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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc64/kernel/signal32.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/sparc64/kernel/signal32.c')
-rw-r--r--arch/sparc64/kernel/signal32.c1469
1 files changed, 1469 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/signal32.c b/arch/sparc64/kernel/signal32.c
new file mode 100644
index 000000000000..859255cf6762
--- /dev/null
+++ b/arch/sparc64/kernel/signal32.c
@@ -0,0 +1,1469 @@
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
35int 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 */
52struct 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
66typedef 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 */
77struct 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
89typedef 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 {
105 timer_t _tid; /* timer id */
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
141struct 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
160int 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:
195 case __SI_POLL >> 16:
196 err |= __put_user(from->si_trapno, &to->si_trapno);
197 err |= __put_user((unsigned long)from->si_addr, &to->si_addr);
198 break;
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 */
213int 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
226/*
227 * atomically swap in the new signal mask, and wait for a signal.
228 * This is really tricky on the Sparc, watch out...
229 */
230asmlinkage void _sigpause32_common(compat_old_sigset_t set, struct pt_regs *regs)
231{
232 sigset_t saveset;
233
234 set &= _BLOCKABLE;
235 spin_lock_irq(&current->sighand->siglock);
236 saveset = current->blocked;
237 siginitset(&current->blocked, set);
238 recalc_sigpending();
239 spin_unlock_irq(&current->sighand->siglock);
240
241 regs->tpc = regs->tnpc;
242 regs->tnpc += 4;
243 if (test_thread_flag(TIF_32BIT)) {
244 regs->tpc &= 0xffffffff;
245 regs->tnpc &= 0xffffffff;
246 }
247
248 /* Condition codes and return value where set here for sigpause,
249 * and so got used by setup_frame, which again causes sigreturn()
250 * to return -EINTR.
251 */
252 while (1) {
253 current->state = TASK_INTERRUPTIBLE;
254 schedule();
255 /*
256 * Return -EINTR and set condition code here,
257 * so the interrupted system call actually returns
258 * these.
259 */
260 regs->tstate |= TSTATE_ICARRY;
261 regs->u_regs[UREG_I0] = EINTR;
262 if (do_signal32(&saveset, regs, 0, 0))
263 return;
264 }
265}
266
267asmlinkage void do_rt_sigsuspend32(u32 uset, size_t sigsetsize, struct pt_regs *regs)
268{
269 sigset_t oldset, set;
270 compat_sigset_t set32;
271
272 /* XXX: Don't preclude handling different sized sigset_t's. */
273 if (((compat_size_t)sigsetsize) != sizeof(sigset_t)) {
274 regs->tstate |= TSTATE_ICARRY;
275 regs->u_regs[UREG_I0] = EINVAL;
276 return;
277 }
278 if (copy_from_user(&set32, compat_ptr(uset), sizeof(set32))) {
279 regs->tstate |= TSTATE_ICARRY;
280 regs->u_regs[UREG_I0] = EFAULT;
281 return;
282 }
283 switch (_NSIG_WORDS) {
284 case 4: set.sig[3] = set32.sig[6] + (((long)set32.sig[7]) << 32);
285 case 3: set.sig[2] = set32.sig[4] + (((long)set32.sig[5]) << 32);
286 case 2: set.sig[1] = set32.sig[2] + (((long)set32.sig[3]) << 32);
287 case 1: set.sig[0] = set32.sig[0] + (((long)set32.sig[1]) << 32);
288 }
289 sigdelsetmask(&set, ~_BLOCKABLE);
290 spin_lock_irq(&current->sighand->siglock);
291 oldset = current->blocked;
292 current->blocked = set;
293 recalc_sigpending();
294 spin_unlock_irq(&current->sighand->siglock);
295
296 regs->tpc = regs->tnpc;
297 regs->tnpc += 4;
298 if (test_thread_flag(TIF_32BIT)) {
299 regs->tpc &= 0xffffffff;
300 regs->tnpc &= 0xffffffff;
301 }
302
303 /* Condition codes and return value where set here for sigpause,
304 * and so got used by setup_frame, which again causes sigreturn()
305 * to return -EINTR.
306 */
307 while (1) {
308 current->state = TASK_INTERRUPTIBLE;
309 schedule();
310 /*
311 * Return -EINTR and set condition code here,
312 * so the interrupted system call actually returns
313 * these.
314 */
315 regs->tstate |= TSTATE_ICARRY;
316 regs->u_regs[UREG_I0] = EINTR;
317 if (do_signal32(&oldset, regs, 0, 0))
318 return;
319 }
320}
321
322static int restore_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
323{
324 unsigned long *fpregs = current_thread_info()->fpregs;
325 unsigned long fprs;
326 int err;
327
328 err = __get_user(fprs, &fpu->si_fprs);
329 fprs_write(0);
330 regs->tstate &= ~TSTATE_PEF;
331 if (fprs & FPRS_DL)
332 err |= copy_from_user(fpregs, &fpu->si_float_regs[0], (sizeof(unsigned int) * 32));
333 if (fprs & FPRS_DU)
334 err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32], (sizeof(unsigned int) * 32));
335 err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
336 err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr);
337 current_thread_info()->fpsaved[0] |= fprs;
338 return err;
339}
340
341void do_new_sigreturn32(struct pt_regs *regs)
342{
343 struct new_signal_frame32 __user *sf;
344 unsigned int psr;
345 unsigned pc, npc, fpu_save;
346 sigset_t set;
347 unsigned seta[_COMPAT_NSIG_WORDS];
