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1da177e4 LT |
1 | /* $Id: signal32.c,v 1.74 2002/02/09 19:49:30 davem Exp $ |
2 | * arch/sparc64/kernel/signal32.c | |
3 | * | |
4 | * Copyright (C) 1991, 1992 Linus Torvalds | |
5 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
6 | * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) | |
7 | * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) | |
8 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
9 | */ | |
10 | ||
11 | #include <linux/sched.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/signal.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/wait.h> | |
16 | #include <linux/ptrace.h> | |
17 | #include <linux/unistd.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/tty.h> | |
20 | #include <linux/smp_lock.h> | |
21 | #include <linux/binfmts.h> | |
22 | #include <linux/compat.h> | |
23 | #include <linux/bitops.h> | |
24 | ||
25 | #include <asm/uaccess.h> | |
26 | #include <asm/ptrace.h> | |
27 | #include <asm/svr4.h> | |
28 | #include <asm/pgtable.h> | |
29 | #include <asm/psrcompat.h> | |
30 | #include <asm/fpumacro.h> | |
31 | #include <asm/visasm.h> | |
32 | ||
33 | #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) | |
34 | ||
35 | int do_signal32(sigset_t *oldset, struct pt_regs *regs, | |
36 | unsigned long orig_o0, int ret_from_syscall); | |
37 | ||
38 | /* Signal frames: the original one (compatible with SunOS): | |
39 | * | |
40 | * Set up a signal frame... Make the stack look the way SunOS | |
41 | * expects it to look which is basically: | |
42 | * | |
43 | * ---------------------------------- <-- %sp at signal time | |
44 | * Struct sigcontext | |
45 | * Signal address | |
46 | * Ptr to sigcontext area above | |
47 | * Signal code | |
48 | * The signal number itself | |
49 | * One register window | |
50 | * ---------------------------------- <-- New %sp | |
51 | */ | |
52 | struct signal_sframe32 { | |
53 | struct reg_window32 sig_window; | |
54 | int sig_num; | |
55 | int sig_code; | |
56 | /* struct sigcontext32 * */ u32 sig_scptr; | |
57 | int sig_address; | |
58 | struct sigcontext32 sig_context; | |
59 | unsigned int extramask[_COMPAT_NSIG_WORDS - 1]; | |
60 | }; | |
61 | ||
62 | /* This magic should be in g_upper[0] for all upper parts | |
63 | * to be valid. | |
64 | */ | |
65 | #define SIGINFO_EXTRA_V8PLUS_MAGIC 0x130e269 | |
66 | typedef struct { | |
67 | unsigned int g_upper[8]; | |
68 | unsigned int o_upper[8]; | |
69 | unsigned int asi; | |
70 | } siginfo_extra_v8plus_t; | |
71 | ||
72 | /* | |
73 | * And the new one, intended to be used for Linux applications only | |
74 | * (we have enough in there to work with clone). | |
75 | * All the interesting bits are in the info field. | |
76 | */ | |
77 | struct new_signal_frame32 { | |
78 | struct sparc_stackf32 ss; | |
79 | __siginfo32_t info; | |
80 | /* __siginfo_fpu32_t * */ u32 fpu_save; | |
81 | unsigned int insns[2]; | |
82 | unsigned int extramask[_COMPAT_NSIG_WORDS - 1]; | |
83 | unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */ | |
84 | /* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */ | |
85 | siginfo_extra_v8plus_t v8plus; | |
86 | __siginfo_fpu_t fpu_state; | |
87 | }; | |
88 | ||
89 | typedef struct compat_siginfo{ | |
90 | int si_signo; | |
91 | int si_errno; | |
92 | int si_code; | |
93 | ||
94 | union { | |
95 | int _pad[SI_PAD_SIZE32]; | |
96 | ||
97 | /* kill() */ | |
98 | struct { | |
99 | compat_pid_t _pid; /* sender's pid */ | |
100 | unsigned int _uid; /* sender's uid */ | |
101 | } _kill; | |
102 | ||
103 | /* POSIX.1b timers */ | |
104 | struct { | |
0d77e5a2 | 105 | compat_timer_t _tid; /* timer id */ |
1da177e4 LT |
106 | int _overrun; /* overrun count */ |
107 | compat_sigval_t _sigval; /* same as below */ | |
108 | int _sys_private; /* not to be passed to user */ | |
109 | } _timer; | |
110 | ||
111 | /* POSIX.1b signals */ | |
112 | struct { | |
113 | compat_pid_t _pid; /* sender's pid */ | |
114 | unsigned int _uid; /* sender's uid */ | |
115 | compat_sigval_t _sigval; | |
116 | } _rt; | |
117 | ||
118 | /* SIGCHLD */ | |
119 | struct { | |
120 | compat_pid_t _pid; /* which child */ | |
121 | unsigned int _uid; /* sender's uid */ | |
122 | int _status; /* exit code */ | |
123 | compat_clock_t _utime; | |
124 | compat_clock_t _stime; | |
125 | } _sigchld; | |
126 | ||
127 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */ | |
128 | struct { | |
129 | u32 _addr; /* faulting insn/memory ref. */ | |
130 | int _trapno; | |
131 | } _sigfault; | |
132 | ||
133 | /* SIGPOLL */ | |
134 | struct { | |
135 | int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ | |
136 | int _fd; | |
137 | } _sigpoll; | |
138 | } _sifields; | |
139 | }compat_siginfo_t; | |
140 | ||
141 | struct rt_signal_frame32 { | |
142 | struct sparc_stackf32 ss; | |
143 | compat_siginfo_t info; | |
144 | struct pt_regs32 regs; | |
145 | compat_sigset_t mask; | |
146 | /* __siginfo_fpu32_t * */ u32 fpu_save; | |
147 | unsigned int insns[2]; | |
148 | stack_t32 stack; | |
149 | unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */ | |
150 | /* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */ | |
151 | siginfo_extra_v8plus_t v8plus; | |
152 | __siginfo_fpu_t fpu_state; | |
153 | }; | |
154 | ||
155 | /* Align macros */ | |
156 | #define SF_ALIGNEDSZ (((sizeof(struct signal_sframe32) + 7) & (~7))) | |
157 | #define NF_ALIGNEDSZ (((sizeof(struct new_signal_frame32) + 7) & (~7))) | |
158 | #define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame32) + 7) & (~7))) | |
159 | ||
160 | int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) | |
161 | { | |
162 | int err; | |
163 | ||
164 | if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t))) | |
165 | return -EFAULT; | |
166 | ||
167 | /* If you change siginfo_t structure, please be sure | |
168 | this code is fixed accordingly. | |
169 | It should never copy any pad contained in the structure | |
170 | to avoid security leaks, but must copy the generic | |
171 | 3 ints plus the relevant union member. | |
172 | This routine must convert siginfo from 64bit to 32bit as well | |
173 | at the same time. */ | |
174 | err = __put_user(from->si_signo, &to->si_signo); | |
175 | err |= __put_user(from->si_errno, &to->si_errno); | |
176 | err |= __put_user((short)from->si_code, &to->si_code); | |
177 | if (from->si_code < 0) | |
178 | err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); | |
179 | else { | |
180 | switch (from->si_code >> 16) { | |
181 | case __SI_TIMER >> 16: | |
182 | err |= __put_user(from->si_tid, &to->si_tid); | |
183 | err |= __put_user(from->si_overrun, &to->si_overrun); | |
184 | err |= __put_user(from->si_int, &to->si_int); | |
185 | break; | |
186 | case __SI_CHLD >> 16: | |
187 | err |= __put_user(from->si_utime, &to->si_utime); | |
188 | err |= __put_user(from->si_stime, &to->si_stime); | |
189 | err |= __put_user(from->si_status, &to->si_status); | |
