release/src-rt-6.x/linux/linux-2.6/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/errno.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 __user *,struct sigaction __user *) =
  79                 (int (*)(int,struct sigaction __user *,struct sigaction __user *))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, (void __user *)&sa, (void __user *)&old);
  88         set_fs (old_fs);
  89         if (ret < 0) return ret;
  90         return (u32)(unsigned 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(&current->sighand->siglock);
 102                 sigdelsetmask(&current->blocked, _S(sig));
 103                 recalc_sigpending();
 104                 spin_unlock_irq(&current->sighand->siglock);
 105                 return sig_handler (sig, arg, 0);
 106         } else {
 107                 spin_lock_irq(&current->sighand->siglock);
 108                 sigaddsetmask(&current->blocked, (_S(sig) & ~_BLOCKABLE));
 109                 recalc_sigpending();
 110                 spin_unlock_irq(&current->sighand->siglock);
 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(&current->sighand->siglock);
 123         sigdelsetmask(&current->blocked, _S(sig));
 124         recalc_sigpending();
 125         spin_unlock_irq(&current->sighand->siglock);
 126         return 0;
 127 }
 128
 129 static inline long solaris_sigignore(int sig)
 130 {
 131         return sig_handler(sig, (u32)(unsigned long)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 __user *,sigset_t __user *) =
 210                 (int (*)(int,sigset_t __user *,sigset_t __user *))SYS(sigprocmask);
 211
 212         ins = NULL; outs = NULL;
 213         if (in) {
 214                 u32 tmp[2];
 215
 216                 if (copy_from_user (tmp, (void __user *)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,
 224                                 (void __user *)ins, (void __user *)outs);
 225         set_fs (old_fs);
 226         if (ret) return ret;
 227         if (out) {
 228                 u32 tmp[4];
 229
 230                 tmp[2] = 0; tmp[3] = 0;
 231                 if (mapout (outs, tmp)) return -EINVAL;
 232                 if (copy_to_user((void __user *)A(out), tmp, 4*sizeof(u32)))
 233                         return -EFAULT;
 234         }
 235         return 0;
 236 }
 237
 238 asmlinkage long do_sol_sigsuspend(u32 mask)
 239 {
 240         sigset_t s;
 241         u32 tmp[2];
 242
 243         if (copy_from_user (tmp, (sol_sigset_t __user *)A(mask), 2*sizeof(u32)))
 244                 return -EFAULT;
 245         if (mapin (tmp, &s)) return -EINVAL;
 246         return (long)s.sig[0];
 247 }
 248
 249 struct sol_sigaction {
 250         int     sa_flags;
 251         u32     sa_handler;
 252         u32     sa_mask[4];
 253         int     sa_resv[2];
 254 };
 255
 256 asmlinkage int solaris_sigaction(int sig, u32 act, u32 old)
 257 {
 258         u32 tmp, tmp2[4];
 259         struct sigaction s, s2;
 260         int ret;
 261         mm_segment_t old_fs = get_fs();
 262         struct sol_sigaction __user *p = (void __user *)A(old);
 263         int (*sys_sigaction)(int,struct sigaction __user *,struct sigaction __user *) =
 264                 (int (*)(int,struct sigaction __user *,struct sigaction __user *))SYS(sigaction);
 265
 266         sig = mapsig(sig);
 267         if (sig < 0) {
 268                 /* We cheat a little bit for Solaris only signals */
 269                 if (old && clear_user(p, sizeof(struct sol_sigaction)))
 270                         return -EFAULT;
 271                 return 0;
 272         }
 273         if (act) {
 274                 if (get_user (tmp, &p->sa_flags))
 275                         return -EFAULT;
 276                 s.sa_flags = 0;
 277                 if (tmp & SOLARIS_SA_ONSTACK) s.sa_flags |= SA_STACK;
 278                 if (tmp & SOLARIS_SA_RESTART) s.sa_flags |= SA_RESTART;
 279                 if (tmp & SOLARIS_SA_NODEFER) s.sa_flags |= SA_NOMASK;
 280                 if (tmp & SOLARIS_SA_RESETHAND) s.sa_flags |= SA_ONESHOT;
 281                 if (tmp & SOLARIS_SA_NOCLDSTOP) s.sa_flags |= SA_NOCLDSTOP;
 282                 if (get_user (tmp, &p->sa_handler) ||
 283                     copy_from_user (tmp2, &p->sa_mask, 2*sizeof(u32)))
 284                         return -EFAULT;
 285                 s.sa_handler = (__sighandler_t)A(tmp);
 286                 if (mapin (tmp2, &s.sa_mask)) return -EINVAL;
 287                 s.sa_restorer = NULL;
 288         }
 289         set_fs(KERNEL_DS);
 290         ret = sys_sigaction(sig, act ? (void __user *)&s : NULL,
 291                                  old ? (void __user *)&s2 : NULL);
 292         set_fs(old_fs);
 293         if (ret) return ret;
 294         if (old) {
 295                 if (mapout (&s2.sa_mask, tmp2)) return -EINVAL;
 296                 tmp = 0; tmp2[2] = 0; tmp2[3] = 0;
 297                 if (s2.sa_flags & SA_STACK) tmp |= SOLARIS_SA_ONSTACK;
 298                 if (s2.sa_flags & SA_RESTART) tmp |= SOLARIS_SA_RESTART;
 299                 if (s2.sa_flags & SA_NOMASK) tmp |= SOLARIS_SA_NODEFER;
 300                 if (s2.sa_flags & SA_ONESHOT) tmp |= SOLARIS_SA_RESETHAND;
 301                 if (s2.sa_flags & SA_NOCLDSTOP) tmp |= SOLARIS_SA_NOCLDSTOP;
 302                 if (put_user (tmp, &p->sa_flags) ||
