.sig[1], &frame->extramask, | |
271 | sizeof(frame->extramask)))) | |
272 | goto badframe; | |
273 | ||
5e047fa1 | 274 | set_current_blocked(&set); |
1da177e4 LT |
275 | |
276 | if (restore_sigcontext(regs, &frame->sc, &ret)) | |
277 | goto badframe; | |
278 | regs->pc -= 4; | |
279 | ||
280 | return (int) ret; | |
281 | ||
282 | badframe: | |
283 | force_sig(SIGSEGV, current); | |
284 | return 0; | |
285 | } | |
286 | ||
287 | asmlinkage int sys_rt_sigreturn(unsigned long r2, unsigned long r3, | |
288 | unsigned long r4, unsigned long r5, | |
289 | unsigned long r6, unsigned long r7, | |
290 | struct pt_regs * regs) | |
291 | { | |
292 | struct rt_sigframe __user *frame = (struct rt_sigframe __user *) (long) REF_REG_SP; | |
293 | sigset_t set; | |
1da177e4 LT |
294 | long long ret; |
295 | ||
1bec157a | 296 | /* Always make any pending restarted system calls return -EINTR */ |
f56141e3 | 297 | current->restart_block.fn = do_no_restart_syscall; |
1bec157a | 298 | |
1da177e4 LT |
299 | if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) |
300 | goto badframe; | |
301 | ||
302 | if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) | |
303 | goto badframe; | |
304 | ||
5e047fa1 | 305 | set_current_blocked(&set); |
1da177e4 LT |
306 | |
307 | if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ret)) | |
308 | goto badframe; | |
309 | regs->pc -= 4; | |
310 | ||
7a879a94 | 311 | if (restore_altstack(&frame->uc.uc_stack)) |
9dc87c7b | 312 | goto badframe; |
1da177e4 LT |
313 | |
314 | return (int) ret; | |
315 | ||
316 | badframe: | |
317 | force_sig(SIGSEGV, current); | |
318 | return 0; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Set up a signal frame. | |
323 | */ | |
1da177e4 LT |
324 | static int |
325 | setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, | |
326 | unsigned long mask) | |
327 | { | |
328 | int err = 0; | |
329 | ||
330 | /* Do this first, otherwise is this sets sr->fd, that value isn't preserved. */ | |
331 | err |= setup_sigcontext_fpu(regs, sc); | |
332 | ||
333 | #define COPY(x) err |= __put_user(regs->x, &sc->sc_##x) | |
334 | ||
335 | COPY(regs[0]); COPY(regs[1]); COPY(regs[2]); COPY(regs[3]); | |
336 | COPY(regs[4]); COPY(regs[5]); COPY(regs[6]); COPY(regs[7]); | |
337 | COPY(regs[8]); COPY(regs[9]); COPY(regs[10]); COPY(regs[11]); | |
338 | COPY(regs[12]); COPY(regs[13]); COPY(regs[14]); COPY(regs[15]); | |
339 | COPY(regs[16]); COPY(regs[17]); COPY(regs[18]); COPY(regs[19]); | |
340 | COPY(regs[20]); COPY(regs[21]); COPY(regs[22]); COPY(regs[23]); | |
341 | COPY(regs[24]); COPY(regs[25]); COPY(regs[26]); COPY(regs[27]); | |
342 | COPY(regs[28]); COPY(regs[29]); COPY(regs[30]); COPY(regs[31]); | |
343 | COPY(regs[32]); COPY(regs[33]); COPY(regs[34]); COPY(regs[35]); | |
344 | COPY(regs[36]); COPY(regs[37]); COPY(regs[38]); COPY(regs[39]); | |
345 | COPY(regs[40]); COPY(regs[41]); COPY(regs[42]); COPY(regs[43]); | |
346 | COPY(regs[44]); COPY(regs[45]); COPY(regs[46]); COPY(regs[47]); | |
347 | COPY(regs[48]); COPY(regs[49]); COPY(regs[50]); COPY(regs[51]); | |
348 | COPY(regs[52]); COPY(regs[53]); COPY(regs[54]); COPY(regs[55]); | |
349 | COPY(regs[56]); COPY(regs[57]); COPY(regs[58]); COPY(regs[59]); | |
350 | COPY(regs[60]); COPY(regs[61]); COPY(regs[62]); | |
351 | COPY(tregs[0]); COPY(tregs[1]); COPY(tregs[2]); COPY(tregs[3]); | |
