431 lines
11 KiB
C
431 lines
11 KiB
C
/* $Id: signal.c,v 1.7 2000/09/05 21:44:54 davem Exp $
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* signal.c: Signal emulation for Solaris
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*
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* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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*/
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#include <linux/types.h>
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#include <linux/smp_lock.h>
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#include <linux/errno.h>
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#include <asm/uaccess.h>
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#include <asm/svr4.h>
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#include <asm/string.h>
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#include "conv.h"
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#include "signal.h"
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#define _S(nr) (1L<<((nr)-1))
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#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
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long linux_to_solaris_signals[] = {
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0,
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SOLARIS_SIGHUP, SOLARIS_SIGINT,
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SOLARIS_SIGQUIT, SOLARIS_SIGILL,
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SOLARIS_SIGTRAP, SOLARIS_SIGIOT,
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SOLARIS_SIGEMT, SOLARIS_SIGFPE,
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SOLARIS_SIGKILL, SOLARIS_SIGBUS,
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SOLARIS_SIGSEGV, SOLARIS_SIGSYS,
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SOLARIS_SIGPIPE, SOLARIS_SIGALRM,
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SOLARIS_SIGTERM, SOLARIS_SIGURG,
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SOLARIS_SIGSTOP, SOLARIS_SIGTSTP,
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SOLARIS_SIGCONT, SOLARIS_SIGCLD,
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SOLARIS_SIGTTIN, SOLARIS_SIGTTOU,
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SOLARIS_SIGPOLL, SOLARIS_SIGXCPU,
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SOLARIS_SIGXFSZ, SOLARIS_SIGVTALRM,
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SOLARIS_SIGPROF, SOLARIS_SIGWINCH,
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SOLARIS_SIGUSR1, SOLARIS_SIGUSR1,
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SOLARIS_SIGUSR2, -1,
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};
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long solaris_to_linux_signals[] = {
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0,
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SIGHUP, SIGINT, SIGQUIT, SIGILL,
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SIGTRAP, SIGIOT, SIGEMT, SIGFPE,
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SIGKILL, SIGBUS, SIGSEGV, SIGSYS,
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SIGPIPE, SIGALRM, SIGTERM, SIGUSR1,
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SIGUSR2, SIGCHLD, -1, SIGWINCH,
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SIGURG, SIGPOLL, SIGSTOP, SIGTSTP,
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SIGCONT, SIGTTIN, SIGTTOU, SIGVTALRM,
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SIGPROF, SIGXCPU, SIGXFSZ, -1,
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-1, -1, -1, -1,
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-1, -1, -1, -1,
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-1, -1, -1, -1,
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};
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static inline long mapsig(long sig)
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{
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if ((unsigned long)sig > SOLARIS_NSIGNALS)
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return -EINVAL;
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return solaris_to_linux_signals[sig];
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}
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asmlinkage int solaris_kill(int pid, int sig)
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{
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int (*sys_kill)(int,int) =
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(int (*)(int,int))SYS(kill);
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int s = mapsig(sig);
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if (s < 0) return s;
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return sys_kill(pid, s);
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}
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static long sig_handler(int sig, u32 arg, int one_shot)
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{
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struct sigaction sa, old;
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int ret;
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mm_segment_t old_fs = get_fs();
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int (*sys_sigaction)(int,struct sigaction __user *,struct sigaction __user *) =
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(int (*)(int,struct sigaction __user *,struct sigaction __user *))SYS(sigaction);
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sigemptyset(&sa.sa_mask);
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sa.sa_restorer = NULL;
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sa.sa_handler = (__sighandler_t)A(arg);
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sa.sa_flags = 0;
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if (one_shot) sa.sa_flags = SA_ONESHOT | SA_NOMASK;
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set_fs (KERNEL_DS);
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ret = sys_sigaction(sig, (void __user *)&sa, (void __user *)&old);
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set_fs (old_fs);
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if (ret < 0) return ret;
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return (u32)(unsigned long)old.sa_handler;
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}
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static inline long solaris_signal(int sig, u32 arg)
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{
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return sig_handler (sig, arg, 1);
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}
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static long solaris_sigset(int sig, u32 arg)
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{
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if (arg != 2) /* HOLD */ {
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spin_lock_irq(¤t->sighand->siglock);
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sigdelsetmask(¤t->blocked, _S(sig));
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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return sig_handler (sig, arg, 0);
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} else {
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spin_lock_irq(¤t->sighand->siglock);
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sigaddsetmask(¤t->blocked, (_S(sig) & ~_BLOCKABLE));
