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/*
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* Emulation of Linux signals
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <stdarg.h> |
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#include <unistd.h> |
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#include <signal.h> |
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#include <errno.h> |
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#include <sys/ucontext.h> |
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#include "qemu.h" |
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//#define DEBUG_SIGNAL
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#define MAX_SIGQUEUE_SIZE 1024 |
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struct sigqueue {
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struct sigqueue *next;
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target_siginfo_t info; |
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}; |
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struct emulated_sigaction {
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struct target_sigaction sa;
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int pending; /* true if signal is pending */ |
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struct sigqueue *first;
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struct sigqueue info; /* in order to always have memory for the |
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first signal, we put it here */
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}; |
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static struct emulated_sigaction sigact_table[TARGET_NSIG]; |
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static struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */ |
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static struct sigqueue *first_free; /* first free siginfo queue entry */ |
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static int signal_pending; /* non zero if a signal may be pending */ |
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static void host_signal_handler(int host_signum, siginfo_t *info, |
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void *puc);
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static uint8_t host_to_target_signal_table[65] = { |
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[SIGHUP] = TARGET_SIGHUP, |
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[SIGINT] = TARGET_SIGINT, |
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[SIGQUIT] = TARGET_SIGQUIT, |
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[SIGILL] = TARGET_SIGILL, |
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[SIGTRAP] = TARGET_SIGTRAP, |
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[SIGABRT] = TARGET_SIGABRT, |
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/* [SIGIOT] = TARGET_SIGIOT,*/
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[SIGBUS] = TARGET_SIGBUS, |
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[SIGFPE] = TARGET_SIGFPE, |
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[SIGKILL] = TARGET_SIGKILL, |
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[SIGUSR1] = TARGET_SIGUSR1, |
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[SIGSEGV] = TARGET_SIGSEGV, |
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[SIGUSR2] = TARGET_SIGUSR2, |
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[SIGPIPE] = TARGET_SIGPIPE, |
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[SIGALRM] = TARGET_SIGALRM, |
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[SIGTERM] = TARGET_SIGTERM, |
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#ifdef SIGSTKFLT
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[SIGSTKFLT] = TARGET_SIGSTKFLT, |
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#endif
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[SIGCHLD] = TARGET_SIGCHLD, |
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[SIGCONT] = TARGET_SIGCONT, |
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[SIGSTOP] = TARGET_SIGSTOP, |
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[SIGTSTP] = TARGET_SIGTSTP, |
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[SIGTTIN] = TARGET_SIGTTIN, |
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[SIGTTOU] = TARGET_SIGTTOU, |
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[SIGURG] = TARGET_SIGURG, |
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[SIGXCPU] = TARGET_SIGXCPU, |
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[SIGXFSZ] = TARGET_SIGXFSZ, |
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[SIGVTALRM] = TARGET_SIGVTALRM, |
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[SIGPROF] = TARGET_SIGPROF, |
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[SIGWINCH] = TARGET_SIGWINCH, |
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[SIGIO] = TARGET_SIGIO, |
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[SIGPWR] = TARGET_SIGPWR, |
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[SIGSYS] = TARGET_SIGSYS, |
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/* next signals stay the same */
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}; |
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static uint8_t target_to_host_signal_table[65]; |
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static inline int host_to_target_signal(int sig) |
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{ |
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return host_to_target_signal_table[sig];
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} |
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static inline int target_to_host_signal(int sig) |
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{ |
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return target_to_host_signal_table[sig];
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} |
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static void host_to_target_sigset_internal(target_sigset_t *d, |
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const sigset_t *s)
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{ |
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int i;
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unsigned long sigmask; |
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uint32_t target_sigmask; |
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sigmask = ((unsigned long *)s)[0]; |
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target_sigmask = 0;
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for(i = 0; i < 32; i++) { |
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if (sigmask & (1 << i)) |
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target_sigmask |= 1 << (host_to_target_signal(i + 1) - 1); |
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} |
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#if TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 32 |
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d->sig[0] = target_sigmask;
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for(i = 1;i < TARGET_NSIG_WORDS; i++) { |
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d->sig[i] = ((unsigned long *)s)[i]; |
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} |
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#elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2 |
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d->sig[0] = target_sigmask;
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d->sig[1] = sigmask >> 32; |
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#else
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#warning host_to_target_sigset
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#endif
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} |
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void host_to_target_sigset(target_sigset_t *d, const sigset_t *s) |
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{ |
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target_sigset_t d1; |
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int i;
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host_to_target_sigset_internal(&d1, s); |
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for(i = 0;i < TARGET_NSIG_WORDS; i++) |
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d->sig[i] = tswapl(d1.sig[i]); |
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} |
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void target_to_host_sigset_internal(sigset_t *d, const target_sigset_t *s) |
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{ |
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int i;
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unsigned long sigmask; |
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target_ulong target_sigmask; |
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target_sigmask = s->sig[0];
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sigmask = 0;
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for(i = 0; i < 32; i++) { |
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if (target_sigmask & (1 << i)) |
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sigmask |= 1 << (target_to_host_signal(i + 1) - 1); |
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} |
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#if TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 32 |
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((unsigned long *)d)[0] = sigmask; |
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for(i = 1;i < TARGET_NSIG_WORDS; i++) { |
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((unsigned long *)d)[i] = s->sig[i]; |
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} |
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#elif TARGET_LONG_BITS == 32 && HOST_LONG_BITS == 64 && TARGET_NSIG_WORDS == 2 |
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((unsigned long *)d)[0] = sigmask | ((unsigned long)(s->sig[1]) << 32); |
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#else
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#warning target_to_host_sigset
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#endif /* TARGET_LONG_BITS */ |
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} |
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void target_to_host_sigset(sigset_t *d, const target_sigset_t *s) |
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{ |
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target_sigset_t s1; |
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int i;
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for(i = 0;i < TARGET_NSIG_WORDS; i++) |
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s1.sig[i] = tswapl(s->sig[i]); |
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target_to_host_sigset_internal(d, &s1); |
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} |
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void host_to_target_old_sigset(target_ulong *old_sigset,
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const sigset_t *sigset)
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{ |
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target_sigset_t d; |
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host_to_target_sigset(&d, sigset); |
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*old_sigset = d.sig[0];
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} |
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void target_to_host_old_sigset(sigset_t *sigset,
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const target_ulong *old_sigset)
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{ |
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target_sigset_t d; |
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int i;
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d.sig[0] = *old_sigset;
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for(i = 1;i < TARGET_NSIG_WORDS; i++) |
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d.sig[i] = 0;
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target_to_host_sigset(sigset, &d); |
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} |
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/* siginfo conversion */
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static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, |
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const siginfo_t *info)
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{ |
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int sig;
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sig = host_to_target_signal(info->si_signo); |
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tinfo->si_signo = sig; |
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tinfo->si_errno = 0;
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tinfo->si_code = 0;
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if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
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sig == SIGBUS || sig == SIGTRAP) { |
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/* should never come here, but who knows. The information for
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the target is irrelevant */
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tinfo->_sifields._sigfault._addr = 0;
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} else if (sig >= TARGET_SIGRTMIN) { |
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tinfo->_sifields._rt._pid = info->si_pid; |
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tinfo->_sifields._rt._uid = info->si_uid; |
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/* XXX: potential problem if 64 bit */
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tinfo->_sifields._rt._sigval.sival_ptr = |
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(target_ulong)info->si_value.sival_ptr; |
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} |
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} |
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static void tswap_siginfo(target_siginfo_t *tinfo, |
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const target_siginfo_t *info)
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{ |
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int sig;
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sig = info->si_signo; |
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tinfo->si_signo = tswap32(sig); |
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tinfo->si_errno = tswap32(info->si_errno); |
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tinfo->si_code = tswap32(info->si_code); |
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if (sig == SIGILL || sig == SIGFPE || sig == SIGSEGV ||
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sig == SIGBUS || sig == SIGTRAP) { |
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tinfo->_sifields._sigfault._addr = |
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tswapl(info->_sifields._sigfault._addr); |
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} else if (sig >= TARGET_SIGRTMIN) { |
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tinfo->_sifields._rt._pid = tswap32(info->_sifields._rt._pid); |
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tinfo->_sifields._rt._uid = tswap32(info->_sifields._rt._uid); |
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tinfo->_sifields._rt._sigval.sival_ptr = |
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tswapl(info->_sifields._rt._sigval.sival_ptr); |
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} |
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} |
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void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info) |
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{ |
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host_to_target_siginfo_noswap(tinfo, info); |
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tswap_siginfo(tinfo, tinfo); |
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} |
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/* XXX: we support only POSIX RT signals are used. */