190 | default: | |
191 | err |= __put_user(from->si_pid, &to->si_pid); | |
192 | err |= __put_user(from->si_uid, &to->si_uid); | |
193 | break; | |
194 | case __SI_FAULT >> 16: | |
1da177e4 LT |
195 | err |= __put_user(from->si_trapno, &to->si_trapno); |
196 | err |= __put_user((unsigned long)from->si_addr, &to->si_addr); | |
197 | break; | |
9c7d3b3a JS |
198 | case __SI_POLL >> 16: |
199 | err |= __put_user(from->si_band, &to->si_band); | |
200 | err |= __put_user(from->si_fd, &to->si_fd); | |
201 | break; | |
1da177e4 LT |
202 | case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ |
203 | case __SI_MESGQ >> 16: | |
204 | err |= __put_user(from->si_pid, &to->si_pid); | |
205 | err |= __put_user(from->si_uid, &to->si_uid); | |
206 | err |= __put_user(from->si_int, &to->si_int); | |
207 | break; | |
208 | } | |
209 | } | |
210 | return err; | |
211 | } | |
212 | ||
213 | /* CAUTION: This is just a very minimalist implementation for the | |
214 | * sake of compat_sys_rt_sigqueueinfo() | |
215 | */ | |
216 | int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) | |
217 | { | |
218 | if (!access_ok(VERIFY_WRITE, from, sizeof(compat_siginfo_t))) | |
219 | return -EFAULT; | |
220 | ||
221 | if (copy_from_user(to, from, 3*sizeof(int)) || | |
222 | copy_from_user(to->_sifields._pad, from->_sifields._pad, | |
223 | SI_PAD_SIZE)) | |
224 | return -EFAULT; | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
229 | /* | |
230 | * atomically swap in the new signal mask, and wait for a signal. | |
231 | * This is really tricky on the Sparc, watch out... | |
232 | */ | |
233 | asmlinkage void _sigpause32_common(compat_old_sigset_t set, struct pt_regs *regs) | |
234 | { | |
235 | sigset_t saveset; | |
236 | ||
237 | set &= _BLOCKABLE; | |
238 | spin_lock_irq(¤t->sighand->siglock); | |
239 | saveset = current->blocked; | |
240 | siginitset(¤t->blocked, set); | |
241 | recalc_sigpending(); | |
242 | spin_unlock_irq(¤t->sighand->siglock); | |
243 | ||
244 | regs->tpc = regs->tnpc; | |
245 | regs->tnpc += 4; | |
246 | if (test_thread_flag(TIF_32BIT)) { | |
247 | regs->tpc &= 0xffffffff; | |
248 | regs->tnpc &= 0xffffffff; | |
249 | } | |
250 | ||
251 | /* Condition codes and return value where set here for sigpause, | |
252 | * and so got used by setup_frame, which again causes sigreturn() | |
253 | * to return -EINTR. | |
254 | */ | |
255 | while (1) { | |
256 | current->state = TASK_INTERRUPTIBLE; | |
257 | schedule(); | |
258 | /* | |
259 | * Return -EINTR and set condition code here, | |
260 | * so the interrupted system call actually returns | |
261 | * these. | |
262 | */ | |
263 | regs->tstate |= TSTATE_ICARRY; | |
264 | regs->u_regs[UREG_I0] = EINTR; | |
265 | if (do_signal32(&saveset, regs, 0, 0)) | |
266 | return; | |
267 | } | |
268 | } | |
269 | ||
270 | asmlinkage void do_rt_sigsuspend32(u32 uset, size_t sigsetsize, struct pt_regs *regs) | |
271 | { | |
272 | sigset_t oldset, set; | |
273 | compat_sigset_t set32; | |
274 | ||
275 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
276 | if (((compat_size_t)sigsetsize) != sizeof(sigset_t)) { | |
277 | regs->tstate |= TSTATE_ICARRY; | |
278 | regs->u_regs[UREG_I0] = EINVAL; | |
279 | return; | |
280 | } | |
281 | if (copy_from_user(&set32, compat_ptr(uset), sizeof(set32))) { | |
282 | regs->tstate |= TSTATE_ICARRY; | |
283 | regs->u_regs[UREG_I0] = EFAULT; | |
284 | return; | |
285 | } | |
286 | switch (_NSIG_WORDS) { | |
287 | case 4: set.sig[3] = set32.sig[6] + (((long)set32.sig[7]) << 32); | |
288 | case 3: set.sig[2] = set32.sig[4] + (((long)set32.sig[5]) << 32); | |
289 | case 2: set.sig[1] = set32.sig[2] + (((long)set32.sig[3]) << 32); | |
290 | case 1: set.sig[0] = set32.sig[0] + (((long)set32.sig[1]) << 32); | |
291 | } | |
292 | sigdelsetmask(&set, ~_BLOCKABLE); | |
293 | spin_lock_irq(¤t->sighand->siglock); | |
294 | oldset = current->blocked; | |
295 | current->blocked = set; | |
296 | recalc_sigpending(); | |
297 | spin_unlock_irq(¤t->sighand->siglock); | |
298 | ||
299 | regs->tpc = regs->tnpc; | |
300 | regs->tnpc += 4; | |
301 | if (test_thread_flag(TIF_32BIT)) { | |
302 | regs->tpc &= 0xffffffff; | |
303 | regs->tnpc &= 0xffffffff; | |
304 | } | |
305 | ||
306 | /* Condition codes and return value where set here for sigpause, | |
307 | * and so got used by setup_frame, which again causes sigreturn() | |
308 | * to return -EINTR. | |
309 | */ | |
310 | while (1) { | |
311 | current->state = TASK_INTERRUPTIBLE; | |
312 | schedule(); | |
313 | /* | |
314 | * Return -EINTR and set condition code here, | |
315 | * so the interrupted system call actually returns | |
316 | * these. | |
317 | */ | |
318 | regs->tstate |= TSTATE_ICARRY; | |
319 | regs->u_regs[UREG_I0] = EINTR; | |
320 | if (do_signal32(&oldset, regs, 0, 0)) | |
321 | return; | |
322 | } | |
323 | } | |
324 | ||
325 | static int restore_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu) | |
326 | { | |
327 | unsigned long *fpregs = current_thread_info()->fpregs; | |
328 | unsigned long fprs; | |
329 | int err; | |
330 | ||
331 | err = __get_user(fprs, &fpu->si_fprs); | |
332 | fprs_write(0); | |
333 | regs->tstate &= ~TSTATE_PEF; | |
334 | if (fprs & FPRS_DL) | |
335 | err |= copy_from_user(fpregs, &fpu->si_float_regs[0], (sizeof(unsigned int) * 32)); | |
336 | if (fprs & FPRS_DU) | |
337 | err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32], (sizeof(unsigned int) * 32)); | |
338 | err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr); | |
339 | err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr); | |
340 | current_thread_info()->fpsaved[0] |= fprs; | |
341 | return err; | |
342 | } | |
343 | ||
344 | void do_new_sigreturn32(struct pt_regs *regs) | |
345 | { | |
346 | struct new_signal_frame32 __user *sf; | |
347 | unsigned int psr; | |
348 | unsigned pc, npc, fpu_save; | |
349 | sigset_t set; | |
350 | unsigned seta[_COMPAT_NSIG_WORDS]; | |
351 | int err, i; | |
352 | ||
353 | regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; | |
354 | sf = (struct new_signal_frame32 __user *) regs->u_regs[UREG_FP]; | |
355 | ||
356 | /* 1. Make sure we are not getting garbage from the user */ | |
357 | if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) || | |
358 | (((unsigned long) sf) & 3)) | |
359 | goto segv; | |
360 | ||
361 | get_user(pc, &sf->info.si_regs.pc); | |
362 | __get_user(npc, &sf->info.si_regs.npc); | |
363 | ||
364 | if ((pc | npc) & 3) | |
365 | goto segv; | |
366 | ||
367 | if (test_thread_flag(TIF_32BIT)) { | |
368 | pc &= 0xffffffff; | |
369 | npc &= 0xffffffff; | |
370 | } | |
371 | regs->tpc = pc; | |
372 | regs->tnpc = npc; | |
373 | ||
374 | /* 2. Restore the state */ | |
375 | err = __get_user(regs->y, &sf->info.si_regs.y); | |
376 | err |= __get_user(psr, &sf->info.si_regs.psr); | |
377 | ||
378 | for (i = UREG_G1; i <= UREG_I7; i++) | |
379 | err |= __get_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]); | |