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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return 0;
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}
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}
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static inline long solaris_sighold(int sig)
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{
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return solaris_sigset(sig, 2);
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}
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static inline long solaris_sigrelse(int sig)
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{
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spin_lock_irq(¤t->sighand->siglock);
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sigdelsetmask(¤t->blocked, _S(sig));
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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return 0;
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}
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static inline long solaris_sigignore(int sig)
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{
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return sig_handler(sig, (u32)(unsigned long)SIG_IGN, 0);
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}
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static inline long solaris_sigpause(int sig)
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{
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printk ("Need to support solaris sigpause\n");
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return -ENOSYS;
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}
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asmlinkage long solaris_sigfunc(int sig, u32 arg)
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{
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int func = sig & ~0xff;
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sig = mapsig(sig & 0xff);
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if (sig < 0) return sig;
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switch (func) {
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case 0: return solaris_signal(sig, arg);
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case 0x100: return solaris_sigset(sig, arg);
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case 0x200: return solaris_sighold(sig);
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case 0x400: return solaris_sigrelse(sig);
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case 0x800: return solaris_sigignore(sig);
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case 0x1000: return solaris_sigpause(sig);
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}
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return -EINVAL;
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}
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typedef struct {
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u32 __sigbits[4];
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} sol_sigset_t;
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static inline int mapin(u32 *p, sigset_t *q)
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{
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int i;
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u32 x;
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int sig;
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sigemptyset(q);
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x = p[0];
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for (i = 1; i <= SOLARIS_NSIGNALS; i++) {
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if (x & 1) {
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sig = solaris_to_linux_signals[i];
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if (sig == -1)
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return -EINVAL;
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sigaddsetmask(q, (1L << (sig - 1)));
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}
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x >>= 1;
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if (i == 32)
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x = p[1];
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}
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return 0;
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}
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static inline int mapout(sigset_t *q, u32 *p)
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{
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int i;
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int sig;
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p[0] = 0;
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p[1] = 0;
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for (i = 1; i <= 32; i++) {
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if (sigismember(q, sigmask(i))) {
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sig = linux_to_solaris_signals[i];
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if (sig == -1)
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return -EINVAL;
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if (sig > 32)
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p[1] |= 1L << (sig - 33);
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else
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p[0] |= 1L << (sig - 1);
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}
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}
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return 0;
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}
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asmlinkage int solaris_sigprocmask(int how, u32 in, u32 out)
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{
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sigset_t in_s, *ins, out_s, *outs;
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mm_segment_t old_fs = get_fs();
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int ret;
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int (*sys_sigprocmask)(int,sigset_t __user *,sigset_t __user *) =
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(int (*)(int,sigset_t __user *,sigset_t __user *))SYS(sigprocmask);
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ins = NULL; outs = NULL;
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if (in) {
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u32 tmp[2];
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if (copy_from_user (tmp, (void __user *)A(in), 2*sizeof(u32)))
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return -EFAULT;
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ins = &in_s;
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if (mapin (tmp, ins)) return -EINVAL;
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}
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if (out) outs = &out_s;
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set_fs (KERNEL_DS);
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ret = sys_sigprocmask((how == 3) ? SIG_SETMASK : how,
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(void __user *)ins, (void __user *)outs);
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set_fs (old_fs);
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if (ret) return ret;
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if (out) {