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/* XXX: find a solution for 64 bit (additionnal malloced data is needed) */
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void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo) |
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{ |
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info->si_signo = tswap32(tinfo->si_signo); |
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info->si_errno = tswap32(tinfo->si_errno); |
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info->si_code = tswap32(tinfo->si_code); |
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info->si_pid = tswap32(tinfo->_sifields._rt._pid); |
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info->si_uid = tswap32(tinfo->_sifields._rt._uid); |
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info->si_value.sival_ptr = |
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(void *)tswapl(tinfo->_sifields._rt._sigval.sival_ptr);
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} |
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void signal_init(void) |
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{ |
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struct sigaction act;
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int i, j;
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/* generate signal conversion tables */
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for(i = 1; i <= 64; i++) { |
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if (host_to_target_signal_table[i] == 0) |
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host_to_target_signal_table[i] = i; |
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} |
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for(i = 1; i <= 64; i++) { |
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j = host_to_target_signal_table[i]; |
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target_to_host_signal_table[j] = i; |
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} |
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/* set all host signal handlers. ALL signals are blocked during
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the handlers to serialize them. */
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sigfillset(&act.sa_mask); |
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act.sa_flags = SA_SIGINFO; |
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act.sa_sigaction = host_signal_handler; |
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for(i = 1; i < NSIG; i++) { |
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sigaction(i, &act, NULL);
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} |
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memset(sigact_table, 0, sizeof(sigact_table)); |
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first_free = &sigqueue_table[0];
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for(i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) |
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sigqueue_table[i].next = &sigqueue_table[i + 1];
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sigqueue_table[MAX_SIGQUEUE_SIZE - 1].next = NULL; |
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} |
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/* signal queue handling */
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static inline struct sigqueue *alloc_sigqueue(void) |
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{ |
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struct sigqueue *q = first_free;
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if (!q)
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return NULL; |
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first_free = q->next; |
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return q;
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} |
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static inline void free_sigqueue(struct sigqueue *q) |
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{ |
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q->next = first_free; |
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first_free = q; |
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} |
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/* abort execution with signal */
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void __attribute((noreturn)) force_sig(int sig) |
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{ |
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int host_sig;
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host_sig = target_to_host_signal(sig); |
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fprintf(stderr, "qemu: uncaught target signal %d (%s) - exiting\n",
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sig, strsignal(host_sig)); |
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#if 1 |
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_exit(-host_sig); |
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#else
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{ |
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struct sigaction act;
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sigemptyset(&act.sa_mask); |
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act.sa_flags = SA_SIGINFO; |
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act.sa_sigaction = SIG_DFL; |
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sigaction(SIGABRT, &act, NULL);
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abort(); |
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} |
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#endif
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} |
328 |
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/* queue a signal so that it will be send to the virtual CPU as soon
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as possible */
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int queue_signal(int sig, target_siginfo_t *info) |
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{ |
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struct emulated_sigaction *k;
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struct sigqueue *q, **pq;
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target_ulong handler; |
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#if defined(DEBUG_SIGNAL)
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fprintf(stderr, "queue_signal: sig=%d\n",
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sig); |
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#endif
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k = &sigact_table[sig - 1];
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handler = k->sa._sa_handler; |
343 |
if (handler == TARGET_SIG_DFL) {
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/* default handler : ignore some signal. The other are fatal */
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if (sig != TARGET_SIGCHLD &&
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sig != TARGET_SIGURG && |
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sig != TARGET_SIGWINCH) { |
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force_sig(sig); |
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} else {
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return 0; /* indicate ignored */ |
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} |
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} else if (handler == TARGET_SIG_IGN) { |
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/* ignore signal */
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return 0; |
355 |
} else if (handler == TARGET_SIG_ERR) { |
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force_sig(sig); |
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} else {
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pq = &k->first; |
359 |
if (sig < TARGET_SIGRTMIN) {
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/* if non real time signal, we queue exactly one signal */
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if (!k->pending)
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q = &k->info; |
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else
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return 0; |
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} else {
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if (!k->pending) {
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/* first signal */
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q = &k->info; |
369 |
} else {
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q = alloc_sigqueue(); |
371 |
if (!q)
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return -EAGAIN;
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while (*pq != NULL) |
374 |
pq = &(*pq)->next; |
375 |
} |
376 |
} |
377 |
*pq = q; |
378 |
q->info = *info; |
379 |
q->next = NULL;
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k->pending = 1;
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/* signal that a new signal is pending */
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signal_pending = 1;
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return 1; /* indicates that the signal was queued */ |
384 |
} |
385 |
} |
386 |
|
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static void host_signal_handler(int host_signum, siginfo_t *info, |
388 |
void *puc)
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{ |
390 |
int sig;
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target_siginfo_t tinfo; |
392 |
|
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/* the CPU emulator uses some host signals to detect exceptions,
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we we forward to it some signals */
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if (host_signum == SIGSEGV || host_signum == SIGBUS
|
396 |
#if defined(TARGET_I386) && defined(USE_CODE_COPY)
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|| host_signum == SIGFPE |
398 |
#endif
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) { |
400 |
if (cpu_signal_handler(host_signum, info, puc))
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401 |
return;
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402 |
} |
403 |
|
404 |
/* get target signal number */
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sig = host_to_target_signal(host_signum); |
406 |
if (sig < 1 || sig > TARGET_NSIG) |
407 |
return;
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408 |
#if defined(DEBUG_SIGNAL)
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409 |
fprintf(stderr, "qemu: got signal %d\n", sig);
|
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#endif
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host_to_target_siginfo_noswap(&tinfo, info); |
412 |
if (queue_signal(sig, &tinfo) == 1) { |
413 |
/* interrupt the virtual CPU as soon as possible */
|
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cpu_interrupt(global_env, CPU_INTERRUPT_EXIT); |
415 |
} |
416 |
} |
417 |
|
418 |
int do_sigaction(int sig, const struct target_sigaction *act, |
419 |
struct target_sigaction *oact)
|
420 |
{ |
421 |
struct emulated_sigaction *k;
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422 |
struct sigaction act1;
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423 |
int host_sig;
|
424 |
|
425 |
if (sig < 1 || sig > TARGET_NSIG) |
426 |
return -EINVAL;
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427 |
k = &sigact_table[sig - 1];
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428 |
#if defined(DEBUG_SIGNAL)
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429 |
fprintf(stderr, "sigaction sig=%d act=0x%08x, oact=0x%08x\n",
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430 |
sig, (int)act, (int)oact); |
431 |
#endif
|
432 |
if (oact) {
|
433 |
oact->_sa_handler = tswapl(k->sa._sa_handler); |
434 |
oact->sa_flags = tswapl(k->sa.sa_flags); |
435 |
oact->sa_restorer = tswapl(k->sa.sa_restorer); |
436 |
oact->sa_mask = k->sa.sa_mask; |
437 |
} |
438 |
if (act) {
|
439 |
k->sa._sa_handler = tswapl(act->_sa_handler); |
440 |
k->sa.sa_flags = tswapl(act->sa_flags); |
441 |
k->sa.sa_restorer = tswapl(act->sa_restorer); |
442 |
k->sa.sa_mask = act->sa_mask; |
443 |
|
444 |
/* we update the host linux signal state */
|
445 |
host_sig = target_to_host_signal(sig); |
446 |
if (host_sig != SIGSEGV && host_sig != SIGBUS) {
|
447 |
sigfillset(&act1.sa_mask); |
448 |
act1.sa_flags = SA_SIGINFO; |
449 |
if (k->sa.sa_flags & TARGET_SA_RESTART)
|
450 |
act1.sa_flags |= SA_RESTART; |
451 |
/* NOTE: it is important to update the host kernel signal
|
452 |
ignore state to avoid getting unexpected interrupted
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453 |
syscalls */
|
454 |
if (k->sa._sa_handler == TARGET_SIG_IGN) {
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455 |
act1.sa_sigaction = (void *)SIG_IGN;
|
456 |
} else if (k->sa._sa_handler == TARGET_SIG_DFL) { |
457 |
act1.sa_sigaction = (void *)SIG_DFL;
|
458 |
} else {
|
459 |
act1.sa_sigaction = host_signal_handler; |
460 |
} |
461 |
sigaction(host_sig, &act1, NULL);
|
462 |
} |
463 |
} |
464 |
return 0; |
465 |
} |
466 |
|
467 |
#ifndef offsetof
|
468 |
#define offsetof(type, field) ((size_t) &((type *)0)->field) |
469 |
#endif
|
470 |
|
471 |
static inline int copy_siginfo_to_user(target_siginfo_t *tinfo, |
472 |
const target_siginfo_t *info)
|
473 |
{ |
474 |
tswap_siginfo(tinfo, info); |
475 |
return 0; |
476 |
} |
477 |
|
478 |
#ifdef TARGET_I386
|
479 |
|
480 |
/* from the Linux kernel */
|
481 |
|
482 |
struct target_fpreg {
|
483 |
uint16_t significand[4];
|
484 |
uint16_t exponent; |
485 |
}; |
486 |
|
487 |
struct target_fpxreg {
|
488 |
uint16_t significand[4];
|
489 |
uint16_t exponent; |
490 |
uint16_t padding[3];
|
491 |
}; |
492 |
|
493 |
struct target_xmmreg {
|
494 |
target_ulong element[4];
|
495 |
}; |
496 |
|
497 |
struct target_fpstate {
|
498 |
/* Regular FPU environment */
|
499 |
target_ulong cw; |
500 |
target_ulong sw; |
501 |
target_ulong tag; |
502 |
target_ulong ipoff; |
503 |
target_ulong cssel; |
504 |
target_ulong dataoff; |
505 |
target_ulong datasel; |
506 |
struct target_fpreg _st[8]; |
507 |
uint16_t status; |
508 |
uint16_t magic; /* 0xffff = regular FPU data only */
|
509 |
|
510 |
/* FXSR FPU environment */
|
511 |
target_ulong _fxsr_env[6]; /* FXSR FPU env is ignored */ |
512 |
target_ulong mxcsr; |
513 |
target_ulong reserved; |
514 |
struct target_fpxreg _fxsr_st[8]; /* FXSR FPU reg data is ignored */ |
515 |
struct target_xmmreg _xmm[8]; |
516 |
target_ulong padding[56];
|
517 |
}; |
518 |
|
519 |
#define X86_FXSR_MAGIC 0x0000 |
520 |
|
521 |
struct target_sigcontext {
|
522 |
uint16_t gs, __gsh; |
523 |
uint16_t fs, __fsh; |
524 |
uint16_t es, __esh; |
525 |
uint16_t ds, __dsh; |
526 |
target_ulong edi; |
527 |
target_ulong esi; |
528 |
target_ulong ebp; |
529 |
target_ulong esp; |
530 |
target_ulong ebx; |
531 |
target_ulong edx; |
532 |
target_ulong ecx; |
533 |
target_ulong eax; |
534 |
target_ulong trapno; |
535 |
target_ulong err; |
536 |
target_ulong eip; |
537 |
uint16_t cs, __csh; |
538 |
target_ulong eflags; |
539 |
target_ulong esp_at_signal; |
540 |
uint16_t ss, __ssh; |
541 |
target_ulong fpstate; /* pointer */
|
542 |
target_ulong oldmask; |
543 |
target_ulong cr2; |
544 |
}; |
545 |
|
546 |
typedef struct target_sigaltstack { |
547 |
target_ulong ss_sp; |
548 |
int ss_flags;
|
549 |
target_ulong ss_size; |
550 |
} target_stack_t; |
551 |
|
552 |
struct target_ucontext {
|
553 |
target_ulong tuc_flags; |
554 |
target_ulong tuc_link; |
555 |
target_stack_t tuc_stack; |
556 |
struct target_sigcontext tuc_mcontext;
|
557 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
558 |
}; |
559 |
|
560 |
struct sigframe
|
561 |
{ |
562 |
target_ulong pretcode; |
563 |
int sig;
|
564 |
struct target_sigcontext sc;
|
565 |
struct target_fpstate fpstate;
|
566 |
target_ulong extramask[TARGET_NSIG_WORDS-1];
|
567 |
char retcode[8]; |
568 |
}; |
569 |
|
570 |
struct rt_sigframe
|
571 |
{ |
572 |
target_ulong pretcode; |
573 |
int sig;
|
574 |
target_ulong pinfo; |
575 |
target_ulong puc; |
576 |
struct target_siginfo info;
|
577 |
struct target_ucontext uc;
|
578 |
struct target_fpstate fpstate;
|
579 |
char retcode[8]; |
580 |
}; |
581 |
|
582 |
/*
|
583 |
* Set up a signal frame.