348 int err, i;
349
350 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
351 sf = (struct new_signal_frame32 __user *) regs->u_regs[UREG_FP];
352
353 /* 1. Make sure we are not getting garbage from the user */
354 if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
355 (((unsigned long) sf) & 3))
356 goto segv;
357
358 get_user(pc, &sf->info.si_regs.pc);
359 __get_user(npc, &sf->info.si_regs.npc);
360
361 if ((pc | npc) & 3)
362 goto segv;
363
364 if (test_thread_flag(TIF_32BIT)) {
365 pc &= 0xffffffff;
366 npc &= 0xffffffff;
367 }
368 regs->tpc = pc;
369 regs->tnpc = npc;
370
371 /* 2. Restore the state */
372 err = __get_user(regs->y, &sf->info.si_regs.y);
373 err |= __get_user(psr, &sf->info.si_regs.psr);
374
375 for (i = UREG_G1; i <= UREG_I7; i++)
376 err |= __get_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
377 if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
378 err |= __get_user(i, &sf->v8plus.g_upper[0]);
379 if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
380 unsigned long asi;
381
382 for (i = UREG_G1; i <= UREG_I7; i++)
383 err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
384 err |= __get_user(asi, &sf->v8plus.asi);
385 regs->tstate &= ~TSTATE_ASI;
386 regs->tstate |= ((asi & 0xffUL) << 24UL);
387 }
388 }
389
390 /* User can only change condition codes in %tstate. */
391 regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
392 regs->tstate |= psr_to_tstate_icc(psr);
393
394 err |= __get_user(fpu_save, &sf->fpu_save);
395 if (fpu_save)
396 err |= restore_fpu_state32(regs, &sf->fpu_state);
397 err |= __get_user(seta[0], &sf->info.si_mask);
398 err |= copy_from_user(seta+1, &sf->extramask,
399 (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
400 if (err)
401 goto segv;
402 switch (_NSIG_WORDS) {
403 case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
404 case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
405 case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
406 case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
407 }
408 sigdelsetmask(&set, ~_BLOCKABLE);
409 spin_lock_irq(&current->sighand->siglock);
410 current->blocked = set;
411 recalc_sigpending();
412 spin_unlock_irq(&current->sighand->siglock);
413 return;
414
415segv:
416 force_sig(SIGSEGV, current);
417}
418
419asmlinkage void do_sigreturn32(struct pt_regs *regs)
420{
421 struct sigcontext32 __user *scptr;
422 unsigned int pc, npc, psr;
423 sigset_t set;
424 unsigned int seta[_COMPAT_NSIG_WORDS];
425 int err;
426
427 /* Always make any pending restarted system calls return -EINTR */
428 current_thread_info()->restart_block.fn = do_no_restart_syscall;
429
430 synchronize_user_stack();
431 if (test_thread_flag(TIF_NEWSIGNALS)) {
432 do_new_sigreturn32(regs);
433 return;
434 }
435
436 scptr = (struct sigcontext32 __user *)
437 (regs->u_regs[UREG_I0] & 0x00000000ffffffffUL);
438 /* Check sanity of the user arg. */
439 if (!access_ok(VERIFY_READ, scptr, sizeof(struct sigcontext32)) ||
440 (((unsigned long) scptr) & 3))
441 goto segv;
442
443 err = __get_user(pc, &scptr->sigc_pc);
444 err |= __get_user(npc, &scptr->sigc_npc);
445
446 if ((pc | npc) & 3)
447 goto segv; /* Nice try. */
448
449 err |= __get_user(seta[0], &scptr->sigc_mask);
450 /* Note that scptr + 1 points to extramask */
451 err |= copy_from_user(seta+1, scptr + 1,
452 (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
453 if (err)
454 goto segv;
455 switch (_NSIG_WORDS) {
456 case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32);
457 case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32);
458 case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32);
459 case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32);
460 }
461 sigdelsetmask(&set, ~_BLOCKABLE);
462 spin_lock_irq(&current->sighand->siglock);
463 current->blocked = set;
464 recalc_sigpending();
465 spin_unlock_irq(&current->sighand->siglock);
466
467 if (test_thread_flag(TIF_32BIT)) {
468 pc &= 0xffffffff;
469 npc &= 0xffffffff;
470 }
471 regs->tpc = pc;
472 regs->tnpc = npc;
473 err = __get_user(regs->u_regs[UREG_FP], &scptr->sigc_sp);
474 err |= __get_user(regs->u_regs[UREG_I0], &scptr->sigc_o0);
475 err |= __get_user(regs->u_regs[UREG_G1], &scptr->sigc_g1);
476
477 /* User can only change condition codes in %tstate. */
478 err |= __get_user(psr, &scptr->sigc_psr);
479 if (err)
480 goto segv;
481 regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
482 regs->tstate |= psr_to_tstate_icc(psr);
483 return;
484
485segv:
486 force_sig(SIGSEGV, current);
487}
488
489asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
490{
491 struct rt_signal_frame32 __user *sf;
492 unsigned int psr, pc, npc, fpu_save, u_ss_sp;
493 mm_segment_t old_fs;
494 sigset_t set;
495 compat_sigset_t seta;
496 stack_t st;
497 int err, i;
498
499 /* Always make any pending restarted system calls return -EINTR */
500 current_thread_info()->restart_block.fn = do_no_restart_syscall;
501
502 synchronize_user_stack();
503 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
504 sf = (struct rt_signal_frame32 __user *) regs->u_regs[UREG_FP];
505