352 | COPY(tregs[4]); COPY(tregs[5]); COPY(tregs[6]); COPY(tregs[7]); | |
353 | COPY(sr); COPY(pc); | |
354 | ||
355 | #undef COPY | |
356 | ||
357 | err |= __put_user(mask, &sc->oldmask); | |
358 | ||
359 | return err; | |
360 | } | |
361 | ||
362 | /* | |
363 | * Determine which stack to use.. | |
364 | */ | |
365 | static inline void __user * | |
366 | get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size) | |
367 | { | |
d09042da | 368 | if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp)) |
1da177e4 LT |
369 | sp = current->sas_ss_sp + current->sas_ss_size; |
370 | ||
371 | return (void __user *)((sp - frame_size) & -8ul); | |
372 | } | |
373 | ||
374 | void sa_default_restorer(void); /* See comments below */ | |
375 | void sa_default_rt_restorer(void); /* See comments below */ | |
376 | ||
b46e8487 | 377 | static int setup_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) |
1da177e4 LT |
378 | { |
379 | struct sigframe __user *frame; | |
b46e8487 | 380 | int err = 0, sig = ksig->sig; |
1da177e4 LT |
381 | int signal; |
382 | ||
b46e8487 | 383 | frame = get_sigframe(&ksig->ka, regs->regs[REG_SP], sizeof(*frame)); |
1da177e4 LT |
384 | |
385 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) | |
b46e8487 | 386 | return -EFAULT; |
1da177e4 LT |
387 | |
388 | signal = current_thread_info()->exec_domain | |
389 | && current_thread_info()->exec_domain->signal_invmap | |
390 | && sig < 32 | |
391 | ? current_thread_info()->exec_domain->signal_invmap[sig] | |
392 | : sig; | |
393 | ||
394 | err |= setup_sigcontext(&frame->sc, regs, set->sig[0]); | |
395 | ||
396 | /* Give up earlier as i386, in case */ | |
397 | if (err) | |
b46e8487 | 398 | return -EFAULT; |
1da177e4 LT |
399 | |
400 | if (_NSIG_WORDS > 1) { | |
401 | err |= __copy_to_user(frame->extramask, &set->sig[1], | |
402 | sizeof(frame->extramask)); } | |
403 | ||
404 | /* Give up earlier as i386, in case */ | |
405 | if (err) | |
b46e8487 | 406 | return -EFAULT; |
1da177e4 LT |
407 | |
408 | /* Set up to return from userspace. If provided, use a stub | |
409 | already in userspace. */ | |
b46e8487 | 410 | if (ksig->ka.sa.sa_flags & SA_RESTORER) { |
1da177e4 LT |
411 | /* |
412 | * On SH5 all edited pointers are subject to NEFF | |
413 | */ | |
c7914834 | 414 | DEREF_REG_PR = neff_sign_extend((unsigned long) |
b46e8487 | 415 | ksig->ka->sa.sa_restorer | 0x1); |
1da177e4 LT |
416 | } else { |
417 | /* | |
418 | * Different approach on SH5. | |
419 | * . Endianness independent asm code gets placed in entry.S . | |
420 | * This is limited to four ASM instructions corresponding | |
421 | * to two long longs in size. | |
422 | * . err checking is done on the else branch only | |
423 | * . flush_icache_range() is called upon __put_user() only | |
424 | * . all edited pointers are subject to NEFF | |
425 | * . being code, linker turns ShMedia bit on, always | |
426 | * dereference index -1. | |
427 | */ | |
c7914834 PM |
428 | DEREF_REG_PR = neff_sign_extend((unsigned long) |
429 | frame->retcode | 0x01); | |
1da177e4 LT |
430 | |
431 | if (__copy_to_user(frame->retcode, | |
091db045 | 432 | (void *)((unsigned long)sa_default_restorer & (~1)), 16) != 0) |
b46e8487 | 433 | return -EFAULT; |
1da177e4 LT |
434 | |
435 | /* Cohere the trampoline with the I-cache. */ | |