380 | if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) { | |
381 | err |= __get_user(i, &sf->v8plus.g_upper[0]); | |
382 | if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) { | |
383 | unsigned long asi; | |
384 | ||
385 | for (i = UREG_G1; i <= UREG_I7; i++) | |
386 | err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]); | |
387 | err |= __get_user(asi, &sf->v8plus.asi); | |
388 | regs->tstate &= ~TSTATE_ASI; | |
389 | regs->tstate |= ((asi & 0xffUL) << 24UL); | |
390 | } | |
391 | } | |
392 | ||
393 | /* User can only change condition codes in %tstate. */ | |
394 | regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); | |
395 | regs->tstate |= psr_to_tstate_icc(psr); | |
396 | ||
397 | err |= __get_user(fpu_save, &sf->fpu_save); | |
398 | if (fpu_save) | |
399 | err |= restore_fpu_state32(regs, &sf->fpu_state); | |
400 | err |= __get_user(seta[0], &sf->info.si_mask); | |
401 | err |= copy_from_user(seta+1, &sf->extramask, | |
402 | (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); | |
403 | if (err) | |
404 | goto segv; | |
405 | switch (_NSIG_WORDS) { | |
406 | case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32); | |
407 | case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32); | |
408 | case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32); | |
409 | case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32); | |
410 | } | |
411 | sigdelsetmask(&set, ~_BLOCKABLE); | |
412 | spin_lock_irq(¤t->sighand->siglock); | |
413 | current->blocked = set; | |
414 | recalc_sigpending(); | |
415 | spin_unlock_irq(¤t->sighand->siglock); | |
416 | return; | |
417 | ||
418 | segv: | |
419 | force_sig(SIGSEGV, current); | |
420 | } | |
421 | ||
422 | asmlinkage void do_sigreturn32(struct pt_regs *regs) | |
423 | { | |
424 | struct sigcontext32 __user *scptr; | |
425 | unsigned int pc, npc, psr; | |
426 | sigset_t set; | |
427 | unsigned int seta[_COMPAT_NSIG_WORDS]; | |
428 | int err; | |
429 | ||
430 | /* Always make any pending restarted system calls return -EINTR */ | |
431 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
432 | ||
433 | synchronize_user_stack(); | |
434 | if (test_thread_flag(TIF_NEWSIGNALS)) { | |
435 | do_new_sigreturn32(regs); | |
436 | return; | |
437 | } | |
438 | ||
439 | scptr = (struct sigcontext32 __user *) | |
440 | (regs->u_regs[UREG_I0] & 0x00000000ffffffffUL); | |
441 | /* Check sanity of the user arg. */ | |
442 | if (!access_ok(VERIFY_READ, scptr, sizeof(struct sigcontext32)) || | |
443 | (((unsigned long) scptr) & 3)) | |
444 | goto segv; | |
445 | ||
446 | err = __get_user(pc, &scptr->sigc_pc); | |
447 | err |= __get_user(npc, &scptr->sigc_npc); | |
448 | ||
449 | if ((pc | npc) & 3) | |
450 | goto segv; /* Nice try. */ | |
451 | ||
452 | err |= __get_user(seta[0], &scptr->sigc_mask); | |
453 | /* Note that scptr + 1 points to extramask */ | |
454 | err |= copy_from_user(seta+1, scptr + 1, | |
455 | (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); | |
456 | if (err) | |
457 | goto segv; | |
458 | switch (_NSIG_WORDS) { | |
459 | case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32); | |
460 | case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32); | |
461 | case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32); | |
462 | case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32); | |
463 | } | |
464 | sigdelsetmask(&set, ~_BLOCKABLE); | |
465 | spin_lock_irq(¤t->sighand->siglock); | |
466 | current->blocked = set; | |
467 | recalc_sigpending(); | |
468 | spin_unlock_irq(¤t->sighand->siglock); | |
469 | ||
470 | if (test_thread_flag(TIF_32BIT)) { | |
471 | pc &= 0xffffffff; | |
472 | npc &= 0xffffffff; | |
473 | } | |
474 | regs->tpc = pc; | |
475 | regs->tnpc = npc; | |
476 | err = __get_user(regs->u_regs[UREG_FP], &scptr->sigc_sp); | |
477 | err |= __get_user(regs->u_regs[UREG_I0], &scptr->sigc_o0); | |
478 | err |= __get_user(regs->u_regs[UREG_G1], &scptr->sigc_g1); | |
479 | ||
480 | /* User can only change condition codes in %tstate. */ | |
481 | err |= __get_user(psr, &scptr->sigc_psr); | |
482 | if (err) | |
483 | goto segv; | |
484 | regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); | |
485 | regs->tstate |= psr_to_tstate_icc(psr); | |
486 | return; | |
487 | ||
488 | segv: | |
489 | force_sig(SIGSEGV, current); | |
490 | } | |
491 | ||
492 | asmlinkage void do_rt_sigreturn32(struct pt_regs *regs) | |
493 | { | |
494 | struct rt_signal_frame32 __user *sf; | |
495 | unsigned int psr, pc, npc, fpu_save, u_ss_sp; | |
496 | mm_segment_t old_fs; | |
497 | sigset_t set; | |
498 | compat_sigset_t seta; | |
499 | stack_t st; | |
500 | int err, i; | |
501 | ||
502 | /* Always make any pending restarted system calls return -EINTR */ | |
503 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
504 | ||
505 | synchronize_user_stack(); | |
506 | regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; | |
507 | sf = (struct rt_signal_frame32 __user *) regs->u_regs[UREG_FP]; | |
508 | ||
509 | /* 1. Make sure we are not getting garbage from the user */ | |
510 | if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) || | |
511 | (((unsigned long) sf) & 3)) | |
512 | goto segv; | |
513 | ||
514 | get_user(pc, &sf->regs.pc); | |
515 | __get_user(npc, &sf->regs.npc); | |
516 | ||
517 | if ((pc | npc) & 3) | |
518 | goto segv; | |
519 | ||
520 | if (test_thread_flag(TIF_32BIT)) { | |
521 | pc &= 0xffffffff; | |
522 | npc &= 0xffffffff; | |
523 | } | |
524 | regs->tpc = pc; | |
525 | regs->tnpc = npc; | |
526 | ||
527 | /* 2. Restore the state */ | |
528 | err = __get_user(regs->y, &sf->regs.y); | |
529 | err |= __get_user(psr, &sf->regs.psr); | |
530 | ||
531 | for (i = UREG_G1; i <= UREG_I7; i++) | |
532 | err |= __get_user(regs->u_regs[i], &sf->regs.u_regs[i]); | |
533 | if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) { | |
534 | err |= __get_user(i, &sf->v8plus.g_upper[0]); | |
535 | if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) { | |
536 | unsigned long asi; | |
537 | ||
538 | for (i = UREG_G1; i <= UREG_I7; i++) | |
539 | err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]); | |
540 | err |= __get_user(asi, &sf->v8plus.asi); | |
541 | regs->tstate &= ~TSTATE_ASI; | |
542 | regs->tstate |= ((asi & 0xffUL) << 24UL); | |
543 | } | |
544 | } | |
545 | ||
546 | /* User can only change condition codes in %tstate. */ | |
547 | regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); | |
548 | regs->tstate |= psr_to_tstate_icc(psr); | |
549 | ||
550 | err |= __get_user(fpu_save, &sf->fpu_save); | |
551 | if (fpu_save) | |
552 | err |= restore_fpu_state32(regs, &sf->fpu_state); | |
553 | err |= copy_from_user(&seta, &sf->mask, sizeof(compat_sigset_t)); | |
554 | err |= __get_user(u_ss_sp, &sf->stack.ss_sp); | |
555 | st.ss_sp = compat_ptr(u_ss_sp); | |
556 | err |= __get_user(st.ss_flags, &sf->stack.ss_flags); | |
557 | err |= __get_user(st.ss_size, &sf->stack.ss_size); | |
