File: /usr/src/linux/arch/sparc64/solaris/signal.c
1 /* $Id: signal.c,v 1.7 2000/09/05 21:44:54 davem Exp $
2 * signal.c: Signal emulation for Solaris
3 *
4 * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 */
6
7 #include <linux/types.h>
8 #include <linux/smp_lock.h>
9
10 #include <asm/uaccess.h>
11 #include <asm/svr4.h>
12 #include <asm/string.h>
13
14 #include "conv.h"
15 #include "signal.h"
16
17 #define _S(nr) (1L<<((nr)-1))
18
19 #define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
20
21 long linux_to_solaris_signals[] = {
22 0,
23 SOLARIS_SIGHUP, SOLARIS_SIGINT,
24 SOLARIS_SIGQUIT, SOLARIS_SIGILL,
25 SOLARIS_SIGTRAP, SOLARIS_SIGIOT,
26 SOLARIS_SIGEMT, SOLARIS_SIGFPE,
27 SOLARIS_SIGKILL, SOLARIS_SIGBUS,
28 SOLARIS_SIGSEGV, SOLARIS_SIGSYS,
29 SOLARIS_SIGPIPE, SOLARIS_SIGALRM,
30 SOLARIS_SIGTERM, SOLARIS_SIGURG,
31 SOLARIS_SIGSTOP, SOLARIS_SIGTSTP,
32 SOLARIS_SIGCONT, SOLARIS_SIGCLD,
33 SOLARIS_SIGTTIN, SOLARIS_SIGTTOU,
34 SOLARIS_SIGPOLL, SOLARIS_SIGXCPU,
35 SOLARIS_SIGXFSZ, SOLARIS_SIGVTALRM,
36 SOLARIS_SIGPROF, SOLARIS_SIGWINCH,
37 SOLARIS_SIGUSR1, SOLARIS_SIGUSR1,
38 SOLARIS_SIGUSR2, -1,
39 };
40
41 long solaris_to_linux_signals[] = {
42 0,
43 SIGHUP, SIGINT, SIGQUIT, SIGILL,
44 SIGTRAP, SIGIOT, SIGEMT, SIGFPE,
45 SIGKILL, SIGBUS, SIGSEGV, SIGSYS,
46 SIGPIPE, SIGALRM, SIGTERM, SIGUSR1,
47 SIGUSR2, SIGCHLD, -1, SIGWINCH,
48 SIGURG, SIGPOLL, SIGSTOP, SIGTSTP,
49 SIGCONT, SIGTTIN, SIGTTOU, SIGVTALRM,
50 SIGPROF, SIGXCPU, SIGXFSZ, -1,
51 -1, -1, -1, -1,
52 -1, -1, -1, -1,
53 -1, -1, -1, -1,
54 };
55
56 static inline long mapsig(long sig)
57 {
58 if ((unsigned long)sig > SOLARIS_NSIGNALS)
59 return -EINVAL;
60 return solaris_to_linux_signals[sig];
61 }
62
63 asmlinkage int solaris_kill(int pid, int sig)
64 {
65 int (*sys_kill)(int,int) =
66 (int (*)(int,int))SYS(kill);
67 int s = mapsig(sig);
68
69 if (s < 0) return s;
70 return sys_kill(pid, s);
71 }
72
73 static long sig_handler(int sig, u32 arg, int one_shot)
74 {
75 struct sigaction sa, old;
76 int ret;
77 mm_segment_t old_fs = get_fs();
78 int (*sys_sigaction)(int,struct sigaction *,struct sigaction *) =
79 (int (*)(int,struct sigaction *,struct sigaction *))SYS(sigaction);
80
81 sigemptyset(&sa.sa_mask);
82 sa.sa_restorer = NULL;
83 sa.sa_handler = (__sighandler_t)A(arg);
84 sa.sa_flags = 0;
85 if (one_shot) sa.sa_flags = SA_ONESHOT | SA_NOMASK;
86 set_fs (KERNEL_DS);
87 ret = sys_sigaction(sig, &sa, &old);
88 set_fs (old_fs);
89 if (ret < 0) return ret;
90 return (u32)(long)old.sa_handler;
91 }
92
93 static inline long solaris_signal(int sig, u32 arg)
94 {
95 return sig_handler (sig, arg, 1);
96 }
97
98 static long solaris_sigset(int sig, u32 arg)
99 {
100 if (arg != 2) /* HOLD */ {
101 spin_lock_irq(¤t->sigmask_lock);
102 sigdelsetmask(¤t->blocked, _S(sig));
103 recalc_sigpending(current);
104 spin_unlock_irq(¤t->sigmask_lock);
105 return sig_handler (sig, arg, 0);
106 } else {
107 spin_lock_irq(¤t->sigmask_lock);
108 sigaddsetmask(¤t->blocked, (_S(sig) & ~_BLOCKABLE));