b613881e | 436 | flush_cache_sigtramp(DEREF_REG_PR-1); |
1da177e4 LT |
437 | } |
438 | ||
439 | /* | |
440 | * Set up registers for signal handler. | |
441 | * All edited pointers are subject to NEFF. | |
442 | */ | |
c7914834 | 443 | regs->regs[REG_SP] = neff_sign_extend((unsigned long)frame); |
1da177e4 LT |
444 | regs->regs[REG_ARG1] = signal; /* Arg for signal handler */ |
445 | ||
446 | /* FIXME: | |
447 | The glibc profiling support for SH-5 needs to be passed a sigcontext | |
448 | so it can retrieve the PC. At some point during 2003 the glibc | |
449 | support was changed to receive the sigcontext through the 2nd | |
450 | argument, but there are still versions of libc.so in use that use | |
451 | the 3rd argument. Until libc.so is stabilised, pass the sigcontext | |
452 | through both 2nd and 3rd arguments. | |
453 | */ | |
454 | ||
455 | regs->regs[REG_ARG2] = (unsigned long long)(unsigned long)(signed long)&frame->sc; | |
456 | regs->regs[REG_ARG3] = (unsigned long long)(unsigned long)(signed long)&frame->sc; | |
457 | ||
b46e8487 | 458 | regs->pc = neff_sign_extend((unsigned long)ksig->ka.sa.sa_handler); |
1da177e4 LT |
459 | |
460 | set_fs(USER_DS); | |
461 | ||
1da177e4 | 462 | /* Broken %016Lx */ |
6ac03437 PM |
463 | pr_debug("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n", |
464 | signal, current->comm, current->pid, frame, | |
465 | regs->pc >> 32, regs->pc & 0xffffffff, | |
466 | DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff); | |
1da177e4 | 467 | |
6ac03437 | 468 | return 0; |
1da177e4 LT |
469 | } |
470 | ||
b46e8487 RW |
471 | static int setup_rt_frame(struct ksignal *kig, sigset_t *set, |
472 | struct pt_regs *regs) | |
1da177e4 LT |
473 | { |
474 | struct rt_sigframe __user *frame; | |
b46e8487 | 475 | int err = 0, sig = ksig->sig; |
1da177e4 LT |
476 | int signal; |
477 | ||
b46e8487 | 478 | frame = get_sigframe(&ksig->ka, regs->regs[REG_SP], sizeof(*frame)); |
1da177e4 LT |
479 | |
480 | if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) | |
b46e8487 | 481 | return -EFAULT; |
1da177e4 LT |
482 | |
483 | signal = current_thread_info()->exec_domain | |
484 | && current_thread_info()->exec_domain->signal_invmap | |
485 | && sig < 32 | |
486 | ? current_thread_info()->exec_domain->signal_invmap[sig] | |
487 | : sig; | |
488 | ||
489 | err |= __put_user(&frame->info, &frame->pinfo); | |
490 | err |= __put_user(&frame->uc, &frame->puc); | |
b46e8487 | 491 | err |= copy_siginfo_to_user(&frame->info, &ksig->info); |
1da177e4 LT |
492 | |
493 | /* Give up earlier as i386, in case */ | |
494 | if (err) | |
b46e8487 | 495 | return -EFAULT; |
1da177e4 LT |
496 | |
497 | /* Create the ucontext. */ | |
498 | err |= __put_user(0, &frame->uc.uc_flags); | |
499 | err |= __put_user(0, &frame->uc.uc_link); | |
7a879a94 | 500 | err |= __save_altstack(&frame->uc.uc_stack, regs->regs[REG_SP]); |
1da177e4 LT |
501 | err |= setup_sigcontext(&frame->uc.uc_mcontext, |
502 | regs, set->sig[0]); | |
503 | err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); | |
504 | ||
505 | /* Give up earlier as i386, in case */ | |
506 | if (err) | |
b46e8487 | 507 | return -EFAULT; |
1da177e4 LT |
508 | |
509 | /* Set up to return from userspace. If provided, use a stub | |
510 | already in userspace. */ | |
b46e8487 | 511 | if (ksig->ka.sa.sa_flags & SA_RESTORER) { |
