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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> | |
1da177e4 LT |
20 | #include <linux/binfmts.h> |
21 | #include <linux/compat.h> | |
22 | #include <linux/bitops.h> | |
23 | ||
24 | #include <asm/uaccess.h> | |
25 | #include <asm/ptrace.h> | |
26 | #include <asm/svr4.h> | |
27 | #include <asm/pgtable.h> | |
28 | #include <asm/psrcompat.h> | |
29 | #include <asm/fpumacro.h> | |
30 | #include <asm/visasm.h> | |
14cc6aba | 31 | #include <asm/compat_signal.h> |
1da177e4 LT |
32 | |
33 | #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) | |
34 | ||
1da177e4 LT |
35 | /* Signal frames: the original one (compatible with SunOS): |
36 | * | |
37 | * Set up a signal frame... Make the stack look the way SunOS | |
38 | * expects it to look which is basically: | |
39 | * | |
40 | * ---------------------------------- <-- %sp at signal time | |
41 | * Struct sigcontext | |
42 | * Signal address | |
43 | * Ptr to sigcontext area above | |
44 | * Signal code | |
45 | * The signal number itself | |
46 | * One register window | |
47 | * ---------------------------------- <-- New %sp | |
48 | */ | |
49 | struct signal_sframe32 { | |
50 | struct reg_window32 sig_window; | |
51 | int sig_num; | |
52 | int sig_code; | |
53 | /* struct sigcontext32 * */ u32 sig_scptr; | |
54 | int sig_address; | |
55 | struct sigcontext32 sig_context; | |
56 | unsigned int extramask[_COMPAT_NSIG_WORDS - 1]; | |
57 | }; | |
58 | ||
59 | /* This magic should be in g_upper[0] for all upper parts | |
60 | * to be valid. | |
61 | */ | |
62 | #define SIGINFO_EXTRA_V8PLUS_MAGIC 0x130e269 | |
63 | typedef struct { | |
64 | unsigned int g_upper[8]; | |
65 | unsigned int o_upper[8]; | |
66 | unsigned int asi; | |
67 | } siginfo_extra_v8plus_t; | |
68 | ||
69 | /* | |
70 | * And the new one, intended to be used for Linux applications only | |
71 | * (we have enough in there to work with clone). | |
72 | * All the interesting bits are in the info field. | |
73 | */ | |
74 | struct new_signal_frame32 { | |
75 | struct sparc_stackf32 ss; | |
76 | __siginfo32_t info; | |
77 | /* __siginfo_fpu32_t * */ u32 fpu_save; | |
78 | unsigned int insns[2]; | |
79 | unsigned int extramask[_COMPAT_NSIG_WORDS - 1]; | |
80 | unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */ | |
81 | /* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */ | |
82 | siginfo_extra_v8plus_t v8plus; | |
83 | __siginfo_fpu_t fpu_state; | |
84 | }; | |
85 | ||
86 | typedef struct compat_siginfo{ | |
87 | int si_signo; | |
88 | int si_errno; | |
89 | int si_code; | |
90 | ||
91 | union { | |
92 | int _pad[SI_PAD_SIZE32]; | |
93 | ||
94 | /* kill() */ | |
95 | struct { | |
96 | compat_pid_t _pid; /* sender's pid */ | |
97 | unsigned int _uid; /* sender's uid */ | |
98 | } _kill; | |
99 | ||
100 | /* POSIX.1b timers */ | |
101 | struct { | |
0d77e5a2 | 102 | compat_timer_t _tid; /* timer id */ |
1da177e4 LT |
103 | int _overrun; /* overrun count */ |
104 | compat_sigval_t _sigval; /* same as below */ | |
105 | int _sys_private; /* not to be passed to user */ | |
106 | } _timer; | |
107 | ||
108 | /* POSIX.1b signals */ | |
109 | struct { | |
110 | compat_pid_t _pid; /* sender's pid */ | |
111 | unsigned int _uid; /* sender's uid */ | |
112 | compat_sigval_t _sigval; | |
113 | } _rt; | |
114 | ||
115 | /* SIGCHLD */ | |
116 | struct { | |
117 | compat_pid_t _pid; /* which child */ | |
118 | unsigned int _uid; /* sender's uid */ | |
119 | int _status; /* exit code */ | |
120 | compat_clock_t _utime; | |
121 | compat_clock_t _stime; | |
122 | } _sigchld; | |
123 | ||
124 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */ | |
125 | struct { | |
126 | u32 _addr; /* faulting insn/memory ref. */ | |
127 | int _trapno; | |
128 | } _sigfault; | |
129 | ||
130 | /* SIGPOLL */ | |
131 | struct { | |
132 | int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ | |
133 | int _fd; | |
134 | } _sigpoll; | |
135 | } _sifields; | |
136 | }compat_siginfo_t; | |
137 | ||
138 | struct rt_signal_frame32 { | |
139 | struct sparc_stackf32 ss; | |
140 | compat_siginfo_t info; | |
141 | struct pt_regs32 regs; | |
142 | compat_sigset_t mask; | |
143 | /* __siginfo_fpu32_t * */ u32 fpu_save; | |
144 | unsigned int insns[2]; | |
145 | stack_t32 stack; | |
146 | unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */ | |
147 | /* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */ | |
148 | siginfo_extra_v8plus_t v8plus; | |
149 | __siginfo_fpu_t fpu_state; | |
150 | }; | |
151 | ||
152 | /* Align macros */ | |
153 | #define SF_ALIGNEDSZ (((sizeof(struct signal_sframe32) + 7) & (~7))) | |
154 | #define NF_ALIGNEDSZ (((sizeof(struct new_signal_frame32) + 7) & (~7))) | |
155 | #define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame32) + 7) & (~7))) | |
156 | ||
157 | int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) | |
158 | { | |
159 | int err; | |
160 | ||
161 | if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t))) | |
162 | return -EFAULT; | |
163 | ||
164 | /* If you change siginfo_t structure, please be sure | |
165 | this code is fixed accordingly. | |
166 | It should never copy any pad contained in the structure | |
167 | to avoid security leaks, but must copy the generic | |
168 | 3 ints plus the relevant union member. | |
169 | This routine must convert siginfo from 64bit to 32bit as well | |
170 | at the same time. */ | |
171 | err = __put_user(from->si_signo, &to->si_signo); | |
172 | err |= __put_user(from->si_errno, &to->si_errno); | |
173 | err |= __put_user((short)from->si_code, &to->si_code); | |
174 | if (from->si_code < 0) | |
175 | err |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); | |
176 | else { | |
177 | switch (from->si_code >> 16) { | |
178 | case __SI_TIMER >> 16: | |
179 | err |= __put_user(from->si_tid, &to->si_tid); | |
180 | err |= __put_user(from->si_overrun, &to->si_overrun); | |
181 | err |= __put_user(from->si_int, &to->si_int); | |
182 | break; | |
183 | case __SI_CHLD >> 16: | |
184 | err |= __put_user(from->si_utime, &to->si_utime); | |
185 | err |= __put_user(from->si_stime, &to->si_stime); | |
186 | err |= __put_user(from->si_status, &to->si_status); | |
187 | default: | |
188 | err |= __put_user(from->si_pid, &to->si_pid); | |
189 | err |= __put_user(from->si_uid, &to->si_uid); | |
190 | break; | |
191 | case __SI_FAULT >> 16: | |
1da177e4 LT |
192 | err |= __put_user(from->si_trapno, &to->si_trapno); |
193 | err |= __put_user((unsigned long)from->si_addr, &to->si_addr); | |