558 | if (err) | |
559 | goto segv; | |
560 | ||
561 | /* It is more difficult to avoid calling this function than to | |
562 | call it and ignore errors. */ | |
563 | old_fs = get_fs(); | |
564 | set_fs(KERNEL_DS); | |
565 | do_sigaltstack((stack_t __user *) &st, NULL, (unsigned long)sf); | |
566 | set_fs(old_fs); | |
567 | ||
568 | switch (_NSIG_WORDS) { | |
569 | case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32); | |
570 | case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32); | |
571 | case 2: set.sig[1] = seta.sig[2] + (((long)seta.sig[3]) << 32); | |
572 | case 1: set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32); | |
573 | } | |
574 | sigdelsetmask(&set, ~_BLOCKABLE); | |
575 | spin_lock_irq(¤t->sighand->siglock); | |
576 | current->blocked = set; | |
577 | recalc_sigpending(); | |
578 | spin_unlock_irq(¤t->sighand->siglock); | |
579 | return; | |
580 | segv: | |
581 | force_sig(SIGSEGV, current); | |
582 | } | |
583 | ||
584 | /* Checks if the fp is valid */ | |
585 | static int invalid_frame_pointer(void __user *fp, int fplen) | |
586 | { | |
587 | if ((((unsigned long) fp) & 7) || ((unsigned long)fp) > 0x100000000ULL - fplen) | |
588 | return 1; | |
589 | return 0; | |
590 | } | |
591 | ||
592 | static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize) | |
593 | { | |
594 | unsigned long sp; | |
595 | ||
596 | regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; | |
597 | sp = regs->u_regs[UREG_FP]; | |
598 | ||
599 | /* This is the X/Open sanctioned signal stack switching. */ | |
600 | if (sa->sa_flags & SA_ONSTACK) { | |
601 | if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7)) | |
602 | sp = current->sas_ss_sp + current->sas_ss_size; | |
603 | } | |
604 | return (void __user *)(sp - framesize); | |
605 | } | |
606 | ||
607 | static void | |
608 | setup_frame32(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *oldset, siginfo_t *info) | |
609 | { | |
610 | struct signal_sframe32 __user *sframep; | |
611 | struct sigcontext32 __user *sc; | |
612 | unsigned int seta[_COMPAT_NSIG_WORDS]; | |
613 | int err = 0; | |
614 | void __user *sig_address; | |
615 | int sig_code; | |
616 | unsigned long pc = regs->tpc; | |
617 | unsigned long npc = regs->tnpc; | |
618 | unsigned int psr; | |
619 | ||
620 | if (test_thread_flag(TIF_32BIT)) { | |
621 | pc &= 0xffffffff; | |
622 | npc &= 0xffffffff; | |
623 | } | |
624 | ||
625 | synchronize_user_stack(); | |
626 | save_and_clear_fpu(); | |
627 | ||
628 | sframep = (struct signal_sframe32 __user *) | |
629 | get_sigframe(sa, regs, SF_ALIGNEDSZ); | |
630 | if (invalid_frame_pointer(sframep, sizeof(*sframep))){ | |
631 | /* Don't change signal code and address, so that | |
632 | * post mortem debuggers can have a look. | |
633 | */ | |
634 | do_exit(SIGILL); | |
635 | } | |
636 | ||
637 | sc = &sframep->sig_context; | |
638 | ||
639 | /* We've already made sure frame pointer isn't in kernel space... */ | |
640 | err = __put_user((sas_ss_flags(regs->u_regs[UREG_FP]) == SS_ONSTACK), | |
641 | &sc->sigc_onstack); | |
642 | ||
643 | switch (_NSIG_WORDS) { | |
644 | case 4: seta[7] = (oldset->sig[3] >> 32); | |
645 | seta[6] = oldset->sig[3]; | |
646 | case 3: seta[5] = (oldset->sig[2] >> 32); | |
647 | seta[4] = oldset->sig[2]; | |
648 | case 2: seta[3] = (oldset->sig[1] >> 32); | |
649 | seta[2] = oldset->sig[1]; | |
650 | case 1: seta[1] = (oldset->sig[0] >> 32); | |
651 | seta[0] = oldset->sig[0]; | |
652 | } | |
653 | err |= __put_user(seta[0], &sc->sigc_mask); | |
654 | err |= __copy_to_user(sframep->extramask, seta + 1, | |
655 | (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); | |
656 | err |= __put_user(regs->u_regs[UREG_FP], &sc->sigc_sp); | |
657 | err |= __put_user(pc, &sc->sigc_pc); | |
658 | err |= __put_user(npc, &sc->sigc_npc); | |
659 | psr = tstate_to_psr(regs->tstate); | |
660 | if (current_thread_info()->fpsaved[0] & FPRS_FEF) | |
661 | psr |= PSR_EF; | |
662 | err |= __put_user(psr, &sc->sigc_psr); | |
663 | err |= __put_user(regs->u_regs[UREG_G1], &sc->sigc_g1); | |
664 | err |= __put_user(regs->u_regs[UREG_I0], &sc->sigc_o0); | |
665 | err |= __put_user(get_thread_wsaved(), &sc->sigc_oswins); | |
666 | ||
667 | err |= copy_in_user((u32 __user *)sframep, | |
668 | (u32 __user *)(regs->u_regs[UREG_FP]), | |
669 | sizeof(struct reg_window32)); | |
670 | ||
671 | set_thread_wsaved(0); /* So process is allowed to execute. */ | |
672 | err |= __put_user(signr, &sframep->sig_num); | |
673 | sig_address = NULL; | |
674 | sig_code = 0; | |
675 | if (SI_FROMKERNEL (info) && (info->si_code & __SI_MASK) == __SI_FAULT) { | |
676 | sig_address = info->si_addr; | |
677 | switch (signr) { | |
678 | case SIGSEGV: | |
679 | switch (info->si_code) { | |
680 | case SEGV_MAPERR: sig_code = SUBSIG_NOMAPPING; break; | |
681 | default: sig_code = SUBSIG_PROTECTION; break; | |
682 | } | |
683 | break; | |
684 | case SIGILL: | |
685 | switch (info->si_code) { | |
686 | case ILL_ILLOPC: sig_code = SUBSIG_ILLINST; break; | |
687 | case ILL_PRVOPC: sig_code = SUBSIG_PRIVINST; break; | |
688 | case ILL_ILLTRP: sig_code = SUBSIG_BADTRAP(info->si_trapno); break; | |
689 | default: sig_code = SUBSIG_STACK; break; | |
690 | } | |
691 | break; | |
692 | case SIGFPE: | |
693 | switch (info->si_code) { | |
694 | case FPE_INTDIV: sig_code = SUBSIG_IDIVZERO; break; | |
695 | case FPE_INTOVF: sig_code = SUBSIG_FPINTOVFL; break; | |
696 | case FPE_FLTDIV: sig_code = SUBSIG_FPDIVZERO; break; | |
697 | case FPE_FLTOVF: sig_code = SUBSIG_FPOVFLOW; break; | |
698 | case FPE_FLTUND: sig_code = SUBSIG_FPUNFLOW; break; | |
699 | case FPE_FLTRES: sig_code = SUBSIG_FPINEXACT; break; | |
700 | case FPE_FLTINV: sig_code = SUBSIG_FPOPERROR; break; | |
701 | default: sig_code = SUBSIG_FPERROR; break; | |
702 | } | |
703 | break; | |
704 | case SIGBUS: | |
705 | switch (info->si_code) { | |
706 | case BUS_ADRALN: sig_code = SUBSIG_ALIGNMENT; break; | |
707 | case BUS_ADRERR: sig_code = SUBSIG_MISCERROR; break; | |
708 | default: sig_code = SUBSIG_BUSTIMEOUT; break; | |
709 | } | |
710 | break; | |
711 | case SIGEMT: | |
712 | switch (info->si_code) { | |
713 | case EMT_TAGOVF: sig_code = SUBSIG_TAG; break; | |
714 | } | |
715 | break; | |
716 | case SIGSYS: | |
717 | if (info->si_code == (__SI_FAULT|0x100)) { | |
718 | /* See sys_sunos32.c */ | |
719 | sig_code = info->si_trapno; | |
720 | break; | |
721 | } | |
722 | default: | |
723 | sig_address = NULL; | |
724 | } | |
725 | } | |
726 | err |= __put_user(ptr_to_compat(sig_address), &sframep->sig_address); | |
727 | err |= __put_user(sig_code, &sframep->sig_code); | |
728 | err |= __put_user(ptr_to_compat(sc), &sframep->sig_scptr); | |
729 | if (err) | |
730 | goto sigsegv; | |
731 | ||
732 | regs->u_regs[UREG_FP] = (unsigned long) sframep; | |
733 | regs->tpc = (unsigned long) sa->sa_handler; | |
734 | regs->tnpc = (regs->tpc + 4); | |
735 | if (test_thread_flag(TIF_32BIT)) { | |