|
584 |
*/
|
585 |
|
586 |
/* XXX: save x87 state */
|
587 |
static int |
588 |
setup_sigcontext(struct target_sigcontext *sc, struct target_fpstate *fpstate, |
589 |
CPUX86State *env, unsigned long mask) |
590 |
{ |
591 |
int err = 0; |
592 |
|
593 |
err |= __put_user(env->segs[R_GS].selector, (unsigned int *)&sc->gs); |
594 |
err |= __put_user(env->segs[R_FS].selector, (unsigned int *)&sc->fs); |
595 |
err |= __put_user(env->segs[R_ES].selector, (unsigned int *)&sc->es); |
596 |
err |= __put_user(env->segs[R_DS].selector, (unsigned int *)&sc->ds); |
597 |
err |= __put_user(env->regs[R_EDI], &sc->edi); |
598 |
err |= __put_user(env->regs[R_ESI], &sc->esi); |
599 |
err |= __put_user(env->regs[R_EBP], &sc->ebp); |
600 |
err |= __put_user(env->regs[R_ESP], &sc->esp); |
601 |
err |= __put_user(env->regs[R_EBX], &sc->ebx); |
602 |
err |= __put_user(env->regs[R_EDX], &sc->edx); |
603 |
err |= __put_user(env->regs[R_ECX], &sc->ecx); |
604 |
err |= __put_user(env->regs[R_EAX], &sc->eax); |
605 |
err |= __put_user(env->exception_index, &sc->trapno); |
606 |
err |= __put_user(env->error_code, &sc->err); |
607 |
err |= __put_user(env->eip, &sc->eip); |
608 |
err |= __put_user(env->segs[R_CS].selector, (unsigned int *)&sc->cs); |
609 |
err |= __put_user(env->eflags, &sc->eflags); |
610 |
err |= __put_user(env->regs[R_ESP], &sc->esp_at_signal); |
611 |
err |= __put_user(env->segs[R_SS].selector, (unsigned int *)&sc->ss); |
612 |
|
613 |
cpu_x86_fsave(env, (void *)fpstate, 1); |
614 |
fpstate->status = fpstate->sw; |
615 |
err |= __put_user(0xffff, &fpstate->magic);
|
616 |
err |= __put_user(fpstate, &sc->fpstate); |
617 |
|
618 |
/* non-iBCS2 extensions.. */
|
619 |
err |= __put_user(mask, &sc->oldmask); |
620 |
err |= __put_user(env->cr[2], &sc->cr2);
|
621 |
return err;
|
622 |
} |
623 |
|
624 |
/*
|
625 |
* Determine which stack to use..
|
626 |
*/
|
627 |
|
628 |
static inline void * |
629 |
get_sigframe(struct emulated_sigaction *ka, CPUX86State *env, size_t frame_size)
|
630 |
{ |
631 |
unsigned long esp; |
632 |
|
633 |
/* Default to using normal stack */
|
634 |
esp = env->regs[R_ESP]; |
635 |
#if 0
|
636 |
/* This is the X/Open sanctioned signal stack switching. */
|
637 |
if (ka->sa.sa_flags & SA_ONSTACK) {
|
638 |
if (sas_ss_flags(esp) == 0)
|
639 |
esp = current->sas_ss_sp + current->sas_ss_size;
|
640 |
}
|
641 |
|
642 |
/* This is the legacy signal stack switching. */
|
643 |
else
|
644 |
#endif
|
645 |
if ((env->segs[R_SS].selector & 0xffff) != __USER_DS && |
646 |
!(ka->sa.sa_flags & TARGET_SA_RESTORER) && |
647 |
ka->sa.sa_restorer) { |
648 |
esp = (unsigned long) ka->sa.sa_restorer; |
649 |
} |
650 |
return g2h((esp - frame_size) & -8ul); |
651 |
} |
652 |
|
653 |
static void setup_frame(int sig, struct emulated_sigaction *ka, |
654 |
target_sigset_t *set, CPUX86State *env) |
655 |
{ |
656 |
struct sigframe *frame;
|
657 |
int i, err = 0; |
658 |
|
659 |
frame = get_sigframe(ka, env, sizeof(*frame));
|
660 |
|
661 |
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
662 |
goto give_sigsegv;
|
663 |
err |= __put_user((/*current->exec_domain
|
664 |
&& current->exec_domain->signal_invmap
|
665 |
&& sig < 32
|
666 |
? current->exec_domain->signal_invmap[sig]
|
667 |
: */ sig),
|
668 |
&frame->sig); |
669 |
if (err)
|
670 |
goto give_sigsegv;
|
671 |
|
672 |
setup_sigcontext(&frame->sc, &frame->fpstate, env, set->sig[0]);
|
673 |
if (err)
|
674 |
goto give_sigsegv;
|
675 |
|
676 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
677 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
678 |
goto give_sigsegv;
|
679 |
} |
680 |
|
681 |
/* Set up to return from userspace. If provided, use a stub
|
682 |
already in userspace. */
|
683 |
if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
|
684 |
err |= __put_user(ka->sa.sa_restorer, &frame->pretcode); |
685 |
} else {
|
686 |
err |= __put_user(frame->retcode, &frame->pretcode); |
687 |
/* This is popl %eax ; movl $,%eax ; int $0x80 */
|
688 |
err |= __put_user(0xb858, (short *)(frame->retcode+0)); |
689 |
err |= __put_user(TARGET_NR_sigreturn, (int *)(frame->retcode+2)); |
690 |
err |= __put_user(0x80cd, (short *)(frame->retcode+6)); |
691 |
} |
692 |
|
693 |
if (err)
|
694 |
goto give_sigsegv;
|
695 |
|
696 |
/* Set up registers for signal handler */
|
697 |
env->regs[R_ESP] = h2g(frame); |
698 |
env->eip = (unsigned long) ka->sa._sa_handler; |
699 |
|
700 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
701 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
702 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
703 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
704 |
env->eflags &= ~TF_MASK; |
705 |
|
706 |
return;
|
707 |
|
708 |
give_sigsegv:
|
709 |
if (sig == TARGET_SIGSEGV)
|
710 |
ka->sa._sa_handler = TARGET_SIG_DFL; |
711 |
force_sig(TARGET_SIGSEGV /* , current */);
|
712 |
} |
713 |
|
714 |
static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
715 |
target_siginfo_t *info, |
716 |
target_sigset_t *set, CPUX86State *env) |
717 |
{ |
718 |
struct rt_sigframe *frame;
|
719 |
int i, err = 0; |
720 |
|
721 |
frame = get_sigframe(ka, env, sizeof(*frame));
|
722 |
|
723 |
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) |
724 |
goto give_sigsegv;
|
725 |
|
726 |
err |= __put_user((/*current->exec_domain
|
727 |
&& current->exec_domain->signal_invmap
|
728 |
&& sig < 32
|
729 |
? current->exec_domain->signal_invmap[sig]
|
730 |
: */sig),
|
731 |
&frame->sig); |
732 |
err |= __put_user((target_ulong)&frame->info, &frame->pinfo); |
733 |
err |= __put_user((target_ulong)&frame->uc, &frame->puc); |
734 |
err |= copy_siginfo_to_user(&frame->info, info); |
735 |
if (err)
|
736 |
goto give_sigsegv;
|
737 |
|
738 |
/* Create the ucontext. */
|
739 |
err |= __put_user(0, &frame->uc.tuc_flags);
|
740 |
err |= __put_user(0, &frame->uc.tuc_link);
|
741 |
err |= __put_user(/*current->sas_ss_sp*/ 0, |
742 |
&frame->uc.tuc_stack.ss_sp); |
743 |
err |= __put_user(/* sas_ss_flags(regs->esp) */ 0, |
744 |
&frame->uc.tuc_stack.ss_flags); |
745 |
err |= __put_user(/* current->sas_ss_size */ 0, |
746 |
&frame->uc.tuc_stack.ss_size); |
747 |
err |= setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, |
748 |
env, set->sig[0]);
|
749 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
750 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