 303                     __put_user ((u32)(unsigned long)s2.sa_handler, &p->sa_handler) ||
 304                     copy_to_user (&p->sa_mask, tmp2, 4*sizeof(u32)))
 305                         return -EFAULT;
 306         }
 307         return 0;
 308 }
 309
 310 asmlinkage int solaris_sigpending(int which, u32 set)
 311 {
 312         sigset_t s;
 313         u32 tmp[4];
 314         switch (which) {
 315         case 1: /* sigpending */
 316                 spin_lock_irq(&current->sighand->siglock);
 317                 sigandsets(&s, &current->blocked, &current->pending.signal);
 318                 recalc_sigpending();
 319                 spin_unlock_irq(&current->sighand->siglock);
 320                 break;
 321         case 2: /* sigfillset - I just set signals which have linux equivalents */
 322                 sigfillset(&s);
 323                 break;
 324         default: return -EINVAL;
 325         }
 326         if (mapout (&s, tmp)) return -EINVAL;
 327         tmp[2] = 0; tmp[3] = 0;
 328         if (copy_to_user ((u32 __user *)A(set), tmp, sizeof(tmp)))
 329                 return -EFAULT;
 330         return 0;
 331 }
 332
 333 asmlinkage int solaris_wait(u32 stat_loc)
 334 {
 335         unsigned __user *p = (unsigned __user *)A(stat_loc);
 336         int (*sys_wait4)(pid_t,unsigned __user *, int, struct rusage __user *) =
 337                 (int (*)(pid_t,unsigned __user *, int, struct rusage __user *))SYS(wait4);
 338         int ret, status;
 339
 340         ret = sys_wait4(-1, p, WUNTRACED, NULL);
 341         if (ret >= 0 && stat_loc) {
 342                 if (get_user (status, p))
 343                         return -EFAULT;
 344                 if (((status - 1) & 0xffff) < 0xff)
 345                         status = linux_to_solaris_signals[status & 0x7f] & 0x7f;
 346                 else if ((status & 0xff) == 0x7f)
 347                         status = (linux_to_solaris_signals[(status >> 8) & 0xff] << 8) | 0x7f;
 348                 if (__put_user (status, p))
 349                         return -EFAULT;
 350         }
 351         return ret;
 352 }
 353
 354 asmlinkage int solaris_waitid(int idtype, s32 pid, u32 info, int options)
 355 {
 356         int (*sys_wait4)(pid_t,unsigned __user *, int, struct rusage __user *) =
 357                 (int (*)(pid_t,unsigned __user *, int, struct rusage __user *))SYS(wait4);
 358         int opts, status, ret;
 359
 360         switch (idtype) {
 361         case 0: /* P_PID */ break;
 362         case 1: /* P_PGID */ pid = -pid; break;
 363         case 7: /* P_ALL */ pid = -1; break;
 364         default: return -EINVAL;
 365         }
 366         opts = 0;
 367         if (options & SOLARIS_WUNTRACED) opts |= WUNTRACED;
 368         if (options & SOLARIS_WNOHANG) opts |= WNOHANG;
 369         current->state = TASK_RUNNING;
 370         ret = sys_wait4(pid, (unsigned int __user *)A(info), opts, NULL);
 371         if (ret < 0) return ret;
 372         if (info) {
 373                 struct sol_siginfo __user *s = (void __user *)A(info);
 374
 375                 if (get_user (status, (unsigned int __user *)A(info)))
 376                         return -EFAULT;
 377
 378                 if (__put_user (SOLARIS_SIGCLD, &s->si_signo) ||
 379                     __put_user (ret, &s->_data._proc._pid))
 380                         return -EFAULT;
 381
 382                 switch (status & 0xff) {
 383                 case 0: ret = SOLARIS_CLD_EXITED;
 384                         status = (status >> 8) & 0xff;
 385                         break;
 386                 case 0x7f:
 387                         status = (status >> 8) & 0xff;
 388                         switch (status) {
 389                         case SIGSTOP:
 390                         case SIGTSTP: ret = SOLARIS_CLD_STOPPED;
 391                         default: ret = SOLARIS_CLD_EXITED;
 392                         }
 393                         status = linux_to_solaris_signals[status];
 394                         break;
 395                 default:
 396                         if (status & 0x80) ret = SOLARIS_CLD_DUMPED;
 397                         else ret = SOLARIS_CLD_KILLED;
 398                         status = linux_to_solaris_signals[status & 0x7f];
 399                         break;
 400                 }
 401
 402                 if (__put_user (ret, &s->si_code) ||
 403                     __put_user (status, &s->_data._proc._pdata._cld._status))
 404                         return -EFAULT;
 405         }
 406         return 0;
 407 }
 408
 409 extern int svr4_setcontext(svr4_ucontext_t *c, struct pt_regs *regs);
 410 extern int svr4_getcontext(svr4_ucontext_t *c, struct pt_regs *regs);
 411
 412 asmlinkage int solaris_context(struct pt_regs *regs)
 413 {
 414         switch ((unsigned)regs->u_regs[UREG_I0]) {
 415         case 0: /* getcontext */
 416                 return svr4_getcontext((svr4_ucontext_t *)(long)(u32)regs->u_regs[UREG_I1], regs);
 417         case 1: /* setcontext */
 418                 return svr4_setcontext((svr4_ucontext_t *)(long)(u32)regs->u_regs[UREG_I1], regs);
 419         default:
 420                 return -EINVAL;
 421
 422         }
 423 }
 424
 425 asmlinkage int solaris_sigaltstack(u32 ss, u32 oss)
 426 {
 427 /* XXX Implement this soon */
 428         return 0;
 429 }