194 | break; | |
9c7d3b3a JS |
195 | case __SI_POLL >> 16: |
196 | err |= __put_user(from->si_band, &to->si_band); | |
197 | err |= __put_user(from->si_fd, &to->si_fd); | |
198 | break; | |
1da177e4 LT |
199 | case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ |
200 | case __SI_MESGQ >> 16: | |
201 | err |= __put_user(from->si_pid, &to->si_pid); | |
202 | err |= __put_user(from->si_uid, &to->si_uid); | |
203 | err |= __put_user(from->si_int, &to->si_int); | |
204 | break; | |
205 | } | |
206 | } | |
207 | return err; | |
208 | } | |
209 | ||
210 | /* CAUTION: This is just a very minimalist implementation for the | |
211 | * sake of compat_sys_rt_sigqueueinfo() | |
212 | */ | |
213 | int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) | |
214 | { | |
215 | if (!access_ok(VERIFY_WRITE, from, sizeof(compat_siginfo_t))) | |
216 | return -EFAULT; | |
217 | ||
218 | if (copy_from_user(to, from, 3*sizeof(int)) || | |
219 | copy_from_user(to->_sifields._pad, from->_sifields._pad, | |
220 | SI_PAD_SIZE)) | |
221 | return -EFAULT; | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
1da177e4 LT |
226 | static int restore_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu) |
227 | { | |
228 | unsigned long *fpregs = current_thread_info()->fpregs; | |
229 | unsigned long fprs; | |
230 | int err; | |
231 | ||
232 | err = __get_user(fprs, &fpu->si_fprs); | |
233 | fprs_write(0); | |
234 | regs->tstate &= ~TSTATE_PEF; | |
235 | if (fprs & FPRS_DL) | |
236 | err |= copy_from_user(fpregs, &fpu->si_float_regs[0], (sizeof(unsigned int) * 32)); | |
237 | if (fprs & FPRS_DU) | |
238 | err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32], (sizeof(unsigned int) * 32)); | |
239 | err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr); | |
240 | err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr); | |
241 | current_thread_info()->fpsaved[0] |= fprs; | |
242 | return err; | |
243 | } | |
244 | ||
245 | void do_new_sigreturn32(struct pt_regs *regs) | |
246 | { | |
247 | struct new_signal_frame32 __user *sf; | |
248 | unsigned int psr; | |
249 | unsigned pc, npc, fpu_save; | |
250 | sigset_t set; | |
251 | unsigned seta[_COMPAT_NSIG_WORDS]; | |
252 | int err, i; | |
253 | ||
254 | regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; | |
255 | sf = (struct new_signal_frame32 __user *) regs->u_regs[UREG_FP]; | |
256 | ||
257 | /* 1. Make sure we are not getting garbage from the user */ | |
258 | if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) || | |
259 | (((unsigned long) sf) & 3)) | |
260 | goto segv; | |
261 | ||
262 | get_user(pc, &sf->info.si_regs.pc); | |
263 | __get_user(npc, &sf->info.si_regs.npc); | |
264 | ||
265 | if ((pc | npc) & 3) | |
266 | goto segv; | |
267 | ||
268 | if (test_thread_flag(TIF_32BIT)) { | |
269 | pc &= 0xffffffff; | |
270 | npc &= 0xffffffff; | |
271 | } | |
272 | regs->tpc = pc; | |
273 | regs->tnpc = npc; | |
274 | ||
275 | /* 2. Restore the state */ | |
276 | err = __get_user(regs->y, &sf->info.si_regs.y); | |
277 | err |= __get_user(psr, &sf->info.si_regs.psr); | |
278 | ||
279 | for (i = UREG_G1; i <= UREG_I7; i++) | |
280 | err |= __get_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]); | |
281 | if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) { | |
282 | err |= __get_user(i, &sf->v8plus.g_upper[0]); | |
283 | if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) { | |
284 | unsigned long asi; | |
285 | ||
286 | for (i = UREG_G1; i <= UREG_I7; i++) | |
287 | err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]); | |
288 | err |= __get_user(asi, &sf->v8plus.asi); | |
289 | regs->tstate &= ~TSTATE_ASI; | |
290 | regs->tstate |= ((asi & 0xffUL) << 24UL); | |
291 | } | |
292 | } | |
293 | ||
294 | /* User can only change condition codes in %tstate. */ | |
295 | regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); | |
296 | regs->tstate |= psr_to_tstate_icc(psr); | |
297 | ||
298 | err |= __get_user(fpu_save, &sf->fpu_save); | |
299 | if (fpu_save) | |
300 | err |= restore_fpu_state32(regs, &sf->fpu_state); | |
301 | err |= __get_user(seta[0], &sf->info.si_mask); | |
302 | err |= copy_from_user(seta+1, &sf->extramask, | |
303 | (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); | |
304 | if (err) | |
305 | goto segv; | |
306 | switch (_NSIG_WORDS) { | |
307 | case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32); | |
308 | case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32); | |
309 | case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32); | |
310 | case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32); | |
311 | } | |
312 | sigdelsetmask(&set, ~_BLOCKABLE); | |
313 | spin_lock_irq(¤t->sighand->siglock); | |
314 | current->blocked = set; | |
315 | recalc_sigpending(); | |
316 | spin_unlock_irq(¤t->sighand->siglock); | |
317 | return; | |
318 | ||
319 | segv: | |
320 | force_sig(SIGSEGV, current); | |
321 | } | |
322 | ||
323 | asmlinkage void do_sigreturn32(struct pt_regs *regs) | |
324 | { | |
325 | struct sigcontext32 __user *scptr; | |
326 | unsigned int pc, npc, psr; | |
327 | sigset_t set; | |
328 | unsigned int seta[_COMPAT_NSIG_WORDS]; | |
329 | int err; | |
330 | ||
331 | /* Always make any pending restarted system calls return -EINTR */ | |
332 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
333 | ||
334 | synchronize_user_stack(); | |
335 | if (test_thread_flag(TIF_NEWSIGNALS)) { | |
336 | do_new_sigreturn32(regs); | |
337 | return; | |
338 | } | |
339 | ||
340 | scptr = (struct sigcontext32 __user *) | |
341 | (regs->u_regs[UREG_I0] & 0x00000000ffffffffUL); | |
342 | /* Check sanity of the user arg. */ | |
343 | if (!access_ok(VERIFY_READ, scptr, sizeof(struct sigcontext32)) || | |
344 | (((unsigned long) scptr) & 3)) | |
345 | goto segv; | |
346 | ||
347 | err = __get_user(pc, &scptr->sigc_pc); | |
348 | err |= __get_user(npc, &scptr->sigc_npc); | |
349 | ||
350 | if ((pc | npc) & 3) | |
351 | goto segv; /* Nice try. */ | |
352 | ||
353 | err |= __get_user(seta[0], &scptr->sigc_mask); | |
354 | /* Note that scptr + 1 points to extramask */ | |
355 | err |= copy_from_user(seta+1, scptr + 1, | |
356 | (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); | |
357 | if (err) | |
358 | goto segv; | |
359 | switch (_NSIG_WORDS) { | |
360 | case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32); | |
361 | case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32); | |
362 | case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32); | |