751 |
goto give_sigsegv;
|
752 |
} |
753 |
|
754 |
/* Set up to return from userspace. If provided, use a stub
|
755 |
already in userspace. */
|
756 |
if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
|
757 |
err |= __put_user(ka->sa.sa_restorer, &frame->pretcode); |
758 |
} else {
|
759 |
err |= __put_user(frame->retcode, &frame->pretcode); |
760 |
/* This is movl $,%eax ; int $0x80 */
|
761 |
err |= __put_user(0xb8, (char *)(frame->retcode+0)); |
762 |
err |= __put_user(TARGET_NR_rt_sigreturn, (int *)(frame->retcode+1)); |
763 |
err |= __put_user(0x80cd, (short *)(frame->retcode+5)); |
764 |
} |
765 |
|
766 |
if (err)
|
767 |
goto give_sigsegv;
|
768 |
|
769 |
/* Set up registers for signal handler */
|
770 |
env->regs[R_ESP] = (unsigned long) frame; |
771 |
env->eip = (unsigned long) ka->sa._sa_handler; |
772 |
|
773 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
774 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
775 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
776 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
777 |
env->eflags &= ~TF_MASK; |
778 |
|
779 |
return;
|
780 |
|
781 |
give_sigsegv:
|
782 |
if (sig == TARGET_SIGSEGV)
|
783 |
ka->sa._sa_handler = TARGET_SIG_DFL; |
784 |
force_sig(TARGET_SIGSEGV /* , current */);
|
785 |
} |
786 |
|
787 |
static int |
788 |
restore_sigcontext(CPUX86State *env, struct target_sigcontext *sc, int *peax) |
789 |
{ |
790 |
unsigned int err = 0; |
791 |
|
792 |
cpu_x86_load_seg(env, R_GS, lduw(&sc->gs)); |
793 |
cpu_x86_load_seg(env, R_FS, lduw(&sc->fs)); |
794 |
cpu_x86_load_seg(env, R_ES, lduw(&sc->es)); |
795 |
cpu_x86_load_seg(env, R_DS, lduw(&sc->ds)); |
796 |
|
797 |
env->regs[R_EDI] = ldl(&sc->edi); |
798 |
env->regs[R_ESI] = ldl(&sc->esi); |
799 |
env->regs[R_EBP] = ldl(&sc->ebp); |
800 |
env->regs[R_ESP] = ldl(&sc->esp); |
801 |
env->regs[R_EBX] = ldl(&sc->ebx); |
802 |
env->regs[R_EDX] = ldl(&sc->edx); |
803 |
env->regs[R_ECX] = ldl(&sc->ecx); |
804 |
env->eip = ldl(&sc->eip); |
805 |
|
806 |
cpu_x86_load_seg(env, R_CS, lduw(&sc->cs) | 3);
|
807 |
cpu_x86_load_seg(env, R_SS, lduw(&sc->ss) | 3);
|
808 |
|
809 |
{ |
810 |
unsigned int tmpflags; |
811 |
tmpflags = ldl(&sc->eflags); |
812 |
env->eflags = (env->eflags & ~0x40DD5) | (tmpflags & 0x40DD5); |
813 |
// regs->orig_eax = -1; /* disable syscall checks */
|
814 |
} |
815 |
|
816 |
{ |
817 |
struct _fpstate * buf;
|
818 |
buf = (void *)ldl(&sc->fpstate);
|
819 |
if (buf) {
|
820 |
#if 0
|
821 |
if (verify_area(VERIFY_READ, buf, sizeof(*buf)))
|
822 |
goto badframe;
|
823 |
#endif
|
824 |
cpu_x86_frstor(env, (void *)buf, 1); |
825 |
} |
826 |
} |
827 |
|
828 |
*peax = ldl(&sc->eax); |
829 |
return err;
|
830 |
#if 0
|
831 |
badframe:
|
832 |
return 1;
|
833 |
#endif
|
834 |
} |
835 |
|
836 |
long do_sigreturn(CPUX86State *env)
|
837 |
{ |
838 |
struct sigframe *frame = (struct sigframe *)g2h(env->regs[R_ESP] - 8); |
839 |
target_sigset_t target_set; |
840 |
sigset_t set; |
841 |
int eax, i;
|
842 |
|
843 |
#if defined(DEBUG_SIGNAL)
|
844 |
fprintf(stderr, "do_sigreturn\n");
|
845 |
#endif
|
846 |
/* set blocked signals */
|
847 |
if (__get_user(target_set.sig[0], &frame->sc.oldmask)) |
848 |
goto badframe;
|
849 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
850 |
if (__get_user(target_set.sig[i], &frame->extramask[i - 1])) |
851 |
goto badframe;
|
852 |
} |
853 |
|
854 |
target_to_host_sigset_internal(&set, &target_set); |
855 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
856 |
|
857 |
/* restore registers */
|
858 |
if (restore_sigcontext(env, &frame->sc, &eax))
|
859 |
goto badframe;
|
860 |
return eax;
|
861 |
|
862 |
badframe:
|
863 |
force_sig(TARGET_SIGSEGV); |
864 |
return 0; |
865 |
} |
866 |
|
867 |
long do_rt_sigreturn(CPUX86State *env)
|
868 |
{ |
869 |
struct rt_sigframe *frame = (struct rt_sigframe *)g2h(env->regs[R_ESP] - 4); |
870 |
sigset_t set; |
871 |
// stack_t st;
|
872 |
int eax;
|
873 |
|
874 |
#if 0
|
875 |
if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
|
876 |
goto badframe;
|
877 |
#endif
|
878 |
target_to_host_sigset(&set, &frame->uc.tuc_sigmask); |
879 |
sigprocmask(SIG_SETMASK, &set, NULL);
|
880 |
|
881 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext, &eax))
|
882 |
goto badframe;
|
883 |
|
884 |
#if 0
|
885 |
if (__copy_from_user(&st, &frame->uc.tuc_stack, sizeof(st)))
|
886 |
goto badframe;
|
887 |
/* It is more difficult to avoid calling this function than to
|
888 |
call it and ignore errors. */
|
889 |
do_sigaltstack(&st, NULL, regs->esp);
|
890 |
#endif
|
891 |
return eax;
|
892 |
|
893 |
badframe:
|
894 |
force_sig(TARGET_SIGSEGV); |
895 |
return 0; |
896 |
} |
897 |
|
898 |
#elif defined(TARGET_ARM)
|
899 |
|
900 |
struct target_sigcontext {
|
901 |
target_ulong trap_no; |
902 |
target_ulong error_code; |
903 |
target_ulong oldmask; |
904 |
target_ulong arm_r0; |
905 |
target_ulong arm_r1; |
906 |
target_ulong arm_r2; |
907 |
target_ulong arm_r3; |
908 |
target_ulong arm_r4; |
909 |
target_ulong arm_r5; |
910 |
target_ulong arm_r6; |
911 |
target_ulong arm_r7; |
912 |
target_ulong arm_r8; |
913 |
target_ulong arm_r9; |
914 |
target_ulong arm_r10; |
915 |
target_ulong arm_fp; |
916 |
target_ulong arm_ip; |
917 |
target_ulong arm_sp; |
918 |
target_ulong arm_lr; |
919 |
target_ulong arm_pc; |
920 |
target_ulong arm_cpsr; |
921 |
target_ulong fault_address; |
922 |
}; |
923 |
|
924 |
typedef struct target_sigaltstack { |
925 |
target_ulong ss_sp; |
926 |
int ss_flags;
|
927 |
target_ulong ss_size; |
928 |
} target_stack_t; |
929 |
|
930 |
struct target_ucontext {
|
931 |
target_ulong tuc_flags; |
932 |
target_ulong tuc_link; |
933 |
target_stack_t tuc_stack; |
934 |
struct target_sigcontext tuc_mcontext;
|
935 |
target_sigset_t tuc_sigmask; /* mask last for extensibility */
|
936 |
}; |
937 |
|
938 |
struct sigframe
|
939 |
{ |
940 |
struct target_sigcontext sc;
|
941 |
target_ulong extramask[TARGET_NSIG_WORDS-1];
|
942 |
target_ulong retcode; |
943 |
}; |
944 |
|
945 |
struct rt_sigframe
|
946 |
{ |
947 |
struct target_siginfo *pinfo;
|
948 |
void *puc;
|
949 |
struct target_siginfo info;
|
950 |
struct target_ucontext uc;
|
951 |
target_ulong retcode; |
952 |
}; |
953 |
|
954 |
#define TARGET_CONFIG_CPU_32 1 |
955 |
|
956 |
/*
|
957 |
* For ARM syscalls, we encode the syscall number into the instruction.