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u32 tmp[4];
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tmp[2] = 0; tmp[3] = 0;
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if (mapout (outs, tmp)) return -EINVAL;
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if (copy_to_user((void __user *)A(out), tmp, 4*sizeof(u32)))
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return -EFAULT;
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}
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return 0;
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}
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asmlinkage long do_sol_sigsuspend(u32 mask)
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{
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sigset_t s;
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u32 tmp[2];
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if (copy_from_user (tmp, (sol_sigset_t __user *)A(mask), 2*sizeof(u32)))
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return -EFAULT;
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if (mapin (tmp, &s)) return -EINVAL;
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return (long)s.sig[0];
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}
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struct sol_sigaction {
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int sa_flags;
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u32 sa_handler;
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u32 sa_mask[4];
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int sa_resv[2];
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};
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asmlinkage int solaris_sigaction(int sig, u32 act, u32 old)
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{
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u32 tmp, tmp2[4];
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struct sigaction s, s2;
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int ret;
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mm_segment_t old_fs = get_fs();
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struct sol_sigaction __user *p = (void __user *)A(old);
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int (*sys_sigaction)(int,struct sigaction __user *,struct sigaction __user *) =
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(int (*)(int,struct sigaction __user *,struct sigaction __user *))SYS(sigaction);
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sig = mapsig(sig);
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if (sig < 0) {
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/* We cheat a little bit for Solaris only signals */
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if (old && clear_user(p, sizeof(struct sol_sigaction)))
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return -EFAULT;
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return 0;
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}
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if (act) {
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if (get_user (tmp, &p->sa_flags))
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return -EFAULT;
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s.sa_flags = 0;
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if (tmp & SOLARIS_SA_ONSTACK) s.sa_flags |= SA_STACK;
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if (tmp & SOLARIS_SA_RESTART) s.sa_flags |= SA_RESTART;
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if (tmp & SOLARIS_SA_NODEFER) s.sa_flags |= SA_NOMASK;
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if (tmp & SOLARIS_SA_RESETHAND) s.sa_flags |= SA_ONESHOT;
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if (tmp & SOLARIS_SA_NOCLDSTOP) s.sa_flags |= SA_NOCLDSTOP;
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if (get_user (tmp, &p->sa_handler) ||
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copy_from_user (tmp2, &p->sa_mask, 2*sizeof(u32)))
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return -EFAULT;
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s.sa_handler = (__sighandler_t)A(tmp);
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if (mapin (tmp2, &s.sa_mask)) return -EINVAL;
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s.sa_restorer = NULL;
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}
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set_fs(KERNEL_DS);
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ret = sys_sigaction(sig, act ? (void __user *)&s : NULL,
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old ? (void __user *)&s2 : NULL);
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set_fs(old_fs);
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if (ret) return ret;
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if (old) {
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if (mapout (&s2.sa_mask, tmp2)) return -EINVAL;
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tmp = 0; tmp2[2] = 0; tmp2[3] = 0;
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if (s2.sa_flags & SA_STACK) tmp |= SOLARIS_SA_ONSTACK;
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if (s2.sa_flags & SA_RESTART) tmp |= SOLARIS_SA_RESTART;
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if (s2.sa_flags & SA_NOMASK) tmp |= SOLARIS_SA_NODEFER;
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if (s2.sa_flags & SA_ONESHOT) tmp |= SOLARIS_SA_RESETHAND;
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if (s2.sa_flags & SA_NOCLDSTOP) tmp |= SOLARIS_SA_NOCLDSTOP;
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if (put_user (tmp, &p->sa_flags) ||
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__put_user ((u32)(unsigned long)s2.sa_handler, &p->sa_handler) ||
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copy_to_user (&p->sa_mask, tmp2, 4*sizeof(u32)))
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return -EFAULT;
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}
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return 0;
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}
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asmlinkage int solaris_sigpending(int which, u32 set)
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{
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sigset_t s;
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u32 tmp[4];
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switch (which) {
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case 1: /* sigpending */
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spin_lock_irq(¤t->sighand->siglock);
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sigandsets(&s, ¤t->blocked, ¤t->pending.signal);
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recalc_sigpending();
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spin_unlock_irq(¤t->sighand->siglock);
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break;
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case 2: /* sigfillset - I just set signals which have linux equivalents */
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sigfillset(&s);
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break;
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default: return -EINVAL;
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}
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if (mapout (&s, tmp)) return -EINVAL;