363 | case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32); | |
364 | } | |
365 | sigdelsetmask(&set, ~_BLOCKABLE); | |
366 | spin_lock_irq(¤t->sighand->siglock); | |
367 | current->blocked = set; | |
368 | recalc_sigpending(); | |
369 | spin_unlock_irq(¤t->sighand->siglock); | |
370 | ||
371 | if (test_thread_flag(TIF_32BIT)) { | |
372 | pc &= 0xffffffff; | |
373 | npc &= 0xffffffff; | |
374 | } | |
375 | regs->tpc = pc; | |
376 | regs->tnpc = npc; | |
377 | err = __get_user(regs->u_regs[UREG_FP], &scptr->sigc_sp); | |
378 | err |= __get_user(regs->u_regs[UREG_I0], &scptr->sigc_o0); | |
379 | err |= __get_user(regs->u_regs[UREG_G1], &scptr->sigc_g1); | |
380 | ||
381 | /* User can only change condition codes in %tstate. */ | |
382 | err |= __get_user(psr, &scptr->sigc_psr); | |
383 | if (err) | |
384 | goto segv; | |
385 | regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); | |
386 | regs->tstate |= psr_to_tstate_icc(psr); | |
387 | return; | |
388 | ||
389 | segv: | |
390 | force_sig(SIGSEGV, current); | |
391 | } | |
392 | ||
393 | asmlinkage void do_rt_sigreturn32(struct pt_regs *regs) | |
394 | { | |
395 | struct rt_signal_frame32 __user *sf; | |
396 | unsigned int psr, pc, npc, fpu_save, u_ss_sp; | |
397 | mm_segment_t old_fs; | |
398 | sigset_t set; | |
399 | compat_sigset_t seta; | |
400 | stack_t st; | |
401 | int err, i; | |
402 | ||
403 | /* Always make any pending restarted system calls return -EINTR */ | |
404 | current_thread_info()->restart_block.fn = do_no_restart_syscall; | |
405 | ||
406 | synchronize_user_stack(); | |
407 | regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; | |
408 | sf = (struct rt_signal_frame32 __user *) regs->u_regs[UREG_FP]; | |
409 | ||
410 | /* 1. Make sure we are not getting garbage from the user */ | |
411 | if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) || | |
412 | (((unsigned long) sf) & 3)) | |
413 | goto segv; | |
414 | ||
415 | get_user(pc, &sf->regs.pc); | |
416 | __get_user(npc, &sf->regs.npc); | |
417 | ||
418 | if ((pc | npc) & 3) | |
419 | goto segv; | |
420 | ||
421 | if (test_thread_flag(TIF_32BIT)) { | |
422 | pc &= 0xffffffff; | |
423 | npc &= 0xffffffff; | |
424 | } | |
425 | regs->tpc = pc; | |
426 | regs->tnpc = npc; | |
427 | ||
428 | /* 2. Restore the state */ | |
429 | err = __get_user(regs->y, &sf->regs.y); | |
430 | err |= __get_user(psr, &sf->regs.psr); | |
431 | ||
432 | for (i = UREG_G1; i <= UREG_I7; i++) | |
433 | err |= __get_user(regs->u_regs[i], &sf->regs.u_regs[i]); | |
434 | if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) { | |
435 | err |= __get_user(i, &sf->v8plus.g_upper[0]); | |
436 | if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) { | |
437 | unsigned long asi; | |
438 | ||
439 | for (i = UREG_G1; i <= UREG_I7; i++) | |
440 | err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]); | |
441 | err |= __get_user(asi, &sf->v8plus.asi); | |
442 | regs->tstate &= ~TSTATE_ASI; | |
443 | regs->tstate |= ((asi & 0xffUL) << 24UL); | |
444 | } | |
445 | } | |
446 | ||
447 | /* User can only change condition codes in %tstate. */ | |
448 | regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); | |
449 | regs->tstate |= psr_to_tstate_icc(psr); | |
450 | ||
451 | err |= __get_user(fpu_save, &sf->fpu_save); | |
452 | if (fpu_save) | |
453 | err |= restore_fpu_state32(regs, &sf->fpu_state); | |
454 | err |= copy_from_user(&seta, &sf->mask, sizeof(compat_sigset_t)); | |
455 | err |= __get_user(u_ss_sp, &sf->stack.ss_sp); | |
456 | st.ss_sp = compat_ptr(u_ss_sp); | |
457 | err |= __get_user(st.ss_flags, &sf->stack.ss_flags); | |
458 | err |= __get_user(st.ss_size, &sf->stack.ss_size); | |
459 | if (err) | |
460 | goto segv; | |
461 | ||
462 | /* It is more difficult to avoid calling this function than to | |
463 | call it and ignore errors. */ | |
464 | old_fs = get_fs(); | |
465 | set_fs(KERNEL_DS); | |
466 | do_sigaltstack((stack_t __user *) &st, NULL, (unsigned long)sf); | |
467 | set_fs(old_fs); | |
468 | ||
469 | switch (_NSIG_WORDS) { | |
470 | case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32); | |
471 | case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32); | |
472 | case 2: set.sig[1] = seta.sig[2] + (((long)seta.sig[3]) << 32); | |
473 | case 1: set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32); | |
474 | } | |
475 | sigdelsetmask(&set, ~_BLOCKABLE); | |
476 | spin_lock_irq(¤t->sighand->siglock); | |
477 | current->blocked = set; | |
478 | recalc_sigpending(); | |
479 | spin_unlock_irq(¤t->sighand->siglock); | |
480 | return; | |
481 | segv: | |
482 | force_sig(SIGSEGV, current); | |
483 | } | |
484 | ||
485 | /* Checks if the fp is valid */ | |
486 | static int invalid_frame_pointer(void __user *fp, int fplen) | |
487 | { | |
488 | if ((((unsigned long) fp) & 7) || ((unsigned long)fp) > 0x100000000ULL - fplen) | |
489 | return 1; | |
490 | return 0; | |
491 | } | |
492 | ||
493 | static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize) | |
494 | { | |
495 | unsigned long sp; | |
496 | ||
497 | regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; | |
498 | sp = regs->u_regs[UREG_FP]; | |
499 | ||
500 | /* This is the X/Open sanctioned signal stack switching. */ | |
501 | if (sa->sa_flags & SA_ONSTACK) { | |
502 | if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7)) | |
503 | sp = current->sas_ss_sp + current->sas_ss_size; | |
504 | } | |
505 | return (void __user *)(sp - framesize); | |
506 | } | |
507 | ||
508 | static void | |
509 | setup_frame32(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *oldset, siginfo_t *info) | |
510 | { | |
511 | struct signal_sframe32 __user *sframep; | |
512 | struct sigcontext32 __user *sc; | |
513 | unsigned int seta[_COMPAT_NSIG_WORDS]; | |
514 | int err = 0; | |
515 | void __user *sig_address; | |
516 | int sig_code; | |
517 | unsigned long pc = regs->tpc; | |
518 | unsigned long npc = regs->tnpc; | |
519 | unsigned int psr; | |
520 | ||
521 | if (test_thread_flag(TIF_32BIT)) { | |
522 | pc &= 0xffffffff; | |
523 | npc &= 0xffffffff; | |
524 | } | |
525 | ||
526 | synchronize_user_stack(); | |
527 | save_and_clear_fpu(); | |
528 | ||
529 | sframep = (struct signal_sframe32 __user *) | |
530 | get_sigframe(sa, regs, SF_ALIGNEDSZ); | |
531 | if (invalid_frame_pointer(sframep, sizeof(*sframep))){ | |
532 | /* Don't change signal code and address, so that | |
533 | * post mortem debuggers can have a look. | |
534 | */ | |
535 | do_exit(SIGILL); | |
536 | } | |
537 | ||