|
958 |
*/
|
959 |
#define SWI_SYS_SIGRETURN (0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE)) |
960 |
#define SWI_SYS_RT_SIGRETURN (0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE)) |
961 |
|
962 |
/*
|
963 |
* For Thumb syscalls, we pass the syscall number via r7. We therefore
|
964 |
* need two 16-bit instructions.
|
965 |
*/
|
966 |
#define SWI_THUMB_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn)) |
967 |
#define SWI_THUMB_RT_SIGRETURN (0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn)) |
968 |
|
969 |
static const target_ulong retcodes[4] = { |
970 |
SWI_SYS_SIGRETURN, SWI_THUMB_SIGRETURN, |
971 |
SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN |
972 |
}; |
973 |
|
974 |
|
975 |
#define __put_user_error(x,p,e) __put_user(x, p)
|
976 |
#define __get_user_error(x,p,e) __get_user(x, p)
|
977 |
|
978 |
static inline int valid_user_regs(CPUState *regs) |
979 |
{ |
980 |
return 1; |
981 |
} |
982 |
|
983 |
static int |
984 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ |
985 |
CPUState *env, unsigned long mask) |
986 |
{ |
987 |
int err = 0; |
988 |
|
989 |
__put_user_error(env->regs[0], &sc->arm_r0, err);
|
990 |
__put_user_error(env->regs[1], &sc->arm_r1, err);
|
991 |
__put_user_error(env->regs[2], &sc->arm_r2, err);
|
992 |
__put_user_error(env->regs[3], &sc->arm_r3, err);
|
993 |
__put_user_error(env->regs[4], &sc->arm_r4, err);
|
994 |
__put_user_error(env->regs[5], &sc->arm_r5, err);
|
995 |
__put_user_error(env->regs[6], &sc->arm_r6, err);
|
996 |
__put_user_error(env->regs[7], &sc->arm_r7, err);
|
997 |
__put_user_error(env->regs[8], &sc->arm_r8, err);
|
998 |
__put_user_error(env->regs[9], &sc->arm_r9, err);
|
999 |
__put_user_error(env->regs[10], &sc->arm_r10, err);
|
1000 |
__put_user_error(env->regs[11], &sc->arm_fp, err);
|
1001 |
__put_user_error(env->regs[12], &sc->arm_ip, err);
|
1002 |
__put_user_error(env->regs[13], &sc->arm_sp, err);
|
1003 |
__put_user_error(env->regs[14], &sc->arm_lr, err);
|
1004 |
__put_user_error(env->regs[15], &sc->arm_pc, err);
|
1005 |
#ifdef TARGET_CONFIG_CPU_32
|
1006 |
__put_user_error(cpsr_read(env), &sc->arm_cpsr, err); |
1007 |
#endif
|
1008 |
|
1009 |
__put_user_error(/* current->thread.trap_no */ 0, &sc->trap_no, err); |
1010 |
__put_user_error(/* current->thread.error_code */ 0, &sc->error_code, err); |
1011 |
__put_user_error(/* current->thread.address */ 0, &sc->fault_address, err); |
1012 |
__put_user_error(mask, &sc->oldmask, err); |
1013 |
|
1014 |
return err;
|
1015 |
} |
1016 |
|
1017 |
static inline void * |
1018 |
get_sigframe(struct emulated_sigaction *ka, CPUState *regs, int framesize) |
1019 |
{ |
1020 |
unsigned long sp = regs->regs[13]; |
1021 |
|
1022 |
#if 0
|
1023 |
/*
|
1024 |
* This is the X/Open sanctioned signal stack switching.
|
1025 |
*/
|
1026 |
if ((ka->sa.sa_flags & SA_ONSTACK) && !sas_ss_flags(sp))
|
1027 |
sp = current->sas_ss_sp + current->sas_ss_size;
|
1028 |
#endif
|
1029 |
/*
|
1030 |
* ATPCS B01 mandates 8-byte alignment
|
1031 |
*/
|
1032 |
return g2h((sp - framesize) & ~7); |
1033 |
} |
1034 |
|
1035 |
static int |
1036 |
setup_return(CPUState *env, struct emulated_sigaction *ka,
|
1037 |
target_ulong *rc, void *frame, int usig) |
1038 |
{ |
1039 |
target_ulong handler = (target_ulong)ka->sa._sa_handler; |
1040 |
target_ulong retcode; |
1041 |
int thumb = 0; |
1042 |
#if defined(TARGET_CONFIG_CPU_32)
|
1043 |
#if 0
|
1044 |
target_ulong cpsr = env->cpsr;
|
1045 |
|
1046 |
/*
|
1047 |
* Maybe we need to deliver a 32-bit signal to a 26-bit task.
|
1048 |
*/
|
1049 |
if (ka->sa.sa_flags & SA_THIRTYTWO)
|
1050 |
cpsr = (cpsr & ~MODE_MASK) | USR_MODE;
|
1051 |
|
1052 |
#ifdef CONFIG_ARM_THUMB
|
1053 |
if (elf_hwcap & HWCAP_THUMB) {
|
1054 |
/*
|
1055 |
* The LSB of the handler determines if we're going to
|
1056 |
* be using THUMB or ARM mode for this signal handler.
|
1057 |
*/
|
1058 |
thumb = handler & 1;
|
1059 |
|
1060 |
if (thumb)
|
1061 |
cpsr |= T_BIT;
|
1062 |
else
|
1063 |
cpsr &= ~T_BIT;
|
1064 |
}
|
1065 |
#endif
|
1066 |
#endif
|
1067 |
#endif /* TARGET_CONFIG_CPU_32 */ |
1068 |
|
1069 |
if (ka->sa.sa_flags & TARGET_SA_RESTORER) {
|
1070 |
retcode = (target_ulong)ka->sa.sa_restorer; |
1071 |
} else {
|
1072 |
unsigned int idx = thumb; |
1073 |
|
1074 |
if (ka->sa.sa_flags & TARGET_SA_SIGINFO)
|
1075 |
idx += 2;
|
1076 |
|
1077 |
if (__put_user(retcodes[idx], rc))
|
1078 |
return 1; |
1079 |
#if 0
|
1080 |
flush_icache_range((target_ulong)rc,
|
1081 |
(target_ulong)(rc + 1));
|
1082 |
#endif
|
1083 |
retcode = ((target_ulong)rc) + thumb; |
1084 |
} |
1085 |
|
1086 |
env->regs[0] = usig;
|
1087 |
env->regs[13] = h2g(frame);
|
1088 |
env->regs[14] = retcode;
|
1089 |
env->regs[15] = handler & (thumb ? ~1 : ~3); |
1090 |
|
1091 |
#if 0
|
1092 |
#ifdef TARGET_CONFIG_CPU_32
|
1093 |
env->cpsr = cpsr;
|
1094 |
#endif
|
1095 |
#endif
|
1096 |
|
1097 |
return 0; |
1098 |
} |
1099 |
|
1100 |
static void setup_frame(int usig, struct emulated_sigaction *ka, |
1101 |
target_sigset_t *set, CPUState *regs) |
1102 |
{ |
1103 |
struct sigframe *frame = get_sigframe(ka, regs, sizeof(*frame)); |
1104 |
int i, err = 0; |
1105 |
|
1106 |
err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]); |
1107 |
|
1108 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1109 |
if (__put_user(set->sig[i], &frame->extramask[i - 1])) |
1110 |
return;
|
1111 |
} |
1112 |
|
1113 |
if (err == 0) |
1114 |
err = setup_return(regs, ka, &frame->retcode, frame, usig); |
1115 |
// return err;
|
1116 |
} |
1117 |
|
1118 |
static void setup_rt_frame(int usig, struct emulated_sigaction *ka, |
1119 |
target_siginfo_t *info, |
1120 |
target_sigset_t *set, CPUState *env) |
1121 |
{ |
1122 |
struct rt_sigframe *frame = get_sigframe(ka, env, sizeof(*frame)); |
1123 |
int i, err = 0; |
1124 |
|
1125 |
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) |
1126 |
return /* 1 */; |
1127 |
|
1128 |
__put_user_error(&frame->info, (target_ulong *)&frame->pinfo, err); |
1129 |
__put_user_error(&frame->uc, (target_ulong *)&frame->puc, err); |
1130 |
err |= copy_siginfo_to_user(&frame->info, info); |
1131 |
|
1132 |
/* Clear all the bits of the ucontext we don't use. */
|
1133 |
memset(&frame->uc, 0, offsetof(struct target_ucontext, tuc_mcontext)); |
1134 |
|
1135 |
err |= setup_sigcontext(&frame->uc.tuc_mcontext, /*&frame->fpstate,*/
|
1136 |
env, set->sig[0]);
|
1137 |
for(i = 0; i < TARGET_NSIG_WORDS; i++) { |
1138 |
if (__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]))
|
1139 |
return;
|
1140 |
} |
1141 |
|
1142 |
if (err == 0) |
1143 |
err = setup_return(env, ka, &frame->retcode, frame, usig); |
1144 |
|
1145 |
if (err == 0) { |
1146 |
/*
|
1147 |
* For realtime signals we must also set the second and third
|
1148 |
* arguments for the signal handler.