506 /* 1. Make sure we are not getting garbage from the user */
507 if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) ||
508 (((unsigned long) sf) & 3))
509 goto segv;
510
511 get_user(pc, &sf->regs.pc);
512 __get_user(npc, &sf->regs.npc);
513
514 if ((pc | npc) & 3)
515 goto segv;
516
517 if (test_thread_flag(TIF_32BIT)) {
518 pc &= 0xffffffff;
519 npc &= 0xffffffff;
520 }
521 regs->tpc = pc;
522 regs->tnpc = npc;
523
524 /* 2. Restore the state */
525 err = __get_user(regs->y, &sf->regs.y);
526 err |= __get_user(psr, &sf->regs.psr);
527
528 for (i = UREG_G1; i <= UREG_I7; i++)
529 err |= __get_user(regs->u_regs[i], &sf->regs.u_regs[i]);
530 if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
531 err |= __get_user(i, &sf->v8plus.g_upper[0]);
532 if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
533 unsigned long asi;
534
535 for (i = UREG_G1; i <= UREG_I7; i++)
536 err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
537 err |= __get_user(asi, &sf->v8plus.asi);
538 regs->tstate &= ~TSTATE_ASI;
539 regs->tstate |= ((asi & 0xffUL) << 24UL);
540 }
541 }
542
543 /* User can only change condition codes in %tstate. */
544 regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
545 regs->tstate |= psr_to_tstate_icc(psr);
546
547 err |= __get_user(fpu_save, &sf->fpu_save);
548 if (fpu_save)
549 err |= restore_fpu_state32(regs, &sf->fpu_state);
550 err |= copy_from_user(&seta, &sf->mask, sizeof(compat_sigset_t));
551 err |= __get_user(u_ss_sp, &sf->stack.ss_sp);
552 st.ss_sp = compat_ptr(u_ss_sp);
553 err |= __get_user(st.ss_flags, &sf->stack.ss_flags);
554 err |= __get_user(st.ss_size, &sf->stack.ss_size);
555 if (err)
556 goto segv;
557
558 /* It is more difficult to avoid calling this function than to
559 call it and ignore errors. */
560 old_fs = get_fs();
561 set_fs(KERNEL_DS);
562 do_sigaltstack((stack_t __user *) &st, NULL, (unsigned long)sf);
563 set_fs(old_fs);
564
565 switch (_NSIG_WORDS) {
566 case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32);
567 case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32);
568 case 2: set.sig[1] = seta.sig[2] + (((long)seta.sig[3]) << 32);
569 case 1: set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32);
570 }
571 sigdelsetmask(&set, ~_BLOCKABLE);
572 spin_lock_irq(&current->sighand->siglock);
573 current->blocked = set;
574 recalc_sigpending();
575 spin_unlock_irq(&current->sighand->siglock);
576 return;
577segv:
578 force_sig(SIGSEGV, current);
579}
580
581/* Checks if the fp is valid */
582static int invalid_frame_pointer(void __user *fp, int fplen)
583{
584 if ((((unsigned long) fp) & 7) || ((unsigned long)fp) > 0x100000000ULL - fplen)
585 return 1;
586 return 0;
587}
588
589static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize)
590{
591 unsigned long sp;
592
593 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
594 sp = regs->u_regs[UREG_FP];
595
596 /* This is the X/Open sanctioned signal stack switching. */
597 if (sa->sa_flags & SA_ONSTACK) {
598 if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
599 sp = current->sas_ss_sp + current->sas_ss_size;
600 }
601 return (void __user *)(sp - framesize);
602}
603
604static void
605setup_frame32(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *oldset, siginfo_t *info)
606{
607 struct signal_sframe32 __user *sframep;
608 struct sigcontext32 __user *sc;
609 unsigned int seta[_COMPAT_NSIG_WORDS];
610 int err = 0;
611 void __user *sig_address;
612 int sig_code;
613 unsigned long pc = regs->tpc;
614 unsigned long npc = regs->tnpc;
615 unsigned int psr;
616
617 if (test_thread_flag(TIF_32BIT)) {
618 pc &= 0xffffffff;
619 npc &= 0xffffffff;
620 }
621
622 synchronize_user_stack();
623 save_and_clear_fpu();
624
625 sframep = (struct signal_sframe32 __user *)
626 get_sigframe(sa, regs, SF_ALIGNEDSZ);
627 if (invalid_frame_pointer(sframep, sizeof(*sframep))){
628 /* Don't change signal code and address, so that
629 * post mortem debuggers can have a look.
630 */
631 do_exit(SIGILL);
632 }
633
634 sc = &sframep->sig_context;
635
636 /* We've already made sure frame pointer isn't in kernel space... */
637 err = __put_user((sas_ss_flags(regs->u_regs[UREG_FP]) == SS_ONSTACK),
638 &sc->sigc_onstack);
639
640 switch (_NSIG_WORDS) {
641 case 4: seta[7] = (oldset->sig[3] >> 32);
642 seta[6] = oldset->sig[3];
643 case 3: seta[5] = (oldset->sig[2] >> 32);
644 seta[4] = oldset->sig[2];
645 case 2: seta[3] = (oldset->sig[1] >> 32);
646 seta[2] = oldset->sig[1];
647 case 1: seta[1] = (oldset->sig[0] >> 32);
648 seta[0] = oldset->sig[0];
649 }
650 err |= __put_user(seta[0], &sc->sigc_mask);
651 err |= __copy_to_user(sframep->extramask, seta + 1,
652 (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
653 err |= __put_user(regs->u_regs[UREG_FP], &sc->sigc_sp);
654 err |= __put_user(pc, &sc->sigc_pc);
655 err |= __put_user(npc, &sc->sigc_npc);
656 psr = tstate_to_psr(regs->tstate);
657 if (current_thread_info()->fpsaved[0] & FPRS_FEF)
658 psr |= PSR_EF;
659 err |= __put_user(psr, &sc->sigc_psr);
660 err |= __put_user(regs->u_regs[UREG_G1], &sc->sigc_g1);
661 err |= __put_user(regs->u_regs[UREG_I0], &sc->sigc_o0);