736 | regs->tpc &= 0xffffffff; | |
737 | regs->tnpc &= 0xffffffff; | |
738 | } | |
739 | return; | |
740 | ||
741 | sigsegv: | |
742 | force_sigsegv(signr, current); | |
743 | } | |
744 | ||
745 | ||
746 | static int save_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu) | |
747 | { | |
748 | unsigned long *fpregs = current_thread_info()->fpregs; | |
749 | unsigned long fprs; | |
750 | int err = 0; | |
751 | ||
752 | fprs = current_thread_info()->fpsaved[0]; | |
753 | if (fprs & FPRS_DL) | |
754 | err |= copy_to_user(&fpu->si_float_regs[0], fpregs, | |
755 | (sizeof(unsigned int) * 32)); | |
756 | if (fprs & FPRS_DU) | |
757 | err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16, | |
758 | (sizeof(unsigned int) * 32)); | |
759 | err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr); | |
760 | err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr); | |
761 | err |= __put_user(fprs, &fpu->si_fprs); | |
762 | ||
763 | return err; | |
764 | } | |
765 | ||
766 | static void new_setup_frame32(struct k_sigaction *ka, struct pt_regs *regs, | |
767 | int signo, sigset_t *oldset) | |
768 | { | |
769 | struct new_signal_frame32 __user *sf; | |
770 | int sigframe_size; | |
771 | u32 psr; | |
772 | int i, err; | |
773 | unsigned int seta[_COMPAT_NSIG_WORDS]; | |
774 | ||
775 | /* 1. Make sure everything is clean */ | |
776 | synchronize_user_stack(); | |
777 | save_and_clear_fpu(); | |
778 | ||
779 | sigframe_size = NF_ALIGNEDSZ; | |
780 | if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) | |
781 | sigframe_size -= sizeof(__siginfo_fpu_t); | |
782 | ||
783 | sf = (struct new_signal_frame32 __user *) | |
784 | get_sigframe(&ka->sa, regs, sigframe_size); | |
785 | ||
786 | if (invalid_frame_pointer(sf, sigframe_size)) | |
787 | goto sigill; | |
788 | ||
789 | if (get_thread_wsaved() != 0) | |
790 | goto sigill; | |
791 | ||
792 | /* 2. Save the current process state */ | |
793 | if (test_thread_flag(TIF_32BIT)) { | |
794 | regs->tpc &= 0xffffffff; | |
795 | regs->tnpc &= 0xffffffff; | |
796 | } | |
797 | err = put_user(regs->tpc, &sf->info.si_regs.pc); | |
798 | err |= __put_user(regs->tnpc, &sf->info.si_regs.npc); | |
799 | err |= __put_user(regs->y, &sf->info.si_regs.y); | |
800 | psr = tstate_to_psr(regs->tstate); | |
801 | if (current_thread_info()->fpsaved[0] & FPRS_FEF) | |
802 | psr |= PSR_EF; | |
803 | err |= __put_user(psr, &sf->info.si_regs.psr); | |
804 | for (i = 0; i < 16; i++) | |
805 | err |= __put_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]); | |
806 | err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size); | |
807 | err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]); | |
808 | for (i = 1; i < 16; i++) | |
809 | err |= __put_user(((u32 *)regs->u_regs)[2*i], | |
810 | &sf->v8plus.g_upper[i]); | |
811 | err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL, | |
812 | &sf->v8plus.asi); | |
813 | ||
814 | if (psr & PSR_EF) { | |
815 | err |= save_fpu_state32(regs, &sf->fpu_state); | |
816 | err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save); | |
817 | } else { | |
818 | err |= __put_user(0, &sf->fpu_save); | |
819 | } | |
820 | ||
821 | switch (_NSIG_WORDS) { | |
822 | case 4: seta[7] = (oldset->sig[3] >> 32); | |
823 | seta[6] = oldset->sig[3]; | |
824 | case 3: seta[5] = (oldset->sig[2] >> 32); | |
825 | seta[4] = oldset->sig[2]; | |
826 | case 2: seta[3] = (oldset->sig[1] >> 32); | |
827 | seta[2] = oldset->sig[1]; | |
828 | case 1: seta[1] = (oldset->sig[0] >> 32); | |
829 | seta[0] = oldset->sig[0]; | |
830 | } | |
831 | err |= __put_user(seta[0], &sf->info.si_mask); | |
832 | err |= __copy_to_user(sf->extramask, seta + 1, | |
833 | (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); | |
834 | ||
835 | err |= copy_in_user((u32 __user *)sf, | |
836 | (u32 __user *)(regs->u_regs[UREG_FP]), | |
837 | sizeof(struct reg_window32)); | |
838 | ||
839 | if (err) | |
840 | goto sigsegv; | |
841 | ||
842 | /* 3. signal handler back-trampoline and parameters */ | |
843 | regs->u_regs[UREG_FP] = (unsigned long) sf; | |
844 | regs->u_regs[UREG_I0] = signo; | |
845 | regs->u_regs[UREG_I1] = (unsigned long) &sf->info; | |
846 | regs->u_regs[UREG_I2] = (unsigned long) &sf->info; | |
847 | ||
848 | /* 4. signal handler */ | |
849 | regs->tpc = (unsigned long) ka->sa.sa_handler; | |
850 | regs->tnpc = (regs->tpc + 4); | |
851 | if (test_thread_flag(TIF_32BIT)) { | |
852 | regs->tpc &= 0xffffffff; | |
853 | regs->tnpc &= 0xffffffff; | |
854 | } | |
855 | ||
856 | /* 5. return to kernel instructions */ | |
857 | if (ka->ka_restorer) { | |
858 | regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer; | |
859 | } else { | |
860 | /* Flush instruction space. */ | |
861 | unsigned long address = ((unsigned long)&(sf->insns[0])); | |
862 | pgd_t *pgdp = pgd_offset(current->mm, address); | |
863 | pud_t *pudp = pud_offset(pgdp, address); | |
864 | pmd_t *pmdp = pmd_offset(pudp, address); | |
865 | pte_t *ptep; | |
866 | ||
867 | regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2); | |
868 | ||
869 | err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/ | |
870 | err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/ | |
871 | if (err) | |
872 | goto sigsegv; | |
873 | ||
874 | preempt_disable(); | |
875 | ptep = pte_offset_map(pmdp, address); | |
876 | if (pte_present(*ptep)) { | |
877 | unsigned long page = (unsigned long) | |
878 | page_address(pte_page(*ptep)); | |
879 | ||
4f07118f DM |
880 | wmb(); |
881 | __asm__ __volatile__("flush %0 + %1" | |
882 | : /* no outputs */ | |
883 | : "r" (page), | |
884 | "r" (address & (PAGE_SIZE - 1)) | |
885 | : "memory"); | |
1da177e4 LT |
886 | } |
887 | pte_unmap(ptep); | |
888 | preempt_enable(); | |
889 | } | |
890 | return; | |
891 | ||
892 | sigill: | |
893 | do_exit(SIGILL); | |
894 | sigsegv: | |
895 | force_sigsegv(signo, current); | |
896 | } | |
897 | ||
898 | /* Setup a Solaris stack frame */ | |
899 | static void | |
900 | setup_svr4_frame32(struct sigaction *sa, unsigned long pc, unsigned long npc, | |
901 | struct pt_regs *regs, int signr, sigset_t *oldset) | |
902 | { | |
903 | svr4_signal_frame_t __user *sfp; | |
904 | svr4_gregset_t __user *gr; | |
905 | svr4_siginfo_t __user *si; | |
906 | svr4_mcontext_t __user *mc; | |
907 | svr4_gwindows_t __user *gw; | |
908 | svr4_ucontext_t __user *uc; | |
909 | svr4_sigset_t setv; | |
910 | unsigned int psr; | |
911 | int i, err; | |
912 | ||
913 | synchronize_user_stack(); | |
914 | save_and_clear_fpu(); | |
915 | ||
916 | regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; | |
917 | sfp = (svr4_signal_frame_t __user *) | |
918 | get_sigframe(sa, regs, | |
919 | sizeof(struct reg_window32) + SVR4_SF_ALIGNED); | |
920 | ||
921 | if (invalid_frame_pointer(sfp, sizeof(*sfp))) | |
922 | do_exit(SIGILL); | |
923 | ||
924 | /* Start with a clean frame pointer and fill it */ | |
925 | err = clear_user(sfp, sizeof(*sfp)); | |