538 | sc = &sframep->sig_context; | |
539 | ||
540 | /* We've already made sure frame pointer isn't in kernel space... */ | |
541 | err = __put_user((sas_ss_flags(regs->u_regs[UREG_FP]) == SS_ONSTACK), | |
542 | &sc->sigc_onstack); | |
543 | ||
544 | switch (_NSIG_WORDS) { | |
545 | case 4: seta[7] = (oldset->sig[3] >> 32); | |
546 | seta[6] = oldset->sig[3]; | |
547 | case 3: seta[5] = (oldset->sig[2] >> 32); | |
548 | seta[4] = oldset->sig[2]; | |
549 | case 2: seta[3] = (oldset->sig[1] >> 32); | |
550 | seta[2] = oldset->sig[1]; | |
551 | case 1: seta[1] = (oldset->sig[0] >> 32); | |
552 | seta[0] = oldset->sig[0]; | |
553 | } | |
554 | err |= __put_user(seta[0], &sc->sigc_mask); | |
555 | err |= __copy_to_user(sframep->extramask, seta + 1, | |
556 | (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); | |
557 | err |= __put_user(regs->u_regs[UREG_FP], &sc->sigc_sp); | |
558 | err |= __put_user(pc, &sc->sigc_pc); | |
559 | err |= __put_user(npc, &sc->sigc_npc); | |
560 | psr = tstate_to_psr(regs->tstate); | |
561 | if (current_thread_info()->fpsaved[0] & FPRS_FEF) | |
562 | psr |= PSR_EF; | |
563 | err |= __put_user(psr, &sc->sigc_psr); | |
564 | err |= __put_user(regs->u_regs[UREG_G1], &sc->sigc_g1); | |
565 | err |= __put_user(regs->u_regs[UREG_I0], &sc->sigc_o0); | |
566 | err |= __put_user(get_thread_wsaved(), &sc->sigc_oswins); | |
567 | ||
568 | err |= copy_in_user((u32 __user *)sframep, | |
569 | (u32 __user *)(regs->u_regs[UREG_FP]), | |
570 | sizeof(struct reg_window32)); | |
571 | ||
572 | set_thread_wsaved(0); /* So process is allowed to execute. */ | |
573 | err |= __put_user(signr, &sframep->sig_num); | |
574 | sig_address = NULL; | |
575 | sig_code = 0; | |
576 | if (SI_FROMKERNEL (info) && (info->si_code & __SI_MASK) == __SI_FAULT) { | |
577 | sig_address = info->si_addr; | |
578 | switch (signr) { | |
579 | case SIGSEGV: | |
580 | switch (info->si_code) { | |
581 | case SEGV_MAPERR: sig_code = SUBSIG_NOMAPPING; break; | |
582 | default: sig_code = SUBSIG_PROTECTION; break; | |
583 | } | |
584 | break; | |
585 | case SIGILL: | |
586 | switch (info->si_code) { | |
587 | case ILL_ILLOPC: sig_code = SUBSIG_ILLINST; break; | |
588 | case ILL_PRVOPC: sig_code = SUBSIG_PRIVINST; break; | |
589 | case ILL_ILLTRP: sig_code = SUBSIG_BADTRAP(info->si_trapno); break; | |
590 | default: sig_code = SUBSIG_STACK; break; | |
591 | } | |
592 | break; | |
593 | case SIGFPE: | |
594 | switch (info->si_code) { | |
595 | case FPE_INTDIV: sig_code = SUBSIG_IDIVZERO; break; | |
596 | case FPE_INTOVF: sig_code = SUBSIG_FPINTOVFL; break; | |
597 | case FPE_FLTDIV: sig_code = SUBSIG_FPDIVZERO; break; | |
598 | case FPE_FLTOVF: sig_code = SUBSIG_FPOVFLOW; break; | |
599 | case FPE_FLTUND: sig_code = SUBSIG_FPUNFLOW; break; | |
600 | case FPE_FLTRES: sig_code = SUBSIG_FPINEXACT; break; | |
601 | case FPE_FLTINV: sig_code = SUBSIG_FPOPERROR; break; | |
602 | default: sig_code = SUBSIG_FPERROR; break; | |
603 | } | |
604 | break; | |
605 | case SIGBUS: | |
606 | switch (info->si_code) { | |
607 | case BUS_ADRALN: sig_code = SUBSIG_ALIGNMENT; break; | |
608 | case BUS_ADRERR: sig_code = SUBSIG_MISCERROR; break; | |
609 | default: sig_code = SUBSIG_BUSTIMEOUT; break; | |
610 | } | |
611 | break; | |
612 | case SIGEMT: | |
613 | switch (info->si_code) { | |
614 | case EMT_TAGOVF: sig_code = SUBSIG_TAG; break; | |
615 | } | |
616 | break; | |
617 | case SIGSYS: | |
618 | if (info->si_code == (__SI_FAULT|0x100)) { | |
619 | /* See sys_sunos32.c */ | |
620 | sig_code = info->si_trapno; | |
621 | break; | |
622 | } | |
623 | default: | |
624 | sig_address = NULL; | |
625 | } | |
626 | } | |
627 | err |= __put_user(ptr_to_compat(sig_address), &sframep->sig_address); | |
628 | err |= __put_user(sig_code, &sframep->sig_code); | |
629 | err |= __put_user(ptr_to_compat(sc), &sframep->sig_scptr); | |
630 | if (err) | |
631 | goto sigsegv; | |
632 | ||
633 | regs->u_regs[UREG_FP] = (unsigned long) sframep; | |
634 | regs->tpc = (unsigned long) sa->sa_handler; | |
635 | regs->tnpc = (regs->tpc + 4); | |
636 | if (test_thread_flag(TIF_32BIT)) { | |
637 | regs->tpc &= 0xffffffff; | |
638 | regs->tnpc &= 0xffffffff; | |
639 | } | |
640 | return; | |
641 | ||
642 | sigsegv: | |
643 | force_sigsegv(signr, current); | |
644 | } | |
645 | ||
646 | ||
647 | static int save_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu) | |
648 | { | |
649 | unsigned long *fpregs = current_thread_info()->fpregs; | |
650 | unsigned long fprs; | |
651 | int err = 0; | |
652 | ||
653 | fprs = current_thread_info()->fpsaved[0]; | |
654 | if (fprs & FPRS_DL) | |
655 | err |= copy_to_user(&fpu->si_float_regs[0], fpregs, | |
656 | (sizeof(unsigned int) * 32)); | |
657 | if (fprs & FPRS_DU) | |
658 | err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16, | |
659 | (sizeof(unsigned int) * 32)); | |
660 | err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr); | |
661 | err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr); | |
662 | err |= __put_user(fprs, &fpu->si_fprs); | |
663 | ||
664 | return err; | |
665 | } | |
666 | ||
667 | static void new_setup_frame32(struct k_sigaction *ka, struct pt_regs *regs, | |
668 | int signo, sigset_t *oldset) | |
669 | { | |
670 | struct new_signal_frame32 __user *sf; | |
671 | int sigframe_size; | |
672 | u32 psr; | |
673 | int i, err; | |
674 | unsigned int seta[_COMPAT_NSIG_WORDS]; | |
675 | ||
676 | /* 1. Make sure everything is clean */ | |
677 | synchronize_user_stack(); | |
678 | save_and_clear_fpu(); | |
679 | ||
680 | sigframe_size = NF_ALIGNEDSZ; | |
681 | if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) | |
682 | sigframe_size -= sizeof(__siginfo_fpu_t); | |
683 | ||
684 | sf = (struct new_signal_frame32 __user *) | |
685 | get_sigframe(&ka->sa, regs, sigframe_size); | |
686 | ||
687 | if (invalid_frame_pointer(sf, sigframe_size)) | |
688 | goto sigill; | |
689 | ||
690 | if (get_thread_wsaved() != 0) | |
691 | goto sigill; | |
692 | ||
693 | /* 2. Save the current process state */ | |
694 | if (test_thread_flag(TIF_32BIT)) { | |
695 | regs->tpc &= 0xffffffff; | |
696 | regs->tnpc &= 0xffffffff; | |
697 | } | |
698 | err = put_user(regs->tpc, &sf->info.si_regs.pc); | |
699 | err |= __put_user(regs->tnpc, &sf->info.si_regs.npc); | |
700 | err |= __put_user(regs->y, &sf->info.si_regs.y); | |
701 | psr = tstate_to_psr(regs->tstate); | |
702 | if (current_thread_info()->fpsaved[0] & FPRS_FEF) | |
703 | psr |= PSR_EF; | |
704 | err |= __put_user(psr, &sf->info.si_regs.psr); | |