662 err |= __put_user(get_thread_wsaved(), &sc->sigc_oswins);
663
664 err |= copy_in_user((u32 __user *)sframep,
665 (u32 __user *)(regs->u_regs[UREG_FP]),
666 sizeof(struct reg_window32));
667
668 set_thread_wsaved(0); /* So process is allowed to execute. */
669 err |= __put_user(signr, &sframep->sig_num);
670 sig_address = NULL;
671 sig_code = 0;
672 if (SI_FROMKERNEL (info) && (info->si_code & __SI_MASK) == __SI_FAULT) {
673 sig_address = info->si_addr;
674 switch (signr) {
675 case SIGSEGV:
676 switch (info->si_code) {
677 case SEGV_MAPERR: sig_code = SUBSIG_NOMAPPING; break;
678 default: sig_code = SUBSIG_PROTECTION; break;
679 }
680 break;
681 case SIGILL:
682 switch (info->si_code) {
683 case ILL_ILLOPC: sig_code = SUBSIG_ILLINST; break;
684 case ILL_PRVOPC: sig_code = SUBSIG_PRIVINST; break;
685 case ILL_ILLTRP: sig_code = SUBSIG_BADTRAP(info->si_trapno); break;
686 default: sig_code = SUBSIG_STACK; break;
687 }
688 break;
689 case SIGFPE:
690 switch (info->si_code) {
691 case FPE_INTDIV: sig_code = SUBSIG_IDIVZERO; break;
692 case FPE_INTOVF: sig_code = SUBSIG_FPINTOVFL; break;
693 case FPE_FLTDIV: sig_code = SUBSIG_FPDIVZERO; break;
694 case FPE_FLTOVF: sig_code = SUBSIG_FPOVFLOW; break;
695 case FPE_FLTUND: sig_code = SUBSIG_FPUNFLOW; break;
696 case FPE_FLTRES: sig_code = SUBSIG_FPINEXACT; break;
697 case FPE_FLTINV: sig_code = SUBSIG_FPOPERROR; break;
698 default: sig_code = SUBSIG_FPERROR; break;
699 }
700 break;
701 case SIGBUS:
702 switch (info->si_code) {
703 case BUS_ADRALN: sig_code = SUBSIG_ALIGNMENT; break;
704 case BUS_ADRERR: sig_code = SUBSIG_MISCERROR; break;
705 default: sig_code = SUBSIG_BUSTIMEOUT; break;
706 }
707 break;
708 case SIGEMT:
709 switch (info->si_code) {
710 case EMT_TAGOVF: sig_code = SUBSIG_TAG; break;
711 }
712 break;
713 case SIGSYS:
714 if (info->si_code == (__SI_FAULT|0x100)) {
715 /* See sys_sunos32.c */
716 sig_code = info->si_trapno;
717 break;
718 }
719 default:
720 sig_address = NULL;
721 }
722 }
723 err |= __put_user(ptr_to_compat(sig_address), &sframep->sig_address);
724 err |= __put_user(sig_code, &sframep->sig_code);
725 err |= __put_user(ptr_to_compat(sc), &sframep->sig_scptr);
726 if (err)
727 goto sigsegv;
728
729 regs->u_regs[UREG_FP] = (unsigned long) sframep;
730 regs->tpc = (unsigned long) sa->sa_handler;
731 regs->tnpc = (regs->tpc + 4);
732 if (test_thread_flag(TIF_32BIT)) {
733 regs->tpc &= 0xffffffff;
734 regs->tnpc &= 0xffffffff;
735 }
736 return;
737
738sigsegv:
739 force_sigsegv(signr, current);
740}
741
742
743static int save_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)
744{
745 unsigned long *fpregs = current_thread_info()->fpregs;
746 unsigned long fprs;
747 int err = 0;
748
749 fprs = current_thread_info()->fpsaved[0];
750 if (fprs & FPRS_DL)
751 err |= copy_to_user(&fpu->si_float_regs[0], fpregs,
752 (sizeof(unsigned int) * 32));
753 if (fprs & FPRS_DU)
754 err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16,
755 (sizeof(unsigned int) * 32));
756 err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr);
757 err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr);
758 err |= __put_user(fprs, &fpu->si_fprs);
759
760 return err;
761}
762
763static void new_setup_frame32(struct k_sigaction *ka, struct pt_regs *regs,
764 int signo, sigset_t *oldset)
765{
766 struct new_signal_frame32 __user *sf;
767 int sigframe_size;
768 u32 psr;
769 int i, err;
770 unsigned int seta[_COMPAT_NSIG_WORDS];
771
772 /* 1. Make sure everything is clean */
773 synchronize_user_stack();
774 save_and_clear_fpu();
775
776 sigframe_size = NF_ALIGNEDSZ;
777 if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
778 sigframe_size -= sizeof(__siginfo_fpu_t);
779
780 sf = (struct new_signal_frame32 __user *)
781 get_sigframe(&ka->sa, regs, sigframe_size);
782
783 if (invalid_frame_pointer(sf, sigframe_size))
784 goto sigill;
785
786 if (get_thread_wsaved() != 0)
787 goto sigill;
788
789 /* 2. Save the current process state */
790 if (test_thread_flag(TIF_32BIT)) {
791 regs->tpc &= 0xffffffff;
792 regs->tnpc &= 0xffffffff;
793 }
794 err = put_user(regs->tpc, &sf->info.si_regs.pc);
795 err |= __put_user(regs->tnpc, &sf->info.si_regs.npc);
796 err |= __put_user(regs->y, &sf->info.si_regs.y);
797 psr = tstate_to_psr(regs->tstate);
798 if (current_thread_info()->fpsaved[0] & FPRS_FEF)
799 psr |= PSR_EF;
800 err |= __put_user(psr, &sf->info.si_regs.psr);
801 for (i = 0; i < 16; i++)
802 err |= __put_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
803 err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
804 err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
805 for (i = 1; i < 16; i++)
806 err |= __put_user(((u32 *)regs->u_regs)[2*i],
807 &sf->v8plus.g_upper[i]);
808 err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
809 &sf->v8plus.asi);
810
811 if (psr & PSR_EF) {
812 err |= save_fpu_state32(regs, &sf->fpu_state);
813 err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
814 } else {
815 err |= __put_user(0, &sf->fpu_save);
816 }
817
818 switch (_NSIG_WORDS) {
819 case 4: seta[7] = (oldset->sig[3] >> 32);
820 seta[6] = oldset->sig[3];
821 case 3: seta[5] = (oldset->sig[2] >> 32);