926 | ||
927 | /* Setup convenience variables */ | |
928 | si = &sfp->si; | |
929 | uc = &sfp->uc; | |
930 | gw = &sfp->gw; | |
931 | mc = &uc->mcontext; | |
932 | gr = &mc->greg; | |
933 | ||
934 | /* FIXME: where am I supposed to put this? | |
935 | * sc->sigc_onstack = old_status; | |
936 | * anyways, it does not look like it is used for anything at all. | |
937 | */ | |
938 | setv.sigbits[0] = oldset->sig[0]; | |
939 | setv.sigbits[1] = (oldset->sig[0] >> 32); | |
940 | if (_NSIG_WORDS >= 2) { | |
941 | setv.sigbits[2] = oldset->sig[1]; | |
942 | setv.sigbits[3] = (oldset->sig[1] >> 32); | |
943 | err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t)); | |
944 | } else | |
945 | err |= __copy_to_user(&uc->sigmask, &setv, | |
946 | 2 * sizeof(unsigned int)); | |
947 | ||
948 | /* Store registers */ | |
949 | if (test_thread_flag(TIF_32BIT)) { | |
950 | regs->tpc &= 0xffffffff; | |
951 | regs->tnpc &= 0xffffffff; | |
952 | } | |
953 | err |= __put_user(regs->tpc, &((*gr)[SVR4_PC])); | |
954 | err |= __put_user(regs->tnpc, &((*gr)[SVR4_NPC])); | |
955 | psr = tstate_to_psr(regs->tstate); | |
956 | if (current_thread_info()->fpsaved[0] & FPRS_FEF) | |
957 | psr |= PSR_EF; | |
958 | err |= __put_user(psr, &((*gr)[SVR4_PSR])); | |
959 | err |= __put_user(regs->y, &((*gr)[SVR4_Y])); | |
960 | ||
961 | /* Copy g[1..7] and o[0..7] registers */ | |
962 | for (i = 0; i < 7; i++) | |
963 | err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i); | |
964 | for (i = 0; i < 8; i++) | |
965 | err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i); | |
966 | ||
967 | /* Setup sigaltstack */ | |
968 | err |= __put_user(current->sas_ss_sp, &uc->stack.sp); | |
969 | err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags); | |
970 | err |= __put_user(current->sas_ss_size, &uc->stack.size); | |
971 | ||
972 | /* Save the currently window file: */ | |
973 | ||
974 | /* 1. Link sfp->uc->gwins to our windows */ | |
975 | err |= __put_user(ptr_to_compat(gw), &mc->gwin); | |
976 | ||
977 | /* 2. Number of windows to restore at setcontext (): */ | |
978 | err |= __put_user(get_thread_wsaved(), &gw->count); | |
979 | ||
980 | /* 3. We just pay attention to the gw->count field on setcontext */ | |
981 | set_thread_wsaved(0); /* So process is allowed to execute. */ | |
982 | ||
983 | /* Setup the signal information. Solaris expects a bunch of | |
984 | * information to be passed to the signal handler, we don't provide | |
985 | * that much currently, should use siginfo. | |
986 | */ | |
987 | err |= __put_user(signr, &si->siginfo.signo); | |
988 | err |= __put_user(SVR4_SINOINFO, &si->siginfo.code); | |
989 | if (err) | |
990 | goto sigsegv; | |
991 | ||
992 | regs->u_regs[UREG_FP] = (unsigned long) sfp; | |
993 | regs->tpc = (unsigned long) sa->sa_handler; | |
994 | regs->tnpc = (regs->tpc + 4); | |
995 | if (test_thread_flag(TIF_32BIT)) { | |
996 | regs->tpc &= 0xffffffff; | |
997 | regs->tnpc &= 0xffffffff; | |
998 | } | |
999 | ||
1000 | /* Arguments passed to signal handler */ | |
1001 | if (regs->u_regs[14]){ | |
1002 | struct reg_window32 __user *rw = (struct reg_window32 __user *) | |
1003 | (regs->u_regs[14] & 0x00000000ffffffffUL); | |
1004 | ||
1005 | err |= __put_user(signr, &rw->ins[0]); | |
1006 | err |= __put_user((u64)si, &rw->ins[1]); | |
1007 | err |= __put_user((u64)uc, &rw->ins[2]); | |
1008 | err |= __put_user((u64)sfp, &rw->ins[6]); /* frame pointer */ | |
1009 | if (err) | |
1010 | goto sigsegv; | |
1011 | ||
1012 | regs->u_regs[UREG_I0] = signr; | |
1013 | regs->u_regs[UREG_I1] = (u32)(u64) si; | |
1014 | regs->u_regs[UREG_I2] = (u32)(u64) uc; | |
1015 | } | |
1016 | return; | |
1017 | ||
1018 | sigsegv: | |
1019 | force_sigsegv(signr, current); | |
1020 | } | |
1021 | ||
1022 | asmlinkage int | |
1023 | svr4_getcontext(svr4_ucontext_t __user *uc, struct pt_regs *regs) | |
1024 | { | |
1025 | svr4_gregset_t __user *gr; | |
1026 | svr4_mcontext_t __user *mc; | |
1027 | svr4_sigset_t setv; | |
1028 | int i, err; | |
1029 | u32 psr; | |
1030 | ||
1031 | synchronize_user_stack(); | |
1032 | save_and_clear_fpu(); | |
1033 | ||
1034 | if (get_thread_wsaved()) | |
1035 | do_exit(SIGSEGV); | |
1036 | ||
1037 | err = clear_user(uc, sizeof(*uc)); | |
1038 | ||
1039 | /* Setup convenience variables */ | |
1040 | mc = &uc->mcontext; | |
1041 | gr = &mc->greg; | |
1042 | ||
1043 | setv.sigbits[0] = current->blocked.sig[0]; | |
1044 | setv.sigbits[1] = (current->blocked.sig[0] >> 32); | |
1045 | if (_NSIG_WORDS >= 2) { | |
1046 | setv.sigbits[2] = current->blocked.sig[1]; | |
1047 | setv.sigbits[3] = (current->blocked.sig[1] >> 32); | |
1048 | err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t)); | |
1049 | } else | |
1050 | err |= __copy_to_user(&uc->sigmask, &setv, 2 * sizeof(unsigned)); | |
1051 | ||
1052 | /* Store registers */ | |
1053 | if (test_thread_flag(TIF_32BIT)) { | |
1054 | regs->tpc &= 0xffffffff; | |
1055 | regs->tnpc &= 0xffffffff; | |
1056 | } | |
1057 | err |= __put_user(regs->tpc, &uc->mcontext.greg[SVR4_PC]); | |
1058 | err |= __put_user(regs->tnpc, &uc->mcontext.greg[SVR4_NPC]); | |
1059 | ||
1060 | psr = tstate_to_psr(regs->tstate) & ~PSR_EF; | |
1061 | if (current_thread_info()->fpsaved[0] & FPRS_FEF) | |
1062 | psr |= PSR_EF; | |
1063 | err |= __put_user(psr, &uc->mcontext.greg[SVR4_PSR]); | |
1064 | ||
1065 | err |= __put_user(regs->y, &uc->mcontext.greg[SVR4_Y]); | |
1066 | ||
1067 | /* Copy g[1..7] and o[0..7] registers */ | |
1068 | for (i = 0; i < 7; i++) | |
1069 | err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i); | |
1070 | for (i = 0; i < 8; i++) | |
1071 | err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i); | |
1072 | ||
1073 | /* Setup sigaltstack */ | |
1074 | err |= __put_user(current->sas_ss_sp, &uc->stack.sp); | |
1075 | err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags); | |
1076 | err |= __put_user(current->sas_ss_size, &uc->stack.size); | |
1077 | ||
1078 | /* The register file is not saved | |
1079 | * we have already stuffed all of it with sync_user_stack | |
1080 | */ | |
1081 | return (err ? -EFAULT : 0); | |
1082 | } | |
1083 | ||
1084 | ||
1085 | /* Set the context for a svr4 application, this is Solaris way to sigreturn */ | |
1086 | asmlinkage int svr4_setcontext(svr4_ucontext_t __user *c, struct pt_regs *regs) | |
1087 | { | |
1088 | svr4_gregset_t __user *gr; | |
1089 | mm_segment_t old_fs; | |
1090 | u32 pc, npc, psr, u_ss_sp; | |
1091 | sigset_t set; | |
1092 | svr4_sigset_t setv; | |
1093 | int i, err; | |
1094 | stack_t st; | |
1095 | ||
1096 | /* Fixme: restore windows, or is this already taken care of in | |
1097 | * svr4_setup_frame when sync_user_windows is done? | |
1098 | */ | |
1099 | flush_user_windows(); | |
1100 | ||
1101 | if (get_thread_wsaved()) | |
1102 | goto sigsegv; | |
1103 | ||
1104 | if (((unsigned long) c) & 3){ | |
1105 | printk("Unaligned structure passed\n"); | |
1106 | goto sigsegv; | |