1da177e4 LT |
512 | /* |
513 | * On SH5 all edited pointers are subject to NEFF | |
514 | */ | |
c7914834 | 515 | DEREF_REG_PR = neff_sign_extend((unsigned long) |
b46e8487 | 516 | ksig->ka.sa.sa_restorer | 0x1); |
1da177e4 LT |
517 | } else { |
518 | /* | |
519 | * Different approach on SH5. | |
520 | * . Endianness independent asm code gets placed in entry.S . | |
521 | * This is limited to four ASM instructions corresponding | |
522 | * to two long longs in size. | |
523 | * . err checking is done on the else branch only | |
524 | * . flush_icache_range() is called upon __put_user() only | |
525 | * . all edited pointers are subject to NEFF | |
526 | * . being code, linker turns ShMedia bit on, always | |
527 | * dereference index -1. | |
528 | */ | |
c7914834 PM |
529 | DEREF_REG_PR = neff_sign_extend((unsigned long) |
530 | frame->retcode | 0x01); | |
1da177e4 LT |
531 | |
532 | if (__copy_to_user(frame->retcode, | |
091db045 | 533 | (void *)((unsigned long)sa_default_rt_restorer & (~1)), 16) != 0) |
b46e8487 | 534 | return -EFAULT; |
1da177e4 | 535 | |
c7914834 | 536 | /* Cohere the trampoline with the I-cache. */ |
1da177e4 LT |
537 | flush_icache_range(DEREF_REG_PR-1, DEREF_REG_PR-1+15); |
538 | } | |
539 | ||
540 | /* | |
541 | * Set up registers for signal handler. | |
542 | * All edited pointers are subject to NEFF. | |
543 | */ | |
c7914834 | 544 | regs->regs[REG_SP] = neff_sign_extend((unsigned long)frame); |
1da177e4 LT |
545 | regs->regs[REG_ARG1] = signal; /* Arg for signal handler */ |
546 | regs->regs[REG_ARG2] = (unsigned long long)(unsigned long)(signed long)&frame->info; | |
547 | regs->regs[REG_ARG3] = (unsigned long long)(unsigned long)(signed long)&frame->uc.uc_mcontext; | |
b46e8487 | 548 | regs->pc = neff_sign_extend((unsigned long)ksig->ka.sa.sa_handler); |
1da177e4 LT |
549 | |
550 | set_fs(USER_DS); | |
551 | ||
6ac03437 PM |
552 | pr_debug("SIG deliver (#%d,%s:%d): sp=%p pc=%08Lx%08Lx link=%08Lx%08Lx\n", |
553 | signal, current->comm, current->pid, frame, | |
554 | regs->pc >> 32, regs->pc & 0xffffffff, | |
555 | DEREF_REG_PR >> 32, DEREF_REG_PR & 0xffffffff); | |
1da177e4 | 556 | |
6ac03437 | 557 | return 0; |
1da177e4 LT |
558 | } |
559 | ||
560 | /* | |
561 | * OK, we're invoking a handler | |
562 | */ | |
a610d6e6 | 563 | static void |
b46e8487 | 564 | handle_signal(struct ksignal *ksig, struct pt_regs *regs) |
1da177e4 | 565 | { |
b7f9a11a | 566 | sigset_t *oldset = sigmask_to_save(); |
6ac03437 PM |
567 | int ret; |
568 | ||
1da177e4 | 569 | /* Set up the stack frame */ |
b46e8487 RW |
570 | if (ksig->ka.sa.sa_flags & SA_SIGINFO) |
571 | ret = setup_rt_frame(ksig, oldset, regs); | |
1da177e4 | 572 | else |
b46e8487 | 573 | ret = setup_frame(ksig, oldset, regs); |
1da177e4 | 574 | |
b46e8487 | 575 | signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP)); |
1da177e4 LT |
576 | } |
577 | ||
ab99c733 | 578 | asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) |
1da177e4 | 579 | { |
ab99c733 | 580 | if (thread_info_flags & _TIF_SIGPENDING) |
9ef461ad | 581 | do_signal(regs); |
c18fe9a0 | 582 | |
ab99c733 PM |
583 | if (thread_info_flags & _TIF_NOTIFY_RESUME) { |
584 | clear_thread_flag(TIF_NOTIFY_RESUME); | |
585 | tracehook_notify_resume(regs); | |
1da177e4 | 586 | } |
1da177e4 | 587 | } |