109 recalc_sigpending(current);
110 spin_unlock_irq(¤t->sigmask_lock);
111 return 0;
112 }
113 }
114
115 static inline long solaris_sighold(int sig)
116 {
117 return solaris_sigset(sig, 2);
118 }
119
120 static inline long solaris_sigrelse(int sig)
121 {
122 spin_lock_irq(¤t->sigmask_lock);
123 sigdelsetmask(¤t->blocked, _S(sig));
124 recalc_sigpending(current);
125 spin_unlock_irq(¤t->sigmask_lock);
126 return 0;
127 }
128
129 static inline long solaris_sigignore(int sig)
130 {
131 return sig_handler (sig, (u32)SIG_IGN, 0);
132 }
133
134 static inline long solaris_sigpause(int sig)
135 {
136 printk ("Need to support solaris sigpause\n");
137 return -ENOSYS;
138 }
139
140 asmlinkage long solaris_sigfunc(int sig, u32 arg)
141 {
142 int func = sig & ~0xff;
143
144 sig = mapsig(sig & 0xff);
145 if (sig < 0) return sig;
146 switch (func) {
147 case 0: return solaris_signal(sig, arg);
148 case 0x100: return solaris_sigset(sig, arg);
149 case 0x200: return solaris_sighold(sig);
150 case 0x400: return solaris_sigrelse(sig);
151 case 0x800: return solaris_sigignore(sig);
152 case 0x1000: return solaris_sigpause(sig);
153 }
154 return -EINVAL;
155 }
156
157 typedef struct {
158 u32 __sigbits[4];
159 } sol_sigset_t;
160
161 static inline int mapin(u32 *p, sigset_t *q)
162 {
163 int i;
164 u32 x;
165 int sig;
166
167 sigemptyset(q);
168 x = p[0];
169 for (i = 1; i <= SOLARIS_NSIGNALS; i++) {
170 if (x & 1) {
171 sig = solaris_to_linux_signals[i];
172 if (sig == -1)
173 return -EINVAL;
174 sigaddsetmask(q, (1L << (sig - 1)));
175 }
176 x >>= 1;
177 if (i == 32)
178 x = p[1];
179 }
180 return 0;
181 }
182
183 static inline int mapout(sigset_t *q, u32 *p)
184 {
185 int i;
186 int sig;
187
188 p[0] = 0;
189 p[1] = 0;
190 for (i = 1; i <= 32; i++) {
191 if (sigismember(q, sigmask(i))) {
192 sig = linux_to_solaris_signals[i];
193 if (sig == -1)
194 return -EINVAL;
195 if (sig > 32)
196 p[1] |= 1L << (sig - 33);
197 else
198 p[0] |= 1L << (sig - 1);
199 }
200 }
201 return 0;
202 }
203
204 asmlinkage int solaris_sigprocmask(int how, u32 in, u32 out)
205 {
206 sigset_t in_s, *ins, out_s, *outs;
207 mm_segment_t old_fs = get_fs();
208 int ret;
209 int (*sys_sigprocmask)(int,sigset_t *,sigset_t *) =
210 (int (*)(int,sigset_t *,sigset_t *))SYS(sigprocmask);
211
212 ins = NULL; outs = NULL;
213 if (in) {
214 u32 tmp[2];
215
216 if (copy_from_user (tmp, (sol_sigset_t *)A(in), 2*sizeof(u32)))
217 return -EFAULT;
218 ins = &in_s;
219 if (mapin (tmp, ins)) return -EINVAL;
220 }
221 if (out) outs = &out_s;
222 set_fs (KERNEL_DS);
223 ret = sys_sigprocmask((how == 3) ? SIG_SETMASK : how, ins, outs);
224 set_fs (old_fs);
225 if (ret) return ret;
226 if (out) {
227 u32 tmp[4];
228
229 tmp[2] = 0; tmp[3] = 0;
230 if (mapout (outs, tmp)) return -EINVAL;
231 if (copy_to_user((sol_sigset_t *)A(out), tmp, 4*sizeof(u32)))
232 return -EFAULT;
233 }
234 return 0;
235 }
236
237 asmlinkage long do_sol_sigsuspend(u32 mask)
238 {
239 sigset_t s;
240 u32 tmp[2];
241