822 seta[4] = oldset->sig[2];
823 case 2: seta[3] = (oldset->sig[1] >> 32);
824 seta[2] = oldset->sig[1];
825 case 1: seta[1] = (oldset->sig[0] >> 32);
826 seta[0] = oldset->sig[0];
827 }
828 err |= __put_user(seta[0], &sf->info.si_mask);
829 err |= __copy_to_user(sf->extramask, seta + 1,
830 (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
831
832 err |= copy_in_user((u32 __user *)sf,
833 (u32 __user *)(regs->u_regs[UREG_FP]),
834 sizeof(struct reg_window32));
835
836 if (err)
837 goto sigsegv;
838
839 /* 3. signal handler back-trampoline and parameters */
840 regs->u_regs[UREG_FP] = (unsigned long) sf;
841 regs->u_regs[UREG_I0] = signo;
842 regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
843 regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
844
845 /* 4. signal handler */
846 regs->tpc = (unsigned long) ka->sa.sa_handler;
847 regs->tnpc = (regs->tpc + 4);
848 if (test_thread_flag(TIF_32BIT)) {
849 regs->tpc &= 0xffffffff;
850 regs->tnpc &= 0xffffffff;
851 }
852
853 /* 5. return to kernel instructions */
854 if (ka->ka_restorer) {
855 regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
856 } else {
857 /* Flush instruction space. */
858 unsigned long address = ((unsigned long)&(sf->insns[0]));
859 pgd_t *pgdp = pgd_offset(current->mm, address);
860 pud_t *pudp = pud_offset(pgdp, address);
861 pmd_t *pmdp = pmd_offset(pudp, address);
862 pte_t *ptep;
863
864 regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
865
866 err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/
867 err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/
868 if (err)
869 goto sigsegv;
870
871 preempt_disable();
872 ptep = pte_offset_map(pmdp, address);
873 if (pte_present(*ptep)) {
874 unsigned long page = (unsigned long)
875 page_address(pte_page(*ptep));
876
877 __asm__ __volatile__(
878 " membar #StoreStore\n"
879 " flush %0 + %1"
880 : : "r" (page), "r" (address & (PAGE_SIZE - 1))
881 : "memory");
882 }
883 pte_unmap(ptep);
884 preempt_enable();
885 }
886 return;
887
888sigill:
889 do_exit(SIGILL);
890sigsegv:
891 force_sigsegv(signo, current);
892}
893
894/* Setup a Solaris stack frame */
895static void
896setup_svr4_frame32(struct sigaction *sa, unsigned long pc, unsigned long npc,
897 struct pt_regs *regs, int signr, sigset_t *oldset)
898{
899 svr4_signal_frame_t __user *sfp;
900 svr4_gregset_t __user *gr;
901 svr4_siginfo_t __user *si;
902 svr4_mcontext_t __user *mc;
903 svr4_gwindows_t __user *gw;
904 svr4_ucontext_t __user *uc;
905 svr4_sigset_t setv;
906 unsigned int psr;
907 int i, err;
908
909 synchronize_user_stack();
910 save_and_clear_fpu();
911
912 regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
913 sfp = (svr4_signal_frame_t __user *)
914 get_sigframe(sa, regs,
915 sizeof(struct reg_window32) + SVR4_SF_ALIGNED);
916
917 if (invalid_frame_pointer(sfp, sizeof(*sfp)))
918 do_exit(SIGILL);
919
920 /* Start with a clean frame pointer and fill it */
921 err = clear_user(sfp, sizeof(*sfp));
922
923 /* Setup convenience variables */
924 si = &sfp->si;
925 uc = &sfp->uc;
926 gw = &sfp->gw;
927 mc = &uc->mcontext;
928 gr = &mc->greg;
929
930 /* FIXME: where am I supposed to put this?
931 * sc->sigc_onstack = old_status;
932 * anyways, it does not look like it is used for anything at all.
933 */
934 setv.sigbits[0] = oldset->sig[0];
935 setv.sigbits[1] = (oldset->sig[0] >> 32);
936 if (_NSIG_WORDS >= 2) {
937 setv.sigbits[2] = oldset->sig[1];
938 setv.sigbits[3] = (oldset->sig[1] >> 32);
939 err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
940 } else
941 err |= __copy_to_user(&uc->sigmask, &setv,
942 2 * sizeof(unsigned int));
943
944 /* Store registers */
945 if (test_thread_flag(TIF_32BIT)) {
946 regs->tpc &= 0xffffffff;
947 regs->tnpc &= 0xffffffff;
948 }
949 err |= __put_user(regs->tpc, &((*gr)[SVR4_PC]));
950 err |= __put_user(regs->tnpc, &((*gr)[SVR4_NPC]));
951 psr = tstate_to_psr(regs->tstate);
952 if (current_thread_info()->fpsaved[0] & FPRS_FEF)
953 psr |= PSR_EF;
954 err |= __put_user(psr, &((*gr)[SVR4_PSR]));
955 err |= __put_user(regs->y, &((*gr)[SVR4_Y]));
956
957 /* Copy g[1..7] and o[0..7] registers */
958 for (i = 0; i < 7; i++)
959 err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
960 for (i = 0; i < 8; i++)
961 err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
962
963 /* Setup sigaltstack */
964 err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
965 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
966 err |= __put_user(current->sas_ss_size, &uc->stack.size);
967
968 /* Save the currently window file: */
969
970 /* 1. Link sfp->uc->gwins to our windows */
971 err |= __put_user(ptr_to_compat(gw), &mc->gwin);
972
973 /* 2. Number of windows to restore at setcontext (): */
974 err |= __put_user(get_thread_wsaved(), &gw->count);
975
976 /* 3. We just pay attention to the gw->count field on setcontext */
977 set_thread_wsaved(0); /* So process is allowed to execute. */
978
979 /* Setup the signal information. Solaris expects a bunch of
980 * information to be passed to the signal handler, we don't provide
981 * that much currently, should use siginfo.