|
1149 |
* -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
|
1150 |
*/
|
1151 |
env->regs[1] = (target_ulong)frame->pinfo;
|
1152 |
env->regs[2] = (target_ulong)frame->puc;
|
1153 |
} |
1154 |
|
1155 |
// return err;
|
1156 |
} |
1157 |
|
1158 |
static int |
1159 |
restore_sigcontext(CPUState *env, struct target_sigcontext *sc)
|
1160 |
{ |
1161 |
int err = 0; |
1162 |
uint32_t cpsr; |
1163 |
|
1164 |
__get_user_error(env->regs[0], &sc->arm_r0, err);
|
1165 |
__get_user_error(env->regs[1], &sc->arm_r1, err);
|
1166 |
__get_user_error(env->regs[2], &sc->arm_r2, err);
|
1167 |
__get_user_error(env->regs[3], &sc->arm_r3, err);
|
1168 |
__get_user_error(env->regs[4], &sc->arm_r4, err);
|
1169 |
__get_user_error(env->regs[5], &sc->arm_r5, err);
|
1170 |
__get_user_error(env->regs[6], &sc->arm_r6, err);
|
1171 |
__get_user_error(env->regs[7], &sc->arm_r7, err);
|
1172 |
__get_user_error(env->regs[8], &sc->arm_r8, err);
|
1173 |
__get_user_error(env->regs[9], &sc->arm_r9, err);
|
1174 |
__get_user_error(env->regs[10], &sc->arm_r10, err);
|
1175 |
__get_user_error(env->regs[11], &sc->arm_fp, err);
|
1176 |
__get_user_error(env->regs[12], &sc->arm_ip, err);
|
1177 |
__get_user_error(env->regs[13], &sc->arm_sp, err);
|
1178 |
__get_user_error(env->regs[14], &sc->arm_lr, err);
|
1179 |
__get_user_error(env->regs[15], &sc->arm_pc, err);
|
1180 |
#ifdef TARGET_CONFIG_CPU_32
|
1181 |
__get_user_error(cpsr, &sc->arm_cpsr, err); |
1182 |
cpsr_write(env, cpsr, 0xffffffff);
|
1183 |
#endif
|
1184 |
|
1185 |
err |= !valid_user_regs(env); |
1186 |
|
1187 |
return err;
|
1188 |
} |
1189 |
|
1190 |
long do_sigreturn(CPUState *env)
|
1191 |
{ |
1192 |
struct sigframe *frame;
|
1193 |
target_sigset_t set; |
1194 |
sigset_t host_set; |
1195 |
int i;
|
1196 |
|
1197 |
/*
|
1198 |
* Since we stacked the signal on a 64-bit boundary,
|
1199 |
* then 'sp' should be word aligned here. If it's
|
1200 |
* not, then the user is trying to mess with us.
|
1201 |
*/
|
1202 |
if (env->regs[13] & 7) |
1203 |
goto badframe;
|
1204 |
|
1205 |
frame = (struct sigframe *)g2h(env->regs[13]); |
1206 |
|
1207 |
#if 0
|
1208 |
if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
|
1209 |
goto badframe;
|
1210 |
#endif
|
1211 |
if (__get_user(set.sig[0], &frame->sc.oldmask)) |
1212 |
goto badframe;
|
1213 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1214 |
if (__get_user(set.sig[i], &frame->extramask[i - 1])) |
1215 |
goto badframe;
|
1216 |
} |
1217 |
|
1218 |
target_to_host_sigset_internal(&host_set, &set); |
1219 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1220 |
|
1221 |
if (restore_sigcontext(env, &frame->sc))
|
1222 |
goto badframe;
|
1223 |
|
1224 |
#if 0
|
1225 |
/* Send SIGTRAP if we're single-stepping */
|
1226 |
if (ptrace_cancel_bpt(current))
|
1227 |
send_sig(SIGTRAP, current, 1);
|
1228 |
#endif
|
1229 |
return env->regs[0]; |
1230 |
|
1231 |
badframe:
|
1232 |
force_sig(SIGSEGV /* , current */);
|
1233 |
return 0; |
1234 |
} |
1235 |
|
1236 |
long do_rt_sigreturn(CPUState *env)
|
1237 |
{ |
1238 |
struct rt_sigframe *frame;
|
1239 |
sigset_t host_set; |
1240 |
|
1241 |
/*
|
1242 |
* Since we stacked the signal on a 64-bit boundary,
|
1243 |
* then 'sp' should be word aligned here. If it's
|
1244 |
* not, then the user is trying to mess with us.
|
1245 |
*/
|
1246 |
if (env->regs[13] & 7) |
1247 |
goto badframe;
|
1248 |
|
1249 |
frame = (struct rt_sigframe *)env->regs[13]; |
1250 |
|
1251 |
#if 0
|
1252 |
if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
|
1253 |
goto badframe;
|
1254 |
#endif
|
1255 |
target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask); |
1256 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1257 |
|
1258 |
if (restore_sigcontext(env, &frame->uc.tuc_mcontext))
|
1259 |
goto badframe;
|
1260 |
|
1261 |
#if 0
|
1262 |
/* Send SIGTRAP if we're single-stepping */
|
1263 |
if (ptrace_cancel_bpt(current))
|
1264 |
send_sig(SIGTRAP, current, 1);
|
1265 |
#endif
|
1266 |
return env->regs[0]; |
1267 |
|
1268 |
badframe:
|
1269 |
force_sig(SIGSEGV /* , current */);
|
1270 |
return 0; |
1271 |
} |
1272 |
|
1273 |
#elif defined(TARGET_SPARC)
|
1274 |
|
1275 |
#define __SUNOS_MAXWIN 31 |
1276 |
|
1277 |
/* This is what SunOS does, so shall I. */
|
1278 |
struct target_sigcontext {
|
1279 |
target_ulong sigc_onstack; /* state to restore */
|
1280 |
|
1281 |
target_ulong sigc_mask; /* sigmask to restore */
|
1282 |
target_ulong sigc_sp; /* stack pointer */
|
1283 |
target_ulong sigc_pc; /* program counter */
|
1284 |
target_ulong sigc_npc; /* next program counter */
|
1285 |
target_ulong sigc_psr; /* for condition codes etc */
|
1286 |
target_ulong sigc_g1; /* User uses these two registers */
|
1287 |
target_ulong sigc_o0; /* within the trampoline code. */
|
1288 |
|
1289 |
/* Now comes information regarding the users window set
|
1290 |
* at the time of the signal.