242 if (copy_from_user (tmp, (sol_sigset_t *)A(mask), 2*sizeof(u32)))
243 return -EFAULT;
244 if (mapin (tmp, &s)) return -EINVAL;
245 return (long)s.sig[0];
246 }
247
248 struct sol_sigaction {
249 int sa_flags;
250 u32 sa_handler;
251 u32 sa_mask[4];
252 int sa_resv[2];
253 };
254
255 asmlinkage int solaris_sigaction(int sig, u32 act, u32 old)
256 {
257 u32 tmp, tmp2[4];
258 struct sigaction s, s2;
259 int ret;
260 mm_segment_t old_fs = get_fs();
261 int (*sys_sigaction)(int,struct sigaction *,struct sigaction *) =
262 (int (*)(int,struct sigaction *,struct sigaction *))SYS(sigaction);
263
264 sig = mapsig(sig);
265 if (sig < 0) {
266 /* We cheat a little bit for Solaris only signals */
267 if (old && clear_user((struct sol_sigaction *)A(old), sizeof(struct sol_sigaction)))
268 return -EFAULT;
269 return 0;
270 }
271 if (act) {
272 if (get_user (tmp, &((struct sol_sigaction *)A(act))->sa_flags))
273 return -EFAULT;
274 s.sa_flags = 0;
275 if (tmp & SOLARIS_SA_ONSTACK) s.sa_flags |= SA_STACK;
276 if (tmp & SOLARIS_SA_RESTART) s.sa_flags |= SA_RESTART;
277 if (tmp & SOLARIS_SA_NODEFER) s.sa_flags |= SA_NOMASK;
278 if (tmp & SOLARIS_SA_RESETHAND) s.sa_flags |= SA_ONESHOT;
279 if (tmp & SOLARIS_SA_NOCLDSTOP) s.sa_flags |= SA_NOCLDSTOP;
280 if (get_user (tmp, &((struct sol_sigaction *)A(act))->sa_handler) ||
281 copy_from_user (tmp2, &((struct sol_sigaction *)A(act))->sa_mask, 2*sizeof(u32)))
282 return -EFAULT;
283 s.sa_handler = (__sighandler_t)A(tmp);
284 if (mapin (tmp2, &s.sa_mask)) return -EINVAL;
285 s.sa_restorer = 0;
286 }
287 set_fs(KERNEL_DS);
288 ret = sys_sigaction(sig, act ? &s : NULL, old ? &s2 : NULL);
289 set_fs(old_fs);
290 if (ret) return ret;
291 if (old) {
292 if (mapout (&s2.sa_mask, tmp2)) return -EINVAL;
293 tmp = 0; tmp2[2] = 0; tmp2[3] = 0;
294 if (s2.sa_flags & SA_STACK) tmp |= SOLARIS_SA_ONSTACK;
295 if (s2.sa_flags & SA_RESTART) tmp |= SOLARIS_SA_RESTART;
296 if (s2.sa_flags & SA_NOMASK) tmp |= SOLARIS_SA_NODEFER;
297 if (s2.sa_flags & SA_ONESHOT) tmp |= SOLARIS_SA_RESETHAND;
298 if (s2.sa_flags & SA_NOCLDSTOP) tmp |= SOLARIS_SA_NOCLDSTOP;
299 if (put_user (tmp, &((struct sol_sigaction *)A(old))->sa_flags) ||
300 __put_user ((u32)(long)s2.sa_handler, &((struct sol_sigaction *)A(old))->sa_handler) ||
301 copy_to_user (&((struct sol_sigaction *)A(old))->sa_mask, tmp2, 4*sizeof(u32)))
302 return -EFAULT;
303 }
304 return 0;
305 }
306
307 asmlinkage int solaris_sigpending(int which, u32 set)
308 {
309 sigset_t s;
310 u32 tmp[4];
311 switch (which) {
312 case 1: /* sigpending */
313 spin_lock_irq(¤t->sigmask_lock);
314 sigandsets(&s, ¤t->blocked, ¤t->pending.signal);
315 recalc_sigpending(current);
316 spin_unlock_irq(¤t->sigmask_lock);
317 break;
318 case 2: /* sigfillset - I just set signals which have linux equivalents */
319 sigfillset(&s);
320 break;
321 default: return -EINVAL;
322 }
323 if (mapout (&s, tmp)) return -EINVAL;
324 tmp[2] = 0; tmp[3] = 0;
325 if (copy_to_user ((u32 *)A(set), tmp, sizeof(tmp)))
326 return -EFAULT;
327 return 0;
328 }
329