705 | for (i = 0; i < 16; i++) | |
706 | err |= __put_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]); | |
707 | err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size); | |
708 | err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]); | |
709 | for (i = 1; i < 16; i++) | |
710 | err |= __put_user(((u32 *)regs->u_regs)[2*i], | |
711 | &sf->v8plus.g_upper[i]); | |
712 | err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL, | |
713 | &sf->v8plus.asi); | |
714 | ||
715 | if (psr & PSR_EF) { | |
716 | err |= save_fpu_state32(regs, &sf->fpu_state); | |
717 | err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save); | |
718 | } else { | |
719 | err |= __put_user(0, &sf->fpu_save); | |
720 | } | |
721 | ||
722 | switch (_NSIG_WORDS) { | |
723 | case 4: seta[7] = (oldset->sig[3] >> 32); | |
724 | seta[6] = oldset->sig[3]; | |
725 | case 3: seta[5] = (oldset->sig[2] >> 32); | |
726 | seta[4] = oldset->sig[2]; | |
727 | case 2: seta[3] = (oldset->sig[1] >> 32); | |
728 | seta[2] = oldset->sig[1]; | |
729 | case 1: seta[1] = (oldset->sig[0] >> 32); | |
730 | seta[0] = oldset->sig[0]; | |
731 | } | |
732 | err |= __put_user(seta[0], &sf->info.si_mask); | |
733 | err |= __copy_to_user(sf->extramask, seta + 1, | |
734 | (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); | |
735 | ||
736 | err |= copy_in_user((u32 __user *)sf, | |
737 | (u32 __user *)(regs->u_regs[UREG_FP]), | |
738 | sizeof(struct reg_window32)); | |
739 | ||
740 | if (err) | |
741 | goto sigsegv; | |
742 | ||
743 | /* 3. signal handler back-trampoline and parameters */ | |
744 | regs->u_regs[UREG_FP] = (unsigned long) sf; | |
745 | regs->u_regs[UREG_I0] = signo; | |
746 | regs->u_regs[UREG_I1] = (unsigned long) &sf->info; | |
747 | regs->u_regs[UREG_I2] = (unsigned long) &sf->info; | |
748 | ||
749 | /* 4. signal handler */ | |
750 | regs->tpc = (unsigned long) ka->sa.sa_handler; | |
751 | regs->tnpc = (regs->tpc + 4); | |
752 | if (test_thread_flag(TIF_32BIT)) { | |
753 | regs->tpc &= 0xffffffff; | |
754 | regs->tnpc &= 0xffffffff; | |
755 | } | |
756 | ||
757 | /* 5. return to kernel instructions */ | |
758 | if (ka->ka_restorer) { | |
759 | regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer; | |
760 | } else { | |
761 | /* Flush instruction space. */ | |
762 | unsigned long address = ((unsigned long)&(sf->insns[0])); | |
763 | pgd_t *pgdp = pgd_offset(current->mm, address); | |
764 | pud_t *pudp = pud_offset(pgdp, address); | |
765 | pmd_t *pmdp = pmd_offset(pudp, address); | |
766 | pte_t *ptep; | |
b8ae4865 | 767 | pte_t pte; |
1da177e4 LT |
768 | |
769 | regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2); | |
770 | ||
771 | err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/ | |
772 | err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/ | |
773 | if (err) | |
774 | goto sigsegv; | |
775 | ||
776 | preempt_disable(); | |
777 | ptep = pte_offset_map(pmdp, address); | |
b8ae4865 HD |
778 | pte = *ptep; |
779 | if (pte_present(pte)) { | |
1da177e4 | 780 | unsigned long page = (unsigned long) |
b8ae4865 | 781 | page_address(pte_page(pte)); |
1da177e4 | 782 | |
4f07118f DM |
783 | wmb(); |
784 | __asm__ __volatile__("flush %0 + %1" | |
785 | : /* no outputs */ | |
786 | : "r" (page), | |
787 | "r" (address & (PAGE_SIZE - 1)) | |
788 | : "memory"); | |
1da177e4 LT |
789 | } |
790 | pte_unmap(ptep); | |
791 | preempt_enable(); | |
792 | } | |
793 | return; | |
794 | ||
795 | sigill: | |
796 | do_exit(SIGILL); | |
797 | sigsegv: | |
798 | force_sigsegv(signo, current); | |
799 | } | |
800 | ||
801 | /* Setup a Solaris stack frame */ | |
802 | static void | |
803 | setup_svr4_frame32(struct sigaction *sa, unsigned long pc, unsigned long npc, | |
804 | struct pt_regs *regs, int signr, sigset_t *oldset) | |
805 | { | |
806 | svr4_signal_frame_t __user *sfp; | |
807 | svr4_gregset_t __user *gr; | |
808 | svr4_siginfo_t __user *si; | |
809 | svr4_mcontext_t __user *mc; | |
810 | svr4_gwindows_t __user *gw; | |
811 | svr4_ucontext_t __user *uc; | |
812 | svr4_sigset_t setv; | |
813 | unsigned int psr; | |
814 | int i, err; | |
815 | ||
816 | synchronize_user_stack(); | |
817 | save_and_clear_fpu(); | |
818 | ||
819 | regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; | |
820 | sfp = (svr4_signal_frame_t __user *) | |
821 | get_sigframe(sa, regs, | |
822 | sizeof(struct reg_window32) + SVR4_SF_ALIGNED); | |
823 | ||
824 | if (invalid_frame_pointer(sfp, sizeof(*sfp))) | |
825 | do_exit(SIGILL); | |
826 | ||
827 | /* Start with a clean frame pointer and fill it */ | |
828 | err = clear_user(sfp, sizeof(*sfp)); | |
829 | ||
830 | /* Setup convenience variables */ | |
831 | si = &sfp->si; | |
832 | uc = &sfp->uc; | |
833 | gw = &sfp->gw; | |
834 | mc = &uc->mcontext; | |
835 | gr = &mc->greg; | |
836 | ||
837 | /* FIXME: where am I supposed to put this? | |
838 | * sc->sigc_onstack = old_status; | |
839 | * anyways, it does not look like it is used for anything at all. | |
840 | */ | |
841 | setv.sigbits[0] = oldset->sig[0]; | |
842 | setv.sigbits[1] = (oldset->sig[0] >> 32); | |
843 | if (_NSIG_WORDS >= 2) { | |
844 | setv.sigbits[2] = oldset->sig[1]; | |
845 | setv.sigbits[3] = (oldset->sig[1] >> 32); | |
846 | err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t)); | |
847 | } else | |
848 | err |= __copy_to_user(&uc->sigmask, &setv, | |
849 | 2 * sizeof(unsigned int)); | |
850 | ||
851 | /* Store registers */ | |
852 | if (test_thread_flag(TIF_32BIT)) { | |
853 | regs->tpc &= 0xffffffff; | |
854 | regs->tnpc &= 0xffffffff; | |
855 | } | |
856 | err |= __put_user(regs->tpc, &((*gr)[SVR4_PC])); | |
857 | err |= __put_user(regs->tnpc, &((*gr)[SVR4_NPC])); | |
858 | psr = tstate_to_psr(regs->tstate); | |
859 | if (current_thread_info()->fpsaved[0] & FPRS_FEF) | |
860 | psr |= PSR_EF; | |
861 | err |= __put_user(psr, &((*gr)[SVR4_PSR])); | |
862 | err |= __put_user(regs->y, &((*gr)[SVR4_Y])); | |
863 | ||
864 | /* Copy g[1..7] and o[0..7] registers */ | |
865 | for (i = 0; i < 7; i++) | |
866 | err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i); | |
867 | for (i = 0; i < 8; i++) | |
868 | err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i); | |
869 | ||
870 | /* Setup sigaltstack */ | |
871 | err |= __put_user(current->sas_ss_sp, &uc->stack.sp); | |
872 | err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags); | |
873 | err |= __put_user(current->sas_ss_size, &uc->stack.size); | |
874 | ||
875 | /* Save the currently window file: */ | |
876 | ||