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tmp[2] = 0; tmp[3] = 0;
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if (copy_to_user ((u32 __user *)A(set), tmp, sizeof(tmp)))
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return -EFAULT;
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return 0;
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}
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asmlinkage int solaris_wait(u32 stat_loc)
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{
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unsigned __user *p = (unsigned __user *)A(stat_loc);
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int (*sys_wait4)(pid_t,unsigned __user *, int, struct rusage __user *) =
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(int (*)(pid_t,unsigned __user *, int, struct rusage __user *))SYS(wait4);
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int ret, status;
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ret = sys_wait4(-1, p, WUNTRACED, NULL);
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if (ret >= 0 && stat_loc) {
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if (get_user (status, p))
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return -EFAULT;
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if (((status - 1) & 0xffff) < 0xff)
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status = linux_to_solaris_signals[status & 0x7f] & 0x7f;
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else if ((status & 0xff) == 0x7f)
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status = (linux_to_solaris_signals[(status >> 8) & 0xff] << 8) | 0x7f;
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if (__put_user (status, p))
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return -EFAULT;
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}
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return ret;
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}
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asmlinkage int solaris_waitid(int idtype, s32 pid, u32 info, int options)
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{
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int (*sys_wait4)(pid_t,unsigned __user *, int, struct rusage __user *) =
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(int (*)(pid_t,unsigned __user *, int, struct rusage __user *))SYS(wait4);
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int opts, status, ret;
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switch (idtype) {
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case 0: /* P_PID */ break;
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case 1: /* P_PGID */ pid = -pid; break;
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case 7: /* P_ALL */ pid = -1; break;
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default: return -EINVAL;
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}
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opts = 0;
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if (options & SOLARIS_WUNTRACED) opts |= WUNTRACED;
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if (options & SOLARIS_WNOHANG) opts |= WNOHANG;
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current->state = TASK_RUNNING;
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ret = sys_wait4(pid, (unsigned int __user *)A(info), opts, NULL);
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if (ret < 0) return ret;
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if (info) {
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struct sol_siginfo __user *s = (void __user *)A(info);
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if (get_user (status, (unsigned int __user *)A(info)))
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return -EFAULT;
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if (__put_user (SOLARIS_SIGCLD, &s->si_signo) ||
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__put_user (ret, &s->_data._proc._pid))
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return -EFAULT;
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switch (status & 0xff) {
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case 0: ret = SOLARIS_CLD_EXITED;
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status = (status >> 8) & 0xff;
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break;
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case 0x7f:
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status = (status >> 8) & 0xff;
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switch (status) {
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case SIGSTOP:
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case SIGTSTP: ret = SOLARIS_CLD_STOPPED;
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default: ret = SOLARIS_CLD_EXITED;
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}
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status = linux_to_solaris_signals[status];
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break;
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default:
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if (status & 0x80) ret = SOLARIS_CLD_DUMPED;
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else ret = SOLARIS_CLD_KILLED;
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status = linux_to_solaris_signals[status & 0x7f];
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break;
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}
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if (__put_user (ret, &s->si_code) ||
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__put_user (status, &s->_data._proc._pdata._cld._status))
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return -EFAULT;
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}
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return 0;
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}
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extern int svr4_setcontext(svr4_ucontext_t *c, struct pt_regs *regs);
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extern int svr4_getcontext(svr4_ucontext_t *c, struct pt_regs *regs);
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asmlinkage int solaris_context(struct pt_regs *regs)
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{
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switch ((unsigned)regs->u_regs[UREG_I0]) {
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case 0: /* getcontext */
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return svr4_getcontext((svr4_ucontext_t *)(long)(u32)regs->u_regs[UREG_I1], regs);
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case 1: /* setcontext */
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return svr4_setcontext((svr4_ucontext_t *)(long)(u32)regs->u_regs[UREG_I1], regs);
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default:
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return -EINVAL;
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}
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}
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asmlinkage int solaris_sigaltstack(u32 ss, u32 oss)
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{
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/* XXX Implement this soon */
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return 0;
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}
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