1107 | } | |
1108 | ||
1109 | if (!__access_ok(c, sizeof(*c))) { | |
1110 | /* Miguel, add nice debugging msg _here_. ;-) */ | |
1111 | goto sigsegv; | |
1112 | } | |
1113 | ||
1114 | /* Check for valid PC and nPC */ | |
1115 | gr = &c->mcontext.greg; | |
1116 | err = __get_user(pc, &((*gr)[SVR4_PC])); | |
1117 | err |= __get_user(npc, &((*gr)[SVR4_NPC])); | |
1118 | if ((pc | npc) & 3) | |
1119 | goto sigsegv; | |
1120 | ||
1121 | /* Retrieve information from passed ucontext */ | |
1122 | /* note that nPC is ored a 1, this is used to inform entry.S */ | |
1123 | /* that we don't want it to mess with our PC and nPC */ | |
1124 | ||
1125 | err |= copy_from_user(&setv, &c->sigmask, sizeof(svr4_sigset_t)); | |
1126 | set.sig[0] = setv.sigbits[0] | (((long)setv.sigbits[1]) << 32); | |
1127 | if (_NSIG_WORDS >= 2) | |
1128 | set.sig[1] = setv.sigbits[2] | (((long)setv.sigbits[3]) << 32); | |
1129 | ||
1130 | err |= __get_user(u_ss_sp, &c->stack.sp); | |
1131 | st.ss_sp = compat_ptr(u_ss_sp); | |
1132 | err |= __get_user(st.ss_flags, &c->stack.flags); | |
1133 | err |= __get_user(st.ss_size, &c->stack.size); | |
1134 | if (err) | |
1135 | goto sigsegv; | |
1136 | ||
1137 | /* It is more difficult to avoid calling this function than to | |
1138 | call it and ignore errors. */ | |
1139 | old_fs = get_fs(); | |
1140 | set_fs(KERNEL_DS); | |
1141 | do_sigaltstack((stack_t __user *) &st, NULL, regs->u_regs[UREG_I6]); | |
1142 | set_fs(old_fs); | |
1143 | ||
1144 | sigdelsetmask(&set, ~_BLOCKABLE); | |
1145 | spin_lock_irq(¤t->sighand->siglock); | |
1146 | current->blocked = set; | |
1147 | recalc_sigpending(); | |
1148 | spin_unlock_irq(¤t->sighand->siglock); | |
1149 | regs->tpc = pc; | |
1150 | regs->tnpc = npc | 1; | |
1151 | if (test_thread_flag(TIF_32BIT)) { | |
1152 | regs->tpc &= 0xffffffff; | |
1153 | regs->tnpc &= 0xffffffff; | |
1154 | } | |
1155 | err |= __get_user(regs->y, &((*gr)[SVR4_Y])); | |
1156 | err |= __get_user(psr, &((*gr)[SVR4_PSR])); | |
1157 | regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); | |
1158 | regs->tstate |= psr_to_tstate_icc(psr); | |
1159 | ||
1160 | /* Restore g[1..7] and o[0..7] registers */ | |
1161 | for (i = 0; i < 7; i++) | |
1162 | err |= __get_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i); | |
1163 | for (i = 0; i < 8; i++) | |
1164 | err |= __get_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i); | |
1165 | if (err) | |
1166 | goto sigsegv; | |
1167 | ||
1168 | return -EINTR; | |
1169 | sigsegv: | |
1170 | return -EFAULT; | |
1171 | } | |
1172 | ||
1173 | static void setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs, | |
1174 | unsigned long signr, sigset_t *oldset, | |
1175 | siginfo_t *info) | |
1176 | { | |
1177 | struct rt_signal_frame32 __user *sf; | |
1178 | int sigframe_size; | |
1179 | u32 psr; | |
1180 | int i, err; | |
1181 | compat_sigset_t seta; | |
1182 | ||
1183 | /* 1. Make sure everything is clean */ | |
1184 | synchronize_user_stack(); | |
1185 | save_and_clear_fpu(); | |
1186 | ||
1187 | sigframe_size = RT_ALIGNEDSZ; | |
1188 | if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) | |
1189 | sigframe_size -= sizeof(__siginfo_fpu_t); | |
1190 | ||
1191 | sf = (struct rt_signal_frame32 __user *) | |
1192 | get_sigframe(&ka->sa, regs, sigframe_size); | |
1193 | ||
1194 | if (invalid_frame_pointer(sf, sigframe_size)) | |
1195 | goto sigill; | |
1196 | ||
1197 | if (get_thread_wsaved() != 0) | |
1198 | goto sigill; | |
1199 | ||
1200 | /* 2. Save the current process state */ | |
1201 | if (test_thread_flag(TIF_32BIT)) { | |
1202 | regs->tpc &= 0xffffffff; | |
1203 | regs->tnpc &= 0xffffffff; | |
1204 | } | |
1205 | err = put_user(regs->tpc, &sf->regs.pc); | |
1206 | err |= __put_user(regs->tnpc, &sf->regs.npc); | |
1207 | err |= __put_user(regs->y, &sf->regs.y); | |
1208 | psr = tstate_to_psr(regs->tstate); | |
1209 | if (current_thread_info()->fpsaved[0] & FPRS_FEF) | |
1210 | psr |= PSR_EF; | |
1211 | err |= __put_user(psr, &sf->regs.psr); | |
1212 | for (i = 0; i < 16; i++) | |
1213 | err |= __put_user(regs->u_regs[i], &sf->regs.u_regs[i]); | |
1214 | err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size); | |
1215 | err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]); | |
1216 | for (i = 1; i < 16; i++) | |
1217 | err |= __put_user(((u32 *)regs->u_regs)[2*i], | |
1218 | &sf->v8plus.g_upper[i]); | |
1219 | err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL, | |
1220 | &sf->v8plus.asi); | |
1221 | ||
1222 | if (psr & PSR_EF) { | |
1223 | err |= save_fpu_state32(regs, &sf->fpu_state); | |
1224 | err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save); | |
1225 | } else { | |
1226 | err |= __put_user(0, &sf->fpu_save); | |
1227 | } | |
1228 | ||
1229 | /* Update the siginfo structure. */ | |
1230 | err |= copy_siginfo_to_user32(&sf->info, info); | |
1231 | ||
1232 | /* Setup sigaltstack */ | |
1233 | err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp); | |
1234 | err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags); | |
1235 | err |= __put_user(current->sas_ss_size, &sf->stack.ss_size); | |
1236 | ||
1237 | switch (_NSIG_WORDS) { | |
1238 | case 4: seta.sig[7] = (oldset->sig[3] >> 32); | |
1239 | seta.sig[6] = oldset->sig[3]; | |
1240 | case 3: seta.sig[5] = (oldset->sig[2] >> 32); | |
1241 | seta.sig[4] = oldset->sig[2]; | |
1242 | case 2: seta.sig[3] = (oldset->sig[1] >> 32); | |
1243 | seta.sig[2] = oldset->sig[1]; | |
1244 | case 1: seta.sig[1] = (oldset->sig[0] >> 32); | |
1245 | seta.sig[0] = oldset->sig[0]; | |
1246 | } | |
1247 | err |= __copy_to_user(&sf->mask, &seta, sizeof(compat_sigset_t)); | |
1248 | ||
1249 | err |= copy_in_user((u32 __user *)sf, | |
1250 | (u32 __user *)(regs->u_regs[UREG_FP]), | |
1251 | sizeof(struct reg_window32)); | |
1252 | if (err) | |
1253 | goto sigsegv; | |
1254 | ||
1255 | /* 3. signal handler back-trampoline and parameters */ | |
1256 | regs->u_regs[UREG_FP] = (unsigned long) sf; | |
1257 | regs->u_regs[UREG_I0] = signr; | |
1258 | regs->u_regs[UREG_I1] = (unsigned long) &sf->info; | |
1259 | regs->u_regs[UREG_I2] = (unsigned long) &sf->regs; | |
1260 | ||
1261 | /* 4. signal handler */ | |
1262 | regs->tpc = (unsigned long) ka->sa.sa_handler; | |
1263 | regs->tnpc = (regs->tpc + 4); | |
1264 | if (test_thread_flag(TIF_32BIT)) { | |
1265 | regs->tpc &= 0xffffffff; | |
1266 | regs->tnpc &= 0xffffffff; | |
1267 | } | |
1268 | ||
1269 | /* 5. return to kernel instructions */ | |
1270 | if (ka->ka_restorer) | |
1271 | regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer; | |
1272 | else { | |
1273 | /* Flush instruction space. */ | |
1274 | unsigned long address = ((unsigned long)&(sf->insns[0])); | |
1275 | pgd_t *pgdp = pgd_offset(current->mm, address); | |
1276 | pud_t *pudp = pud_offset(pgdp, address); | |
1277 | pmd_t *pmdp = pmd_offset(pudp, address); | |
1278 | pte_t *ptep; | |
1279 | ||