877 | /* 1. Link sfp->uc->gwins to our windows */ | |
878 | err |= __put_user(ptr_to_compat(gw), &mc->gwin); | |
879 | ||
880 | /* 2. Number of windows to restore at setcontext (): */ | |
881 | err |= __put_user(get_thread_wsaved(), &gw->count); | |
882 | ||
883 | /* 3. We just pay attention to the gw->count field on setcontext */ | |
884 | set_thread_wsaved(0); /* So process is allowed to execute. */ | |
885 | ||
886 | /* Setup the signal information. Solaris expects a bunch of | |
887 | * information to be passed to the signal handler, we don't provide | |
888 | * that much currently, should use siginfo. | |
889 | */ | |
890 | err |= __put_user(signr, &si->siginfo.signo); | |
891 | err |= __put_user(SVR4_SINOINFO, &si->siginfo.code); | |
892 | if (err) | |
893 | goto sigsegv; | |
894 | ||
895 | regs->u_regs[UREG_FP] = (unsigned long) sfp; | |
896 | regs->tpc = (unsigned long) sa->sa_handler; | |
897 | regs->tnpc = (regs->tpc + 4); | |
898 | if (test_thread_flag(TIF_32BIT)) { | |
899 | regs->tpc &= 0xffffffff; | |
900 | regs->tnpc &= 0xffffffff; | |
901 | } | |
902 | ||
903 | /* Arguments passed to signal handler */ | |
904 | if (regs->u_regs[14]){ | |
905 | struct reg_window32 __user *rw = (struct reg_window32 __user *) | |
906 | (regs->u_regs[14] & 0x00000000ffffffffUL); | |
907 | ||
908 | err |= __put_user(signr, &rw->ins[0]); | |
909 | err |= __put_user((u64)si, &rw->ins[1]); | |
910 | err |= __put_user((u64)uc, &rw->ins[2]); | |
911 | err |= __put_user((u64)sfp, &rw->ins[6]); /* frame pointer */ | |
912 | if (err) | |
913 | goto sigsegv; | |
914 | ||
915 | regs->u_regs[UREG_I0] = signr; | |
916 | regs->u_regs[UREG_I1] = (u32)(u64) si; | |
917 | regs->u_regs[UREG_I2] = (u32)(u64) uc; | |
918 | } | |
919 | return; | |
920 | ||
921 | sigsegv: | |
922 | force_sigsegv(signr, current); | |
923 | } | |
924 | ||
925 | asmlinkage int | |
926 | svr4_getcontext(svr4_ucontext_t __user *uc, struct pt_regs *regs) | |
927 | { | |
928 | svr4_gregset_t __user *gr; | |
929 | svr4_mcontext_t __user *mc; | |
930 | svr4_sigset_t setv; | |
931 | int i, err; | |
932 | u32 psr; | |
933 | ||
934 | synchronize_user_stack(); | |
935 | save_and_clear_fpu(); | |
936 | ||
937 | if (get_thread_wsaved()) | |
938 | do_exit(SIGSEGV); | |
939 | ||
940 | err = clear_user(uc, sizeof(*uc)); | |
941 | ||
942 | /* Setup convenience variables */ | |
943 | mc = &uc->mcontext; | |
944 | gr = &mc->greg; | |
945 | ||
946 | setv.sigbits[0] = current->blocked.sig[0]; | |
947 | setv.sigbits[1] = (current->blocked.sig[0] >> 32); | |
948 | if (_NSIG_WORDS >= 2) { | |
949 | setv.sigbits[2] = current->blocked.sig[1]; | |
950 | setv.sigbits[3] = (current->blocked.sig[1] >> 32); | |
951 | err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t)); | |
952 | } else | |
953 | err |= __copy_to_user(&uc->sigmask, &setv, 2 * sizeof(unsigned)); | |
954 | ||
955 | /* Store registers */ | |
956 | if (test_thread_flag(TIF_32BIT)) { | |
957 | regs->tpc &= 0xffffffff; | |
958 | regs->tnpc &= 0xffffffff; | |
959 | } | |
960 | err |= __put_user(regs->tpc, &uc->mcontext.greg[SVR4_PC]); | |
961 | err |= __put_user(regs->tnpc, &uc->mcontext.greg[SVR4_NPC]); | |
962 | ||
963 | psr = tstate_to_psr(regs->tstate) & ~PSR_EF; | |
964 | if (current_thread_info()->fpsaved[0] & FPRS_FEF) | |
965 | psr |= PSR_EF; | |
966 | err |= __put_user(psr, &uc->mcontext.greg[SVR4_PSR]); | |
967 | ||
968 | err |= __put_user(regs->y, &uc->mcontext.greg[SVR4_Y]); | |
969 | ||
970 | /* Copy g[1..7] and o[0..7] registers */ | |
971 | for (i = 0; i < 7; i++) | |
972 | err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i); | |
973 | for (i = 0; i < 8; i++) | |
974 | err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i); | |
975 | ||
976 | /* Setup sigaltstack */ | |
977 | err |= __put_user(current->sas_ss_sp, &uc->stack.sp); | |
978 | err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags); | |
979 | err |= __put_user(current->sas_ss_size, &uc->stack.size); | |
980 | ||
981 | /* The register file is not saved | |
982 | * we have already stuffed all of it with sync_user_stack | |
983 | */ | |
984 | return (err ? -EFAULT : 0); | |
985 | } | |
986 | ||
987 | ||
988 | /* Set the context for a svr4 application, this is Solaris way to sigreturn */ | |
989 | asmlinkage int svr4_setcontext(svr4_ucontext_t __user *c, struct pt_regs *regs) | |
990 | { | |
991 | svr4_gregset_t __user *gr; | |
992 | mm_segment_t old_fs; | |
993 | u32 pc, npc, psr, u_ss_sp; | |
994 | sigset_t set; | |
995 | svr4_sigset_t setv; | |
996 | int i, err; | |
997 | stack_t st; | |
998 | ||
999 | /* Fixme: restore windows, or is this already taken care of in | |
1000 | * svr4_setup_frame when sync_user_windows is done? | |
1001 | */ | |
1002 | flush_user_windows(); | |
1003 | ||
1004 | if (get_thread_wsaved()) | |
1005 | goto sigsegv; | |
1006 | ||
1007 | if (((unsigned long) c) & 3){ | |
1008 | printk("Unaligned structure passed\n"); | |
1009 | goto sigsegv; | |
1010 | } | |
1011 | ||
1012 | if (!__access_ok(c, sizeof(*c))) { | |
1013 | /* Miguel, add nice debugging msg _here_. ;-) */ | |
1014 | goto sigsegv; | |
1015 | } | |
1016 | ||
1017 | /* Check for valid PC and nPC */ | |
1018 | gr = &c->mcontext.greg; | |
1019 | err = __get_user(pc, &((*gr)[SVR4_PC])); | |
1020 | err |= __get_user(npc, &((*gr)[SVR4_NPC])); | |
1021 | if ((pc | npc) & 3) | |
1022 | goto sigsegv; | |
1023 | ||
1024 | /* Retrieve information from passed ucontext */ | |
1025 | /* note that nPC is ored a 1, this is used to inform entry.S */ | |
1026 | /* that we don't want it to mess with our PC and nPC */ | |
1027 | ||
1028 | err |= copy_from_user(&setv, &c->sigmask, sizeof(svr4_sigset_t)); | |
1029 | set.sig[0] = setv.sigbits[0] | (((long)setv.sigbits[1]) << 32); | |
1030 | if (_NSIG_WORDS >= 2) | |
1031 | set.sig[1] = setv.sigbits[2] | (((long)setv.sigbits[3]) << 32); | |
1032 | ||
1033 | err |= __get_user(u_ss_sp, &c->stack.sp); | |
1034 | st.ss_sp = compat_ptr(u_ss_sp); | |
1035 | err |= __get_user(st.ss_flags, &c->stack.flags); | |
1036 | err |= __get_user(st.ss_size, &c->stack.size); | |
1037 | if (err) | |
1038 | goto sigsegv; | |
1039 | ||
1040 | /* It is more difficult to avoid calling this function than to | |
1041 | call it and ignore errors. */ | |
1042 | old_fs = get_fs(); | |
1043 | set_fs(KERNEL_DS); | |
1044 | do_sigaltstack((stack_t __user *) &st, NULL, regs->u_regs[UREG_I6]); | |
1045 | set_fs(old_fs); | |
1046 | ||
1047 | sigdelsetmask(&set, ~_BLOCKABLE); | |
1048 | spin_lock_irq(¤t->sighand->siglock); | |