982 */
983 err |= __put_user(signr, &si->siginfo.signo);
984 err |= __put_user(SVR4_SINOINFO, &si->siginfo.code);
985 if (err)
986 goto sigsegv;
987
988 regs->u_regs[UREG_FP] = (unsigned long) sfp;
989 regs->tpc = (unsigned long) sa->sa_handler;
990 regs->tnpc = (regs->tpc + 4);
991 if (test_thread_flag(TIF_32BIT)) {
992 regs->tpc &= 0xffffffff;
993 regs->tnpc &= 0xffffffff;
994 }
995
996 /* Arguments passed to signal handler */
997 if (regs->u_regs[14]){
998 struct reg_window32 __user *rw = (struct reg_window32 __user *)
999 (regs->u_regs[14] & 0x00000000ffffffffUL);
1000
1001 err |= __put_user(signr, &rw->ins[0]);
1002 err |= __put_user((u64)si, &rw->ins[1]);
1003 err |= __put_user((u64)uc, &rw->ins[2]);
1004 err |= __put_user((u64)sfp, &rw->ins[6]); /* frame pointer */
1005 if (err)
1006 goto sigsegv;
1007
1008 regs->u_regs[UREG_I0] = signr;
1009 regs->u_regs[UREG_I1] = (u32)(u64) si;
1010 regs->u_regs[UREG_I2] = (u32)(u64) uc;
1011 }
1012 return;
1013
1014sigsegv:
1015 force_sigsegv(signr, current);
1016}
1017
1018asmlinkage int
1019svr4_getcontext(svr4_ucontext_t __user *uc, struct pt_regs *regs)
1020{
1021 svr4_gregset_t __user *gr;
1022 svr4_mcontext_t __user *mc;
1023 svr4_sigset_t setv;
1024 int i, err;
1025 u32 psr;
1026
1027 synchronize_user_stack();
1028 save_and_clear_fpu();
1029
1030 if (get_thread_wsaved())
1031 do_exit(SIGSEGV);
1032
1033 err = clear_user(uc, sizeof(*uc));
1034
1035 /* Setup convenience variables */
1036 mc = &uc->mcontext;
1037 gr = &mc->greg;
1038
1039 setv.sigbits[0] = current->blocked.sig[0];
1040 setv.sigbits[1] = (current->blocked.sig[0] >> 32);
1041 if (_NSIG_WORDS >= 2) {
1042 setv.sigbits[2] = current->blocked.sig[1];
1043 setv.sigbits[3] = (current->blocked.sig[1] >> 32);
1044 err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t));
1045 } else
1046 err |= __copy_to_user(&uc->sigmask, &setv, 2 * sizeof(unsigned));
1047
1048 /* Store registers */
1049 if (test_thread_flag(TIF_32BIT)) {
1050 regs->tpc &= 0xffffffff;
1051 regs->tnpc &= 0xffffffff;
1052 }
1053 err |= __put_user(regs->tpc, &uc->mcontext.greg[SVR4_PC]);
1054 err |= __put_user(regs->tnpc, &uc->mcontext.greg[SVR4_NPC]);
1055
1056 psr = tstate_to_psr(regs->tstate) & ~PSR_EF;
1057 if (current_thread_info()->fpsaved[0] & FPRS_FEF)
1058 psr |= PSR_EF;
1059 err |= __put_user(psr, &uc->mcontext.greg[SVR4_PSR]);
1060
1061 err |= __put_user(regs->y, &uc->mcontext.greg[SVR4_Y]);
1062
1063 /* Copy g[1..7] and o[0..7] registers */
1064 for (i = 0; i < 7; i++)
1065 err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
1066 for (i = 0; i < 8; i++)
1067 err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
1068
1069 /* Setup sigaltstack */
1070 err |= __put_user(current->sas_ss_sp, &uc->stack.sp);
1071 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags);
1072 err |= __put_user(current->sas_ss_size, &uc->stack.size);
1073
1074 /* The register file is not saved
1075 * we have already stuffed all of it with sync_user_stack
1076 */
1077 return (err ? -EFAULT : 0);
1078}
1079
1080
1081/* Set the context for a svr4 application, this is Solaris way to sigreturn */
1082asmlinkage int svr4_setcontext(svr4_ucontext_t __user *c, struct pt_regs *regs)
1083{
1084 svr4_gregset_t __user *gr;
1085 mm_segment_t old_fs;
1086 u32 pc, npc, psr, u_ss_sp;
1087 sigset_t set;
1088 svr4_sigset_t setv;
1089 int i, err;
1090 stack_t st;
1091
1092 /* Fixme: restore windows, or is this already taken care of in
1093 * svr4_setup_frame when sync_user_windows is done?
1094 */
1095 flush_user_windows();
1096
1097 if (get_thread_wsaved())
1098 goto sigsegv;
1099
1100 if (((unsigned long) c) & 3){
1101 printk("Unaligned structure passed\n");
1102 goto sigsegv;
1103 }
1104
1105 if (!__access_ok(c, sizeof(*c))) {
1106 /* Miguel, add nice debugging msg _here_. ;-) */
1107 goto sigsegv;
1108 }
1109
1110 /* Check for valid PC and nPC */
1111 gr = &c->mcontext.greg;
1112 err = __get_user(pc, &((*gr)[SVR4_PC]));
1113 err |= __get_user(npc, &((*gr)[SVR4_NPC]));
1114 if ((pc | npc) & 3)
1115 goto sigsegv;
1116
1117 /* Retrieve information from passed ucontext */
1118 /* note that nPC is ored a 1, this is used to inform entry.S */
1119 /* that we don't want it to mess with our PC and nPC */
1120
1121 err |= copy_from_user(&setv, &c->sigmask, sizeof(svr4_sigset_t));
1122 set.sig[0] = setv.sigbits[0] | (((long)setv.sigbits[1]) << 32);
1123 if (_NSIG_WORDS >= 2)
1124 set.sig[1] = setv.sigbits[2] | (((long)setv.sigbits[3]) << 32);
1125
1126 err |= __get_user(u_ss_sp, &c->stack.sp);
1127 st.ss_sp = compat_ptr(u_ss_sp);
1128 err |= __get_user(st.ss_flags, &c->stack.flags);
1129 err |= __get_user(st.ss_size, &c->stack.size);
1130 if (err)
1131 goto sigsegv;
1132
1133 /* It is more difficult to avoid calling this function than to
1134 call it and ignore errors. */
1135 old_fs = get_fs();
1136 set_fs(KERNEL_DS);
1137 do_sigaltstack((stack_t __user *) &st, NULL, regs->u_regs[UREG_I6]);
1138 set_fs(old_fs);
1139
1140 sigdelsetmask(&set, ~_BLOCKABLE);
1141 spin_lock_irq(&current->sighand->siglock);
1142 current->blocked = set;
1143 recalc_sigpending();
1144 spin_unlock_irq(&current->sighand->siglock);
1145 regs->tpc = pc;
1146 regs->tnpc = npc | 1;
1147 if (test_thread_flag(TIF_32BIT)) {
1148 regs->tpc &= 0xffffffff;
1149 regs->tnpc &= 0xffffffff;
1150 }
1151 err |= __get_user(regs->y, &((*gr)[SVR4_Y]));
1152 err |= __get_user(psr, &((*gr)[SVR4_PSR]));
1153 regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
1154 regs->tstate |= psr_to_tstate_icc(psr);
1155
1156 /* Restore g[1..7] and o[0..7] registers */
1157 for (i = 0; i < 7; i++)
1158 err |= __get_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i);
1159 for (i = 0; i < 8; i++)
1160 err |= __get_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i);
1161 if (err)
1162 goto sigsegv;
1163
1164 return -EINTR;
1165sigsegv:
1166 return -EFAULT;
1167}
1168
1169static void setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs,