1280 | regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2); | |
1281 | ||
1282 | /* mov __NR_rt_sigreturn, %g1 */ | |
1283 | err |= __put_user(0x82102065, &sf->insns[0]); | |
1284 | ||
1285 | /* t 0x10 */ | |
1286 | err |= __put_user(0x91d02010, &sf->insns[1]); | |
1287 | if (err) | |
1288 | goto sigsegv; | |
1289 | ||
1290 | preempt_disable(); | |
1291 | ptep = pte_offset_map(pmdp, address); | |
1292 | if (pte_present(*ptep)) { | |
1293 | unsigned long page = (unsigned long) | |
1294 | page_address(pte_page(*ptep)); | |
1295 | ||
4f07118f DM |
1296 | wmb(); |
1297 | __asm__ __volatile__("flush %0 + %1" | |
1298 | : /* no outputs */ | |
1299 | : "r" (page), | |
1300 | "r" (address & (PAGE_SIZE - 1)) | |
1301 | : "memory"); | |
1da177e4 LT |
1302 | } |
1303 | pte_unmap(ptep); | |
1304 | preempt_enable(); | |
1305 | } | |
1306 | return; | |
1307 | ||
1308 | sigill: | |
1309 | do_exit(SIGILL); | |
1310 | sigsegv: | |
1311 | force_sigsegv(signr, current); | |
1312 | } | |
1313 | ||
1314 | static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka, | |
1315 | siginfo_t *info, | |
1316 | sigset_t *oldset, struct pt_regs *regs, | |
1317 | int svr4_signal) | |
1318 | { | |
1319 | if (svr4_signal) | |
1320 | setup_svr4_frame32(&ka->sa, regs->tpc, regs->tnpc, | |
1321 | regs, signr, oldset); | |
1322 | else { | |
1323 | if (ka->sa.sa_flags & SA_SIGINFO) | |
1324 | setup_rt_frame32(ka, regs, signr, oldset, info); | |
1325 | else if (test_thread_flag(TIF_NEWSIGNALS)) | |
1326 | new_setup_frame32(ka, regs, signr, oldset); | |
1327 | else | |
1328 | setup_frame32(&ka->sa, regs, signr, oldset, info); | |
1329 | } | |
69be8f18 SR |
1330 | spin_lock_irq(¤t->sighand->siglock); |
1331 | sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); | |
1332 | if (!(ka->sa.sa_flags & SA_NOMASK)) | |
1da177e4 | 1333 | sigaddset(¤t->blocked,signr); |
69be8f18 SR |
1334 | recalc_sigpending(); |
1335 | spin_unlock_irq(¤t->sighand->siglock); | |
1da177e4 LT |
1336 | } |
1337 | ||
1338 | static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs, | |
1339 | struct sigaction *sa) | |
1340 | { | |
1341 | switch (regs->u_regs[UREG_I0]) { | |
1342 | case ERESTART_RESTARTBLOCK: | |
1343 | case ERESTARTNOHAND: | |
1344 | no_system_call_restart: | |
1345 | regs->u_regs[UREG_I0] = EINTR; | |
1346 | regs->tstate |= TSTATE_ICARRY; | |
1347 | break; | |
1348 | case ERESTARTSYS: | |
1349 | if (!(sa->sa_flags & SA_RESTART)) | |
1350 | goto no_system_call_restart; | |
1351 | /* fallthrough */ | |
1352 | case ERESTARTNOINTR: | |
1353 | regs->u_regs[UREG_I0] = orig_i0; | |
1354 | regs->tpc -= 4; | |
1355 | regs->tnpc -= 4; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | /* Note that 'init' is a special process: it doesn't get signals it doesn't | |
1360 | * want to handle. Thus you cannot kill init even with a SIGKILL even by | |
1361 | * mistake. | |
1362 | */ | |
1363 | int do_signal32(sigset_t *oldset, struct pt_regs * regs, | |
1364 | unsigned long orig_i0, int restart_syscall) | |
1365 | { | |
1366 | siginfo_t info; | |
1367 | struct signal_deliver_cookie cookie; | |
1368 | struct k_sigaction ka; | |
1369 | int signr; | |
1370 | int svr4_signal = current->personality == PER_SVR4; | |
1371 | ||
1372 | cookie.restart_syscall = restart_syscall; | |
1373 | cookie.orig_i0 = orig_i0; | |
1374 | ||
1375 | signr = get_signal_to_deliver(&info, &ka, regs, &cookie); | |
1376 | if (signr > 0) { | |
1377 | if (cookie.restart_syscall) | |
1378 | syscall_restart32(orig_i0, regs, &ka.sa); | |
1379 | handle_signal32(signr, &ka, &info, oldset, | |
1380 | regs, svr4_signal); | |
1381 | return 1; | |
1382 | } | |
1383 | if (cookie.restart_syscall && | |
1384 | (regs->u_regs[UREG_I0] == ERESTARTNOHAND || | |
1385 | regs->u_regs[UREG_I0] == ERESTARTSYS || | |
1386 | regs->u_regs[UREG_I0] == ERESTARTNOINTR)) { | |
1387 | /* replay the system call when we are done */ | |
1388 | regs->u_regs[UREG_I0] = cookie.orig_i0; | |
1389 | regs->tpc -= 4; | |
1390 | regs->tnpc -= 4; | |
1391 | } | |
1392 | if (cookie.restart_syscall && | |
1393 | regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) { | |
1394 | regs->u_regs[UREG_G1] = __NR_restart_syscall; | |
1395 | regs->tpc -= 4; | |
1396 | regs->tnpc -= 4; | |
1397 | } | |
1398 | return 0; | |
1399 | } | |
1400 | ||
1401 | struct sigstack32 { | |
1402 | u32 the_stack; | |
1403 | int cur_status; | |
1404 | }; | |
1405 | ||
1406 | asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp) | |
1407 | { | |
1408 | struct sigstack32 __user *ssptr = | |
1409 | (struct sigstack32 __user *)((unsigned long)(u_ssptr)); | |
1410 | struct sigstack32 __user *ossptr = | |
1411 | (struct sigstack32 __user *)((unsigned long)(u_ossptr)); | |
1412 | int ret = -EFAULT; | |
1413 | ||
1414 | /* First see if old state is wanted. */ | |
1415 | if (ossptr) { | |
1416 | if (put_user(current->sas_ss_sp + current->sas_ss_size, | |
1417 | &ossptr->the_stack) || | |
1418 | __put_user(on_sig_stack(sp), &ossptr->cur_status)) | |
1419 | goto out; | |
1420 | } | |
1421 | ||
1422 | /* Now see if we want to update the new state. */ | |
1423 | if (ssptr) { | |
1424 | u32 ss_sp; | |
1425 | ||
1426 | if (get_user(ss_sp, &ssptr->the_stack)) | |
1427 | goto out; | |
1428 | ||
1429 | /* If the current stack was set with sigaltstack, don't | |
1430 | * swap stacks while we are on it. | |
1431 | */ | |
1432 | ret = -EPERM; | |
1433 | if (current->sas_ss_sp && on_sig_stack(sp)) | |
1434 | goto out; | |
1435 | ||
1436 | /* Since we don't know the extent of the stack, and we don't | |
1437 | * track onstack-ness, but rather calculate it, we must | |
1438 | * presume a size. Ho hum this interface is lossy. | |
1439 | */ | |
1440 | current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; | |
1441 | current->sas_ss_size = SIGSTKSZ; | |
1442 | } | |
1443 | ||
1444 | ret = 0; | |
1445 | out: | |
1446 | return ret; | |
1447 | } | |
1448 | ||
1449 | asmlinkage long do_sys32_sigaltstack(u32 ussa, u32 uossa, unsigned long sp) | |
1450 | { | |
1451 | stack_t uss, uoss; | |
1452 | u32 u_ss_sp = 0; | |
1453 | int ret; | |
1454 | mm_segment_t old_fs; | |
1455 | stack_t32 __user *uss32 = compat_ptr(ussa); | |
1456 | stack_t32 __user *uoss32 = compat_ptr(uossa); | |
1457 | ||
1458 | if (ussa && (get_user(u_ss_sp, &uss32->ss_sp) || | |
1459 | __get_user(uss.ss_flags, &uss32->ss_flags) || | |
1460 | __get_user(uss.ss_size, &uss32->ss_size))) | |
1461 | return -EFAULT; | |
1462 | uss.ss_sp = compat_ptr(u_ss_sp); | |
1463 | old_fs = get_fs(); | |
1464 | set_fs(KERNEL_DS); | |
1465 | ret = do_sigaltstack(ussa ? (stack_t __user *) &uss : NULL, | |
1466 | uossa ? (stack_t __user *) &uoss : NULL, sp); | |
1467 | set_fs(old_fs); | |
1468 | if (!ret && uossa && (put_user(ptr_to_compat(uoss.ss_sp), &uoss32->ss_sp) || | |
1469 | __put_user(uoss.ss_flags, &uoss32->ss_flags) || | |
1470 | __put_user(uoss.ss_size, &uoss32->ss_size))) | |
1471 | return -EFAULT; | |
1472 | return ret; | |
1473 | } |