1049 | current->blocked = set; | |
1050 | recalc_sigpending(); | |
1051 | spin_unlock_irq(¤t->sighand->siglock); | |
1052 | regs->tpc = pc; | |
1053 | regs->tnpc = npc | 1; | |
1054 | if (test_thread_flag(TIF_32BIT)) { | |
1055 | regs->tpc &= 0xffffffff; | |
1056 | regs->tnpc &= 0xffffffff; | |
1057 | } | |
1058 | err |= __get_user(regs->y, &((*gr)[SVR4_Y])); | |
1059 | err |= __get_user(psr, &((*gr)[SVR4_PSR])); | |
1060 | regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); | |
1061 | regs->tstate |= psr_to_tstate_icc(psr); | |
1062 | ||
1063 | /* Restore g[1..7] and o[0..7] registers */ | |
1064 | for (i = 0; i < 7; i++) | |
1065 | err |= __get_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i); | |
1066 | for (i = 0; i < 8; i++) | |
1067 | err |= __get_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i); | |
1068 | if (err) | |
1069 | goto sigsegv; | |
1070 | ||
1071 | return -EINTR; | |
1072 | sigsegv: | |
1073 | return -EFAULT; | |
1074 | } | |
1075 | ||
1076 | static void setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs, | |
1077 | unsigned long signr, sigset_t *oldset, | |
1078 | siginfo_t *info) | |
1079 | { | |
1080 | struct rt_signal_frame32 __user *sf; | |
1081 | int sigframe_size; | |
1082 | u32 psr; | |
1083 | int i, err; | |
1084 | compat_sigset_t seta; | |
1085 | ||
1086 | /* 1. Make sure everything is clean */ | |
1087 | synchronize_user_stack(); | |
1088 | save_and_clear_fpu(); | |
1089 | ||
1090 | sigframe_size = RT_ALIGNEDSZ; | |
1091 | if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) | |
1092 | sigframe_size -= sizeof(__siginfo_fpu_t); | |
1093 | ||
1094 | sf = (struct rt_signal_frame32 __user *) | |
1095 | get_sigframe(&ka->sa, regs, sigframe_size); | |
1096 | ||
1097 | if (invalid_frame_pointer(sf, sigframe_size)) | |
1098 | goto sigill; | |
1099 | ||
1100 | if (get_thread_wsaved() != 0) | |
1101 | goto sigill; | |
1102 | ||
1103 | /* 2. Save the current process state */ | |
1104 | if (test_thread_flag(TIF_32BIT)) { | |
1105 | regs->tpc &= 0xffffffff; | |
1106 | regs->tnpc &= 0xffffffff; | |
1107 | } | |
1108 | err = put_user(regs->tpc, &sf->regs.pc); | |
1109 | err |= __put_user(regs->tnpc, &sf->regs.npc); | |
1110 | err |= __put_user(regs->y, &sf->regs.y); | |
1111 | psr = tstate_to_psr(regs->tstate); | |
1112 | if (current_thread_info()->fpsaved[0] & FPRS_FEF) | |
1113 | psr |= PSR_EF; | |
1114 | err |= __put_user(psr, &sf->regs.psr); | |
1115 | for (i = 0; i < 16; i++) | |
1116 | err |= __put_user(regs->u_regs[i], &sf->regs.u_regs[i]); | |
1117 | err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size); | |
1118 | err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]); | |
1119 | for (i = 1; i < 16; i++) | |
1120 | err |= __put_user(((u32 *)regs->u_regs)[2*i], | |
1121 | &sf->v8plus.g_upper[i]); | |
1122 | err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL, | |
1123 | &sf->v8plus.asi); | |
1124 | ||
1125 | if (psr & PSR_EF) { | |
1126 | err |= save_fpu_state32(regs, &sf->fpu_state); | |
1127 | err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save); | |
1128 | } else { | |
1129 | err |= __put_user(0, &sf->fpu_save); | |
1130 | } | |
1131 | ||
1132 | /* Update the siginfo structure. */ | |
1133 | err |= copy_siginfo_to_user32(&sf->info, info); | |
1134 | ||
1135 | /* Setup sigaltstack */ | |
1136 | err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp); | |
1137 | err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags); | |
1138 | err |= __put_user(current->sas_ss_size, &sf->stack.ss_size); | |
1139 | ||
1140 | switch (_NSIG_WORDS) { | |
1141 | case 4: seta.sig[7] = (oldset->sig[3] >> 32); | |
1142 | seta.sig[6] = oldset->sig[3]; | |
1143 | case 3: seta.sig[5] = (oldset->sig[2] >> 32); | |
1144 | seta.sig[4] = oldset->sig[2]; | |
1145 | case 2: seta.sig[3] = (oldset->sig[1] >> 32); | |
1146 | seta.sig[2] = oldset->sig[1]; | |
1147 | case 1: seta.sig[1] = (oldset->sig[0] >> 32); | |
1148 | seta.sig[0] = oldset->sig[0]; | |
1149 | } | |
1150 | err |= __copy_to_user(&sf->mask, &seta, sizeof(compat_sigset_t)); | |
1151 | ||
1152 | err |= copy_in_user((u32 __user *)sf, | |
1153 | (u32 __user *)(regs->u_regs[UREG_FP]), | |
1154 | sizeof(struct reg_window32)); | |
1155 | if (err) | |
1156 | goto sigsegv; | |
1157 | ||
1158 | /* 3. signal handler back-trampoline and parameters */ | |
1159 | regs->u_regs[UREG_FP] = (unsigned long) sf; | |
1160 | regs->u_regs[UREG_I0] = signr; | |
1161 | regs->u_regs[UREG_I1] = (unsigned long) &sf->info; | |
1162 | regs->u_regs[UREG_I2] = (unsigned long) &sf->regs; | |
1163 | ||
1164 | /* 4. signal handler */ | |
1165 | regs->tpc = (unsigned long) ka->sa.sa_handler; | |
1166 | regs->tnpc = (regs->tpc + 4); | |
1167 | if (test_thread_flag(TIF_32BIT)) { | |
1168 | regs->tpc &= 0xffffffff; | |
1169 | regs->tnpc &= 0xffffffff; | |
1170 | } | |
1171 | ||
1172 | /* 5. return to kernel instructions */ | |
1173 | if (ka->ka_restorer) | |
1174 | regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer; | |
1175 | else { | |
1176 | /* Flush instruction space. */ | |
1177 | unsigned long address = ((unsigned long)&(sf->insns[0])); | |
1178 | pgd_t *pgdp = pgd_offset(current->mm, address); | |
1179 | pud_t *pudp = pud_offset(pgdp, address); | |
1180 | pmd_t *pmdp = pmd_offset(pudp, address); | |
1181 | pte_t *ptep; | |
1182 | ||
1183 | regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2); | |
1184 | ||
1185 | /* mov __NR_rt_sigreturn, %g1 */ | |
1186 | err |= __put_user(0x82102065, &sf->insns[0]); | |
1187 | ||
1188 | /* t 0x10 */ | |
1189 | err |= __put_user(0x91d02010, &sf->insns[1]); | |
1190 | if (err) | |
1191 | goto sigsegv; | |
1192 | ||
1193 | preempt_disable(); | |
1194 | ptep = pte_offset_map(pmdp, address); | |
1195 | if (pte_present(*ptep)) { | |
1196 | unsigned long page = (unsigned long) | |
1197 | page_address(pte_page(*ptep)); | |
1198 | ||
4f07118f DM |
1199 | wmb(); |
1200 | __asm__ __volatile__("flush %0 + %1" | |
1201 | : /* no outputs */ | |
1202 | : "r" (page), | |
1203 | "r" (address & (PAGE_SIZE - 1)) | |
1204 | : "memory"); | |
1da177e4 LT |
1205 | } |
1206 | pte_unmap(ptep); | |
1207 | preempt_enable(); | |
1208 | } | |
1209 | return; | |
1210 | ||
1211 | sigill: | |
1212 | do_exit(SIGILL); | |
1213 | sigsegv: | |
1214 | force_sigsegv(signr, current); | |
1215 | } | |
1216 | ||
1217 | static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka, | |
1218 | siginfo_t *info, | |
1219 | sigset_t *oldset, struct pt_regs *regs, | |
1220 | int svr4_signal) | |