1170 unsigned long signr, sigset_t *oldset,
1171 siginfo_t *info)
1172{
1173 struct rt_signal_frame32 __user *sf;
1174 int sigframe_size;
1175 u32 psr;
1176 int i, err;
1177 compat_sigset_t seta;
1178
1179 /* 1. Make sure everything is clean */
1180 synchronize_user_stack();
1181 save_and_clear_fpu();
1182
1183 sigframe_size = RT_ALIGNEDSZ;
1184 if (!(current_thread_info()->fpsaved[0] & FPRS_FEF))
1185 sigframe_size -= sizeof(__siginfo_fpu_t);
1186
1187 sf = (struct rt_signal_frame32 __user *)
1188 get_sigframe(&ka->sa, regs, sigframe_size);
1189
1190 if (invalid_frame_pointer(sf, sigframe_size))
1191 goto sigill;
1192
1193 if (get_thread_wsaved() != 0)
1194 goto sigill;
1195
1196 /* 2. Save the current process state */
1197 if (test_thread_flag(TIF_32BIT)) {
1198 regs->tpc &= 0xffffffff;
1199 regs->tnpc &= 0xffffffff;
1200 }
1201 err = put_user(regs->tpc, &sf->regs.pc);
1202 err |= __put_user(regs->tnpc, &sf->regs.npc);
1203 err |= __put_user(regs->y, &sf->regs.y);
1204 psr = tstate_to_psr(regs->tstate);
1205 if (current_thread_info()->fpsaved[0] & FPRS_FEF)
1206 psr |= PSR_EF;
1207 err |= __put_user(psr, &sf->regs.psr);
1208 for (i = 0; i < 16; i++)
1209 err |= __put_user(regs->u_regs[i], &sf->regs.u_regs[i]);
1210 err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
1211 err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
1212 for (i = 1; i < 16; i++)
1213 err |= __put_user(((u32 *)regs->u_regs)[2*i],
1214 &sf->v8plus.g_upper[i]);
1215 err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
1216 &sf->v8plus.asi);
1217
1218 if (psr & PSR_EF) {
1219 err |= save_fpu_state32(regs, &sf->fpu_state);
1220 err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save);
1221 } else {
1222 err |= __put_user(0, &sf->fpu_save);
1223 }
1224
1225 /* Update the siginfo structure. */
1226 err |= copy_siginfo_to_user32(&sf->info, info);
1227
1228 /* Setup sigaltstack */
1229 err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp);
1230 err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags);
1231 err |= __put_user(current->sas_ss_size, &sf->stack.ss_size);
1232
1233 switch (_NSIG_WORDS) {
1234 case 4: seta.sig[7] = (oldset->sig[3] >> 32);
1235 seta.sig[6] = oldset->sig[3];
1236 case 3: seta.sig[5] = (oldset->sig[2] >> 32);
1237 seta.sig[4] = oldset->sig[2];
1238 case 2: seta.sig[3] = (oldset->sig[1] >> 32);
1239 seta.sig[2] = oldset->sig[1];
1240 case 1: seta.sig[1] = (oldset->sig[0] >> 32);
1241 seta.sig[0] = oldset->sig[0];
1242 }
1243 err |= __copy_to_user(&sf->mask, &seta, sizeof(compat_sigset_t));
1244
1245 err |= copy_in_user((u32 __user *)sf,
1246 (u32 __user *)(regs->u_regs[UREG_FP]),
1247 sizeof(struct reg_window32));
1248 if (err)
1249 goto sigsegv;
1250
1251 /* 3. signal handler back-trampoline and parameters */
1252 regs->u_regs[UREG_FP] = (unsigned long) sf;
1253 regs->u_regs[UREG_I0] = signr;
1254 regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
1255 regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
1256
1257 /* 4. signal handler */
1258 regs->tpc = (unsigned long) ka->sa.sa_handler;
1259 regs->tnpc = (regs->tpc + 4);
1260 if (test_thread_flag(TIF_32BIT)) {
1261 regs->tpc &= 0xffffffff;
1262 regs->tnpc &= 0xffffffff;
1263 }
1264
1265 /* 5. return to kernel instructions */
1266 if (ka->ka_restorer)
1267 regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer;
1268 else {
1269 /* Flush instruction space. */
1270 unsigned long address = ((unsigned long)&(sf->insns[0]));
1271 pgd_t *pgdp = pgd_offset(current->mm, address);
1272 pud_t *pudp = pud_offset(pgdp, address);
1273 pmd_t *pmdp = pmd_offset(pudp, address);
1274 pte_t *ptep;
1275
1276 regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
1277
1278 /* mov __NR_rt_sigreturn, %g1 */
1279 err |= __put_user(0x82102065, &sf->insns[0]);
1280
1281 /* t 0x10 */
1282 err |= __put_user(0x91d02010, &sf->insns[1]);
1283 if (err)
1284 goto sigsegv;
1285
1286 preempt_disable();
1287 ptep = pte_offset_map(pmdp, address);
1288 if (pte_present(*ptep)) {
1289 unsigned long page = (unsigned long)
1290 page_address(pte_page(*ptep));
1291
1292 __asm__ __volatile__(
1293 " membar #StoreStore\n"
1294 " flush %0 + %1"
1295 : : "r" (page), "r" (address & (PAGE_SIZE - 1))
1296 : "memory");
1297 }
1298 pte_unmap(ptep);
1299 preempt_enable();
1300 }
1301 return;
1302
1303sigill:
1304 do_exit(SIGILL);
1305sigsegv:
1306 force_sigsegv(signr, current);
1307}
1308
1309static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka,
1310 siginfo_t *info,
1311 sigset_t *oldset, struct pt_regs *regs,
1312 int svr4_signal)
1313{
1314 if (svr4_signal)
1315 setup_svr4_frame32(&ka->sa, regs->tpc, regs->tnpc,
1316 regs, signr, oldset);
1317 else {
1318 if (ka->sa.sa_flags & SA_SIGINFO)
1319 setup_rt_frame32(ka, regs, signr, oldset, info);
1320 else if (test_thread_flag(TIF_NEWSIGNALS))
1321 new_setup_frame32(ka, regs, signr, oldset);
1322 else
1323 setup_frame32(&ka->sa, regs, signr, oldset, info);
1324 }
1325 if (!(ka->sa.sa_flags & SA_NOMASK)) {
1326 spin_lock_irq(&current->sighand->siglock);
1327 sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
1328 sigaddset(&current->blocked,signr);
1329 recalc_sigpending();
1330 spin_unlock_irq(&current->sighand->siglock);
1331 }
1332}
1333
1334static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs,
1335 struct sigaction *sa)
1336{
1337 switch (regs->u_regs[UREG_I0]) {
1338 case ERESTART_RESTARTBLOCK:
1339 case ERESTARTNOHAND:
1340 no_system_call_restart:
1341 regs->u_regs[UREG_I0] = EINTR;
1342 regs->tstate |= TSTATE_ICARRY;
1343 break;
1344 case ERESTARTSYS:
1345 if (!(sa->sa_flags & SA_RESTART))
1346 goto no_system_call_restart;
1347 /* fallthrough */
1348 case ERESTARTNOINTR:
1349 regs->u_regs[UREG_I0] = orig_i0;
1350 regs->tpc -= 4;
1351 regs->tnpc -= 4;
1352 }
1353}
1354
1355/* Note that 'init' is a special process: it doesn't get signals it doesn't
1356 * want to handle. Thus you cannot kill init even with a SIGKILL even by
1357 * mistake.