|
1291 |
*/
|
1292 |
target_ulong sigc_oswins; /* outstanding windows */
|
1293 |
|
1294 |
/* stack ptrs for each regwin buf */
|
1295 |
char *sigc_spbuf[__SUNOS_MAXWIN];
|
1296 |
|
1297 |
/* Windows to restore after signal */
|
1298 |
struct {
|
1299 |
target_ulong locals[8];
|
1300 |
target_ulong ins[8];
|
1301 |
} sigc_wbuf[__SUNOS_MAXWIN]; |
1302 |
}; |
1303 |
/* A Sparc stack frame */
|
1304 |
struct sparc_stackf {
|
1305 |
target_ulong locals[8];
|
1306 |
target_ulong ins[6];
|
1307 |
struct sparc_stackf *fp;
|
1308 |
target_ulong callers_pc; |
1309 |
char *structptr;
|
1310 |
target_ulong xargs[6];
|
1311 |
target_ulong xxargs[1];
|
1312 |
}; |
1313 |
|
1314 |
typedef struct { |
1315 |
struct {
|
1316 |
target_ulong psr; |
1317 |
target_ulong pc; |
1318 |
target_ulong npc; |
1319 |
target_ulong y; |
1320 |
target_ulong u_regs[16]; /* globals and ins */ |
1321 |
} si_regs; |
1322 |
int si_mask;
|
1323 |
} __siginfo_t; |
1324 |
|
1325 |
typedef struct { |
1326 |
unsigned long si_float_regs [32]; |
1327 |
unsigned long si_fsr; |
1328 |
unsigned long si_fpqdepth; |
1329 |
struct {
|
1330 |
unsigned long *insn_addr; |
1331 |
unsigned long insn; |
1332 |
} si_fpqueue [16];
|
1333 |
} __siginfo_fpu_t; |
1334 |
|
1335 |
|
1336 |
struct target_signal_frame {
|
1337 |
struct sparc_stackf ss;
|
1338 |
__siginfo_t info; |
1339 |
__siginfo_fpu_t *fpu_save; |
1340 |
target_ulong insns[2] __attribute__ ((aligned (8))); |
1341 |
target_ulong extramask[TARGET_NSIG_WORDS - 1];
|
1342 |
target_ulong extra_size; /* Should be 0 */
|
1343 |
__siginfo_fpu_t fpu_state; |
1344 |
}; |
1345 |
struct target_rt_signal_frame {
|
1346 |
struct sparc_stackf ss;
|
1347 |
siginfo_t info; |
1348 |
target_ulong regs[20];
|
1349 |
sigset_t mask; |
1350 |
__siginfo_fpu_t *fpu_save; |
1351 |
unsigned int insns[2]; |
1352 |
stack_t stack; |
1353 |
unsigned int extra_size; /* Should be 0 */ |
1354 |
__siginfo_fpu_t fpu_state; |
1355 |
}; |
1356 |
|
1357 |
#define UREG_O0 16 |
1358 |
#define UREG_O6 22 |
1359 |
#define UREG_I0 0 |
1360 |
#define UREG_I1 1 |
1361 |
#define UREG_I2 2 |
1362 |
#define UREG_I6 6 |
1363 |
#define UREG_I7 7 |
1364 |
#define UREG_L0 8 |
1365 |
#define UREG_FP UREG_I6
|
1366 |
#define UREG_SP UREG_O6
|
1367 |
|
1368 |
static inline void *get_sigframe(struct emulated_sigaction *sa, CPUState *env, unsigned long framesize) |
1369 |
{ |
1370 |
unsigned long sp; |
1371 |
|
1372 |
sp = env->regwptr[UREG_FP]; |
1373 |
#if 0
|
1374 |
|
1375 |
/* This is the X/Open sanctioned signal stack switching. */
|
1376 |
if (sa->sa_flags & TARGET_SA_ONSTACK) {
|
1377 |
if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7))
|
1378 |
sp = current->sas_ss_sp + current->sas_ss_size;
|
1379 |
}
|
1380 |
#endif
|
1381 |
return g2h(sp - framesize);
|
1382 |
} |
1383 |
|
1384 |
static int |
1385 |
setup___siginfo(__siginfo_t *si, CPUState *env, target_ulong mask) |
1386 |
{ |
1387 |
int err = 0, i; |
1388 |
|
1389 |
err |= __put_user(env->psr, &si->si_regs.psr); |
1390 |
err |= __put_user(env->pc, &si->si_regs.pc); |
1391 |
err |= __put_user(env->npc, &si->si_regs.npc); |
1392 |
err |= __put_user(env->y, &si->si_regs.y); |
1393 |
for (i=0; i < 8; i++) { |
1394 |
err |= __put_user(env->gregs[i], &si->si_regs.u_regs[i]); |
1395 |
} |
1396 |
for (i=0; i < 8; i++) { |
1397 |
err |= __put_user(env->regwptr[UREG_I0 + i], &si->si_regs.u_regs[i+8]);
|
1398 |
} |
1399 |
err |= __put_user(mask, &si->si_mask); |
1400 |
return err;
|
1401 |
} |
1402 |
|
1403 |
#if 0
|
1404 |
static int
|
1405 |
setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
|
1406 |
CPUState *env, unsigned long mask)
|
1407 |
{
|
1408 |
int err = 0;
|
1409 |
|
1410 |
err |= __put_user(mask, &sc->sigc_mask);
|
1411 |
err |= __put_user(env->regwptr[UREG_SP], &sc->sigc_sp);
|
1412 |
err |= __put_user(env->pc, &sc->sigc_pc);
|
1413 |
err |= __put_user(env->npc, &sc->sigc_npc);
|
1414 |
err |= __put_user(env->psr, &sc->sigc_psr);
|
1415 |
err |= __put_user(env->gregs[1], &sc->sigc_g1);
|
1416 |
err |= __put_user(env->regwptr[UREG_O0], &sc->sigc_o0);
|
1417 |
|
1418 |
return err;
|
1419 |
}
|
1420 |
#endif
|
1421 |
#define NF_ALIGNEDSZ (((sizeof(struct target_signal_frame) + 7) & (~7))) |
1422 |
|
1423 |
static void setup_frame(int sig, struct emulated_sigaction *ka, |
1424 |
target_sigset_t *set, CPUState *env) |
1425 |
{ |
1426 |
struct target_signal_frame *sf;
|
1427 |
int sigframe_size, err, i;
|
1428 |
|
1429 |
/* 1. Make sure everything is clean */
|
1430 |
//synchronize_user_stack();
|
1431 |
|
1432 |
sigframe_size = NF_ALIGNEDSZ; |
1433 |
|
1434 |
sf = (struct target_signal_frame *)
|
1435 |
get_sigframe(ka, env, sigframe_size); |
1436 |
|
1437 |
//fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
1438 |
#if 0
|
1439 |
if (invalid_frame_pointer(sf, sigframe_size))
|
1440 |
goto sigill_and_return;
|
1441 |
#endif
|
1442 |
/* 2. Save the current process state */
|
1443 |
err = setup___siginfo(&sf->info, env, set->sig[0]);
|
1444 |
err |= __put_user(0, &sf->extra_size);
|
1445 |
|
1446 |
//err |= save_fpu_state(regs, &sf->fpu_state);
|
1447 |
//err |= __put_user(&sf->fpu_state, &sf->fpu_save);
|
1448 |
|
1449 |
err |= __put_user(set->sig[0], &sf->info.si_mask);
|
1450 |
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) { |
1451 |
err |= __put_user(set->sig[i + 1], &sf->extramask[i]);
|
1452 |
} |
1453 |
|
1454 |
for (i = 0; i < 8; i++) { |
1455 |
err |= __put_user(env->regwptr[i + UREG_L0], &sf->ss.locals[i]); |
1456 |
} |
1457 |
for (i = 0; i < 8; i++) { |
1458 |
err |= __put_user(env->regwptr[i + UREG_I0], &sf->ss.ins[i]); |
1459 |
} |
1460 |
if (err)
|
1461 |
goto sigsegv;
|
1462 |
|
1463 |
/* 3. signal handler back-trampoline and parameters */
|
1464 |
env->regwptr[UREG_FP] = h2g(sf); |
1465 |
env->regwptr[UREG_I0] = sig; |
1466 |
env->regwptr[UREG_I1] = h2g(&sf->info); |
1467 |
env->regwptr[UREG_I2] = h2g(&sf->info); |
1468 |
|
1469 |
/* 4. signal handler */
|
1470 |
env->pc = (unsigned long) ka->sa._sa_handler; |
1471 |
env->npc = (env->pc + 4);
|
1472 |
/* 5. return to kernel instructions */
|
1473 |
if (ka->sa.sa_restorer)
|
1474 |
env->regwptr[UREG_I7] = (unsigned long)ka->sa.sa_restorer; |
1475 |
else {
|
1476 |
env->regwptr[UREG_I7] = h2g(&(sf->insns[0]) - 2); |
1477 |
|
1478 |
/* mov __NR_sigreturn, %g1 */
|
1479 |
err |= __put_user(0x821020d8, &sf->insns[0]); |
1480 |
|
1481 |
/* t 0x10 */
|
1482 |
err |= __put_user(0x91d02010, &sf->insns[1]); |
1483 |
if (err)
|
1484 |
goto sigsegv;
|
1485 |
|
1486 |
/* Flush instruction space. */
|
1487 |
//flush_sig_insns(current->mm, (unsigned long) &(sf->insns[0]));
|
1488 |
// tb_flush(env);
|
1489 |
} |
1490 |
return;
|
1491 |
|
1492 |
//sigill_and_return:
|
1493 |
force_sig(TARGET_SIGILL); |
1494 |
sigsegv:
|
1495 |
//fprintf(stderr, "force_sig\n");
|
1496 |
force_sig(TARGET_SIGSEGV); |
1497 |
} |
1498 |
static inline int |
1499 |
restore_fpu_state(CPUState *env, __siginfo_fpu_t *fpu) |
1500 |
{ |
1501 |
int err;
|
1502 |
#if 0
|
1503 |
#ifdef CONFIG_SMP
|
1504 |
if (current->flags & PF_USEDFPU)
|
1505 |
regs->psr &= ~PSR_EF;
|
1506 |
#else
|
1507 |
if (current == last_task_used_math) {
|
1508 |
last_task_used_math = 0;
|
1509 |
regs->psr &= ~PSR_EF; |
1510 |
} |
1511 |
#endif
|
1512 |