1221 | { | |
1222 | if (svr4_signal) | |
1223 | setup_svr4_frame32(&ka->sa, regs->tpc, regs->tnpc, | |
1224 | regs, signr, oldset); | |
1225 | else { | |
1226 | if (ka->sa.sa_flags & SA_SIGINFO) | |
1227 | setup_rt_frame32(ka, regs, signr, oldset, info); | |
1228 | else if (test_thread_flag(TIF_NEWSIGNALS)) | |
1229 | new_setup_frame32(ka, regs, signr, oldset); | |
1230 | else | |
1231 | setup_frame32(&ka->sa, regs, signr, oldset, info); | |
1232 | } | |
69be8f18 SR |
1233 | spin_lock_irq(¤t->sighand->siglock); |
1234 | sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); | |
1235 | if (!(ka->sa.sa_flags & SA_NOMASK)) | |
1da177e4 | 1236 | sigaddset(¤t->blocked,signr); |
69be8f18 SR |
1237 | recalc_sigpending(); |
1238 | spin_unlock_irq(¤t->sighand->siglock); | |
1da177e4 LT |
1239 | } |
1240 | ||
1241 | static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs, | |
1242 | struct sigaction *sa) | |
1243 | { | |
1244 | switch (regs->u_regs[UREG_I0]) { | |
1245 | case ERESTART_RESTARTBLOCK: | |
1246 | case ERESTARTNOHAND: | |
1247 | no_system_call_restart: | |
1248 | regs->u_regs[UREG_I0] = EINTR; | |
1249 | regs->tstate |= TSTATE_ICARRY; | |
1250 | break; | |
1251 | case ERESTARTSYS: | |
1252 | if (!(sa->sa_flags & SA_RESTART)) | |
1253 | goto no_system_call_restart; | |
1254 | /* fallthrough */ | |
1255 | case ERESTARTNOINTR: | |
1256 | regs->u_regs[UREG_I0] = orig_i0; | |
1257 | regs->tpc -= 4; | |
1258 | regs->tnpc -= 4; | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | /* Note that 'init' is a special process: it doesn't get signals it doesn't | |
1263 | * want to handle. Thus you cannot kill init even with a SIGKILL even by | |
1264 | * mistake. | |
1265 | */ | |
2d7d5f05 DM |
1266 | void do_signal32(sigset_t *oldset, struct pt_regs * regs, |
1267 | unsigned long orig_i0, int restart_syscall) | |
1da177e4 LT |
1268 | { |
1269 | siginfo_t info; | |
1270 | struct signal_deliver_cookie cookie; | |
1271 | struct k_sigaction ka; | |
1272 | int signr; | |
1273 | int svr4_signal = current->personality == PER_SVR4; | |
1274 | ||
1275 | cookie.restart_syscall = restart_syscall; | |
1276 | cookie.orig_i0 = orig_i0; | |
1277 | ||
1278 | signr = get_signal_to_deliver(&info, &ka, regs, &cookie); | |
1279 | if (signr > 0) { | |
1280 | if (cookie.restart_syscall) | |
1281 | syscall_restart32(orig_i0, regs, &ka.sa); | |
1282 | handle_signal32(signr, &ka, &info, oldset, | |
1283 | regs, svr4_signal); | |
2d7d5f05 DM |
1284 | |
1285 | /* a signal was successfully delivered; the saved | |
1286 | * sigmask will have been stored in the signal frame, | |
1287 | * and will be restored by sigreturn, so we can simply | |
1288 | * clear the TIF_RESTORE_SIGMASK flag. | |
1289 | */ | |
1290 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) | |
1291 | clear_thread_flag(TIF_RESTORE_SIGMASK); | |
1292 | return; | |
1da177e4 LT |
1293 | } |
1294 | if (cookie.restart_syscall && | |
1295 | (regs->u_regs[UREG_I0] == ERESTARTNOHAND || | |
1296 | regs->u_regs[UREG_I0] == ERESTARTSYS || | |
1297 | regs->u_regs[UREG_I0] == ERESTARTNOINTR)) { | |
1298 | /* replay the system call when we are done */ | |
1299 | regs->u_regs[UREG_I0] = cookie.orig_i0; | |
1300 | regs->tpc -= 4; | |
1301 | regs->tnpc -= 4; | |
1302 | } | |
1303 | if (cookie.restart_syscall && | |
1304 | regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) { | |
1305 | regs->u_regs[UREG_G1] = __NR_restart_syscall; | |
1306 | regs->tpc -= 4; | |
1307 | regs->tnpc -= 4; | |
1308 | } | |
2d7d5f05 DM |
1309 | |
1310 | /* if there's no signal to deliver, we just put the saved sigmask | |
1311 | * back | |
1312 | */ | |
1313 | if (test_thread_flag(TIF_RESTORE_SIGMASK)) { | |
1314 | clear_thread_flag(TIF_RESTORE_SIGMASK); | |
1315 | sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); | |
1316 | } | |
1da177e4 LT |
1317 | } |
1318 | ||
1319 | struct sigstack32 { | |
1320 | u32 the_stack; | |
1321 | int cur_status; | |
1322 | }; | |
1323 | ||
1324 | asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp) | |
1325 | { | |
1326 | struct sigstack32 __user *ssptr = | |
1327 | (struct sigstack32 __user *)((unsigned long)(u_ssptr)); | |
1328 | struct sigstack32 __user *ossptr = | |
1329 | (struct sigstack32 __user *)((unsigned long)(u_ossptr)); | |
1330 | int ret = -EFAULT; | |
1331 | ||
1332 | /* First see if old state is wanted. */ | |
1333 | if (ossptr) { | |
1334 | if (put_user(current->sas_ss_sp + current->sas_ss_size, | |
1335 | &ossptr->the_stack) || | |
1336 | __put_user(on_sig_stack(sp), &ossptr->cur_status)) | |
1337 | goto out; | |
1338 | } | |
1339 | ||
1340 | /* Now see if we want to update the new state. */ | |
1341 | if (ssptr) { | |
1342 | u32 ss_sp; | |
1343 | ||
1344 | if (get_user(ss_sp, &ssptr->the_stack)) | |
1345 | goto out; | |
1346 | ||
1347 | /* If the current stack was set with sigaltstack, don't | |
1348 | * swap stacks while we are on it. | |
1349 | */ | |
1350 | ret = -EPERM; | |
1351 | if (current->sas_ss_sp && on_sig_stack(sp)) | |
1352 | goto out; | |
1353 | ||
1354 | /* Since we don't know the extent of the stack, and we don't | |
1355 | * track onstack-ness, but rather calculate it, we must | |
1356 | * presume a size. Ho hum this interface is lossy. | |
1357 | */ | |
1358 | current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; | |
1359 | current->sas_ss_size = SIGSTKSZ; | |
1360 | } | |
1361 | ||
1362 | ret = 0; | |
1363 | out: | |
1364 | return ret; | |
1365 | } | |
1366 | ||
1367 | asmlinkage long do_sys32_sigaltstack(u32 ussa, u32 uossa, unsigned long sp) | |
1368 | { | |
1369 | stack_t uss, uoss; | |
1370 | u32 u_ss_sp = 0; | |
1371 | int ret; | |
1372 | mm_segment_t old_fs; | |
1373 | stack_t32 __user *uss32 = compat_ptr(ussa); | |
1374 | stack_t32 __user *uoss32 = compat_ptr(uossa); | |
1375 | ||
1376 | if (ussa && (get_user(u_ss_sp, &uss32->ss_sp) || | |
1377 | __get_user(uss.ss_flags, &uss32->ss_flags) || | |
1378 | __get_user(uss.ss_size, &uss32->ss_size))) | |
1379 | return -EFAULT; | |
1380 | uss.ss_sp = compat_ptr(u_ss_sp); | |
1381 | old_fs = get_fs(); | |
1382 | set_fs(KERNEL_DS); | |
1383 | ret = do_sigaltstack(ussa ? (stack_t __user *) &uss : NULL, | |
1384 | uossa ? (stack_t __user *) &uoss : NULL, sp); | |
1385 | set_fs(old_fs); | |
1386 | if (!ret && uossa && (put_user(ptr_to_compat(uoss.ss_sp), &uoss32->ss_sp) || | |
1387 | __put_user(uoss.ss_flags, &uoss32->ss_flags) || | |
1388 | __put_user(uoss.ss_size, &uoss32->ss_size))) | |
1389 | return -EFAULT; | |
1390 | return ret; | |
1391 | } |