1358 */
1359int do_signal32(sigset_t *oldset, struct pt_regs * regs,
1360 unsigned long orig_i0, int restart_syscall)
1361{
1362 siginfo_t info;
1363 struct signal_deliver_cookie cookie;
1364 struct k_sigaction ka;
1365 int signr;
1366 int svr4_signal = current->personality == PER_SVR4;
1367
1368 cookie.restart_syscall = restart_syscall;
1369 cookie.orig_i0 = orig_i0;
1370
1371 signr = get_signal_to_deliver(&info, &ka, regs, &cookie);
1372 if (signr > 0) {
1373 if (cookie.restart_syscall)
1374 syscall_restart32(orig_i0, regs, &ka.sa);
1375 handle_signal32(signr, &ka, &info, oldset,
1376 regs, svr4_signal);
1377 return 1;
1378 }
1379 if (cookie.restart_syscall &&
1380 (regs->u_regs[UREG_I0] == ERESTARTNOHAND ||
1381 regs->u_regs[UREG_I0] == ERESTARTSYS ||
1382 regs->u_regs[UREG_I0] == ERESTARTNOINTR)) {
1383 /* replay the system call when we are done */
1384 regs->u_regs[UREG_I0] = cookie.orig_i0;
1385 regs->tpc -= 4;
1386 regs->tnpc -= 4;
1387 }
1388 if (cookie.restart_syscall &&
1389 regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) {
1390 regs->u_regs[UREG_G1] = __NR_restart_syscall;
1391 regs->tpc -= 4;
1392 regs->tnpc -= 4;
1393 }
1394 return 0;
1395}
1396
1397struct sigstack32 {
1398 u32 the_stack;
1399 int cur_status;
1400};
1401
1402asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp)
1403{
1404 struct sigstack32 __user *ssptr =
1405 (struct sigstack32 __user *)((unsigned long)(u_ssptr));
1406 struct sigstack32 __user *ossptr =
1407 (struct sigstack32 __user *)((unsigned long)(u_ossptr));
1408 int ret = -EFAULT;
1409
1410 /* First see if old state is wanted. */
1411 if (ossptr) {
1412 if (put_user(current->sas_ss_sp + current->sas_ss_size,
1413 &ossptr->the_stack) ||
1414 __put_user(on_sig_stack(sp), &ossptr->cur_status))
1415 goto out;
1416 }
1417
1418 /* Now see if we want to update the new state. */
1419 if (ssptr) {
1420 u32 ss_sp;
1421
1422 if (get_user(ss_sp, &ssptr->the_stack))
1423 goto out;
1424
1425 /* If the current stack was set with sigaltstack, don't
1426 * swap stacks while we are on it.
1427 */
1428 ret = -EPERM;
1429 if (current->sas_ss_sp && on_sig_stack(sp))
1430 goto out;
1431
1432 /* Since we don't know the extent of the stack, and we don't
1433 * track onstack-ness, but rather calculate it, we must
1434 * presume a size. Ho hum this interface is lossy.
1435 */
1436 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
1437 current->sas_ss_size = SIGSTKSZ;
1438 }
1439
1440 ret = 0;
1441out:
1442 return ret;
1443}
1444
1445asmlinkage long do_sys32_sigaltstack(u32 ussa, u32 uossa, unsigned long sp)
1446{
1447 stack_t uss, uoss;
1448 u32 u_ss_sp = 0;
1449 int ret;
1450 mm_segment_t old_fs;
1451 stack_t32 __user *uss32 = compat_ptr(ussa);
1452 stack_t32 __user *uoss32 = compat_ptr(uossa);
1453
1454 if (ussa && (get_user(u_ss_sp, &uss32->ss_sp) ||
1455 __get_user(uss.ss_flags, &uss32->ss_flags) ||
1456 __get_user(uss.ss_size, &uss32->ss_size)))
1457 return -EFAULT;
1458 uss.ss_sp = compat_ptr(u_ss_sp);
1459 old_fs = get_fs();
1460 set_fs(KERNEL_DS);
1461 ret = do_sigaltstack(ussa ? (stack_t __user *) &uss : NULL,
1462 uossa ? (stack_t __user *) &uoss : NULL, sp);
1463 set_fs(old_fs);
1464 if (!ret && uossa && (put_user(ptr_to_compat(uoss.ss_sp), &uoss32->ss_sp) ||
1465 __put_user(uoss.ss_flags, &uoss32->ss_flags) ||
1466 __put_user(uoss.ss_size, &uoss32->ss_size)))
1467 return -EFAULT;
1468 return ret;
1469}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-24 13:01:15 -0500