330 asmlinkage int solaris_wait(u32 stat_loc)
331 {
332 int (*sys_wait4)(pid_t,unsigned int *, int, struct rusage *) =
333 (int (*)(pid_t,unsigned int *, int, struct rusage *))SYS(wait4);
334 int ret, status;
335
336 ret = sys_wait4(-1, (unsigned int *)A(stat_loc), WUNTRACED, NULL);
337 if (ret >= 0 && stat_loc) {
338 if (get_user (status, (unsigned int *)A(stat_loc)))
339 return -EFAULT;
340 if (((status - 1) & 0xffff) < 0xff)
341 status = linux_to_solaris_signals[status & 0x7f] & 0x7f;
342 else if ((status & 0xff) == 0x7f)
343 status = (linux_to_solaris_signals[(status >> 8) & 0xff] << 8) | 0x7f;
344 if (__put_user (status, (unsigned int *)A(stat_loc)))
345 return -EFAULT;
346 }
347 return ret;
348 }
349
350 asmlinkage int solaris_waitid(int idtype, s32 pid, u32 info, int options)
351 {
352 int (*sys_wait4)(pid_t,unsigned int *, int, struct rusage *) =
353 (int (*)(pid_t,unsigned int *, int, struct rusage *))SYS(wait4);
354 int opts, status, ret;
355
356 switch (idtype) {
357 case 0: /* P_PID */ break;
358 case 1: /* P_PGID */ pid = -pid; break;
359 case 7: /* P_ALL */ pid = -1; break;
360 default: return -EINVAL;
361 }
362 opts = 0;
363 if (options & SOLARIS_WUNTRACED) opts |= WUNTRACED;
364 if (options & SOLARIS_WNOHANG) opts |= WNOHANG;
365 current->state = TASK_RUNNING;
366 ret = sys_wait4(pid, (unsigned int *)A(info), opts, NULL);
367 if (ret < 0) return ret;
368 if (info) {
369 struct sol_siginfo *s = (struct sol_siginfo *)A(info);
370
371 if (get_user (status, (unsigned int *)A(info)))
372 return -EFAULT;
373
374 if (__put_user (SOLARIS_SIGCLD, &s->si_signo) ||
375 __put_user (ret, &s->_data._proc._pid))
376 return -EFAULT;
377
378 switch (status & 0xff) {
379 case 0: ret = SOLARIS_CLD_EXITED;
380 status = (status >> 8) & 0xff;
381 break;
382 case 0x7f:
383 status = (status >> 8) & 0xff;
384 switch (status) {
385 case SIGSTOP:
386 case SIGTSTP: ret = SOLARIS_CLD_STOPPED;
387 default: ret = SOLARIS_CLD_EXITED;
388 }
389 status = linux_to_solaris_signals[status];
390 break;
391 default:
392 if (status & 0x80) ret = SOLARIS_CLD_DUMPED;
393 else ret = SOLARIS_CLD_KILLED;
394 status = linux_to_solaris_signals[status & 0x7f];
395 break;
396 }
397
398 if (__put_user (ret, &s->si_code) ||
399 __put_user (status, &s->_data._proc._pdata._cld._status))
400 return -EFAULT;
401 }
402 return 0;
403 }
404
405 extern int svr4_setcontext(svr4_ucontext_t *c, struct pt_regs *regs);
406 extern int svr4_getcontext(svr4_ucontext_t *c, struct pt_regs *regs);
407
408 asmlinkage int solaris_context(struct pt_regs *regs)
409 {
410 switch ((unsigned)regs->u_regs[UREG_I0]) {
411 case 0: /* getcontext */
412 return svr4_getcontext((svr4_ucontext_t *)(long)(u32)regs->u_regs[UREG_I1], regs);
413 case 1: /* setcontext */
414 return svr4_setcontext((svr4_ucontext_t *)(long)(u32)regs->u_regs[UREG_I1], regs);
415 default:
416 return -EINVAL;
417
418 }
419 }
420
421 asmlinkage int solaris_sigaltstack(u32 ss, u32 oss)
422 {
423 /* XXX Implement this soon */
424 return 0;
425 }
426