current->used_math = 1;
|
1513 |
current->flags &= ~PF_USEDFPU; |
1514 |
#endif
|
1515 |
#if 0
|
1516 |
if (verify_area (VERIFY_READ, fpu, sizeof(*fpu)))
|
1517 |
return -EFAULT;
|
1518 |
#endif
|
1519 |
|
1520 |
err = __copy_from_user(&env->fpr[0], &fpu->si_float_regs[0], |
1521 |
(sizeof(unsigned long) * 32)); |
1522 |
err |= __get_user(env->fsr, &fpu->si_fsr); |
1523 |
#if 0
|
1524 |
err |= __get_user(current->thread.fpqdepth, &fpu->si_fpqdepth);
|
1525 |
if (current->thread.fpqdepth != 0)
|
1526 |
err |= __copy_from_user(¤t->thread.fpqueue[0],
|
1527 |
&fpu->si_fpqueue[0],
|
1528 |
((sizeof(unsigned long) +
|
1529 |
(sizeof(unsigned long *)))*16));
|
1530 |
#endif
|
1531 |
return err;
|
1532 |
} |
1533 |
|
1534 |
|
1535 |
static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
1536 |
target_siginfo_t *info, |
1537 |
target_sigset_t *set, CPUState *env) |
1538 |
{ |
1539 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
1540 |
} |
1541 |
|
1542 |
long do_sigreturn(CPUState *env)
|
1543 |
{ |
1544 |
struct target_signal_frame *sf;
|
1545 |
uint32_t up_psr, pc, npc; |
1546 |
target_sigset_t set; |
1547 |
sigset_t host_set; |
1548 |
target_ulong fpu_save; |
1549 |
int err, i;
|
1550 |
|
1551 |
sf = (struct target_signal_frame *)g2h(env->regwptr[UREG_FP]);
|
1552 |
#if 0
|
1553 |
fprintf(stderr, "sigreturn\n");
|
1554 |
fprintf(stderr, "sf: %x pc %x fp %x sp %x\n", sf, env->pc, env->regwptr[UREG_FP], env->regwptr[UREG_SP]);
|
1555 |
#endif
|
1556 |
//cpu_dump_state(env, stderr, fprintf, 0);
|
1557 |
|
1558 |
/* 1. Make sure we are not getting garbage from the user */
|
1559 |
#if 0
|
1560 |
if (verify_area (VERIFY_READ, sf, sizeof (*sf)))
|
1561 |
goto segv_and_exit;
|
1562 |
#endif
|
1563 |
|
1564 |
if (((uint) sf) & 3) |
1565 |
goto segv_and_exit;
|
1566 |
|
1567 |
err = __get_user(pc, &sf->info.si_regs.pc); |
1568 |
err |= __get_user(npc, &sf->info.si_regs.npc); |
1569 |
|
1570 |
if ((pc | npc) & 3) |
1571 |
goto segv_and_exit;
|
1572 |
|
1573 |
/* 2. Restore the state */
|
1574 |
err |= __get_user(up_psr, &sf->info.si_regs.psr); |
1575 |
|
1576 |
/* User can only change condition codes and FPU enabling in %psr. */
|
1577 |
env->psr = (up_psr & (PSR_ICC /* | PSR_EF */))
|
1578 |
| (env->psr & ~(PSR_ICC /* | PSR_EF */));
|
1579 |
|
1580 |
env->pc = pc; |
1581 |
env->npc = npc; |
1582 |
err |= __get_user(env->y, &sf->info.si_regs.y); |
1583 |
for (i=0; i < 8; i++) { |
1584 |
err |= __get_user(env->gregs[i], &sf->info.si_regs.u_regs[i]); |
1585 |
} |
1586 |
for (i=0; i < 8; i++) { |
1587 |
err |= __get_user(env->regwptr[i + UREG_I0], &sf->info.si_regs.u_regs[i+8]);
|
1588 |
} |
1589 |
|
1590 |
err |= __get_user(fpu_save, (target_ulong *)&sf->fpu_save); |
1591 |
|
1592 |
//if (fpu_save)
|
1593 |
// err |= restore_fpu_state(env, fpu_save);
|
1594 |
|
1595 |
/* This is pretty much atomic, no amount locking would prevent
|
1596 |
* the races which exist anyways.
|
1597 |
*/
|
1598 |
err |= __get_user(set.sig[0], &sf->info.si_mask);
|
1599 |
for(i = 1; i < TARGET_NSIG_WORDS; i++) { |
1600 |
err |= (__get_user(set.sig[i], &sf->extramask[i - 1]));
|
1601 |
} |
1602 |
|
1603 |
target_to_host_sigset_internal(&host_set, &set); |
1604 |
sigprocmask(SIG_SETMASK, &host_set, NULL);
|
1605 |
|
1606 |
if (err)
|
1607 |
goto segv_and_exit;
|
1608 |
|
1609 |
return env->regwptr[0]; |
1610 |
|
1611 |
segv_and_exit:
|
1612 |
force_sig(TARGET_SIGSEGV); |
1613 |
} |
1614 |
|
1615 |
long do_rt_sigreturn(CPUState *env)
|
1616 |
{ |
1617 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
1618 |
return -ENOSYS;
|
1619 |
} |
1620 |
|
1621 |
|
1622 |
#else
|
1623 |
|
1624 |
static void setup_frame(int sig, struct emulated_sigaction *ka, |
1625 |
target_sigset_t *set, CPUState *env) |
1626 |
{ |
1627 |
fprintf(stderr, "setup_frame: not implemented\n");
|
1628 |
} |
1629 |
|
1630 |
static void setup_rt_frame(int sig, struct emulated_sigaction *ka, |
1631 |
target_siginfo_t *info, |
1632 |
target_sigset_t *set, CPUState *env) |
1633 |
{ |
1634 |
fprintf(stderr, "setup_rt_frame: not implemented\n");
|
1635 |
} |
1636 |
|
1637 |
long do_sigreturn(CPUState *env)
|
1638 |
{ |
1639 |
fprintf(stderr, "do_sigreturn: not implemented\n");
|
1640 |
return -ENOSYS;
|
1641 |
} |
1642 |
|
1643 |
long do_rt_sigreturn(CPUState *env)
|
1644 |
{ |
1645 |
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
|
1646 |
return -ENOSYS;
|
1647 |
} |
1648 |
|
1649 |
#endif
|
1650 |
|
1651 |
void process_pending_signals(void *cpu_env) |
1652 |
{ |
1653 |
int sig;
|
1654 |
target_ulong handler; |
1655 |
sigset_t set, old_set; |
1656 |
target_sigset_t target_old_set; |
1657 |
struct emulated_sigaction *k;
|
1658 |
struct sigqueue *q;
|
1659 |
|
1660 |
if (!signal_pending)
|
1661 |
return;
|
1662 |
|
1663 |
k = sigact_table; |
1664 |
for(sig = 1; sig <= TARGET_NSIG; sig++) { |
1665 |
if (k->pending)
|
1666 |
goto handle_signal;
|
1667 |
k++; |
1668 |
} |
1669 |
/* if no signal is pending, just return */
|
1670 |
signal_pending = 0;
|
1671 |
return;
|
1672 |
|
1673 |
handle_signal:
|
1674 |
#ifdef DEBUG_SIGNAL
|
1675 |
fprintf(stderr, "qemu: process signal %d\n", sig);
|
1676 |
#endif
|
1677 |
/* dequeue signal */
|
1678 |
q = k->first; |
1679 |
k->first = q->next; |
1680 |
if (!k->first)
|
1681 |
k->pending = 0;
|
1682 |
|
1683 |
sig = gdb_handlesig (cpu_env, sig); |
1684 |
if (!sig) {
|
1685 |
fprintf (stderr, "Lost signal\n");
|
1686 |
abort(); |
1687 |
} |
1688 |
|
1689 |
handler = k->sa._sa_handler; |
1690 |
if (handler == TARGET_SIG_DFL) {
|
1691 |
/* default handler : ignore some signal. The other are fatal */
|
1692 |
if (sig != TARGET_SIGCHLD &&
|
1693 |
sig != TARGET_SIGURG && |
1694 |
sig != TARGET_SIGWINCH) { |
1695 |
force_sig(sig); |
1696 |
} |
1697 |
} else if (handler == TARGET_SIG_IGN) { |
1698 |
/* ignore sig */
|
1699 |
} else if (handler == TARGET_SIG_ERR) { |
1700 |
force_sig(sig); |
1701 |
} else {
|
1702 |
/* compute the blocked signals during the handler execution */
|
1703 |
target_to_host_sigset(&set, &k->sa.sa_mask); |
1704 |
/* SA_NODEFER indicates that the current signal should not be
|
1705 |
blocked during the handler */
|
1706 |
if (!(k->sa.sa_flags & TARGET_SA_NODEFER))
|
1707 |
sigaddset(&set, target_to_host_signal(sig)); |
1708 |
|
1709 |
/* block signals in the handler using Linux */
|
1710 |
sigprocmask(SIG_BLOCK, &set, &old_set); |
1711 |
/* save the previous blocked signal state to restore it at the
|
1712 |
end of the signal execution (see do_sigreturn) */
|
1713 |
host_to_target_sigset_internal(&target_old_set, &old_set); |
1714 |
|
1715 |
/* if the CPU is in VM86 mode, we restore the 32 bit values */
|
1716 |
#ifdef TARGET_I386
|
1717 |
{ |
1718 |
CPUX86State *env = cpu_env; |
1719 |
if (env->eflags & VM_MASK)
|
1720 |
save_v86_state(env); |
1721 |
} |
1722 |
#endif
|
1723 |
/* prepare the stack frame of the virtual CPU */
|
1724 |
if (k->sa.sa_flags & TARGET_SA_SIGINFO)
|
1725 |
setup_rt_frame(sig, k, &q->info, &target_old_set, cpu_env); |
1726 |
else
|
1727 |
setup_frame(sig, k, &target_old_set, cpu_env); |
1728 |
if (k->sa.sa_flags & TARGET_SA_RESETHAND)
|
1729 |
k->sa._sa_handler = TARGET_SIG_DFL; |
1730 |
} |
1731 |
if (q != &k->info)
|
1732 |
free_sigqueue(q); |
1733 |
} |
1734 |
|
1735 |
|